Method for improving ore grinding particle size stability rate of super-huge type mill

Abstract

The invention relates to a method for improving the stability rate of the grinding granularity of a super-huge type mill, belongs to the technical field of super-huge type ball mills, and solves the technical problems of improving the grinding efficiency and reducing the energy consumption.According to the method, the actual situation of hard ore treatment of the large-diameter ball mill is combined, and the steel ball system of the ball mill is obtained through a traditional beneficiation empirical formula; A large number of ore grinding tests are conducted, the proper steel ball proportion,the medium filling rate and the steel ball adding system are determined, the ore grinding energy consumption and the ore grinding cost of the ball grinding mill are reduced, the granularity composition of ore grinding products is optimized, the granularity stability rate of the ore grinding products is effectively increased, and process products reasonable in granularity distribution are providedfor subsequent sorting operation.

Description

technical field [0001] The invention belongs to the technical field of super-large ball mills, and in particular relates to a method for improving the stability rate of grinding particle size of super-large mills. Background technique [0002] The ore embedded in the company's mining area has fine particle size and high hardness (the Platinum hardness coefficient is greater than 25), and the designed grinding process is coarse crushing-semi-autogenous grinding-ball milling process (ie SAB process). The process creatively adopts large semi-autogenous mill, The SAB process of the large ball mill solves the problem of high-efficiency crushing and grinding of fine-grained and high-hardness iron ore. However, in order to achieve sufficient monomer dissociation of the ore to meet the requirements of subsequent sorting operations, the first stage of ball milling requires that the content of -0.074mm in the overflow product reach 87%-89%. [0003] In the process of production p...

AI Technical Summary

Problems solved by technology

[0003] In the process of production practice in recent years, it has been found that the particle size of grinding products has problems such as unreasonable particle size composition, the particle size of extremely fine products -19μm is significantly higher than the design value, and the hourly stability rate of overflow product particle size is low. Product particle size (-0.074mm content 89±1% hours) stability rate is only 65%

On the one hand, it will have many adverse effects on subsequent sorting operations. On the other hand, the cost of grinding, including steel ball consumption and power consumption, will increase significantly.

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