The applied crushing machines in mining industry are classified into jaw crusher, cone crusher, roller crusher and impact crusher, etc. according to their different structure.
The common used jaw crushers are mainly as coarse crushing machine and medium crushing machine, which have three types for option, simple pendulum crusher, compound pendulum crusher, and hydraulic crusher. The working principle of first two is similar, only difference in moving trail of swing jaw. Hydraulic jaw crusher is developed based on simple compound jaw crusher. The cylinder safety mechanism and regulation mechanism replace the original safety and regulation mechanism.
Cone crushers are divided into two types of coarse crushing and medium and fine crushing according to the different usage. If they are classified according to the crushing chamber, they have standard type (for medium crushing), medium size (for medium, fine crushing), and short type (for fine crushing).
According to the surface situation, roller crushers have plain roller and non smooth roller; according to the structure of roller bearing, it has three types: fixed axis, simple moving axis, and double moving axis. Due to it has low production capacity with large area occupation, it is rarely applied in metal separation plant, but widely used at laboratory.
Impact crusher is a kind of high efficiency crushing machine with small size, simple structure and large crushing ratio. The machine has low power consumption, large production capacity, with even particle size, but the hammer plate and impact plate are easy to wear.
The working parameter of crusher includes nip angle, rotation speed, feeding opening and discharging opening. The operation condition must under large crushing ratio and high load factor.