Flotation process for comprehensively recovering gold and sulfur from copper tailings

Abstract

The invention relates to a flotation process for comprehensively recovering gold and sulfur from copper tailings. According to the floatation process, cave acid waste water, a capture agent and an alcohol foaming agent are added to the tailings from copper processing, recovery of objective minerals, copper and associated gold and silver is intensified, regrinding is conducted after ammonium sulfate is added, the objective minerals are cleaned and dissociated, sulfur concentrates are obtained through two-time concentration and serial return of middling products, the sulfur concentrates are subjected to size mixing through sulfuric acid and then subjected to flotation, and super-pure sulfur concentrates (sulfuric acid residues can be directly used as raw materials for iron-making) and gold-copper containing common sulfur concentrates (the sulfuric acid residues can comprehensively recover gold-copper). The flotation process has the advantages that the concentration effect is good, recovery of subsequent operation is facilitated, the sulfur concentrates are high in grade and good in purity, and the resource additive value of the sulfur concentrates can be improved, and the flotation process is suitable for being applied to copper mineral dressing plants for obtaining the super-pure sulfur concentrates with sulfur-copper tailings as raw materials and comprehensively recovering associated gold elements.

Description

technical field [0001] The invention relates to a flotation process for comprehensively recovering gold and sulfur from copper tailings, which is suitable for use in copper beneficiation plants that use sulfur-containing copper tailings as raw materials to obtain ultra-pure sulfur concentrates and comprehensively recover associated gold elements. Background technique [0002] Copper ore tailings have the characteristics of large quantity, fine particle size, various types, and complex composition. They generally have the potential characteristics of high value-added applications such as pyrite, associated gold and silver, and copper minerals. However, due to technical, economic benefits, and environmental protection requirements Many copper beneficiation plants often do not recover sulfur after recovering copper minerals, but directly discard it as tailings or concentrate it after initial enrichment. On the one hand, it affects the development and utilization of mineral resou...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, some people obtain high-grade sulfur concentrate through the flotation process. Most of them use stage grinding, adding sulfuric acid or adding inorganic salts such as copper sulfate to activate sulfur separation, so that while achieving the purpose of flotation, one is to consume New resources bring in new waste. Second, the energy consumption of stage grinding has exceeded the value of the material itself. Third, the comprehensive recovery of residual gold and copper is often not considered.

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