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Method for treating cyaniding gold extraction waste water

A waste water and chemical treatment technology, applied in the field of smelting, can solve the problems that the waste water cannot be fully returned for use, the treatment process is long, and the cost is high, and the effect of strong treatment adaptability, avoidance of gas pollution, and avoidance of loss can be achieved.

Active Publication Date: 2009-03-11
SHANDONG HUMON SMELTING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for treating cyanidation gold extraction wastewater, which mainly solves the problem that the existing gold extraction wastewater treatment process is long, difficult, and costly, and the wastewater cannot be fully returned to use And other issues

Method used

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  • Method for treating cyaniding gold extraction waste water
  • Method for treating cyaniding gold extraction waste water

Examples

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Effect test

Embodiment 1

[0011] Example 1: Mix the waste water produced by cyanidation gold extraction of conventional mines with 10% shell composite auxiliary agent aqueous solution for 5 hours, add flocculant anionic polyacrylamide before the mixed solution enters the settling tank, and carry out precipitation, flocculation and precipitation produce suspended solids After settling in the settling tank for 5 hours, it is pumped to the press for filtration, and the press is filtered for solid-liquid separation. After vacuum filtration, the filter cake and filtrate are obtained. The filter cake is sold as copper concentrate for comprehensive recovery, and all the filtrate is returned to the cyanide extractor. Gold system used.

[0012] The relevant elements of the filtrate are tested in Table 1:

[0013] Table 1

[0014]

Embodiment 2

[0015] Example 2: Mix the wastewater containing copper and arsenic cyanide gold extraction with 10% shell composite auxiliary agent aqueous solution for 6 hours, add flocculant anionic polyacrylamide before the mixed solution enters the settling tank, and carry out precipitation, flocculation and precipitation produce Suspended matter, after settling in the settling tank for 4 hours, is pumped to the press for filtration, and the press is filtered for solid-liquid separation. After vacuum filtration, the filter cake and filtrate are obtained. The filter cake is sold as copper concentrate for comprehensive recovery, and all the filtrate is returned to cyanide. It is used by chemical gold extraction system. The relevant element assay of the filtrate is shown in Table 2:

[0016] Table 2

[0017]

Embodiment 3

[0018] Example 3: Mix the wastewater containing copper and arsenic cyanide gold extraction with 10% shell composite auxiliary agent aqueous solution for 4 hours, add flocculant anionic polyacrylamide before the mixed solution enters the settling tank, and carry out precipitation, flocculation and precipitation produce Suspended matter, after settling in the settling tank for 6 hours, is pumped to the press for filtration, and the press is filtered for solid-liquid separation. After vacuum filtration, the filter cake and filtrate are obtained. The filter cake is sold as copper concentrate for comprehensive recovery, and all the filtrate is returned to cyanide. It is used by chemical gold extraction system.

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Abstract

The invention discloses a method for treating cyanide gold-extraction wastewater, which comprises the following steps: a shell compound additive is directly added to alkaline cyanide gold-extraction waste liquid so as to remove various harmful impurities affecting the cyanide leaching of gold through a precipitation form; all filtrate is returned to a cyanide gold-extraction system for application through solid-liquid separation; and a filter cake is used for sale as copper concentrate. The method has the advantage of overcoming the defects that the prior acidification method for treating wastewater is long in process, high in cost and incapable of returning all wastewater for application.

Description

Technical field: [0001] The invention relates to the technical field of smelting, in particular to a method for treating cyanidation gold extraction wastewater. Background technique: [0002] At present, with the improvement of people's awareness of environmental protection and energy conservation, the treatment and recycling of waste water produced by smelters has become more and more important, especially the waste water produced by cyanide gold extraction plants is harmful, and the treatment process is long and difficult. , the cost is high, and the waste water returned to use has high impurity content, which affects the recovery rate of gold in the cyanide system, and the waste water cannot be completely returned to use. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for treating cyanidation gold extraction wastewater, which mainly solves the problem that the existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/52
Inventor 王信恩高正林曲胜利王雄斌马少卫王斐张会建宋胜东张艳峰
Owner SHANDONG HUMON SMELTING
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