Method using mineral dressing backwater to float and to recover gold, silver, lead and zinc in cyanidation tailings of gold mine

Abstract

The invention discloses a method using mineral dressing backwater to float and recover gold, silver, lead and zinc in cyanidation tailings of a gold mine. The method comprises the following working procedures: (1) pulp pre-processing stage: adding mineral dressing backwater in cyaniding tailings, adding concentrated sulfuric acid to stir for 5 minutes, reacting the concentrated sulfuric acid withthe pulp until smoke is completely generated, adding activated carbon to remove reagent for 55 minutes, and then pumping to a flotation workshop section; and (2) bulk flotation stage: pumping the pretreated pulp into a 3-meter stirring buffer slot, stirring for 30 minutes continuously, flowing into a medicine injecting slot 1 and a medicine injecting slot 2 by proper motion, sequentially adding copper sulfate and diethyldithiocarbamate, stirring fully, then entering a floatation unit to perform roughing on the pulp, further carrying out selection stage by stage on the rough concentrate obtained by roughing to obtain qualified lead and zinc bulk concentrate containing gold and silver, and further carrying out scavenging stage by stage on the roughed tailing to obtain floated tailing which is the sulphur concentrate. The invention realizes comprehensive utilization of mineral dressing tailings and zero exhaust of the tailings, thus realizing cleaner production of the mineral dressing process.

Description

technical field [0001] The invention relates to a method for separating useful metal minerals and gangue minerals in minerals, in particular to a method for recovering gold, silver, lead and zinc minerals in cyanide tailings of gold mines through flotation using ore dressing backwater. Background technique [0002] Gold extraction by cyanidation is currently the mainstream technology for gold extraction in gold mines in the world. The advantages and disadvantages of this technology are very obvious. The advantage is that the effect of gold extraction is good. The disadvantage is that a large amount of cyanide tailings will be produced, and a large amount of cyanide tailings will be discharged and stored. Some of the heavy metal ions will accumulate for a long time, which will cause great harm to the environment. pollution, so it takes a lot of manpower and material resources to deal with the tailings. However, the final solid waste is still not completely resolved. It is par...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for recovering gold, silver, lead, and zinc in cyanide tailings of gold mines by flotation using ore dressing backwater, which can solve the problems of land occupation and secondary pollution caused by cyanide tailings, Realize the final treatment goal of industrial solid waste treatment reduction, harmlessness and resource utilization

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