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A kind of multi-element recovery method of cyanidation gold extraction waste liquid

A recovery method and a technology for extracting gold waste liquid, applied in the direction of improving process efficiency, etc., can solve problems such as pollution, and achieve the effect of solving environmental pollution

Active Publication Date: 2022-02-22
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of pollution in the waste cyanide-containing waste liquid produced by existing gold production, and provides a multi-element recovery method for cyanide gold extraction waste liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The production method of the cyanide-containing barren solution in this embodiment is as follows: the gold concentrate is subjected to the cyanidation gold extraction process, the gold-containing cyanide solution is replaced by zinc powder, and after the replacement, the gold and silver are precipitated, and the gold-depleted solution obtained after the gold and silver is precipitated Liquid, that is, cyanide gold extraction poor solution, the total cyanide content of cyanide gold extraction poor solution is 1400mg / L, and the gold content is 0.015g / m 3 , the silver content is 0.06g / m 3 , copper content is 1.80g / L, zinc content is 2g / L, the step that carries out multi-element recovery method for this cyanogen-containing barren solution is:

[0016] 1) Primary acidification treatment: the cyanidation gold extraction poor solution obtained after the cyanide gold extraction process replaces the precipitated gold and silver is mixed with concentrated sulfuric acid in 2 stirr...

Embodiment 2

[0022] The production method of the cyanide-containing barren solution in this embodiment is as follows: the gold concentrate is subjected to the cyanidation gold extraction process, the gold-containing cyanide solution is replaced by zinc powder, and after the replacement, the gold and silver are precipitated, and the gold-depleted solution obtained after the gold and silver is precipitated Liquid, that is, cyanide gold extraction poor solution, the total cyanide content of cyanide gold extraction poor solution is 1800mg / L, and the gold content is 0.02g / m 3 , the silver content is 0.08g / m 3 , copper content is 2.30g / L, and zinc content is 2.50g / L, and the step that carries out multi-element recovery method for this cyanogen barren solution is:

[0023] 1) Primary acidification treatment: the cyanidation gold extraction poor solution obtained after the cyanide gold extraction process replaces the precipitated gold and silver is mixed with concentrated sulfuric acid in 2 stirri...

Embodiment 3

[0029] The production method of the cyanide-containing barren solution in this embodiment is as follows: the gold concentrate is subjected to the cyanide gold extraction process, the gold-containing cyanide solution is replaced by zinc powder, and after the replacement, the gold and silver are precipitated, and the gold-depleted solution obtained after the gold and silver is precipitated Liquid, that is, cyanide gold extraction poor solution, the total cyanide content of cyanide gold extraction poor solution is 2100mg / L, and the gold content is 0.03g / m 3 , the silver content is 0.10g / m 3 , copper content is 2.80g / L, and zinc content is 3g / L, and the step that carries out multi-element recovery method for this cyanogen-containing barren solution is:

[0030] 1) Primary acidification treatment: the cyanidation gold extraction poor solution obtained after the cyanide gold extraction process replaces the precipitated gold and silver is mixed with concentrated sulfuric acid in 3 st...

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PUM

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Abstract

The invention discloses a multi-element recovery method of cyanidation gold extraction waste liquid, which includes the generation of cyanide-containing barren liquid, primary acidification treatment, zinc slag acidification, primary sulfidation to produce zinc concentrate, secondary acidification treatment and secondary sulfidation Production of copper concentrate and other steps. The present invention carries out multiple acidification and targeted recycling of zinc and copper on the gold-removing barren solution obtained after precipitating gold and silver. The problem of pollution to the environment after the discharge of cyanide waste liquid.

Description

technical field [0001] The invention relates to the recovery of gold smelting waste liquid, in particular to a multi-element recovery method for cyanidation gold extraction waste liquid. Background technique [0002] At present, the cyanide method is mainly used to extract gold and silver in my country's gold production. Although cyanide extraction of gold and silver is an economical and effective method, since cyanide leaching is used to extract gold and silver, and cyanide is a highly toxic chemical, the resulting Waste liquid discharge and treatment require a lot of treatment costs, so the barren solution after cyanide leaching gold extraction, that is, the barren solution for cyanidation gold extraction, is basically returned to the system for recycling. [0003] Since most of the cyanide-containing poor solution is returned to the production system for recycling, the impurity ions copper, zinc, iron, arsenic, etc. that affect the leaching of gold and silver in the cyan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B11/00C22B19/20C22B19/30
CPCC22B7/006C22B11/042C22B7/007C22B19/22C22B19/26C22B19/30C22B15/0089C22B15/0071Y02P10/20
Inventor 王建政张玉王敏杰王天星刘俊伟孙学平徐立杰朱德兵郭建东于志勇焦磊王力
Owner SHANDONG GUODA GOLD