Method for recovering copper from copper flotation system liquids of tailings after cyaniding gold extraction

A technology for cyaniding tailings and recovering copper, which is applied in the field of copper recovery, can solve problems such as the lack of effective treatment methods, the inability to effectively recover metal copper, and environmental pollution, so as to achieve great environmental benefits and social benefits, and improve resource integration Use and increase the effect of economic benefits

Inactive Publication Date: 2013-09-04
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lead-separation tailings are then subjected to copper separation operations, and the copper concentrate with about 10% copper produced is returned to the roasting system for processing or sale. The liquid contains cyanide, copper, etc., and is directly discharged. On the one hand, it will pollute the environment. On the other hand, the valuable metal copper cannot be effectively recovered, and there has been no effective treatment method. Therefore, it is necessary to explore and develop new processes. Take measures to purify and recycle the liquid, turn waste into treasure, and comprehensively utilize

Method used

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  • Method for recovering copper from copper flotation system liquids of tailings after cyaniding gold extraction
  • Method for recovering copper from copper flotation system liquids of tailings after cyaniding gold extraction
  • Method for recovering copper from copper flotation system liquids of tailings after cyaniding gold extraction

Examples

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Effect test

Embodiment 1

[0021] One-step direct cyanidation of gold concentrate suitable for direct cyanidation treatment

[0022] Grind the gold concentrate suitable for direct cyanidation treatment, adjust the slurry concentration to 30%, control the mass percentage concentration of sodium cyanide at 0.55%, carry out stirring and leaching for 72 hours, and then filter and wash to obtain precious liquid containing gold and silver and cyanide Chemical tailings, precious liquid for replacement and extraction of gold;

[0023] Two-step cyanidation tailings for lead separation to produce lead concentrate and lead separation tailings

[0024] Concentrate the cyanide tailings, press filter, adjust the slurry of the produced filter cake, add lime, control the pH=9.5, add 0.008% collector butyl xanthate and 0.008% foaming agent 2# flotation oil, Carry out the operation of first roughing, second refining and second sweeping of lead, the resulting lead concentrate is sold after pressure filtration, and the le...

Embodiment 2

[0032] One-step direct cyanidation of gold concentrate suitable for direct cyanidation treatment

[0033] Grind the gold concentrate suitable for direct cyanidation treatment, adjust the slurry concentration to 33%, control the mass percentage concentration of sodium cyanide at 0.58%, carry out stirring and leaching for 72 hours, and then filter and wash to obtain precious liquid containing gold and silver and cyanide Chemical tailings, precious liquid for replacement and extraction of gold;

[0034] Two-step cyanidation tailings for lead separation to produce lead concentrate and lead separation tailings

[0035] Concentrate the cyanide tailings, press filter, adjust the slurry of the produced filter cake, add lime, control the pH=10.0, add 0.010% collector butyl xanthate and 0.010% foaming agent 2# flotation oil, Carry out the operation of first roughing, second refining and second sweeping of lead, the resulting lead concentrate is sold after pressure filtration, and the l...

Embodiment 3

[0043] One-step direct cyanidation of gold concentrate suitable for direct cyanidation treatment

[0044]Grind the gold concentrate suitable for direct cyanidation treatment, adjust the slurry concentration to 35%, control the mass percentage concentration of sodium cyanide at 0.60%, carry out stirring and leaching for 72 hours, and then filter and wash to obtain precious liquid containing gold and silver and cyanide Chemical tailings, precious liquid for replacement and extraction of gold;

[0045] Two-step cyanidation tailings for lead separation to produce lead concentrate and lead separation tailings

[0046] Concentrate the cyanide tailings, press filter, adjust the slurry of the produced filter cake, add lime, control the pH=11.5, add 0.012% collector butyl xanthate and 0.012% foaming agent 2# flotation oil, Carry out the operation of first roughing, second refining and second sweeping of lead, the resulting lead concentrate is sold after pressure filtration, and the le...

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Abstract

The invention relates to a method for recovering copper from a copper flotation system liquid of tailings after cyaniding gold extraction. The method comprises the steps of regulating the pH (potential of Hydrogen) value of the copper flotation system liquid produced through sequentially carrying out lead flotation and copper flotation on gold concentrate after being subjected to cyanide leaching and gold and silver extraction, enabling the copper flotation system liquid subjected to pH adjustment to react with hydrogen peroxide, decomposing cyanogen, and depositing and recovering copper. According to method disclosed by the invention, the copper flotation system liquid is comprehensively processed, the cyanogen is decomposed and the valuable element copper in the liquid is recovered, so that the pollution of cyanogen-containing waste water to the surrounding environment is eliminated, the liquid after being processed can serve as reclaimed water to return to the system for use, the comprehensive utilization rate of resources is increased, the economic benefit of enterprises is increased and environmental protection and social benefit are provided.

Description

technical field [0001] The invention relates to a method for recovering copper from a copper beneficiation system liquid of cyanidation gold extraction tailings, and belongs to the technical fields of gold smelting, wastewater treatment in chemical industry and environmental protection. Background technique [0002] In the gold smelting industry, the gold concentrate suitable for direct cyanidation treatment adopts the cyanide tailings produced after direct cyanidation to extract gold and silver, which still contains 3-5% lead and copper. Lead and copper are not efficiently recovered. In recent years, with the continuous improvement of flotation technology and the continuous increase of the price of non-ferrous metals, the valuable metal lead and copper contained in cyanide tailings have been recovered by flotation. Most of the flotation uses lead to be selected first, and the obtained lead concentrate contains more than 40% lead, which is directly sold to the outside world...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B3/44
CPCY02P10/20
Inventor 郭建东王建政梁志伟刘占林孔令强
Owner SHANDONG GUODA GOLD
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