Separation method of copper-lead sulfide minerals

Abstract

The invention discloses a separation method of copper-lead sulfide minerals and belongs to the field of mineral separation. According to the method, the copper-lead sulfide minerals are used as raw materials. The separation method includes steps that raw ores are milled; copper and lead mixed rough concentrate is obtained by means of a flotation method, lime and zinc sulfate which serve as inhibitors are added to the copper and lead mixed rough concentrate for concentration to obtain copper and lead mixed concentrate, CMLM (starch phosphate: sodium carboxymethyl starch=(2-4):1) is added to the copper and lead mixed concentrate, the CMLM is used as an inhibitor of lead minerals, and Z-200# is used as a flotation collecting agent of copper minerals for performing copper-lead separation. The CMLM which is used as an inhibitor of lead sulfide minerals has the advantages of being good in selectivity, high in inhibiting ability, small in using amount and convenient to add, activated carbon reagent removal or mechanical concentration reagent removal is not required during the process of copper-lead separation, the operating procedure is simple, problems of environmental pollution brought by traditional dichromate methods and cyanide methods and high costs are solved, and the floating separation method for separating the copper-lead sulfide minerals is simple, convenient, efficient and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for separating copper-lead sulfide minerals. Background technique [0002] At present, there are two schemes for the separation of copper and lead: one is floating copper to suppress lead, and the other is floating lead to suppress copper. Commonly used methods are (1) dichromate method. Flotation of copper sulfide minerals by inhibiting galena with dichromate to achieve separation of copper and lead. (2) Cyanide method. Cyanide has a strong inhibitory effect on chalcopyrite, but almost no inhibitory effect on galena. Using this method, copper flotation and lead can be inhibited, and better results can be obtained. (3) Heating method. The method is to use steam to heat the copper-lead mixed concentrate to about 60°C. In the acidic or neutral slurry, the collector on the surface of the galena is desorbed, and the surface is oxidized and hydrophilic, while t...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the above prior art are;

[0004] Although dichromate and cyanide can effectively realize the flotation separation of copper and lead sulfide minerals, they will cause serious pollution to the environment

Although the heating method has no pollution to the environment, the method has high energy consumption, high production cost, and difficult control of the production process, so it is not suitable for large-scale promotion

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