Separation method of polymetallic ore

Abstract

The invention discloses a grading method for polymetallic ores, and relates to the technical field of ore dressing. The grading method comprises the following steps: dividing raw ores into ores with three size fractions; sorting the ores with size fraction of (-)4mm to (+)2mm by primary gravity dressing equipment to obtain primary tailings which are discarded as tailings obtained by first-stage sorting; grinding primary concentrates, sorting the grinded primary concentrates by secondary gravity dressing equipment to obtain secondary tailings, combining the secondary tailings with primary middlings to obtain a mixture, grinding the mixture, and sorting the grinded mixture by flotation and tertiary gravity dressing equipment to obtain tertiary dressings which are discarded as tailings obtained by second-stage sorting; and sorting the ores with size fraction of (-)2mm by gravity dressing equipment to obtain tailings which are discarded as tailings obtained by third-stage sorting. Compared with the prior art, by virtue of discarding tailings in stages, gangue amount in a follow-up grading process is reduced, so that the tailing-discarding grade is effectively controlled, the waste discarding rate is increased by 5%-10%, and energy consumption and reagent consumption for grading are reduced by about 5%.

Description

technical field [0001] The invention relates to the technical field of ore dressing, in particular to a method for sorting polymetallic ores by segmented and tail-dropping. Background technique [0002] In the process of mineral separation, in order to enrich useful minerals, it is necessary to remove non-target minerals, namely gangue, to form tailings. In order to obtain concentrated ore that meets the requirements of smelting, the concentrator usually sets up a long sorting process to continuously enrich the ore, especially for sorting ore with a low grade of raw ore. The sorting process is longer and the process structure is better. complex. In the sorting process, the ore needs to go through the grinding of the grinding medium, the action of the flotation agent or some other processes that consume materials and electric energy. In the process, it not only affects the enrichment of the target minerals, but also increases the material consumption and energy consumption....

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for sorting polymetallic ores, so as to solve the problems of large gangue circulation, high energy consumption and chemical consumption in the sorting process of polymetallic ores

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