Closed circuit ore grinding classification method

Abstract

The invention discloses a closed circuit ore grinding classification method and belongs to the field of mineral resource exploitation. The method comprises the steps of feeding a qualified ore grinding raw material into ore grinding equipment, and carrying out ore grinding to produce ore pulp; feeding the produced ore pulp into a spiral classifier, and treating by using the spiral classifier to produce fine particle overflow and coarse particle sand return; enabling the produced overflow to directly enter subsequent production, feeding the produced coarse particle sand return into sieving equipment to sieve and classify to produce undersize fine particles and oversize coarse particles; and enabling the undersize fine particles and the produced overflow to simultaneously enter subsequent production, and returning the oversize coarse particles serving as final sand return to a grinding machine to regrind. The method disclosed by the invention is easily realized on the existing basis, is economic and reasonable in technology and has the characteristics of simple process and high benefit.

Description

Technical field [0001] The invention relates to the field of mineral resource development, in particular to a closed-circuit grinding and grading method. Background technique [0002] The grinding and classification process is one of the important production processes of the concentrator. The production efficiency of the concentrator is limited by the grinding section, and its energy consumption accounts for 40% to 60% of the entire beneficiation process. It plays a role in connecting the previous and the next, and more importantly, Its rationality and stability are directly related to the stable operation of subsequent processes and the quality of their selection indicators. There are two main aspects to measure the technical and economic indicators of grinding and grading: one is the processing capacity of grinding and grading operations. The overall production capacity of a concentrator is usually controlled by the grinding and grading section. The large grinding and grading p...

AI Technical Summary

Problems solved by technology

ZL201410073761.X directly sieves and classifies the grinding products on the sieve as the sand for regrinding, and enters the next section under the sieve. The material is returned to the mill for regrinding, and the classification efficiency has been improved to a certain extent, but the production capacity of the screening equipment is small. If all the ore pulp in the concentrator needs to be screened, it is necessary to match a large number or large screening equipment. , covers a large area, and the life of large-scale screening equipment is short, and there are still some problems in the manufacturing process and manufacturing methods. Therefore, screening and grading are not conducive to the improvement of the production capacity of the dressing plant

ZL201410013253.2 directly uses the hydrocyclone with the ball mill, and ZL201310010477.3 feeds the ground product into the hydrocyclone after sieving and grading, so as to reduce the hydrocyclone compliance and improve the classification efficiency, but in view of the equipment production Problems in stability, production cost, processing capacity, etc. have not been widely used

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