Gold extraction agent and preparation process thereof

A technology of gold extracting agent and sodium carbonate, which is applied in the field of gold extracting agent and its preparation process, can solve the problems of high production cost, high toxicity, complex formula, etc., and achieve high stability, high gold extraction rate and high stability Effect

Inactive Publication Date: 2018-02-09
广西金之源矿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the amount of cyanide used, non-cyanide gold extraction agents can be used in gold smelting, but the existing non-cyanide gold extraction agents have complex formulas, high production costs, high toxicity, unstable chemical properties, and are difficult to industrialize.

Method used

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  • Gold extraction agent and preparation process thereof

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Effect test

Embodiment 1

[0017] Embodiment 1: preparation extracts gold agent

[0018] The formula is: a gold extracting agent, the gold extracting agent is mainly composed of urea, sodium carbonate, sodium ferrocyanide, and sodium thiosulfate, and the ratio of parts by weight of urea, sodium carbonate, and sodium ferrocyanide is: 50 :25:5.

[0019] The preparation method is: a preparation method of a gold extracting agent, comprising the following steps: (1) Weighing urea, sodium carbonate, and sodium ferrocyanide, adding the urea, sodium carbonate, and sodium ferrocyanide to a crusher for crushing, Obtain mixed particles with a particle size of 0.05mm; (2) Mix and stir the mixed particles for 5 minutes; (3) Put the mixed particles into the reactor for 5 minutes and react at a reaction temperature of 500°C, and the waste gas generated by the reaction is recycled with sodium hydroxide solution , the concentration of the sodium hydroxide solution is 0.5mol / L; (4) Liquid-solid separation is performed i...

Embodiment 2

[0020] Embodiment 2: preparation extracts gold agent

[0021] The formula is: a gold extracting agent, the gold extracting agent is mainly composed of urea, sodium carbonate, sodium ferrocyanide, and sodium thiosulfate, and the ratio of parts by weight of urea, sodium carbonate, and sodium ferrocyanide is: 70 :40:10.

[0022] The preparation method is: a preparation method of a gold extracting agent, comprising the following steps: (1) Weighing urea, sodium carbonate, and sodium ferrocyanide, adding the urea, sodium carbonate, and sodium ferrocyanide to a crusher for crushing, Obtain mixed particles with a particle size of 1.50 mm; (2) Mix and stir the mixed particles for 15 minutes; (3) Put the mixed particles into the reactor for 15 minutes and react at a reaction temperature of 700 ° C. The waste gas generated by the reaction is recycled with sodium hydroxide solution , the concentration of the sodium hydroxide solution is 1.0mol / L; (4) Liquid-solid separation is performed...

Embodiment 3

[0023] Embodiment 3: preparation extracts gold agent

[0024] The formula is: a gold extracting agent, the gold extracting agent is mainly composed of urea, sodium carbonate, sodium ferrocyanide, and sodium thiosulfate, and the ratio of parts by weight of urea, sodium carbonate, and sodium ferrocyanide is: 60 :30:7.

[0025] The preparation method is: a preparation method of a gold extracting agent, comprising the following steps: (1) Weighing urea, sodium carbonate, and sodium ferrocyanide, adding the urea, sodium carbonate, and sodium ferrocyanide to a crusher for crushing, Obtain mixed particles with a particle size range of 0.10 mm; (2) Mix and stir the mixed particles for 10 minutes; (3) Put the mixed particles into the reactor for 10 minutes of reaction, the reaction temperature is 600 ° C, and the waste gas generated by the reaction is recovered with sodium hydroxide solution Utilizing, the concentration of the sodium hydroxide solution is 0.8mol / L; (4) liquid-solid se...

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Abstract

The invention discloses a gold extraction agent and a preparation process thereof. The gold extraction agent is mainly formed by urea, sodium carbonate, sodium ferrocyanide and sodium thiosulfate. Polymer sodium cynanamide serves as the main chemical component of the gold extraction agent and is a mixture of a dimer, a trimer and a polymer. The gold extraction agent is decomposed in a water solution to release N(CN)2-perssad, the perssad can dissolve gold under the aerobic condition to generate complex ions, the gold can be effectively dissolved, and the gold extraction rate is high; raw materials are firstly added into a crusher to be crushed and then react, meanwhile, the temperature is set within the proper range, the content of the polymer in the polymer sodium cynanamide in the gold extraction agent can be increased, and the stability of the gold extraction agent is higher; and the gold extraction agent can be decomposed into free cyanide ions under the neutral condition and the acid condition, the chemical property is not stable, the gold extraction agent is toxic, a proper amount of sodium thiosulfate is added into the gold extraction agent, the occurrence of free cyanide can be restrained, and the stability of the gold extraction agent is improved.

Description

technical field [0001] The invention relates to a gold extracting agent, in particular to a gold extracting agent and a preparation process thereof. Background technique [0002] Since the discovery in 1887 that cyanide solution can dissolve gold, the production practice of cyanide gold extraction has been more than 100 years. The advantages of relatively mature technology, high recovery rate, strong adaptability to ore, and ability to produce gold on the spot make it the main method of gold leaching production. Although my country is very mature in the treatment technology of cyanide waste liquid, the removal rate of cyanide pollution can reach 99%. However, once cyanide leaks and pollutes, it will cause serious consequences. Cyanide is widely used in gold smelting, reducing the amount of cyanide used can solve the problem of cyanide pollution from the source. In order to reduce the amount of cyanide used, non-cyanide gold extraction agents can be used in gold smelting, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08
CPCC22B11/08
Inventor 李杰
Owner 广西金之源矿业科技有限公司
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