When asked to be selected in the intensity of 55-65% less than 0.074mm, can be considered:
1, ore crushing to 10-15mm, the use of a grinding process.
2, elected to mine large scale, with the ore is crushed to 20-25mm, grinding process with the first stage open two. With the first rod mill grinding plant in the process.
3 to 300 - 350mm, ore crushing, self grinding and ball milling, semi autogenous grinding and ball milling or grinding, milling and crushing process.
4, when the requirements of the ore grain size is very fine, less than 0.074mm particle size of 80% or more, or the requirements of the stage when the election, can use the first paragraph of the two section of the whole closed grinding process.
5, when containing a certain amount of precious metal ore, these precious metals may be gathered in the grinding circuit, the first part closed at both ends of the grinding process.