The quarry vibrating screen is mainly used to screen gravel, and the quality of the screen mesh determines the material screening efficiency. Therefore, quarry investors or equipment purchasers will ask the manufacturer for information about vibrating screen media types when choosing a vibrating screen.
Rayco designs and manufactures a complete set of high quality and cost-effective rubber screens. They are used to treat the roughest and most abrasive products, such as gravel, coal, slag, etc. Rubber material is soft and powerful, can absorb shock and have long service life, which not only can reduce the downtime, but also makes installation easier and faster. If noise reduction is required, rubber screens are good choices.
Rayco rubber sieve can be divided into two kinds: tension and modular. The tension type can be installed as a circular vibrating screen and replace the original metal screen or polyurethane screen. The modular type can be installed in many ways, which can better save operating costs.
The polyurethane screen is made of polyurethane and embedded in a steel frame. It has a specially designed fastening hook to clamp the mesh to the separator. Polyurethane screen has excellent performance in mining crushing and aggregate screening industry. Different sizes and types of mesh hole ensure high screening efficiency and smooth surfaces. Polyurethane materials make mesh noise much lower than braided vibrating mesh or perforated mesh.
Our polyurethane screens can effectively screen materials for many industrial applications, such as dehydration, mining, sand, stone, gravel, etc. Polyurethane is ideal for high wear areas in both wet and dry processing applications.
THe high-strength woven wire screen is made of best steel wire like manganese steel wire, galvanized steel wire and stainless steel wire. The mesh hole can be square, rectangular, or longslotted. With a variety of woven types, it can be suitable for different screens and materials.
The perforated screen is made of a metal plate with high compressive strength after punching. Compared with woven vibrating screen, porous vibrating screen has a smooth surface, which can ensure higher screening and separation efficiency.
When the smaller rock has to be classified a vibrating screen will be used.The simplest Vibrating Screen Working Principle can be explained using the single deck screen and put it onto an inclined frame. The frame is mounted on springs. The vibration is generated from an unbalanced flywheel. A very erratic motion is developed when this wheel is rotated. You will find these simple screens in smaller operations and rock quarries where sizing isnt as critical. As the performance of this type of screen isnt good enough to meet the requirements of most mining operations two variations of this screen have been developed.
In the majority of cases, the types of screen decks that you will be operating will be either the horizontal screen or the inclined vibrating screen. The names of these screens do not reflect the angle that the screens are on, they reflect the direction of the motion that is creating the vibration.
An eccentric shaft is used in the inclined vibrating screen. There is an advantage of using this method of vibration generation over the unbalanced flywheel method first mentioned. The vibration of an unbalanced flywheel is very violent. This causes mechanical failure and structural damage to occur. The four-bearing system greatly reduces this problem. Why these screens are vibrated is to ensure that the ore comes into contact will the screen. By vibrating the screen the rock will be bounced around on top of it. This means, that by the time that the rock has traveled the length of the screen, it will have had the opportunity of hitting the screen mesh at just the right angle to be able to penetrate through it. If the rock is small enough it will be removed from the circuit. The large rock will, of course, be taken to the next stage in the process. Depending upon the tonnage and the size of the feed, there may be two sets of screens for each machine.
The reason for using two decks is to increase the surface area that the ore has to come into contact with. The top deck will have bigger holes in the grid of the screen. The size of the ore that it will be removed will be larger than that on the bottom. Only the small rock that is able to pass through the bottom screen will be removed from the circuit. In most cases the large rock that was on top of each screen will be mixed back together again.
The main cause of mechanical failure in screen decks is vibration. Even the frame, body, and bearings are affected by this. The larger the screen the bigger the effect. The vibration will crystallize the molecular structure of the metal causing what is known as METAL FATIGUE to develop. The first sign that an operator has indicated that the fatigue in the body of the screen deck is almost at a critical stage in its development are the hairline cracks that will appear around the vibrations point of origin. The bearings on the bigger screens have to be watched closer than most as they tend to fail suddenly. This is due to the vibration as well.
In plant design, it is usual to install a screen ahead of the secondary crusher to bypass any ore which has already been crushed small enough, and so to relieve it of unnecessary work. Very close screening is not required and some sort of moving bar or ring grizzly can well be used, but the modern method is to employ for the purpose a heavy-duty vibrating screen of the Hummer type which has no external moving parts to wear out ; the vibrator is totally enclosed and the only part subjected to wear is the surface of the screen.
The Hummer Screen, illustrated in Fig. 6, is the machine usually employed for the work, being designed for heavy and rough duty. It consists of a fixed frame, set on the slope, across which is tightly stretched a woven-wire screen composed of large diameter wires, or rods, of a special, hard-wearing alloy. A metal strip, bent over to the required angle, is fitted along the length of each side of the screen so that it can be secured to the frame at the correct tension by means of spring-loaded hook bolts. A vibrating mechanism attached to the middle of the screen imparts rapid vibrations of small amplitude to its surface, making the ore, which enters at the top, pass down it in an even mobile stream. The spring-loaded bolts, which can be seen in section in Fig. 7, movewith a hinge action, allowing unrestricted movement of the entire screening surface without transmitting the vibrations to the frame.
One, two, or three vibrators, depending on the length of the screen, are mounted across the frame and are connected through their armatures with a steel strip securely fixed down the middle of the screen. The powerful Type 50 Vibrator, used for heavy work, is shown in Fig. 7. The movement of the armature is directly controlled by the solenoid coil, which is connected by an external cable with a supply of 15-cycle single-phase alternating current ; this produces the alternating field in the coil that causes the up-and-down movement of the armature at the rate of thirty vibrations per second. At the end of every return stroke it hits a striking block and imparts to the screen a jerk which throws the larger pieces of ore to the top of the bed and gives the fine particles a better chance of passing through the meshes during the rest of the cycle. The motion can be regulated by spiral springs controlled by a handwheel, thus enabling the intensity of the vibrations to be adjusted within close limits. No lubrication is required either for the vibrating mechanism or for any other part of the screen, and the 15-cycle alternating current is usually supplied by a special motor-generator set placed somewhere where dust cannot reach it.
The Type 70 Screen is usually made 4 ft. wide and from 5 to 10 ft. in length. For the rough work described above it can be relied upon to give a capacity of 4 to 5 tons per square foot when screening to about in. and set at a slope of 25 to 30 degrees to the horizontal. The Type 50 Vibrator requires about 2 h.p. for its operation.
The determination of screen capacity is a very complex subject. There is a lot of theory on the subject that has been developed over many years of the manufacture of screens and much study of the results of their use. However, it is still necessary to test the results of a new installation to be reasonably certain of the screen capacity.
A general rule of thumb for good screening is that: The bed depth of material at the discharge end of a screen should never be over four times the size opening in the screen surface for material weighing 100 pounds per cubic foot or three times for material weighing 50 pounds per cubic foot. The feed end depth can be greater, particularly if the feed contains a large percentage of fines. Other interrelated factors are:
Vibration is produced on inclined screens by circular motion in a plane perpendicular to the screen with one-eighth to -in. amplitude at 700-1000 cycles per minute. The vibration lifts the material producing stratification. And with the screen on an incline, the material will cascade down the slope, introducing the probability that the particles will either pass through the screen openings or over their surface.
Screen capacity is dependent on the type, available area, and cleanliness of the screen and screenability of the aggregate. Belowis a general guide for determining screen capacity. The values may be used for dried aggregate where blinding (plugged screen openings), moisture build-up or other screening problems will not be encountered. In this table it is assumed that approximately 25% of the screen load is retained, for example, if the capacity of a screen is 100 tons/hr (tph) the approximate load on the screen would be 133 tph.
It is possible to not have enough material on a screen for it to be effective. For very small feed rates, the efficiency of a screen increases with increasing tonnage on the screen. The bed of oversize material on top of the marginal particlesstratification prevents them from bouncing around excessively, increases their number of attempts to get through the screen, and helps push them through. However, beyond an optimum point increasing tonnage on the screen causes a rather rapid decrease in the efficiency of the screen to serve its purpose.
Two common methods for calculating screen efficiency depend on whether the desired product is overs or throughs from the screen deck. If the oversize is considered to be the product, the screen operation should remove as much as possible of the undersize material. In that case, screen performance is based on the efficiency of undersize removal. When the throughs are considered to be the product, the operation should recover as much of the undersize material as possible. In that case, screen performance is based on the efficiency of undersize recovery.
These efficiency determinations necessitate taking a sample of the feed to the screen deck and one of the material that passes over the deck, that is, does not pass through it. These samples are subjected to sieve analysis tests to find the gradation of the materials. The results of these tests lead to the efficiencies. The equations for the screen efficiencies are as follows:
In both cases the amount of undersize material, which is included in the material that goes over the screen is relatively small. In Case 1 the undersize going over the screen is 19 10 = 9 tph, whereas in Case 2 the undersize going over is 55 50 = 5 tph. That would suggest that the efficiency of the screen in removing undersize material is nearly the same. However, it is the proportion of undersize material that is in the material going over the screen, that is, not passed through the screen, that determines the efficiency of the screen.
In the first cases the product is the oversize material fed to the screen and passed over it. And screen efficiency is based on how well the undersize material is removed from the overs. In other cases the undersize material fed to the screen, that is, the throughs, is considered the product. And the efficiency is dependent on how much of the undersize material is recovered in the throughs. This screen efficiency is determined by the Equation B above.An example using the case 1 situation for the throughs as the product gives a new case to consider for screen efficiency.
Generally, manufacturers of screening units of one, two, or three decks specify the many dimensions that may be of concern to the user, including the total headroom required for screen angles of 10-25 from the horizontal. Very few manufacturers show in their screen specifications the capacity to expect in tph per square foot of screen area. If they do indicate capacities for different screen openings, the bases are that the feed be granular free-flowing material with a unit weight of 100 lb/cu ft. Also the screen cloth will have 50% or more open area, 25% of total feed passing over the deck, 40% is half size, and screen efficiency is 90%. And all of those stipulations are for a one-deck unit with the deck at an 18 to 20 slope.
As was discussed with screen efficiencies, there will be some overs on the first passes that will contain undersize material but will not go through the screen. This material will continue recirculating until it passes through the screen. This is called the circulating load. By definition, circulating load equals the total feed to the crusher system with screens minus the new feed to the crusher. It is stated as a percentage of the new feed to the crusher. The equation for circulating load percentage is:
To help understand this determination and the equation use, take the example of 200 tph original or new material to the crusher. Assume 100% screen efficiency and 30% oversize in the crusher input. For the successive cycles of the circulating load:
The values for the circulating load percentages can be tabulated for various typical screen efficiencies and percents of oversize in the crusher product from one to 99%. This will expedite the determination for the circulating load in a closed Circuit crusher and screening system.
Among the key factors that have to be taken into account in determining the screen area required is the deck correction. A top deck should have a capacity as determined by trial and testing of the product output, but the capacity of each succeeding lower deck will be reduced by 10% because of the lower amount of oversize for stratification on the following decks. For example, the third deck would be 80% as effective as the top deck. Wash water or spray will increase the effectiveness of the screens with openings of less than 1 in. in size. In fact, a deck with water spray on 3/16 in. openings will be more than three times as effective as the same size without the water spray.
For efficient wet or dry screeningHi-capacity, 2-bearing design. Flywheel weights counterbalance eccentric shaft giving a true-circle motion to screen. Spring suspensions carry the weight. Bearings support only weight of shaft. Screen is free to float and follow positive screening motion without power-consuming friction losses. Saves up to 50% HP over4- bearing types. Sizes 1 x 2 to 6 x 14, single or double deck types, suspended or floor mounted units.Also Revolving (Trommel) Screens. For sizing, desliming or scrubbing. Sizes from 30 x 60 to 120.
TheVibrating Screen has rapidly come to the front as a leader in the sizing and dewatering of mining and industrial products. Its almost unlimited uses vary from the screening for size of crusher products to the accurate sizing of medicinal pellets. The Vibrating Screen is also used for wet sizing by operating the screen on an uphill slope, the lower end being under the surface of the liquid.
The main feature of the Vibrating Screen is the patented mechanism. In operation, the screen shaft rotates on two eccentrically mounted bearings, and this eccentric motion is transmitted into the screen body, causing a true circular throw motion, the radius of which is equivalent to the radius of eccentricity on the eccentric portion of the shaft. The simplicity of this construction allows the screen to be manufactured with a light weight but sturdy mechanism which is low in initial cost, low in maintenance and power costs, and yet has a high, positive capacity.
The Vibrating Screen is available in single and multiple deck units for floor mounting or suspension. The side panels are equipped with flanges containing precision punched bolt holes so that an additional deck may be added in the future by merely bolting the new deck either on the top or the bottom of the original deck. The advantage of this feature is that added capacity is gained without purchasing a separate mechanism, since the mechanisms originally furnished are designed for this feature. A positivemethod of maintaining proper screen tension is employed, the method depending on the wire diameter involved. Screen cloths are mounted on rubber covered camber bars, slightly arched for even distribution.
Standard screens are furnished with suspension rod or cable assemblies, or floor mounting brackets. Initial covering of standard steel screen cloth is included for separations down to 20 mesh. Suspension frame, fine mesh wire, and dust enclosure are furnished at a slight additional cost. Motor driven units include totally-enclosed, ball-bearing motors. The Vibrating Screen can be driven from either side. The driven sheave is included on units furnished without the drive.
The following table shows the many sizes available. Standard screens listed below are available in single and double deck units. The triple and quadruple deck units consist of double deck units with an additional deck or decks flanged to the original deck. Please consult our experienced staff of screening engineers for additional information and recommendations on your screening problems.
An extremely simple, positive method of imparting uniform vibration to the screen body. Using only two bearings and with no dead weight supported by them, the shaft is in effect floating on the two heavy-duty bearings.
The unit consists of the freely suspended screen body and a shaft assembly carried by the screen body. Near each end of the shaft, an eccentric portion is turned. The shaft is counterbalanced, by weighted fly-wheels, against the weight of the screen and loads that may be superimposed on it. When the shaft rotates, eccentric motion is transmitted from the eccentric portions, through the two bearings, to the screen frame.
The patented design of Dillon Vibrating Screens requires just two bearings instead of the four used in ordinary mechanical screens, resulting in simplicity of construction which cuts power cost in half for any screening job; reduces operating and maintenance costs.
With this simplified, lighter weight construction all power is put to useful work thus, the screen can operate at higher speeds when desired, giving greater screening capacity at lower power cost. The sting of the positive, high speed vibration eliminates blinding of screen openings.
The sketches below demonstrate the four standard methods of fastening a screen cloth to the Dillon Screen. The choice of method is generally dependent on screen wire diameters. It is recommended that the following guide be followed:
Before Separation can take place we need to get the fine particles to the bottom of the pile next to the screen deck openings and the coarse particles to the top. Without this phenomenon, we would have all the big particles blocking the openings with the fines resting atop of them and never going through.
We need to state that 100% efficiency, that is, putting every undersize particle through and every oversize particle over, is impossible. If you put 95% of the undersize pieces through we in the screen business call that commercially perfect.
The screens serve to classify the different particles by size, starting from a bulk product in a continuous process. The inlet material (the raw product) advances from the part where the screen is fed to the opposite end in which the particles come out separately according to their size, shape or density. There are also vibrating screens that are loaded by the center and the product moves radially to the outputs that are on the periphery.
For the correct advancement of the product it is necessary that the process is continuous, and it is due to the vibration if the screening surface is horizontal. Most of the screens have a certain inclination in such a way that the advance movement of the product is due to a combination between gravity and vibration.
The screening elements are flat or slightly curved surfaces having perforations of a certain size such that when a product is poured in bulk on the element it only passes those particles whose size is smaller than the size of the perforations.
The screening elements can be a metallic or nylon wire mesh, bars that pass material between them, metal sheet with circular, square or hexagonal perforations, more or less rigid sheets of rubber or polyurethane with perforations.
A screen can have several screening elements on top of each other forming different floors. In this case, the floor with the larger perforations is placed in the upper part and successively in lower floors the elements with smaller and smaller perforations are mounted. In this way each particle is trapped between the floor that has cut points (openings) greater than the particle and the floor that has smaller cut points.
Traditionally there have been non-vibrating screens consisting of a fixed mesh with a lot of inclination. When introducing the vibration, the product shakes and the particles jump without sliding on the screening surface. Each jump is an attempt of the particle to pass through a hole and the probability of this happening is much greater if the machine vibrates. In other words, the effectiveness is much greater.
When a particle jumps and falls again it can do so in a hole or an area where there is no hole. If the screening element is a wire mesh, the particle can fall on the wire or on another particle and not squeeze through the hole it should. This is why no screen has an efficiency of 100% because it would require an infinite number of jumps so that all the smaller particles that the holes actually leak.
The more quantity of product you intend to classify, the more surface you need for screening. The most immediate symptom that a screen has become too small is that it decreases its effectiveness because it simply does not fit so many particles through the holes.
As a general rule for large classifications, low frequencies and large vibration amplitudes are preferable and for fine classifications high frequencies and small amplitudes. In other words, if the particle is large, a slow and wide movement is better in which the particle gives few jumps but large and if it is small it is better than many jumps but smaller. It is a question of the particle not passing several single jump holes.
In the screens, as in any sorting machine, it is necessary to take advantage of the entire width of the work surface from the beginning of it. If the product falls piled on the screening surface, the particles of the top of the pile will not touch the mesh or the screening element until the pile disappears by the vibration. By the time this happens, it will already have traveled half way of the surface. In other words, we waste surface with a very important loss of production and also the area where the pile is made will receive severe wear with the consequent extra maintenance expenses. It also increases, especially with products of low density, the risk of jams if the pile takes a lot of height. This makes no sense and it is not acceptable for correct screening.
A good vibrating screen must be reliable, minimize wear and maintenance and have a strong vibration as any vibrating machine that boasts: the more it vibrates the better it goes, that is, it gives more production and efficiency.
On the other hand, most of the bad screens are not really bad but inappropriate to use: If the product is wet and sticky, it will stick to a metal screening element rather than a polyurethane screening element. If it is dry and fine, the screen should be dust-tight. If it is a matter of screening large and heavy particles, the screen should be very robust. If it is very robust and used with fine products, it will consume more than necessary in electricity and maintenance costs (but that shouldnt pose as a problem because business energy suppliers can be compared at Utility Saving Expert).
The combinations are endless, and a good selection, suitable for use at first, will make the user does not have to remember this machine again in life, or at least until he needs to install another screen.
Vibramech vibrating screens are custom designed for client needs and cover a vast range of sizes and unique process applications. Our screen design makes use of Finite Element Method and Strain Gauge Analysis to prove structural integrity. Our vibrating screens also feature wear protection and commonality of components to minimise spare parts inventories.
Horizontal Screens Horizontal screens are designed for wet or dry applications, ideal for smaller aperture sizing, de-sliming or dense medium recovery. Available in single-, double- and triple-deck configurations.
Dewatering Screens Vibrator motor-driven dewatering screens are designed for dewatering applications. They feature high G-forces with a dual-sloped screening deck for superior water removal.
Inclined Screens Inclined screens, typically installed at a 15 or 19 deck angle, are combined with an optimised drive configuration. They are designed for large aperture screening or heavy-duty scalping applications.
Liwell Screens Liwell screens are for difficult screening applications where sticky material is screened at small aperture sizes without process water. We are the exclusive sub-Saharan African distributor.
Vibramech screens are equipped with vibrator motor, geared exciter or oscillator drives, and are available in single-, double- or triple-deck configuration. The range of screening media includes polyurethane panels, rubber panels, wedge wire panels or woven wire panels. Screen isolation is achieved using rubber buffers, coil springs or Rosta mount isolators, and screens can be supplied with sub-frames if additional isolation is required.
Our flexibility in design provides customers the freedom to optimise their plant infrastructure without the standard screen geometric constraints, and enables screens to be retrofitted to existing infrastructure. Other features include:
Over 500 units of Vibramech vibrating equipment are supplied and commissioned worldwide each year. Complete the enquiry form to see how Vibramech vibrating screens will optimise your screening processes.
Vibramech has vibrating equipment installed throughout Africa and internationally, including Australia, Canada, China, India, USA and South America, Philippines, Russia and United Kingdom. This has resulted in an installed base of over 8000 pieces of Vibramech vibrating mineral processing equipment worldwide.
Vibramech supplies vibrating equipment primarily to the mining and mineral processing industries across the globe and has extensive experience in gold, diamond, coal, iron ore, manganese, platinum, chrome, nickel, uranium, copper, mineral sands and aggregate operations.
According to different structure and use, vibrating screens usually be devided into many types by the vibrating screen manufacturers. Below wil introduce the top 10 vibrating screens, and how to choose the right vibratory screen?
linear vibrating screen is driven by double vibrating motors. When the two vibrating motors are rotating synchronously and reversely, the excitation force generated by the eccentric block offsets each other in the direction parallel to the axis of the motor, and overlaps into a resultant force in the direction perpendicular to the axis of the motor, so the motion track of the linear vibrating screen machine is a straight line.
Working Principle:The two motor axes of the linear vibrating screen have an angle of inclination in the vertical direction relative to the screen panel. Under the combined force of the exciting force and the self gravity of the material, the material is thrown on the screen surface to jump or move forward in a straight line. Through the multi-layer screen panels, a variety of specifications of materials are generated, and discharged from their respective outlets, so as to achieve screening and classification. linear vibrating screen is suitable for screening various dry powder or granular materials with particle size of 0.074-5mm, moisture content <7%, and no viscosity. The feed particle size is not more than 10 mm.
Circular vibrating screen is a new type of vibrating screen with multi-layer screen and high efficiency. According to the type of materials and the requirements of users, the high manganese steel woven screen, punched screen plate and rubber screen plate can be used. The circular vibrating screen is installed in the seat type. The adjustment of the screen surface angle can be realized by changing the position and height of the spring support.
Working Principle: The motion track of the screen box of the circular vibrating screen is circular. The circular vibrating screen uses the inertia exciter to produce vibration. The main shaft fixed on the screen box is driven by the motor to rotate at high speed, and the eccentric body installed on the main shaft rotates with it, generating centrifugal inertia force, so that the screen box that can freely vibrate will produce vibration similar to the circular track.
Circular vibrating screen is widely used in the materials classification of mining, building materials, transportation, energy, chemical industry and other industries because of its long flowing line and many screening specifications.
Elliptical vibrating screen is a vibrating screen with elliptical motion track (Elliptical Shale Shaker), which has the advantages of high efficiency, high screening accuracy and wide range of application. Compared with the ordinary sieve machine of the same specification, it has larger processing capacity and higher screening efficiency.
Triaxial elliptical vibrating screen is widely used for the screening operation of sand and stone materials in sand plant. It is the ideal screening equipment for all kinds of mines, quarries and mobile screening stations.
Working Principle: The power is transmitted from the motor to the main shaft of the exciter and the gear vibrator (speed ratio is 1) through the V-belt, so that the three shafts can rotate at the same speed and generate the exciting force. The exciter is connected with the high-strength bolts of the screen box, resulting in elliptical movement.
Materials on the screens do high-speed elliptical movement along with the screen machine, so as to achieve uickly separate, sift and move forward, and ultimately complete the classification of materials.
The working surface of the roller screen is composed of a series of rolling shafts that arranged horizontally, on which there are many screen plates. When working, the fine material passes through the gap between the roller or screen plate, large blocks of materials are driven by rollers, moving to the ends and discharging from the outlets. Roller screens are mostly used in the traditional coal industry.
Working Principle: For the rolling shafts are arranged according to different working angles, the speed of the material is faster when it runs in the position with higher working angle; the speed of the material is slower when it runs in the position with lower working angle.
When two kinds of materials running at different speeds converge at a certain position on the screen surface, they start to move axially, so that the materials are evenly distributed on the screen surface, and the screening efficiency is improved.
Rotary vibrating screen is mainly used for the classification of materials with high screening efficiency and fine screening accuracy. Fully closed structure, no flying powder, no leakage of liquid, no blocking of mesh, automatic discharge, no material storage in the machine, no dead angle of grid structure, increased screen area.
Any particle, powder and mucus can be screened within a certain range. Sieve to 500 mesh or 0.028mm, filter to 5 microns minimum. It can be used for classification, classification and filtration in food, chemical, metal, mining and other industries.
With the help of the heavy hammer installed at the upper and lower ends of the motor shaft, the rotary motion of the motor is transformed into a horizontal, vertical and inclined three-dimensional motion, which is then transmitted to the screen surface to make the material do an outward involute motion on the screen surface. Working Principle: After the rotary screen is started, the eccentric blocks of different phases at the upper and lower ends of the vibrating motor generate a composite inertia force, which forces the vibrating body of the rotary screen machine to rotate again and again, and the screen frame continuously moves to and fro under the action of the vibration force, and then drives the screen surface to vibrate periodically, so that the materials on the screen surface move in a positive and directional manner together with the screen box. Materials smaller than the screen meshes fall to the lower layer, and the materials larger than the screen meshes discharged from the discharge port.
High frequency vibrating screen is also called high frequency screen for short. High frequency vibrating screen (high frequency screen) is composed of exciter, pulp distributor, screen frame, supporting, suspension spring and screen, etc. High frequency vibrating screen is the most important screening machine in mineral processing industry, which is suitable for completely wet or dry raw materials.
Working Principle: Different from ordinary screening equipments, high frequency screen adopts high frequency, which destroys the tension on the pulp surface and makes the fine materials vibrate at high speed on the screen, accelerates the separation of useful minerals with large density (specific gravity), and increases the probability of contact between the materials with smaller than the separated particle size and the screen holes.
As a result, high frequency screen results in a better separation conditions, which makes the materials that smaller than the separation size (especially with larger specific gravity), and pulp pass through the screen holes together to complete the screening. High-frequency vibrating screen is usually operated at an inclined angle 0-25, up to 45, and the operating frequency range is 1500-7200r/m.
Grizzly screen has simple and solid structure, no power consumption, no moving parts, low equipment cost and convenient maintenance, but the productivity is low, the screening efficiency is not high, generally 50% 60%, and the mesh is easy to be blocked.
Working Principle: Generally, the grizzly screen is placed in an inclined position, and the materials are dumped at the high end. Under the action of its own weight, it slides down the screen surface, and the particles smaller than the gap or hole on the screen surface pass through the screen to achieve classification.
Banana screen is mainly suitable for the classification of large and medium-sized materials with high content of fine particles, and it can also be used for dehydration, demineralization and desliming.
Working Principle: During operation, the motor is connected with the vibration exciter through the V-belt or soft connection. The motor drives the eccentric shaft to rotate to generate centrifugal inertia force, which forces the screen box to vibrate. After the materials fall into the screen from the feeding inlet, they move forward rapidly under the action of the vibration force, loosely and pass through the screen.The thickness of the material layer of banana screen from the feeding inlet to the discharging outlet is constant. The ratio of the material quantity to the flow speed on the screen of each section is stable, the material layer is high and uniform. The screening efficiency of banana screen is higher, which is 1-2 times higher than that of other screening machines with the same effective area.
Heavy inclined screen can be applied to the treatment of debris from quarry, mine and building demolition, the treatment of topsoil, the recycling of construction materials, the screening of gravel, and the screening of gravel and aggregates.
Working Principle: The screen box shaft is driven by the motor installed on the auxiliary frame through three V-belts, the auxiliary frame is rigidly connected with the machine underframe, and the screen box spring is used to support the screen box.Inclined screen usually adopts 2-4-layer screen panels, and is fixed on the inclined frame at an angle between 15 and 30. The material can be screened into 3-5 grades at the same time.
Horizontal screen has the advantages of both inclined screen and linear vibrating screen. horizontal screen has the features of good screen permeability, large processing capacity and small installation height.
The installation angle of common vibrating screen is 15-30, while the installation of horizontal screen is parallel to the ground, or slightly inclined 0-5. Horizontal screen is an ideal equipment for all kinds of mines, quarries and mobile screening stations.
Working Principle: Horizontal screen is designed with oval stroke. The advantage of this design is that it can change the oval big diameter length and angle of throwing material stroke to meet the best needs of vibrating screen. The oval stroke is easy to adjust by center gear, counterweight wheel and motor speed.
Different types of vibrating screens can be used for the same material to get different screening effects. The reasonable selection of vibrating screen is an effective way to improve vibration efficiency and maximize economic benefits. Generally, you need to consider the following 5 tips:
When choosing vibratory screen, the material characteristics should be taken into account, including the content of material particles under the screen, the content of difficult screen particles, material moisture, the shape and specific gravity of the material, and the content of clay.
Tips: Heavy vibrating screen is used for materials above 200mm; circular vibrating screen is used for materials above 10mm; linear vibrating screen and high frequency vibrating screen are used for desliming, dewatering and grading.
When selecting the vibratory screen, the screen areas, layer numbers, shape, size and area ratio of the screen holes, as well as the motion mode, vibration frequency and amplitude of the vibrating screen should also be considered.
Tips: In order to keep the screens under good working conditions, the ratio of screen length to width should be in the range of 2-3; when there is much viscous mud and high moisture in the material, double deck screens should be avoided as far as possible.
Vibratory screens need to be selected according to different screening purposes. If it is necessary to pre screen materials, circular vibrating screens are generally used; for the classification and screening of crushed materials, large vibrating screens and probability screens are selected; for the deionization and dehydration of materials, linear vibrating screens are better; if it is necessary to desliminate and clean up materials, probability screens are used.
When selecting the shale shakers, it also needs to be considered according to the processing capacity of the production line, screening method, screening efficiency and the tilt angle of the shale shakers.
Professional vibrating screen manufacturers could provide competitive vibrating screen price, diversity customized vibrating screen models, timely after-sales service, spare parts and can continue to provide services for customers whole production circle.
Vacuum feeding machine is produced and sold by Xinxiang Dayong vibration equipment Co., Ltd. It is used for vacuum feeding of powder and particles. It can be made of SUS304 material or customized according to the materials transported. It is cheap and easy to operate.Vacuum feeder has low noise, no vibration and energy saving.
The popular vacuum powder feeder in China is produced and sold by Xinxiang Dayong vibrating screen equipment Co., Ltd. It is used for vacuum feeding of various powders and particles, such as food industry and pharmaceutical industry. It not only avoids the pollution of environment to materials, but also avoids the pollution of workers to materials.
The vacuum feeding system of sugar and coffee industrial powder is a vacuum feeding machine produced and sold by Xinxiang Dayong company, which is specially used for vacuum feeding of various powders. It can be used in food industry and pharmaceutical industry, and can be used for vacuum feeding of coffee and sugar. Convenient and fast.
Vacuum feeding machine is produced and sold by Xinxiang Dayong vibration equipment Co., Ltd. It is used for conveying various powder and granular materials. The intermittent vacuum feeding can manually set the time of feeding and discharging. The operation is simple and easy to learn.It is convenient and safe to use.
Vacuum feeding machine is a special system for conveying various powder materials produced and sold by Xinxiang Dayong company, which can be used for vacuum conveying of flour.Vacuum feeding machine can be used for raw material powder, chemical powder and metal oxide powder; Capsules, tablets, pills, small food granules, etc.
Vacuum feeder is produced and sold by Xinxiang Dayong vibration equipment Co., Ltd. It is a new type of dust-free powder vacuum conveying system, which is used in many industries to avoid the pollution of the environment and workers to the materials.The vacuum feeding machine has the advantages of simple structure, easy operation, small volume and no space occupation.
Vacuum feeder is produced and sold by Xinxiang Dayong company, which is used in industry, agriculture, food industry and other industries. Vacuum feeder can be used for fast transportation of grain.Vacuum feeder can reduce labor intensity and improve work efficiency; It is an ideal choice for most of the powder materials.
Vacuum feeder is produced and sold by Xinxiang Dayong company. It is used in various industries and can be used for vacuum feeding of PVC powder.Now vacuum feeder is widely used in chemical industry, pharmaceutical industry, food industry, metallurgy industry, building material industry, agricultural and sideline industries; Make the processing of these industries easy and simple.
Vacuum feeder is produced and sold by Xinxiang Dayong vibration equipment Co., Ltd. It is used for powder feeding and transportation in the food industry. It can be used for the transportation of high protein powder and other food industry powder to avoid the transportation of high protein powder and other materials.The vacuum feeder is equipped with quick mounting clamp, which is convenient for folding and cleaning and meets the requirements.
Powder automatic vacuum feeding and conveying system, namely vacuum feeder, is produced and sold by Xinxiang Dayong vibration equipment Co., Ltd. It is used for conveying all kinds of powder to avoid environmental pollution and ensure the health of workers.The structure is compact, the mobile is convenient and the operation is simple.
The ultrasonic vibrating screen is produced and sold by Xinxiang Dayong. It can be made of stainless steel and customized according to the characteristics of the screened materials. Ultrasonic vibrating screen is widely used in various industries, especially in the screening of ultra-fine subdivision, which is used to remove impurities and powder classification.
Ultrasonic vibrating screen is produced and sold by Xinxiang Dayong company, which has a wide range of applications. It can be used for fine screening of fine chemical powder in chemical industry.Great breakthrough has been made in the performance of ultrasonic vibrating screen. The screening precision can be increased by 1-00%, and the output can be increased by 1-0 times, which can really meet the needs of industrial production of more than 500 mesh.
The mechanical high-precision ultrasonic vibrating screen for iron ore powder is produced by Xinxiang Dayong Vibrating Equipment Co., Ltd., which is used for industrial screening of high-precision ore powder.The ultrasonic vibrating screen is especially suitable for the users of high value-added fine separation. It is specially made for the screening of irregular materials and ultra-fine materials.
The low rotation vibrating screen of metal powder screening machine is the screening of metal powder used in industrial industry manufactured and sold by Xinxiang big use vibration equipment Co., Ltd. Unique square box and screen frame design, which improves the duration of screen mesh. Tool-free quick release clamping for fast and easy dis-assembly.
Low Profile Sifter is a kind of screening for mud produced and sold by Xinxiang large utility company. It is small in volume and easy to move.The straight-through design, makes it able to process large amount of material. Super mute design, 70 db in general.
Low vibration screening machine for flour screening is manufactured and sold by Xinxiang Dayong vibration equipment Co., Ltd. for flour screening.The straight screen machine is low in height and more suitable for the limited space. The optimized double motor balance structure is adopted to make the material movement track adjustable.
The rotary vibrating screen is manufactured and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd. It has many models and styles. The thin vibrating screen can be used for screening crystalline sugar in the food industry.Material on the center of the screen machine directly emissions down without resistance, which makes it easy to combine with production line.
Tamizador rotap is manufactured and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd. It is used for screening all kinds of materials and used in all walks of life. It can be used as a screening machine for screening wood chips.The rotary vibrating screen has no mechanical action and is easy to maintain. It can be used in single or multi layers. The contact part is made of stainless steel and can be customized according to the characteristics of materials.
The rotary vibrating screen is a kind of gravel screening machine specially used for mining vibrating screen manufactured and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd.Single layer rotary vibrating screen adopts unique grid design. The screen can be used for a long time. It is convenient to replace the screen. It only takes 3-5 minutes. It is easy to operate, easy to clean and convenient.
Xinxiang Dayong Vibrating Equipment Co., Ltd. is the most popular mud vibrating screen manufacturer in China. The rotary vibrating screen produced and sold by Dayong company can be used for industrial mud screening, with high screening efficiency, fine screening, low noise and simple operation.
Tamizador rotap is manufactured and sold by Xinxiang Dayong company, which is specially used for screening various materials, including tamizador rotap / vibrating screen for food industry.The tamizador rotap is efficient, beautiful and durable, and suitable for any powder, particle and viscous liquid.
The tamizador rotap used in China hot feed additive vibrating rotary screen / powder screening machine is produced and sold by Xinxiang Dayong company, which can be used for screening feed additives and other materials.The rotary vibrating screen has the advantages of small volume, light weight and space saving. The direction of the discharge port can be adjusted, and the coarse and fine materials can be discharged automatically.
Ultrasonic vibrating screen is a kind of ultra-fine powder material produced and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd., which is specially used in the food industry. It can screen corn flour and other powder materials.This series of screening machines solve the screening problems of strong adsorption, easy agglomeration, high static electricity, high precision, high density and light specific gravity, and have excellent performance.
Industrial single-layer cocoa powder / calcium gluconate ultrasonic vibrating screen is a kind of precision screening equipment specially used in food industry, which is produced and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd. It can screen cocoa powder, glucose powder and other powder materials. Ultrasonic vibrating screen is a kind of equipment which combines rotary vibrating screen with ultrasonic device. It has high screening accuracy and high efficiency.
Industrial large capacity Stainless Steel Ultrasonic gypsum powder classification vibrating screen machine is produced and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd., which is used for industrial screening.When the material on the screen is subject to low-frequency three-dimensional vibration and superimposed with ultrasonic vibration, it can not only prevent mesh clogging, but also improve the screening yield and quality.
The tamizador rotap is made of stainless steel, which is specially used for powder screening in various industries. The operation is simple and convenient, at the same time, it can save labor, and has the function of automatic cleaning. It is a good helper for screening powder materials.
The tamizador rotap is produced by Xinxiang Dayong company, which is specially used for screening various materials, especially powder. The tamizador rotap is generally used for 1 to 3 layers. The number of layers and size of the screen machine, as well as the mesh size, are selected according to the screened materials.
Vertical vibration motor drive can automatically clean metal powder tamizador rotap machine is produced and sold by Xinxiang big use vibration equipment Co., Ltd. and can be used for screening metal powder.The contact area oftamizador rotap is easy to assemble and mirror polished. 304 or 316 stainless steel is mostly used. The noise is lower than 75db.
Tamizador rotap is a kind of tamizador rotap/ vibrating screen machine specially used for manufacturing industrial self-cleaning sand produced and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd.Thetamizador rotap has the advantages of high screening efficiency, low operation cost, and the use of sub grid structure makes it convenient to replace the grid.
The tamizador rotap is a special rotary vibrating screen for screening small granule medicinal tea produced and sold by Xinxiang Dayong Vibrating Equipment Co., Ltd.The tamizador rotap supporting frame mesh can support the screen mesh, to keep the screen mesh longer life, and reduce the consumptive material use of net, silt, widely used in food, chemical, pharmaceutical and other industries.
A vibrating screen is a machine made with a screening surface vibrated precisely at high speeds. It is utilized particularly for screening mineral, coal, or other fine dry materials. The screening execution is influenced essentially by different factors, for example, hardware limit and point of inclination, in which the performance can estimate by screening effectiveness and flux of the item. While this type of machine is doesnt use for DIY purposes, you may require this for industrial purposes. It is especially essential in the mineral processing industry. If you are considering buying one, check out this article and learn which vibrating screen machine may be perfect for you and your project.
Twofold vibrating engines drive a linear vibrating screen. At the point when the two vibrating engines are turning synchronously, and contrarily, the excitation power creates by the whimsical square counterbalances each other toward the path corresponding to the pivot of the engine. Then, it covers into a resultant power toward the path opposite to the hub of the engine. So, the movement becomes a straight line.
The elliptical vibrating screen is a vibrating screen with an elliptical movement track, which has the upsides of high proficiency, high screening precision, and a wide scope of use. Contrasted with the conventional strainer machine of similar detail, it has a bigger handling limit and higher screening productivity.
A circular vibrating screen is another sort of vibrating screen with a multi-layer screen and high proficiency. As per the kind of materials and the prerequisites of clients, you can use its multiple screening plates. it were introduced in the seat type. The alteration of the screen surface edge can acknowledge by changing the position and tallness of the spring support. This screen is used for mining, building materials, transportation, energy, chemical industry.
The working surface of the roller screen is made out of a progression of moving shafts that masterminded on a level plane, on which there are many screen plates. When working, the fine material goes through the hole between the roller or the screen plate. In this way, enormous squares of materials are driven by rollers, moving to the closures and releasing from the outlets. Roller screens are usually widely used in the conventional coal industry.
High frequency vibrating screen is likewise called a high-frequency screen for short. High frequency vibrating screen is made out of exciter, screen outline, supporting, suspension spring and screen, and so on. This type of vibrating screen is the most significant screening machine in the mineral preparing industry, which is reasonable for totally wet or dry crude materials.
Rotary vibrating screen principally utilize for the grouping of materials with high screening effectiveness and fine screening precision. It features a completely shut structure, no flying powder, no spillage of fluid, no obstructing of work, programmed release, no material stockpiling in the machine, no dead point of matrix structure, expanded screen territory, etc. Any molecule, powder, and bodily fluid can screen inside its specific range. The machine usually used for characterization, arrangement, and filtration in nourishment, substance, metal, mining, and some other ventures.
Horizontal screen has the benefits of both slanted screen and straight vibrating screen. The machine has the highlights of good screen penetrability, enormous handling limit, and small installed height. The establishment point of the regular vibrating screen is 15-30, while the establishment of a flat screen is corresponding to the ground, or somewhat slanted 0-5.
Heavy inclined screen can apply to the treatment of debris from the quarry, mine, and building destruction. It can also utilize in the treatment of topsoil, the reusing of development materials, the screening of rock, the screening of gravel and aggregates, etc.
Grizzly screen regularly utilizes for pre-screening before coarse and medium pulverizing of materials. The work size is by and large>50mm, yet some of the time <25mm. This machines productivity is low, but screen efficiency is not that high. Also, quite often, the mesh tends to get a block.
The banana screen has a screen plate with various areas and diverse plunge edges. The longitudinal segment is a broken line, while the entire screen resembles a banana shape. The banana screen is, for the most part, appropriate for the arrangement of huge and medium-sized materials with high substance of fine particles. It can likewise utilize for drying out and demoralization.
While you picking vibrating screens, the material qualities should consider, including the substance of material particles under the screen, the substance of troublesome screen particles, material dampness, the shape and explicit gravity of the material, and the substance of clay. Professional vibrating screens makers could give serious vibrating screen value, assorted variety redid vibrating screen models, auspicious after-deals administration, save parts, and can keep on offering types of assistance for clients entire creation circle.
A Dust-Tight Screening Feeder to a Secondary Crusher. It is 11 ft. (3.2 m) wide, 40 ft. (12.2 m) long and 48 (1.2 m) deep. Rated 2000 TPH of Limestone that screens the less than 6 rock, it consumes 45 hp (34 kW).
The adaptation of the patented Kinergy Drive System to Vibrating Screens is recognized as the most significant advancement in Vibrating Screens in more than 60 years! For the first time in their long history, Vibrating Screens have the most operating versatility and Energy Efficiency.
One of the reasons for this proclamation is the full range of electrical adjustment enables all these Vibrating Screens to also perform as a Feeder. The operating versatility enables sticky (adhesive) bulk solids to be screened by utilizing the automatic and repetitive pulsing kind of vibratory action.
Another is these Vibrating Screens make use of Kinergys drive technology to incorporate an underside collecting pan for the passed unders. Thus, the steep walled collecting hopper is eliminated. That reduces the height of the building or the screening tower; thereby reducing the costs of construction and added operating expense.
Kinergys linear stroke Screens allow the unit to be placed horizontally or on a shallow decline; whereas, Screens with a circular or elliptical type of vibratory motion are often required to be declined 20 for the force of gravity to assist in the needed conveying.
Kinergy Vibrating Screens are the most Energy Efficient, require minimal maintenance, operate quietly and have an electrically adjustable stroke and operating frequency. All of these features combine to ensure the best performance level.
Cleaning Unit Pieces: These single-screening deck units rely on vibration to remove clinging particles, trim edges, or anything similar from unit pieces. Example: Cleaning the various types of briquettes, pressed logs, dried pellets, or shaking off adhered sand from metal castings.
Washing: A bulk solid or unit piece can be washed while its being conveyed by mounting rows of liquid sprays directly over the screen. The liquid spray can be water, oil, liquid detergent, a chemical solution, etc.
Removing Undersize: This is also known as de-dusting, fines removal or shaking out the small size. Grading: This method is a close particle to particle or particle from slivers type of separation. As the most demanding of the sizing functions, multiple screening decks will be required.
Lowering Height: Kinergys Vibrating Screens can be installed horizontally or on a slight decline which reduces the height of the needed building or screening tower. Construction cost is reduced and the daily operating expense is less because of the lower elevation.
Energy Efficiency: All the Screens utilize the Kinergy Drive System, which is the most versatile and energy efficient drive available. This drive is a combination of a free force input from an A.C. type electric motor with the output of sub-resonant tuned springs. When the applied load increases, the springs inherently drive harder. It maximizes the use of Kinergy which is defined as the kinetic energy developed by a springs motion during the drive portion of its cycle. Thus, a 50 to 65% power reduction can be achieved.
Dust-Tight Construction: Kinergy Vibrating Screens are environmentally friendly. They can be made with dust-tight bodies that have a bolted top cover with quick opening viewports to observe the screening.
Bottom Drive Design: The Kinergy Vibratory Drive System is preferred to be located underneath the Screen body. The added bottom conveying pan for collecting the passed unders enables it most access to the screening decks. It is easier for dust-tight construction and it eliminates the need for the previously used steep walled collecting hopper located underneath.
Top Drive Design: The drive system is located above the Screen body. Typically the underside of the screening unit is completely open to permit the discharge of the unders across its width and length. If it is needed, a full length unders conveying trough can be supplied which makes the unit more readily adaptable to being dust-tight.
Operating Versatility: The operating stroke and frequency is electrically adjustable. This enables the Vibrating Screens to be automatically and repetitively Pulsed with a more vigorous vibratory action. This helps to minimize blinding of the screen media and to minimize particle adhesion.
Larger Dimensions: Kinergy Vibrating Screens can be manufactured in larger dimensions. Since the input dynamic forces are distributed, the diameter or length and width dimensions are not restricted as they would be if they were concentrated at one point. This is the reason Kinergy Driven Vibrating Screens that are unidirectional are standardized in widths to 18 ft. and lengths as required.
Minimal Maintenance: Two specific design features make Kinergy Vibrating Screens a low maintenance option. First, using components specifically designed to endure the vibratory action, the maintenance requirements decrease remarkably. Second, three components make up the drive system. These components can be changed in less than one hour by two reasonably skilled technicians. No qualified journeymen are required.
Performing as a Feeder: All Kinergy Vibrating Screens can also perform the feeding function. Install the Kinergy Vibrating Screen under the outlet of the Bin or Silo. Use the electrical control to adjust the Screening units output from zero to the maximum TPH.
Common Components: Kinergy Vibrating Screens minimize the amount of spare parts kept in stock. Most of the component parts are interchangeable with other Kinergy Driven units even though their functions may differ. These common components extend to Kinergy Vibrating Feeders, Conveyors, Fluid Bed Coolers and Dryers, Spiral Elevators and the various types of Foundry units. This reduces the number of spare parts required in inventory.
Kinergy engineers have been industry leaders in the field of Vibratory Screens for over thirty years. To learn more about Kinergys Vibrating Screens, please call today at 502.366.5685 or download Kinergys descriptive Bulletin KDVS-1 entitled Kinergy Driven Vibrating Screens.
Realizing vibrations can be very destructive, Engineers seldom considered intentionally creating vibrations in a machine to perform a beneficial function. Even so, over the years and by taking advantage of the principle of Natural Frequency, these purposely vibrated machines have been gradually but steadily improved. Thus, these Electro-Mechanical Machines now have more Electrical Operating Versatility and are ranked among the most Energy Efficient available. This history and the progressive evolution are explained in the Booklet entitled Introducing Vibratory Machines for Material Handling. The booklet is intended to be educational and is available upon request.