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Cyanide residue three-level reverse thickening purifying method of gold concentrate smelting industry

A technology for gold concentrate and cyanide slag, which is applied in chemical instruments and methods, separation methods, filtration circuits, etc., can solve the problems of high processing difficulty and high processing and disposal costs, and achieves good processing indicators, low processing costs, environmental and economical Significant effect

Inactive Publication Date: 2019-07-05
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a three-stage reverse dense purification method for cyanide slag in a gold concentrate smelting enterprise to solve the problem that the cyanide slag produced by the cyanidation process in a gold concentrate smelting enterprise is relatively difficult to process and the cost of treatment is very high

Method used

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  • Cyanide residue three-level reverse thickening purifying method of gold concentrate smelting industry
  • Cyanide residue three-level reverse thickening purifying method of gold concentrate smelting industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Include the following steps:

[0020] (1) The cyanide slurry produced by the cyanidation process of the gold concentrate smelting enterprise is passed into the filter press-1 for pressure filtration, the filter press-1 is used to reuse the filtrate, and the cyanide slag that is filtered out by the filter press-1 is added to the adjustment Slurry adjustment is carried out in the stock tank one 2, and the total cyanide concentration in the cyanide slurry liquid phase that described gold concentrate smelting enterprise cyanide process produces is 1500mg / L, and the press filter residue moisture content of filter press one is 25%, adjusts The residence time of slurry tank 1 is 1h;

[0021] (2) The cyanide pulp adjusted in pulping tank 1 2 enters thickener 1 3 for thickening, the bottom flow of thickener 1 3 enters pulping tank 2 4 for pulping, and the supernatant overflows in thickener 1 3 in turn Enter the stirring reaction device one 5 and the stirring reaction device two...

Embodiment 2

[0026] Include the following steps:

[0027] (1) The cyanide slurry produced by the cyanidation process of the gold concentrate smelting enterprise is passed into the filter press-1 for pressure filtration, the filter press-1 is used to reuse the filtrate, and the cyanide slag that is filtered out by the filter press-1 is added to the adjustment Slurry mixing is carried out in the stock tank one 2, and the total cyanide concentration in the cyanide slurry liquid phase that described gold concentrate smelting enterprise cyanide process produces is 2000mg / L, and the pressure filter residue moisture content of filter press one is 28%, adjusts The residence time of slurry tank 1 is 1h;

[0028] (2) The cyanide pulp adjusted in pulping tank 1 2 enters thickener 1 3 for thickening, the bottom flow of thickener 1 3 enters pulping tank 2 4 for pulping, and the supernatant overflows in thickener 1 3 in turn Enter the stirring reaction device one 5 and the stirring reaction device two ...

Embodiment 3

[0033] Include the following steps:

[0034] (1) The cyanide slurry produced by the cyanidation process of the gold concentrate smelting enterprise is passed into the filter press-1 for pressure filtration, the filter press-1 is used to reuse the filtrate, and the cyanide slag that is filtered out by the filter press-1 is added to the adjustment Slurry mixing is carried out in the stock tank one 2, and the total cyanide concentration in the cyanide slurry liquid phase that described gold concentrate smelting enterprise cyanide process produces is 3000mg / L, and the press filter residue moisture content of filter press one is 30%, adjusts The residence time of slurry tank 1 is 1h;

[0035] (2) The cyanide pulp adjusted in pulping tank 1 2 enters thickener 1 3 for thickening, the bottom flow of thickener 1 3 enters pulping tank 2 4 for pulping, and the supernatant overflows in thickener 1 3 in turn Enter the stirring reaction device one 5 and the stirring reaction device two 6 f...

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Abstract

The invention relates to a cyanide residue three-level reverse thickening purifying method of a gold concentrate smelting industry, and belongs to gold industry solid waste treatment methods. Cyanidedore pulp is introduced into a first filter press to be filter-pressed, cyanide residues are added into a first pulp mixing groove to be subjected to pulp mixing and enter a first thickener to be thickened, underflow of the first thickener enters a second pulp mixing groove to be subjected to pulp mixing, supernatant of the first thickener overflows to sequentially enter a first stirring reactiondevice and a second stirring reaction device, hydrogen peroxide is added for treatment, and treating fluid automatically flows into a first buffer groove. The cyanided ore pulp mixed in a third pulp mixing groove enters a second buffer groove and enters a second filter press to be filter-pressed, and the cyanide residues filter-pressed in the second filter press are piled in a tailing pond. The cyanide residues are purified, the treated cyanide residues are legally piled, a contribution is made to valuable cyanide residue treatment of gold industry gold concentrate smelting enterprises, and the technology has high promotion applicability and lays a technical foundation for sustainable development of the gold industry.

Description

technical field [0001] The invention relates to a method for treating solid waste in the gold industry in the field of environmental protection, in particular to a three-stage reverse dense purification method for cyanide slag in a gold concentrate smelting enterprise. Background technique [0002] In the gold industry, the cyanide slurry produced by the cyanide process of gold concentrate smelting enterprises contains relatively high concentrations of cyanide, and the cyanide slag from the press filtration of the cyanide slurry is hazardous waste, which is difficult to handle and costs a lot. In view of the difficulty of direct treatment of cyanide slag, the method of treating cyanide after slurry mixing is generally adopted. The main treatment technology of cyanide is chemical breaking of cyanide, and strong oxidants are used to convert cyanide into non-toxic substances, including alkali chlorine method, Inco Many of these technologies introduce other ions, resulting in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B01D25/12B01D36/00
CPCB01D25/12B01D36/00B09B3/00
Inventor 降向正李哲浩刘影高飞翔张宇王莹
Owner CHANGCHUN GOLD RES INST
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