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Environmentally-friendly gold extracting agent and preparation method thereof

A gold extracting agent and environmental protection technology, applied in the field of new environment-friendly gold extracting agent and its preparation, can solve the problems of restriction, pollution of the ecological environment, high toxicity, etc., and achieve environmental protection and good economic benefits, simple production method, and low production cost Effect

Pending Publication Date: 2020-06-19
有研资源环境技术研究院(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main gold extraction method in the world is cyanide method, which has a history of more than 100 years. It occupies a dominant position in the current gold industry due to its simple process and high gold recovery rate. The cyanide used in the cyanide process There are also major defects: 1. It is highly toxic, seriously endangering the safety and life of humans and animals, and polluting the ecological environment; 2. The technical and economic indicators of complex ores deteriorate, which is extremely inconsistent with the characteristics of gold ores in my country and the changing trend of gold resources in the world. These two major flaws limit its development in the future

Method used

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  • Environmentally-friendly gold extracting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] process such as figure 1 As shown, use a mixer to mix dry sodium carbonate, urea and yellow blood salt sodium evenly, wherein the mass ratio of each component is: sodium carbonate 50%, urea 35%, yellow blood salt sodium 15%, after mixing, place it in a stainless steel Heat the container to 850°C for 5 hours, then pour out the environmentally friendly agent and place it in an open stainless steel container to cool naturally to room temperature, and use a jaw crusher to crush it to -20mm for later use.

[0021] Use this environment-friendly gold extraction agent and sodium cyanide to leach gold from a gold mine in Inner Mongolia. The gold grade of the ore sample is 1.35g / t, the grinding fineness is -200 mesh, accounting for 95.5%, and the pulp concentration is 33%, adjusted by CaO The pH of the pulp is 11, the dosage of CaO is 5kg / t, the alkali treatment time is 2h, the leaching time is 24h, and the dosage of gold leaching agent is 1kg / t.

[0022] Table 1 Environmental p...

Embodiment 2

[0025] process such as figure 1 As shown, use a blender to mix dry sodium carbonate, urea and yellow blood salt sodium evenly, and the mass ratio of each component is: sodium carbonate 55%, urea 32%, yellow blood salt sodium 13%, and put it in a stainless steel container after mixing Heated to 800°C for 5 hours, then poured out the environmental protection agent and placed it in an open stainless steel container to cool naturally to room temperature, and crushed to -20mm with a jaw crusher for later use.

[0026] Use this environment-friendly gold extraction agent and sodium cyanide to leach gold from a gold mine in Xinjiang. The gold grade of the ore sample is 1.79g / t, the grinding fineness is -400 mesh, accounting for 95%, the pulp concentration is 33%, and it is adjusted by CaO The pH of the pulp is 11, the dosage of CaO is 3kg / t, the alkali treatment time is 2h, the leaching time is 24h, and the dosage of gold leaching agent is 1.5kg / t. The results of environmental protect...

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Abstract

The invention relates to an environmentally-friendly gold extracting agent and a preparation method thereof, belonging to the technical field of gold production. The environmentally-friendly gold extracting agent comprises sodium carbonate, urea, and yellow prussiate of soda. The preparation method comprises the following steps of: uniformly mixing the raw materials according to a certain proportion, heating the mixture to 800-850 DEG C in a closed container, keeping for a certain period of time, then pouring the mixture into an open container, and naturally cooling the mixture to obtain the environmentally-friendly gold extracting agent. The environmentally-friendly gold extracting agent can completely replace sodium cyanide and is suitable for the recovery and utilization of gold in gold-bearing oxidized ore and gold-bearing tailings. Compared with other agents, the environmentally-friendly gold extracting agent has the characteristics of low production cost, simple production method, strong applicability, environmental protection, good economic benefits and the like.

Description

technical field [0001] The invention belongs to the technical field of gold production, and relates to a gold extracting agent and a preparation method thereof, in particular to a novel environment-friendly gold extracting agent and a preparation method thereof. Background technique [0002] Gold is a metal substance of great economic and industrial value, which plays an important role in meeting people's living needs and ensuring national financial and economic security. At present, the main gold extraction method in the world is cyanide method, which has a history of more than 100 years. It occupies a dominant position in the current gold industry due to its simple process and high gold recovery rate. The cyanide used in the cyanide process There are also major defects: 1. It is highly toxic, seriously endangering the safety and life of humans and animals, and polluting the ecological environment; 2. The technical and economic indicators of complex ores deteriorate, which i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/12
CPCC22B11/04Y02P10/20
Inventor 尚鹤温建康武彪
Owner 有研资源环境技术研究院(北京)有限公司
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