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Method for recovering gold and silver from waste gold/silver-containing activated carbon

A technology of activated carbon and activated carbon adsorption, which is applied in the direction of improving process efficiency and reducing gas emissions, can solve problems affecting the health of employees, discourage promotion, waste of precious metals, etc., and achieve the goal of easy implementation and promotion, easy promotion and resource saving Effect

Active Publication Date: 2015-02-18
芒市海华开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the treatment of this kind of waste carbon, the current traditional treatment process is: ashing-blast furnace smelting-ash blowing-refining, among which small blast furnace smelting and lead ash blowing smelting are eliminated processes, which are not encouraged to be promoted; and this process is harmful to the environment.

Method used

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  • Method for recovering gold and silver from waste gold/silver-containing activated carbon

Examples

Experimental program
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Example Embodiment

[0017] Example 1:

[0018] The method for recovering gold and silver from gold and silver-containing waste activated carbon of the present invention is as follows: send gold and silver-containing waste activated carbon to ashing furnace 1, fully burn by spontaneous combustion under oxygen-enriched conditions, and sinter into blocks, and the smoke generated is first passed through the ashing furnace. The dust chamber is bagged to collect dust, and the collected dust is analyzed and tested to recover metals according to the composition. The exhaust gas after dust collection is introduced into the lye countercurrent spray tower 3 through the fan, and the mass concentration of 10% hydrogen in the lye storage tank 4 is used The sodium oxide solution is circulated and sprayed to remove waste gases such as carbon dioxide produced by combustion; the agglomerate is sent to the pulverizer 5 for grinding, and after the particle size is finer than 300 mesh, it is transferred to the cyanide...

Example Embodiment

[0019] Example 2:

[0020] The method for recovering gold and silver from gold and silver-containing waste activated carbon of the present invention is as follows: send gold and silver-containing waste activated carbon to ashing furnace 1, fully burn by spontaneous combustion under oxygen-enriched conditions, and sinter into blocks, and the smoke generated is first passed through the ashing furnace. The dust chamber is bagged to collect dust, and the collected dust is analyzed and tested to recover metals according to the composition. The exhaust gas after dust collection is introduced into the lye countercurrent spray tower 3 through the fan, and the mass concentration of 10% hydrogen in the lye storage tank 4 is used The sodium oxide solution is circulated and sprayed to remove waste gases such as carbon dioxide produced by combustion; the agglomerate is sent to the pulverizer 5 for grinding, and after the particle size is finer than 300 mesh, it is transferred to the cyanide...

Example Embodiment

[0021] Example 3:

[0022] The method for recovering gold and silver from gold and silver-containing waste activated carbon of the present invention is as follows: send gold and silver-containing waste activated carbon to ashing furnace 1, fully burn by spontaneous combustion under oxygen-enriched conditions, and sinter into blocks, and the smoke generated is first passed through the ashing furnace. The dust chamber is bagged to collect dust, and the collected dust is analyzed and tested to recover metals according to the composition. The exhaust gas after dust collection is introduced into the lye countercurrent spray tower 3 through the fan, and the mass concentration of 10% hydrogen in the lye storage tank 4 is used The sodium oxide solution is circulated and sprayed to remove waste gases such as carbon dioxide produced by combustion; the agglomerate is sent to the pulverizer 5 for grinding, and after the particle size is finer than 300 mesh, it is transferred to the cyanide...

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Abstract

The invention discloses a method for recovering gold and silver from waste gold/silver-containing activated carbon. The method comprises the following steps: sintering invalid and broken waste gold/silver-containing activated carbon through a sintering furnace and making the waste gold/silver-containing activated carbon into blocks, grinding the blocks into powder through a grinding machine, and conveying the powder to a stirring carbon leaching system; stirring until a cyanating solution is leached and gold and silver are adsorbed by the activated carbon; and resolving the gold/silver-loaded high-activity carbon and extracting gold and silver to recover gold and silver in the waste activated carbon. In the method disclosed by the invention, both the adsorption activated carbon and cyanating solution are recyclable, and smoke dust generated from combustion is respectively collected and sprayed to reduce pollution; the involved equipment and apparatus are skillfully applied in industry; therefore, the method is a method for recovering gold and silver in the waste activated carbon, which is simple in equipment, resource-conserving, environmental friendly and low-carbon, economic and cheap, and easy to implement and popularize.

Description

technical field [0001] The invention relates to a method for recovering gold and silver, in particular to a method for recovering gold and silver from waste activated carbon containing gold and silver. Background technique [0002] Most of the mines in the current gold production enterprises are not large in scale, and are generally scattered in remote mountainous areas, and the heap leaching-adsorption-desorption process is widely used. In the process of heap leaching, adsorption and desorption, the failure and wear of activated carbon will cause A small amount of waste activated carbon containing gold and silver. [0003] For the treatment of this kind of waste carbon, the current traditional treatment process is: ashing-blast furnace smelting-ash blowing-refining, among which small blast furnace smelting and lead ash blowing smelting are eliminated processes, which are not encouraged to be promoted; and this process is harmful to the environment. Pollution, energy consum...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/122Y02P10/20
Inventor 陈水奇邵维龙缪祥龙许乌朋许春景
Owner 芒市海华开发有限公司
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