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Method for extracting gold from material liquid with high gold content

A gold content and material liquid technology, applied in the field of gold extraction, can solve the problems of short production cycle, difficult to guarantee direct yield, high gold impurity content and other problems of chemical method, and achieve the advantages of small floor area, strong raw material adaptability and low material cost Effect

Inactive Publication Date: 2016-03-30
JINCHUAN GROUP LIMITED
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Problems solved by technology

The raw materials of the fire refining method are various solid materials containing gold. This method has strong material adaptability, simple equipment, and low cost, but the labor intensity is high, the environment is poor, the product purity is low, and the direct recovery rate is low; the raw materials of the electrolysis method are mainly Solid crude gold products, this method produces products with high purity, low cost, clean operation, and no harmful gas, but the production cycle is long, the direct recovery rate is low, and there is a backlog of funds; the extraction method is suitable for processing low-content gold liquid, and the operating conditions Good, high direct recovery rate, but not suitable for direct treatment of high-content materials; chemical method has short production cycle, high direct recovery rate, simple equipment, and strong material adaptability, but the gold impurity content obtained in one treatment is high, and direct Yield is difficult to guarantee

Method used

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  • Method for extracting gold from material liquid with high gold content

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step is to adjust the pH value of the solution: select 1L of gold electrolyte as a raw material, add 620g of 40% sodium hydroxide solution to it, and adjust the pH to 1.5.

[0020] The second step is to moderately heat the solution: raise the temperature of the solution to 70°C.

[0021] The third step is to add acid to filter and separate: add 115 g of oxalic acid to the heated solution, and filter after reacting for 1 hour to obtain a precipitate as a primary coarse gold powder and a gold-containing solution.

[0022] The 4th step, primary coarse gold powder purification: the gained coarse gold powder obtains 263.6g of 99.99% gold powder after boiling and washing with 20% nitric acid for 24 hours.

[0023] The fifth step, the acidity adjustment and extraction of the remaining solution: use hydrochloric acid to adjust the acidity of the remaining solution in the third step to 1mol / L, and then use dibutyl carbitol (DBC) to extract the gold element.

[0024] T...

Embodiment 2

[0028] The first step is to adjust the pH value of the solution: select 100L Jinwang water solution as a raw material, add 65.7L of 40% sodium hydroxide solution to it, and adjust the pH to 1.5.

[0029] The second step is to moderately heat the solution: raise the temperature of the solution to 80°C.

[0030] The third step, add acid and filter and separate: add 12.1 kg of oxalic acid to the heated solution, react for 2 hours and then filter.

[0031] The 4th step, primary coarse gold powder purification: the obtained coarse gold powder was boiled and washed with 30% nitric acid for 48 hours to obtain 26397g of 99.99% gold powder.

[0032] The fifth step, the acidity adjustment and extraction of the remaining solution: use hydrochloric acid to adjust the acidity of the remaining solution in the third step to 3mol / L, and then use dibutyl carbitol (DBC) to extract the gold element.

[0033] The sixth step, back extraction and solid-liquid separation: add the reducing agent sod...

Embodiment 3

[0037] The first step is to adjust the pH value of the solution: select 10L of Jinwang water solution as a raw material, add 6.3L of 40% sodium hydroxide solution to it, and adjust the pH to 1.5.

[0038] The second step is to moderately heat the solution: raise the temperature of the solution to 80°C.

[0039] The third step, add acid and filter and separate: add 1.32 kg of oxalic acid to the heated solution, react for 2 hours and then filter.

[0040] The 4th step, primary coarse gold powder purification: the obtained coarse gold powder was boiled and washed with 30% nitric acid for 48 hours to obtain 1567.6g of 99.99% gold powder.

[0041] The fifth step, the acidity adjustment and extraction of the remaining solution: use hydrochloric acid to adjust the acidity of the remaining solution in the third step to 1mol / L, and then use dibutyl carbitol (DBC) to extract the gold element.

[0042] The sixth step, back extraction and solid-liquid separation: add the reducing agent ...

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Abstract

The invention provides a method for extracting gold from material liquid with the high gold content. The method comprises the following steps that first, the pH value of a solution is regulated; second, the solution is appropriately heated; third, acid is added into the solution for filtering and separating; fourth, primary coarse gold powder purification is conducted; fifth, the remaining solution is subjected to acidity regulating and extraction; sixth, reverse extraction solid-liquid separation is conducted. Furthermore, a reducing agent adopted in the sixth step is oxalic acid; furthermore, the reducing agent adopted in the sixth step is sodium sulfite; furthermore, zinc powder is added into the remaining tail solution in the sixth step, and platinum group metal can be displaced; furthermore, the method is suitable for waste gold electrolyte and gold chloroazotic acid dissolved solutions.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for extracting gold from feed liquid with high gold content. Background technique [0002] Gold is an important precious metal, which plays an important role in modern economy and industrial production because of its expensive economic value and unique physical and chemical properties such as high temperature resistance and corrosion resistance. At present, the production methods of gold mainly include fire refining method, electrolysis method, extraction method and chemical method. The raw materials of the fire refining method are various solid materials containing gold. This method has strong material adaptability, simple equipment, and low cost, but the labor intensity is high, the environment is poor, the product purity is low, and the direct recovery rate is low; the raw materials of the electrolysis method are mainly Solid crude gold products, this method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00
CPCC22B11/04
Inventor 潘从明谢振山李进武刘成刘世和李芬霞
Owner JINCHUAN GROUP LIMITED
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