A method for recovering gold and fine antimony minerals in flotation tailings of antimony-containing gold ore

Abstract

The invention discloses a method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings. By the adoption of the method, the technical problem that if the antimony-containing gold ore flotation tailings are subjected to cyanide leaching directly, the cost is high, and the gold recovery rate is low is solved. Meanwhile, efficient recovery of associated antimony minerals can also be achieved. The method is characterized by comprising the steps that the tailings are rated, the tailings with the particle size being larger than 0.038 mm are subjected to regrinding and size mixing, copper sulfate, lead nitrate and ammonia carbonate are added sequentially as a mixed activating agent, sodium n-butylxanthate and ammonium butyl aerofloat serve as a collecting agent, No.2 oil serves as a foaming agent, and gold and the antimony minerals are recycled through flotation; and water is directly added into the tailings with the particle size being smaller than 0.038 mm for size mixing, grinding is not needed, sodium hexametaphosphate, copper sulfate, lead nitrate, ammonia carbonate, sodium n-butylxanthate, No.25 aerofloat, kerosene (or diesel oil) and No.2 oil are added in sequence, wherein the sodium hexametaphosphate serves a dispersing agent, the copper sulfate, lead nitrate and ammonia carbonate serve as an activating agent, the n-butylxanthate and No.25 aerofloat serve as a collecting agent, the kerosene (or diesel oil) serves an emulsifying agent, and the No.2 oil serves as a foaming agent, and gold and the micro-fine particle antimony minerals are recycled through flotation. The technique is reasonable, procedures are simple, the gold and antimony recovery rate is high, and industrialized implementation is easy.

Description

Technical field [0001] The invention belongs to the field of mineral processing, and relates to a method for recovering gold and fine-grained antimony minerals in the flotation tailings of antimony-containing gold mines, which helps to strengthen the recovery of gold and fine-grained antimony minerals in the tailings, and improves the gold recovery rate. Reduce the cost of tailings leaching. Background technique [0002] The cyanide gold extraction process has become the most widely used gold extraction process and method due to its low cost, high gold recovery rate, simple process flow and operating conditions. However, as the degree of gold mining resources in my country increases, it is easy to The mineral resources of beneficiation are decreasing year by year. According to statistics, about 60% to 70% of gold resources in the world belong to complex and difficult-to-treat gold mines, but the utilization of this part of gold resources is still low. [0003] The combined process...

AI Technical Summary

Problems solved by technology

Li Haoran and others invented a method for pretreatment of gold-containing tailings or cyanide leaching slag for desiliconization and gold leaching. First, lye is used to leach silicon in gold-containing tailings or cyanide leaching slag in two stages under high temperature and high pressure conditions. The filtrate is made into sodium silicate or sodium silicate solution, and the filter residue is mixed with lime and sodium cyanide for cyanidation to extract gold, so as to realize the recovery of silicon and gold in gold-bearing tailings or cyanide leaching residue. Higher, but the cost is higher, and it is difficult to implement industrially (patent application number: 201410412434.2)

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