Coal crushing operations, there are two systems: open the broken system and closed-circuit crushing system, open circuit crushing system for the granularity of the broken product is not strictly required, or when broken chunks of the house broken system, also known as cycle broken system for broken product must be strictly guaranteed to less than the specified size, while the crusher itself can not meet this requirement. Closed-circuit crushing system, broken product to go through a sieve to check the coal sieve is returned to the crusher until the sieve so far. The Washery use of open circuit crushing system.
The jaw crusher is extruded and both bending, impact and grinding stripping the role of broken machinery. Simple pendulum jaw crusher and two types of compound pendulum jaw crusher. The advantages of the jaw crusher is reliable, competent hard materials broken. The disadvantage is that because of intermittent work, respect the nesting, so the low processing capacity; broken coal, pulverized coal compared with multi- roll crusher . The jaw crusher is applicable to the content of waste rock hard or yellow iron more than the raw coal crushing. Coal Preparation Plant, Hubei Crusher is mainly for medium and small.
　　 Roll Crusher is split pieces role-based, both impact and bending role in the crusher. Coal Preparation Plant, single-roll crusher two kinds of machines and double roll crusher, roller breaking the advantages of crushing a small degree of product powder, low power consumption. The disadvantage is the roller gear to wear, not breaking up hard materials, low productivity. Broken chunk of raw coal in the coal preparation plant
? The hammer crusher is the use of high-speed rotary hammer against the role of broken. Is suitable for crushing brittle material, coal crushing 13-3mm, but also to ensure that the product is not mixed with particles of large particle size used for coal in pieces and crushing operations. Hammer crusher rotor number is divided into a single rotor and dual-rotor type categories. Single rotor hammer crusher is divided into two kinds of reversible and irreversible. The coal preparation plant to use more single-rotor hammer crusher. Hammer to break the advantage of simple structure, compact, large capacity, broken less than Japanese power consumption. The main drawback is easy to plug the grate of the material moisture content is high; hammerhead and the grate of the wear faster; In addition, if the rotor balance, harmful vibration in high-speed rotation; If the hammer does not meet the requirements to combat balance will also have a harmful force, the extra energy consumption and reduce bearing life.
? Impact Crusher is also the impact of the role of a broken machine. From the structure, somewhat like the hammer crusher, but there are many important differences: the back-breaking hammer rigidly fixed on the rotor, when broken, can take full advantage of the energy of the entire rotor, crushing the bulk material; a counter-attack device and larger crushing chamber, the material broken not only by the hammer impact, but also the use of materials and the impact of the back plate and the granularity of the material in the product of crushing cavity collide with each other; the bottom of the crusher does not grate, broken by the back plate decision, they were able to avoid the phenomenon of the wet material clogging the grate bars and the gap between the hammer
Counter the advantages of the rock breaking machine: the impact of broken broken objects along the fragile surface cracked, broken high-efficiency, less energy consumption, production, uniform particle size; broken than large, simple structure, easy fabrication; with selective fragmentation characteristics, namely, the density of materials broken particle size is small, after the crushing of the small density of the material particle size. The main disadvantage of crusher hammer wear faster, and dust. The crusher can be used as crude materials, crushing, can be used in the crushing of the raw coal and coal in the coal preparation plant.

Source Red Star Crusher net www.hxfhp.com (reproduced please specify source)
Efficient crushing Machines http://www.hxfhp.com/pros/pro11.htm ;
Wheeled mobile crushing the station http://www.hxfhp.com/pros/pro10.htm ;
Tracked mobile crushing plant http://www.hxfhp.com/pros/pro12.htm ;
Roll Crusher http://www.hxfhp.com/pros/pro9.htm ;
Crusher Product knowledge http://www.hxfhp.com/hy/

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