working principle of crusher

working principle of impact crusher

working principle of impact crusher

Impact Crusher is Yifan machinery in absorbing domestic and foreign advanced technology, combined with the sand industry specific mining conditions and the latest generation of counter - developed crusher. It adopts the latest manufacturing technology, unique structure design, processing products were cube, no tension and fracture, grain shape is quite good, all can break the feed size of not more than 500mm, the compressive strength of more than 350MPa thick, fine materials ( granite, limestone, cement and so on), widely used in all kinds of ores crushing, railway, highway, energy, cement, chemical, construction and other industries. The row partical size can be adjusted, crushing specification diversification.

(see Figure Impact Crusher 1 ) crusher working principle diagram for a typical counter. Broken material crusher, material is suspended by the plate hammer impact. If the particle size is smaller, the impact force is approximated by a particle of gravity, material along the tangent direction (see Figure Impact Crusher 1 ) by dotted lines ) throw. If the particle size is larger, the material out of the rotation is generated, thrown in the direction V angle and tangent direction, in order to make the material block, deep plate hammer ring reduced rotation, to the lower part of the slide to bend downward (see Figure Impact Crusher 1 ).

Double rotor impact crusher has two rotor mounted in parallel, separate from the motor with two rotors to rotate in the opposite direction of movement ( also in-phase rotation ) material is broken. The process of material crusher impact crusher ( see Figure Impact Crusher 2 ).

Impact Crusher is a broken machine which use of impact energy to crushing material. When the machine works, under the driving of the motor, the rotor high-speed rotation, the material into the plate hammer function area, and the impact of the rotor plate hammer crusher, and then be thrown to counterattack device broken again, then from the back lining board to board hammer region to break, this process is repeated, material from large to small in one or two, three, back cavity repeated broken, until the materials are crushed to the required size, discharged from the discharge port. Adjust the back frame and the clearance between rotor can be achieved by changing the material discharging size and shape of the material for the purpose of.

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jaw crusher working principle

jaw crusher working principle

A sectional view of the single-toggle type of jaw crusher is shown below.In one respect, the working principle and application of this machine are similar to all types of rock crushers, the movable jaw has its maximum movement at the top of the crushing chamber, and minimum movement at the discharge point. The motion is, however, a more complex one than the Dodge motion, being the resultant of the circular motion of the eccentric shaft at the top of the swing jaw. combined with the rocking action of the inclined toggle plate at the bottom of this jaw. The motion at the receiving opening is elliptical; at the discharge opening, it is a thin crescent, whose chord is inclined upwardly toward the stationary jaw. Thus, at all points in the crushing chamber, the motion has both, vertical and horizontal, components.

It will be noted that the motion is a rocking one. When the swing jaw is rising, it is opening, at the top, during the first half of the stroke, and closing during the second half, whereas the bottom of the jaw is closing during the entire up-stroke. A reversal of this motion occurs during the downstroke of the eccentric.

The horizontal component of motion (throw) at the discharge point of the single-toggle jaw crusher is greater than the throw of the Dodge crusher at that point; in fact, it is about three-fourths that of Blake machines of similar short-side receiving-opening dimensions. The combination of favorable crushing angle, and nonchoking jaw plates, used in this machine, promotes a much freer action through the choke zone than that in the Dodge crusher. Capacities compare very favorably with comparable sizes of the Blake machine with non-choking plates, and permissible discharge settings are finer. A table of ratings is given.

The single-toggle type jaw crusher has been developed extensively. Because of its simplicity, lightweight, moderate cost, and good capacity, it has found quite a wide field of application in portable crushing rigs. It also fits into the small, single-stage mining operation much better than the slower Dodge type. Some years since this type was developed with very wide openings for reduction crushing applications, but it was not able to seriously challenge the gyratory in this field, especially when the high-speed modern versions of the latter type were introduced.

Due to the pronounced vertical components of motion in the single-toggle machine, it is obvious that a wiping action takes place during the closing strokes; either, the swing jaw must slip on the material, or the material must slip along the stationary jaw. It is inevitable that such action should result in accelerated wear of the jaw plates; consequently, the single-toggle crusher is not an economical machine for reducing highly abrasive, or very hard, tough rock. Moreover, the large motion at the receiving opening greatly accentuates shocks incidental to handling the latter class of material, and the full impact of these shocks must be absorbed by the bearings in the top of the swing jaw.

The single-toggle machine, like the Dodge type, is capable of making a high ratio-of-reduction, a faculty which enables it to perform a single-stage reduction of hand-loaded, mine run ore to a suitable ball mill, or rod mill, feed.

Within the limits of its capacity, and size of receiving openings, it is admirably suited for such operations. Small gravel plant operations are also suited to this type of crusher, although it should not be used where the gravel deposit contains extremely hard boulders. The crusher is easy to adjust, and, in common with most machines of the jaw type, is a simple crusher to maintain.

As rock particles are compressed between the inclined faces of the mantle and concaves there is a tendency for them to slip upward. Slippage occurs in all crushers, even in ideal conditions. Only the particles weight and the friction between it and the crusher surfaces counteract this tendency. In particular, very hard rock tends to slip upward rather than break. Choke feeding this kind of material can overload the motor, leaving no option but to regulate the feed. Smaller particles, which weigh less, and harder particles, which are more resistant to breakage, will tend to slip more. Anything that reduces friction, such as spray water or feed moisture, will promote slippage.

Leading is a technique for measuring the gap between fixed and moveable jaws. The procedure is performed while the crusher is running empty. A lead plug is lowered on a lanyard to the choke point, then removed and measured to find out how much thickness remains after the crusher has compressed it. This measures the closed side setting. The open side setting is equal to this measurement plus the throw of the mantle. The minimum safe closed side setting depends on:

Blake (Double Toggle) Originally the standard jaw crusher used for primary and secondary crushing of hard, tough abrasive rocks. Also for sticky feeds. Relatively coarse slabby product, with minimum fines.

Overhead Pivot (Double Toggle) Similar applications to Blake. Overhead pivot; reduces rubbing on crusher faces, reduces choking, allows higher speeds and therefore higher capacities. Energy efficiency higher because jaw and charge not lifted during cycle.

Overhead Eccentric (Single Toggle) Originally restricted to sampler sizes by structural limitations. Now in the same size of Blake which it has tended to supersede, because overhead eccentric encourages feed and discharge, allowing higher speeds and capacity, but with higher wear and more attrition breakage and slightly lower energy efficiency. In addition as compared to an equivalent double toggle, they are cheaper and take up less floor space.

Since the jaw crusher was pioneered by Eli Whitney Blake in the 2nd quarter of the 1800s, many have twisted the Patent and come up with other types of jaw crushers in hopes of crushing rocks and stones more effectively. Those other types of jaw crusher inventors having given birth to 3 groups:

Heavy-duty crushing applications of hard-to-break, high Work Index rocks do prefer double-toggle jaw crushers as they are heavier in fabrication. A double-toggle jaw crusher outweighs the single-toggle by a factor of 2X and well as costs more in capital for the same duty. To perform its trade-off evaluation, the engineering and design firm will analyze technical factors such as:

1. Proper selection of the jaws. 2. Proper feed gradation. 3. Controlled feed rate. 4. Sufficient feeder capacity and width. 5. Adequate crusher discharge area. 6. Discharge conveyor sized to convey maximum crusher capacity.

Although the image below is of a single-toggle, it illustrates the shims used to make minor setting changes are made to the crusher by adding or removing them in the small space between the crushers mainframe and the rea toggle block.

The jaw crusher discharge opening is the distance from the valley between corrugations on one jaw to the top of the mating corrugation on the other jaw. The crusher discharge opening governs the size of finished material produced by the crusher.

Crusher must be adjusted when empty and stopped. Never close crusher discharge opening to less than minimum opening. Closing crusher opening to less than recommended will reduce the capacity of crusher and cause premature failure of shaft and bearing assembly.

To compensate for wear on toggle plate, toggle seat, pitman toggle seat, and jaws additional shims must be inserted to maintain the same crusher opening. The setting adjustment system is designed to compensate for jaw plate wear and to change the CSS (closed side setting) of the jaw crusher. The setting adjustment system is built into the back frame end.

Here also the toggle is kept in place by a compression spring. Large CSS adjustments are made to the jaw crusher by modifying the length of the toggle. Again, shims allow for minor gap adjustments as they are inserted between the mainframe and the toggle block.

is done considering the maximum rock-lump or large stone expected to be crushed and also includes the TPH tonnage rate needing to be crushed. In sizing, we not that jaw crushers will only have around 75% availability and extra sizing should permit this downtime.

As a rule, the maximum stone-lump dimension need not exceed 80% of the jaw crushers gape. For intense, a 59 x 79 machine should not see rocks larger than 80 x 59/100 = 47 or 1.2 meters across. Miners being miners, it is a certainty during day-to-day operation, the crusher will see oversized ore but is should be fine and pass-thru if no bridging takes place.

It will be seen that the pitman (226) is suspended from an eccentric on the flywheel shaft and consequently moves up and down as the latter revolves, forcing the toggle plates outwards at each revolution. The seating (234) of the rear toggle plate (239) is fixed to the crusher frame; the bottom of the swing jaw (214) is therefore pushed forward each time the pitman rises, a tension rod (245) fitted with a spring (247) being used to bring it back as the pitman falls. Thus at each revolution of the flywheel the movable jaw crushes any lump of ore once against the stationary jaw (212) allowing it to fall as it swings back on the return half-stroke until eventually the pieces have been broken small enough to drop out. It follows that the size to which the ore is crushed.

The jaw crusher is not so efficient a machine as the gyratory crusher described in the next paragraph, the chief reason for this being that its crushing action is confined to the forward stroke of the jaw only, whereas the gyratory crusher does useful work during the whole of its revolution. In addition, the jaw crusher cannot be choke-fed, as can the other machine, with the result that it is difficult to keep it working at its full capacity that is, at maximum efficiency.

Tables 5 and 6 give particulars of different sizes of jaw crushers. The capacity figures are based on ore weighing 100 lb. per cubic foot; for a heavier ore, the figures should be increased in direct proportion to its weight in pounds per cubic foot.

The JAW crusher and the GYRATORY crusher have similarities that put them into the same class of crusher. They both have the same crushing speed, 100 to 200 R.P.M. They both break the ore by compression force. And lastly, they both are able to crush the same size of ore.

In spite of their similarities, each crusher design has its own limitations and advantages that differ from the other one. A Gyratory crusher can be fed from two sides and is able to handle ore that tends to slab. Its design allows a higher-speed motor with a higher reduction ratio between the motor and the crushing surface. This means a dollar saving in energy costs.

A Jaw crusher on the other hand requires an Ely wheel to store energy. The box frame construction of this type of crusher also allows it to handle tougher ore. This design restricts the feeding of the crusher to one side only.

The ore enters from the top and the swing jaw squeezes it against the stationary jaw until it breaks. The broken ore then falls through the crusher to be taken away by a conveyor that is under the crusher.Although the jaws do the work, the real heart of this crusher is the TOGGLE PLATES, the PITMAN, and the PLY WHEEL.

These jaw crushers are ideal forsmall properties and they are of the high capacity forced feed design.On this first Forced Feed Jaw Crusher, the mainframe and bumper are cast of special alloy iron and the initial cost is low. The frame is ribbed both vertically and horizontally to give maximum strength with minimum weight. The bumper is ruggedly constructed to withstand tremendous shock loads. Steel bumper can be furnished if desired. The side bearings are bronze; the bumper bearings are of the antifriction type.

This bearing arrangement adds both strength and ease of movement. The jaw plates and cheek plates are reversible and are of the best-grade manganese steel. The jaw opening is controlled by the position of an adjustable wedge block. The crusher is usually driven by a V-to-V belt drive, but it can be arranged for either V-to-flat or fiat belt drive. The 8x10 size utilizes a split frame and maybe packed for muleback transportation. Cast steel frames can be furnished to obtain maximum durability.

This second type of forced feed rock crusher is similar in design to the Type H listed above except for having a frame and bumper made of cast steel. This steel construction makes the unit lighter per unit of size and adds considerable strength. The bearings are all of the special design; they are bronze and will stand continuous service without any danger of failure. The jaw and cheek plates are manganese steel; and are completely reversible, thus adding to their wearing life. The jaw opening is controlled by the position of an adjustable wedge block. The crushers are usually driven by V-to-V but can be arranged for V-to-flat and belt drive. The 5x6 size and the 8x10 size can be made with sectionalized frame for muleback transportation. This crusher is ideal for strenuous conditions. Consider a multi jaw crusher.

Some jaw crushers are on-floor, some aboveground, and others underground. This in many countries, and crushing many kinds of ore. The Traylor Bulldog Jaw crusher has enjoyed world wide esteem as a hard-working, profit-producing, full-proof, and trouble-free breaker since the day of its introduction, nearly twenty years ago. To be modern and get the most out of your crushing dollars, youll need the Building breaker. Wed value the privilege of telling you why by letter, through our bulletins, or in person. Write us now today -for a Blake crusher with curved jaw plates that crush finer and step up production.

When a machine has such a reputation for excellence that buyers have confidence in its ability to justify its purchase, IT MUST BE GOOD! Take the Type G Traylor Jaw Crusher, for instance. The engineers and operators of many great mining companies know from satisfying experience that this machine delivers a full measure of service and yields extra profits. So they specify it in full confidence and the purchase is made without the usual reluctance to lay out good money for a new machine.

The success of the Type G Traylor Jaw Crusheris due to several characteristics. It is (1) STRONG almost to superfluity, being built of steel throughout; it is (2) FOOL-PROOF, being provided with our patented Safety Device which prevents breakage due to tramp iron or other causes of jamming; it is (3) ECONOMICAL to operate and maintain, being fitted with our well-known patented Bulldog Pitman and Toggle System, which saves power and wear by minimizing frictionpower that is employed to deliver increased production; it is (4) CONVENIENT to transport and erect in crowded or not easily accessible locations because it is sectionalized to meet highly restrictive conditions.

Whenever mining men need a crusher that is thoroughly reliable and big producer (which is of all time) they almost invariably think first of a Traylor Type G Jaw Crusher. By experience, they know that this machine has built into it the four essentials to satisfaction and profit- strength, foolproofness, economy, and convenience.

Maximum STRENGTH lies in the liberal design and the steel of which crushers parts are made-cast steel frame, Swing Jaw, Pitman Cap and Toggles, steel Shafts and Pitman rods and manganese steel Jaw Plates and Cheek Plates. FOOLPROOFNESS is provided by our patented and time-tested safety Device which prevents breakage due to packing or tramp iron. ECONOMY is assured by our well-known Bulldog Pitman and Toggle System, which saves power and wear by minimizing friction, the power that is used to deliver greater productivity. CONVENIENCE in transportation and erection in crowded or not easily accessible locations is planned for in advance by sectionalisation to meet any restrictive conditions.

Many of the worlds greatest mining companies have standardized upon the Traylor Type G Jaw Crusher. Most of them have reordered, some of them several times. What this crusher is doing for them in the way of earning extra dollars through increased production and lowered costs, it will do for you! Investigate it closely. The more closely you do, the better youll like it.

working principle of crusher

working principle of crusher

Crushers, grinders, and pulverizers are grinding equipment used to convert or reduce coarse materials (such as stone, coal, or slag) into smaller and finer materials. Grinding equipment can be divided into two basic types: crushers and grinders. Industrial crushers are the first level of particle size reduction; further granulation occurs in the grinder or pulverizer.

The crusher reduces the material through the crusher and the crusher, and the crusher or the moving parts of the crusher will crush the material when the material is under pressure. The force applied during this process may be compression, shear, or impact. When the internal strain level reaches a critical level, the material ruptures. When a material breaks, it releases energy mainly as heat.

Industrial crushers crush or deform materials through impact or pressure, thereby reducing large pieces of rock, ore, or waste to a smaller size. During the primary crushing operation, the boulder size feed is reduced from 20 to 100 inches to the secondary crusher size of 1 to 20 inches or the ground feed size of 0.5 to 3 inches.

There are many different types of crushers with different designs and crushing processes. The correct choice depends on several factors, including the hardness of the material to be crushed, the grinding performance of the material, the moisture content, and the required reduction rate. The following table lists various crusher types and their general specifications and uses.

The cone crusher uses a rotating cone that rotates in the bowl in an eccentric manner to break the rock between the cone surface (called the sleeve) and the lining of the bowl of the crusher. The rotary crusher is very similar to the cone crusher, but the cone has a steeper slope and the bowl surface is concave. When the gap between the bowl lining and the mantle narrows, the rock is crushed between the mantle by the revolving cone.

The horizontal axis of the horizontal shaft impactors (HSI) rotates a heavy-duty rotor. The guide bar attached to the rotor throws the material to be crushed towards the anti-collision apron (or curtain) equipped with replaceable bushings. Using the principle of surface force, this impact will damage the material and reduce the production of the material.

The vertical shaft impactor (VSI) has a vertical axis and a closed rotor, which can rotate at high speed. There are two main types of VSI crushers, namely rock crushing (self-generating) crushers, and shoe anvils. The pit of the rock crusher is filled with the entire circumference of the rock-filled chamber. Shoe-type and anvil-type VSI crushers have composite metal alloy anvils, and their placement positions can maximize the impact of materials thrown to the fixed anvil by centrifugal force. The comparison with the cone crusher shows that the VSI crusher has higher energy efficiency and can produce more fine materials under the same working conditions and time range.

The jaw crusher uses mechanical pressure to force the material to move between two vertical jaws. The two jaws are fixed and the other is driven back and forth. As the material moves through the crusher, the gap between the two jaws narrows, thereby further reducing the size. Jaw crushers are heavy machinery that can be used for hard materials in mining or quarries.

working principle and features of hammer crusher - jennifer0972

working principle and features of hammer crusher - jennifer0972

Thehammer crusher,asimpact crusher,jaw crusherand vertical impact crusher,is widely used in the industry of mining, building materials, chemical industry, metallurgies and fodder. The Hammer Crusher can secondary and fine crush materials in middle or less than middle hardness such as barite, limestone, terrazzo, silica sandstone, coal, coke, gypsum, aluminum sulfate, slag, etc.The hammer crusher also named hammer mill. Hammer crusher is primarily used for crushing medium-hard or brittle supplies with hardness no more than 300Mpa and 15% moisture such as barite, limestone, terrazzo, silica sandstone, coal, coke, gypsum, aluminum sulfate, slag, salt, chalk, blocks, cement, brick, tile,and so on. Its the features of simple construction, massive crushing ratio, high creation efficiency, uniform particle dimension, and so on.hammer crusher can crush the feeded materials of graininess1100mm into much less than 20mm for one time, therefore the conventional ambigu phase or three phase crushing might be modified into one phase crushing so as simplify the procedure can be simplified flow, along with the equipment expense saved usage and other production costs decreased. The hammer crusher falls into reversible and non-reversible hammer crushers. Reversible hammer crusher with reversible rotor utilized for good crushing generally; non-reversible hammer crusher with non-reversible rotor utilised for intermediate crushing. Solitary phase hammer crusher is non-reversible. Normal hammer crusher consists of frame, rotor, grate bar, impact plate and adjustment unit; solitary hammer crusher is composed of body, rotor ,feeding roll, grate bar, hydraulic opening device and groundwork.

Thehammer crusheris among the main equipment for intermediate and good crushing of the brittle supplies with much less than intermediate ,for example limestone coal and also other utilized in metallurgy, developing material, chemical and drinking water power market, using a function of huge crushing ratio and also product graininess. And hammer crusher can crush materials with diverse sizes into equal particle, which favors the next process. The Pc hammer crusher(hammer mill) had been created for each dry and damp crushing of brittle, medium-hard supplies for your mining, cement, coal, metallurgic, development materials, street building, and petroleum & chemical industries.Features Of Hammer Crusher:1.simple in operating2. high in productivity3.very low investment cost.Working Principle Of Hammer CrusherThe electric motor drives the rotor, and the rotor moves and makes the hammer board rotate faster. The materials are crushed in the crusher by the rotated hammer board. The end products come out via the strips of the screen under the machine. The size of the granularity can be adjusted by changing the distances among the screen strips.

the roller crusher working principle and matters detailed introduction

the roller crusher working principle and matters detailed introduction

The roller crusher is suitable for metallurgy, building materials,refractory materials and other industrial sectors broken, higher hardness of the material. The series of roll crusher is mainly composed of the roller, the roller support bearings, compaction and adjusting device and driving unit and other parts. The adjustment of the discharging granularity: with a wedge or gasket between the two roller adjusting device, adjusting bolt, wedge at the top of the device when the adjusting bolt will wedge pulled up, wedge rolling activity to the top from the fixed wheel.

The working principle: The roll crusher will be broken material feeding the mouth fall between two rollers, extrusion, finished product material nature. When the weather is good or not broken, the roll crusher roller but by hydraulic cylinder or the role of the spring automatic, make the roll gap

increases, quality or broken down, so as to protect the machine from being damaged. Relative rotation of the two roll gap to a certain extent, change the gap, can maximum discharging granularity control products. Double roll crusher is the use of a pair of opposite rotating round roll, four roll crusher is to use two opposite rotating round roll crushing operations.

Used field The roll crusher (to roll crusher) applies to the cement, chemical, electric power, mining, metallurgy, building materials, refractory materials, coal and other industries of thick, brittle block material intermediate crushing, it into the grain-size, discharging granularity is adjustable, can fight pressure strength of 160 mpa or less materials

are broken. Especially in the coal industry, the use of native raw coal fragmentation, as long as after iron, removing impurity, without gangue removal, can be directly to broken, broken out of material, granularity and the crushing rate is low, thereby simplifying the coal preparationprocess, reduce the investment and production cost. Matters you should attention 1) You should enhance the work to iron ore. The broken content (qian primary content) fall into can damage between double roller crusher, as a result causes accident. So in front of the breaker shall be installed in addition to iron plant. 2) Viscous material easy to jam broken space, in the treatment of the jam fault should stop processing, not in the running for tong mine. 3) When dealing with material are too many contain large, attentionshould be paid to large ore is easy to from the crushing space to prevent injury or damage to the equipment. 4) After double roll crusher run a long time, due to the roll surface wear larger, cause fairly granular product, then pay attention to adjusting the row ore mouth or on equipment maintenance. 5) You also need enhance the inspection of the roll crusher equipment,the lubrication part of the equipment on time to go, keep equipment good lubrication condition.

working principle of crushers

working principle of crushers

On left is ashowing of the standard gyratory with straight concaves is a section through any vertical, radial plane in the crushing chamber of one of the intermediate sizes of the crusher. In order to understand the crushing action in such a chamber it is helpful to consider the process as though each step took place in an orderly, and ideal fashion. It is hardly necessary to add that the action never does take place in just that fashion; nevertheless the concept is fundamentally a correct one, and the average performance of the crusher follows the pattern so closely that it is possible to predict, within surprisingly close limits; what any particular design of crusher will do.

Letsstart out by visualizing the crushing chamber filled with a tractable material which will act just the way we want it to, with a head of material (choke-feed) above the receiving opening so that no unsurge of load will occur during the closing stroke of the crusher head. Now, consider any horizontal plane through this body of material as, for example, the plane at the receiving opening, represented by line O in the diagram. The crusher head is at the moment in the close-side position.

As the head recedes on its opening stroke, the body of material moves downward; until, at the end of the stroke, the plane has moved to position 1. Note that the length of line 1 from concave to open-side head position, is the same as that of line O from concave to close-side head position. On the next closing stroke line 1 is compressed by the amount of the bead movement at that level, and on the next opening stroke it moves down to position 2 and so on flown through the chamber, until it becomes short enough to pass through the open-side discharge setting.

We can just as readily visualize the process as being the movement of the trapezoidal areas enclosed by each adjacent pair of horizontal lines and the two crushing faces. Better still, we can consider it as the movement of annular volumes whose cross-sections are the areas just mentioned. This latter conception is essential in visualizing the action of non-choking concaves and crushing chambers.

In the diagram, the broken line through the centre of the crushing chamber is the line-of-mean-diameters of the compacted areas. When the profiles of both crushing facts are straight lines, as in the case under consideration, this mean-diameter line is also straight, and its slope depends upon the relative tapers of the head and concaves. When the line approximately parallels the centre-line of the crusher, which is also the case for the diagram we are examining, the theoretical action closely approximates that of the jaw crusher of similar cross-sectional proportions. Practically, however, the gyratory will have some advantage over the jaw, as regards freedom from choking, because the spider arms of the gyratory pre-vent a complete filling of the crushing chamber at the top. When the line slopes away from the crusher centre-line at its lower end the characteristics change quite definitely in favour of the gyratory, as will be seen.

A variable effort is required between the top and bottom of the chamber to crush particles. This may be understood by comparing the mantle and concaves to a nutcracker. Imagine the spider as the nutcrackers fulcrum point, and your hand as applying power similar to that applied by the eccentric at the base of the main-shaft. The closer to the fulcrum point that the nut is initially cracked, the less power you have to apply with your hand. In the same manner the crushing effort, and demand for power, becomes greater as the centre of gravity of the rock mass moves downward in the crusher.

Gyratory Crushers are heavy-duty machines run in open circuit (sometimes in conjunction with scalping screens or grizzlies). They handle dry run-of-mine feed material as large as 1 m. There are two main types of primary crushers-gyratory crushers and jaw crushers. Gyratory crushers are the most common for new operations.

Secondary crushers are lighter-duty and include cone crushers, roll crushers, and impact crushers. Generally, the feed to these machines will be less than 15 cm, and secondary crushing is usually done on dry feed. Cone crushers are similar to gyratory crushers, but differ in that the shorter spindle of the cone is not suspended but is supported from below by a universal bearing. Also, the bowl does not flare as in a gyratory crusher. Cone crushers are generally the preferred type of secondary crusher because of their high reduction ratios and low wear rates. However, impact crushers are used successfully for relatively nonabrasive materials such as coal and limestone. Frequently, size reduction with secondary crushers is accomplished in closed circuit with vibrating screens for size separation.

The gyratory crusher is used as a primary and secondary stage crusher. The cone crusher is used as a secondary, tertiary, and quaternary crusher. The action of a typical gyratory-type crusher is illustrated above. In gyratory crushers the crushing process comprises reduction by compression between two confining faces and a subsequent freeing movement during which the material settles by gravity until it is caught and subjected to further compression and again released. The particles are subjected to maximum breaking forces when they are on the side with the minimum gape.

Gyratory crushers work on a similar principle to jaw crushers but have a circular gap. Rock is compressed between a static conical bowl and a concave mantle which oscillates about the central axis. These are generally designed for primary crushing in large-scale rock crushing applications up to 6000 t/h. Typically a mining haul truck will empty its load into the gyratory crusher and reduce the feed with a top-size of up to a few meters down to below around 250 mm.

iron ore beneficiation processing,working principle of iron ore jaw crusher,iron ore machine for sale south africa | prominer (shanghai) mining technology co.,ltd

iron ore beneficiation processing,working principle of iron ore jaw crusher,iron ore machine for sale south africa | prominer (shanghai) mining technology co.,ltd

Iron ore is the main direction of iron. The quality of pure iron can be directly fed into the iron smelting furnace, and is related to the ore. The iron ore has a higher impurity content, and you need to process it before it can be put into production.

Iron ore beneficiation can be divided into three stages: crushing, grinding, and beneficiation. Reliable processing equipment can effectively reduce processing costs and improve economic benefits. Jaw crusher is a new type of iron ore crushing equipment. It is specially designed for the developed iron ore. It is stable in operation and has been widely used.

When working, iron ore enters the machine from the feed port, and the motor drives the big wheel throwing and eccentric shaft. The eccentric shaft is connected with the movable jaw. The claw will follow the eccentric shaft around a fixed jaw fixed on the crusher to make irregular movement and movement. The jaw and the fixed jaw are sometimes close, sometimes far. Close, squeeze and shear the iron ore, and generate a moving speed toward the discharge outlet; away from the iron ore, a vacant state, and under the action of gravity, the discharge, qualified materials, and unqualified materials are returned to the cavity and continue to break .

Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.

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