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Method for recycling cyanide and copper and deep treatment of cyanide, copper, arsenic and sodium salt in barren liquor of gold smelting enterprise

An advanced treatment and enterprise technology, applied in metallurgical wastewater treatment, chemical instruments and methods, alkali metal sulfite/sulfate purification, etc., can solve problems such as clogging the filter cloth of the filter press and affecting production indicators

Inactive Publication Date: 2019-07-12
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for recovering barren liquid in gold smelting enterprises and deeply treating cyanide, copper, arsenic and sodium salt to solve the problem of excessive concentration of pollutants affecting production indicators and high-concentration sodium sulfate crystallization blockage during gold smelting enterprise barren liquid recycling. Filter cloth, pipeline and equipment problems

Method used

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  • Method for recycling cyanide and copper and deep treatment of cyanide, copper, arsenic and sodium salt in barren liquor of gold smelting enterprise
  • Method for recycling cyanide and copper and deep treatment of cyanide, copper, arsenic and sodium salt in barren liquor of gold smelting enterprise

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Embodiment 1

[0030] Include the following steps:

[0031] (1) The poor liquid produced by the cyanidation process of the gold smelting enterprise is pumped into the heater one 1, and then flows into the reactor one 2, the reactor two 3, the reactor three 4, and the buffer storage tank 5 successively by gravity, to the reactor Concentrated sulfuric acid is added to 2; among them, in the barren liquid produced by the cyanidation process of gold smelting enterprises, the concentration of cyanide is 2000mg / L, the concentration of copper is 1500mg / L, the concentration of arsenic is 50mg / L, and the content of sodium sulfate is 6%. The temperature of the lean liquid reaches 25°C, the residence time of reactor 1, reactor 2 and reactor 3 is 1.5h, the residence time of the buffer storage tank is 0.2h, the amount of concentrated sulfuric acid added to reactor 1 is 13kg / t, the concentrated sulfuric acid Store in the concentrated sulfuric acid storage tank 27, adjust the pH value in the reactor one to ...

Embodiment 2

[0042] Include the following steps:

[0043] (1) The poor liquid produced by the cyanidation process of the gold smelting enterprise is pumped into the heater one 1, and then flows into the reactor one 2, the reactor two 3, the reactor three 4, and the buffer storage tank 5 successively by gravity, to the reactor Add concentrated sulfuric acid to 2; among them, in the barren liquid produced by the cyanidation process of gold smelting enterprises, the concentration of cyanide is 3000mg / L, the concentration of copper is 2000mg / L, the concentration of arsenic is 150mg / L, and the content of sodium sulfate is 9%. The temperature of the lean liquid reaches 28°C, the residence time of reactor 1, reactor 2 and reactor 3 is 1.5h, the residence time of the buffer storage tank is 0.2h, the amount of concentrated sulfuric acid added to reactor 1 is 14kg / t, the concentrated sulfuric acid Store in the concentrated sulfuric acid storage tank 27, adjust the pH value in reactor one at 2.0;

...

Embodiment 3

[0054] Include the following steps:

[0055] (1) The poor liquid produced by the cyanidation process of the gold smelting enterprise is pumped into the heater one 1, and then flows into the reactor one 2, the reactor two 3, the reactor three 4, and the buffer storage tank 5 successively by gravity, to the reactor Add concentrated sulfuric acid to 2; among them, in the barren liquid produced by the cyanidation process of gold smelting enterprises, the concentration of cyanide is 4000mg / L, the concentration of copper is 2500mg / L, the concentration of arsenic is 200mg / L, and the content of sodium sulfate is 12%. The temperature of the lean liquid reaches 30°C, the residence time of reactor 1, reactor 2 and reactor 3 is 1.5h, the residence time of the buffer storage tank is 0.2h, the amount of concentrated sulfuric acid added to reactor 1 is 15kg / t, the concentrated sulfuric acid Store in the concentrated sulfuric acid storage tank 27, adjust the pH value in reactor one at 2.2;

...

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Abstract

The invention relates to a method for recycling cyanide and copper and deep treatment of cyanide, copper, arsenic and sodium salt in barren liquor of a gold smelting enterprise, and belongs to gold industry water treatment methods. According to the characteristic that the content of cyanide, copper, arsenic, sodium and sulfate radicals in the barren liquor of the gold smelting enterprise in the gold industry are high, the proper process path and equipment are selected, on the premise of ensuring safety production, cyanide and copper are recycled, polluted substances of cyanide, copper and arsenic are deeply treated, meanwhile, the method of combining the crystallization process with the drying process is adopted, the aims of purifying the water, and solving crystallization jam are achieved, cyanide and copper in the barren liquor of the gold smelting enterprise can be recycled, cyanide, copper, arsenic, sodium, sulfate radicals and the like in the barren liquor can be removed, valuableelement recycling and waste water deep purification are achieved, and the contribution is made to valuable element recycling, safety production, and production process normal running of the gold industry smelting enterprise.

Description

technical field [0001] The invention relates to a water treatment method in the gold industry in the field of environmental protection, in particular to a method for recovering barren liquid in a gold smelting enterprise and deeply treating cyanide, copper, arsenic and sodium salt. Background technique [0002] In the gold industry, the waste water produced by the cyanidation process of gold smelting enterprises is recycled, resulting in a lot of pollutants in the barren solution with a high concentration. The main pollutants include cyanide, copper, arsenic, sodium, sulfate, etc., among which cyanide Excessive concentrations of chemical compounds, copper, and arsenic will affect the process indicators when the barren solution is recycled, thereby affecting the benefits of the enterprise, while excessive sodium and sulfate concentrations will produce crystallization, which will block the filter cloth, pipelines and equipment of the filter press, etc. Affecting the normal ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B1/11C01D5/16C02F9/10C02F11/122C02F101/18C02F101/20C02F103/16
CPCC01D5/16C01P2006/80C02F1/04C02F1/66C02F1/722C02F9/00C02F11/122C02F2001/007C02F2101/18C02F2101/20C02F2103/16C22B1/11C22B7/006C22B15/0089Y02P10/20
Inventor 迟崇哲邱陆明孟凡钰崔崇龙
Owner CHANGCHUN GOLD RES INST
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