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Crusher, also known as the crusher. It is a crushing machine used in the processing of metallic ore and non-metallic ore that can break the mined raw ore into small pieces by extrusion and bending.

Jaw crusher is the use of two jaw plate extrusion and bending of materials, coarse or medium crushing of various hardness of materials crushing machinery. The crushing mechanism is composed of a fixed jaw plate and a movable jaw plate. When the two jaw plates are near, the material is broken, and when the two jaw plates leave, the material block smaller than the discharge port is discharged from the bottom. Its breaking action is intermittent. This kind of crusher is widely used in mineral processing, building materials, silicate and ceramics industry because of its advantages of simple structure, reliable work and crushing hard materials.

Rotary crusher with two ways to achieve the adjustment of the discharge port and overload insurance: first, the mechanical way, the upper end of the main shaft has an adjustment nut, rotary adjustment nut, crushing cone can fall or rise, so that the discharge port will become larger or smaller, overload, by cutting off the drive pulley on the safety pin to achieve insurance; The second is the hydraulic rotary crusher, the main shaft is located on the plunger in the hydraulic cylinder, changing the volume of hydraulic oil under the plunger can change the upper and lower position of the crushing cone, thus changing the size of the discharge port. When overloaded, the downward pressure of the spindle increases, forcing the hydraulic oil under the plunger to enter the accumulator in the hydraulic transmission system, so that the crushing cone is lowered to increase the discharge port, and the non-crushing material (iron, wood, etc.) that enters the crushing chamber with the material is discharged to achieve safety.

The working principle of the cone crusher is the same as that of the rotary crusher, but it is only suitable for crushing machinery in medium or fine crushing operations. The uniformity of the discharge particle size of the medium and fine crushing operation is generally higher than that of the coarse crushing operation, so a parallel zone must be set in the lower part of the crushing chamber, and the rotation speed of the crushing cone must be accelerated so that the material is squeezed more than once in the parallel zone.

Roller crusher is a machine that uses the friction of the roller surface to bite the material into the crushing area, so that it can withstand extrusion or splitting and break. When used for coarse crushing or when it is necessary to increase the crushing ratio, teeth or grooves are often made on the roll surface to increase the splitting effect. Roller crusher is usually divided into single roll, double roll and multi-roll crusher according to the number of rollers, suitable for coarse, medium or fine crushed coal, limestone, cement clinker and feldspar and other medium hard materials.

The hammer crusher has the advantages of large crushing ratio, uniform discharge particle size, less overpulverized material and low energy consumption. However, due to the rapid wear of hammer head, the application of hard material crushing is limited; In addition, because the grate is afraid of blocking, it is not suitable for crushing materials with high humidity and clay. This crusher is usually used to break limestone, shale, coal, gypsum, chalk and other medium hard below the brittle materials.

Impact crusher is a machine that uses the high-speed impact of the plate hammer and the rebound effect of the counter plate to break the material by repeated impact. The plate hammer is fixed on a high-speed rotating rotor, and several counterattack plates are arranged along the crushing chamber at different angles.

When the material enters the action zone of the plate hammer, it is first impacted by the plate hammer and broken for the first time, and at the same time, it gains kinetic energy and rushes to the counter plate at high speed. After the material collides with the impact plate and breaks again, it is bounced back to the action area of the plate hammer and is impacted by the plate hammer again. This is repeated until it is broken into the desired particle size and discharged out of the machine.

Compared with the hammer crusher, the impact crusher has a larger crushing ratio and can make full use of the high-speed impact energy of the entire rotor. However, because the plate hammer is very easy to wear, its application in the crushing of hard materials is also limited, usually used for coarse, medium or fine crushed limestone, coal, calcium carbide, quartz, dolomite, sulfide iron ore, gypsum and chemical raw materials and other medium hard below the brittle materials.

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