There are two basic processes during the beneficiation process. One is dissociation which means to use crusher machine or ball mill series to make the block to be crushed or grinded then to separate and take out the useful particle from the ore; Two is separation which means to divide the different product according to the physics and chemical character from the ore particle which has been dissociated. Because mostly the useful ore is living with the gangue together tightly,and appear fine particle inbuilt state. If do not separate the different ore or element first,even there is a big difference between them,there will be no way to make the separation. So to separate the ore and gangue first which is the base what you have to do. About crushing machine and grinding machine’s purpose which is in order to dissociate the useful mineral and gangue from the ore.