A vibrating screen is a necessary machine for mining and quarrying industries. In the quarrying field, the screening process always follows the primary and secondary crushing stages to divide rock material into more than three sizes from coarse to fine.
Actually, how many sizes of material do you want to get depends on how many screen decks you adding to the machine, which greatly improves the value of raw material. Besides, the vibrating screen also plays a key role in the ore mining industry where ore beneficiation process has strict requirements on the size of ore. For example, before entering a ball grinding mill, ores must get their size meet a ball mill opening size, and be not containing impurities with the help of a vibrating screen.
The working principle of a vibratory screen is quite simple, which makes it easy to operate. The crucial parts of the machine include vibrating screens, exciter, motor, screen decks, liners, and side plates.
Vibrating source comes from an exciter that transmits vibration to the screen deck by the V-belt, which makes material shaking and distributing evenly on the screen. During the process, the large size of material will stay on the top while the small and fine size material can go throughout the screen mesh to the bottom, then youll get different sizes of materials.
The vibration of screen is generated by an exciter which consists of housing, bearing, shaft and an eccentric mass. In-deep speaking, the motor passing the driving force to exciter by V-belt, and then eccentric mass rotating around the exciter shaft to create vibration.
The screening and frequency can be adjusted by changing the ratio of the V-belt sheaves. The high-quality exciter can performance a force output of 1000 KN, keeping excellent operational performance and economic efficiency.
The task of the balance wheel is to ensure centrifugal forces evenly distributing around the axis of rotation, otherwise, the unbalanced cause the pulley to vibrate thus leading to premature or even catastrophic failure.
An inclined vibrating screen is one of the most popular screening machines. The inclination of this type of screen is at the range of 15 to 30 degrees. Screening stroke can be adjusted by remove or add eccentric mass and is generally at 8mm to 12mm.
The inclined screen utilizes gravity to help material move downward. Besides, the circular motion also helps to separate coarse and fine material. This type of vibrating screen is often applied in stone crushing, sand making, ore processing, construction waste recycling, wet screening, and chemical fields.
The inclination angle of the horizontal vibrating screen is between 0 degrees and 5 degrees, almost parallel to the ground. It is equipped with a triple drive mechanism that combines advantages of linear and circular vibration types in elliptic vibration.
The triple drive mechanism can keep material moving horizontally under the help of linear vibration while avoid them plunging because of the circular vibration. A horizontal screen has a simple structure, reliable performance, and large capacity, and can overcome any condition. So, it is the most practical vibrating screen in the quarrying field.
The outstanding feature of a high-frequency screen is high frequency and low amplitude, which ensures a faster material speed thus greatly improving screening efficiency. It is perfect for screening feeds containing solid and crushed ores down to approximately 200m in size.
It is mostly used in dehydration wet screening in which a filtering layer on the screen surface can block the passage of fine material thus reducing the loss of solid materials in water and improving the recovery rate of solid. It is applied for screening and separating iron ore, tin ore, tungsten, tantalum, and niobium, etc.
Fote is one of the leading manufacturers of high-quality vibrating screens. It mainly produces circular motion vibrating screens/inclined vibrating screens, horizontal vibrating screens, high-frequency vibrating screens, drum screens. If you have any needs, please consult our experienced screen engineers to obtain solutions and other information and suggestions.
As a leading mining machinery manufacturer and exporter in China, we are always here to provide you with high quality products and better services. Welcome to contact us through one of the following ways or visit our company and factories.
Based on the high quality and complete after-sales service, our products have been exported to more than 120 countries and regions. Fote Machinery has been the choice of more than 200,000 customers.
There are many types of vibrating screens, which can be divided into circular vibrating screens and linear screens according to the movement trajectory of materials. These two types are commonly used screening equipment. A few days ago, a customer left a message asking about the difference between them and wanted to know how to choose. Here we will make a comparison from 9 points to help customers quickly distinguish between circular vibrating screen and linear screen.
There is no essential difference between the style and structure of the circular vibrating screen and the linear vibrating screen. The materials are screened through the vibration of the screen surface, but the difference in the vibration track will directly affect the screening purpose.
The motor drives the eccentric block of the vibration exciter to rotate at a high speed through the V-belt, which produces a large centrifugal inertial force, which stimulates the screen box to produce a circular motion with a certain amplitude. The material on the screen is affected by the impulse transmitted by the screen box on the inclined screen surface. A continuous throwing motion is produced, and the particles smaller than the sieve hole are passed through the sieve when the material meets the screen surface, thereby achieving classification.
Vibration motor is used as the source of vibration, so that the material is thrown up on the screen while moving forward in a straight line. The material enters the inlet of the screening machine evenly from the feeder and produces several specifications of screens through the multi-layer screen. The upper and lower objects are discharged from their respective outlets.
2. Vibration exciterThe circular vibrating screen is also called a single-shaft vibrating screen because the exciter is a shaft and uses an inertial motor to work. The linear vibrating screen is composed of two shafts and works on the principle of vibration motor excitation, so it is also called double Shaft vibrating screen.
3. Hole blocking phenomenonThe material of the circular vibrating screen moves in a parabolic circular trajectory on the screen surface, so that the material is dispersed as much as possible, thereby improving the bounce force of the material, and the material stuck in the screen hole can also jump out, reducing the hole blocking phenomenon.
5. Screen surface inclinationAccording to the particle size of the material, the circular vibrating screen can change the inclination of the screen surface, thereby changing the moving speed of the material along the screen surface and increasing the processing capacity of the screen machine. Generally speaking, the inclination angle of the screen surface of the linear vibrating screen in production is small.
6. MaterialUnder normal circumstances, the circular vibrating screen is made of thick plates, and the box is made of manganese steel to resist the impact of materials during the screening process. The materials for the production of linear vibrating screens are mainly light plates or stainless steel plates.
7. Applicable fieldsThe circular vibrating screen mainly screens materials with high specific gravity, large particles and high hardness, and is widely used in mining industries such as mines, coal, and quarries.
Linear screens mainly screen fine particles, light specific gravity, and low-hardness materials, mainly dry powder, fine granular or micro-powder materials, and are generally used in food, chemical, building materials, and pharmaceutical industries.
8. Processing capacityFor the circular vibrating screen, because the exciter is arranged above the center of gravity of the screen box, the elliptical long axis at both ends of the screen box is in a lower eight shape, and the upper end of the elliptical long axis at the feeding end faces the discharge direction, which is beneficial to the rapid material The upper end of the elliptical long axis of the discharge end is opposite to the discharge direction, which reduces the movement speed of the material, which is conducive to the penetration of difficult-to-screen materials, and the arc-shaped screen surface increases the effective area of the screen, thereby improving its Processing power.
In addition, for materials that are difficult to screen, the circular vibrating screen can turn the main shaft, so that the direction of vibration is opposite to the direction of movement of the material, and the moving speed of the material along the screen surface is reduced (when the screen surface inclination is the same as the spindle speed) to improve screening effectiveness.
In the field of mining and quarrying, circular vibrating screens are more widely used. In actual production, the choice of circular vibrating screen or linear vibrating screen mainly depends on the type of material handled by the user and the application field. The screening requirements are different, the selected equipment will be different.
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.