METHOD FOR IMPROVING GRINDING AND CLASSIFICATION CAPACITY BY REDUCING SAND DEPOSITION FINENESS RATIO VALUE

摘要

Disclosed is a method for improving a grinding and classification capacity by reducing a sand deposition fineness ratio θ0 value, relating to the technical field of grinding and classification. When a grinding machine and a cyclone form an organic unit to create a technological grinding and classification process, a traditional method uses an overflow fineness β value to improve capacity, whereas in the present method, a grinding and classification capacity is improved and power consumption is reduced by reducing a sand deposition fineness ratio θ0 value. In the present method, a grinding machine and a hydrocyclone form a first-section fully-closed-circuit two-section grinding and classification technological process and a first-section open-circuit two-section grinding and classification technological process, and a grinding and classification capacity chain is improved as follows: control a point B (aa) value on a second-section Φ500 mm hydrocyclone separation cone → control a sand deposition fineness ratio θ0 value → control a second-section grinding and classification load (Q2) → control a first-section ore grinding and classification capacity Q value. If θ0＝23.74％, the overflow concentration and fineness increase instead of being reduced, and the capacity is improved by 28.30%.