A copper-lead separation inhibitor, its preparation method and application method

By using copper-lead separation inhibitors such as acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, combined with multiple cleaning and scavenging processes, the problem of weak inhibition effect in the flotation of mixed copper and lead minerals was solved, achieving efficient copper-lead separation and environmentally friendly copper concentrate production.

CN117019411BActive Publication Date: 2026-01-02NANJING YINMAO LEAD-ZINC MINING CO LTD +1
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Patent Information

Application Number
CN202311161168.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-08
Publication Date
2026-01-02
Estimated Expiration
2043-09-08

AI Technical Summary

Technical Problem

In existing copper-lead mixed mineral flotation processes, inhibitors have weak inhibition effects, poor separation effects, significant environmental pollution, and highly toxic reagents, making it difficult to effectively separate copper and lead resources.

Method used

A copper-lead separation inhibitor, mainly composed of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, hydrolyzed polymaleic anhydride, sodium silicate, and sodium sulfite, is prepared as a suspension through emulsification and dispersion. It is then used in conjunction with a collector and a foaming agent during the flotation process to perform multiple fine selections and scavengings, forming a closed-loop cycle.

Benefits of technology

While ensuring copper recovery rate, it significantly reduces lead content in concentrate, improves copper concentrate quality, has good selectivity and environmental friendliness, and has good separation effect with little environmental pollution.

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Abstract

The application discloses a copper-lead separation inhibitor and a preparation method and an application method thereof, and the preparation method comprises the following steps: mixing acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer, hydrolyzed polymaleic anhydride, sodium silicate and sodium sulfite, and performing emulsification and dispersion to obtain a uniform viscous suspension. The application method comprises the following steps: adding active carbon, sodium sulfide, the copper-lead separation inhibitor, a collector Z-200 and a foaming agent No. 2 oil into copper-lead mixed concentrates to perform copper-lead separation flotation operation; performing three times of cleaning on the copper rough concentrates; and performing three times of scavenging on the obtained lead rough concentrates. The inhibitor composition is non-toxic; the inhibitor is rich in carboxyl and sulfonic acid groups, and under the action of the two main groups, the adsorption effect of the inhibitor on the surface of galena can be enhanced; the inhibitor can be used under neutral, weak acidic and weak alkaline conditions, has strong inhibition effect on galena, is strong in selectivity, is easy to obtain and store, is friendly to the environment, and can effectively improve the flotation separation indexes of copper-lead sulfide ores.
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