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Copper deposition method for copper-contained cyaniding leaching solution

A cyanide leaching and cyanide leaching technology is applied in the field of metallurgy, which can solve the problems of co-adsorption and desorption of gold-loaded carbon, gold and copper, and high copper content in heap leaching solution, and achieves easy operation and control, simple process and low cost. Effect

Inactive Publication Date: 2018-11-23
WUHAN INSTITUTE OF TECHNOLOGY
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  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to solve the existing problems in the existing gold ore cyanidation heap leaching process, such as high copper content in the heap leaching solution, co-adsorption of gold and copper on the gold-carrying carbon, and difficulty in subsequent desorption, and provide a leaching slag heap as a carrier The copper-containing cyanidation gold leaching solution copper precipitation method, the method is as follows:

Method used

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  • Copper deposition method for copper-contained cyaniding leaching solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A gold mine contains 0.36g / t of gold and 0.025% of copper (mass percentage, the same below).

[0027] (1) The ore is crushed, the maximum particle size is controlled within 500mm, the ore is washed and piled up, and the alkalinity of the ore pile is adjusted to be 10, and the sodium cyanide solution with a mass concentration of 1 / 10,000 is used at a rate of 12L / (m 2 • Spray the ore heap at a speed of h).

[0028] (2) When the gold ore heap is sprayed and leached to the middle stage, take part of the slag and build a heap with a height of 10 meters.

[0029] (3) the copper-containing cyanidation gold leaching solution obtained in step (1) is mixed with 10L / (m 2 The speed of h) is sprayed into the ore heap of step (2) to deposit copper. Wherein the obtained copper-containing cyanide gold immersion solution in the step (1) has a mass concentration of cyanide radical of 0.008%, a pH value of 9.5, copper-containing 150 mg / L, and gold-containing 0.21 mg / L.

[0030] (4) In ...

Embodiment 2

[0032] A gold mine contains 0.79g / t of gold and 0.083% of copper.

[0033] (1) The ore is crushed, the maximum particle size is controlled within 500mm, the ore is washed and heaped, and the alkalinity of the ore heap is adjusted to be 11, and the concentration is 1 / 10,000 of sodium cyanide solution with 15L / (m 2 • Spray the ore heap at a speed of h).

[0034] (2) When the gold ore heap is sprayed and leached to the middle stage, take part of the slag and build a heap with a height of 20 meters.

[0035] (3) the copper-containing cyanidation gold leaching solution obtained in step (1) is mixed with 13L / (m 2 The speed of h) is sprayed into the ore heap of step (2) to deposit copper. Wherein step (1) the cyanide mass concentration of the obtained copper-containing cyanidation gold immersion solution is 0.009%, pH value 9.0, containing copper 178mg / L, containing gold 0.28mg / L.

[0036] (4) In the cyanidation gold leaching solution after copper precipitation in the mine heap, t...

Embodiment 3

[0039] A gold mine contains 0.33g / t gold and 0.027% copper.

[0040] (1) The ore is crushed, the maximum particle size is controlled within 500mm, the ore is washed and piled up, and the alkalinity of the ore pile is adjusted to be 10, and the sodium cyanide solution with a mass concentration of 1 / 10,000 is used at a rate of 10L / (m 2 • Spray the ore heap at a speed of h).

[0041] (2) When the gold ore heap is sprayed and leached to the middle stage, take part of the slag and build a heap with a height of 15 meters.

[0042] (3) the copper-containing cyanidation gold leaching solution obtained in step (1) is mixed with 15L / (m 2 The speed of h) is sprayed into the ore heap of step (2) to deposit copper. Wherein step (1) the cyanide mass concentration of the obtained copper-containing cyanidation gold immersion solution is 0.008%, pH value 9.0, containing copper 159mg / L, containing gold 0.23mg / L.

[0043] (4) In the cyanidation gold leaching solution after copper precipitatio...

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Abstract

The invention relates to a copper deposition method for a copper-contained cyaniding leaching solution. The method mainly solves the problem of co-adsorption of copper ions in the cyaniding leaching solution and gold on activated carbon. According to the method, stock heap slag at the middle and later periods of dump leaching serves as a copper deposition carrier, the copper-contained cyaniding leaching solution is sprayed to a stock heap for stock heap copper deposition, and the copper deposition rate reaches 75% or above and is as high as 98%; the impurity ions in the copper-contained cyaniding leaching solution after copper deposition are reduced by 50-80%, gold is not lost, a barren liquor adding cyanide group left after adsorption of the activated carbon can return to the gold ore tobe subjected to dump leaching again, the leaching rate is improved by 3-5% through the above treatment, and cyclic use of the barren liquor is achieved at the same time. Any other drug or new equipment does not need to be added in the whole process, and the advantages of good copper deposition effect, high efficiency, large processing amount, simple process, easy operation, low cost and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for depositing copper in a copper-containing cyanide gold leaching solution. Background technique [0002] At present, cyanide gold extraction method is the most important method for extracting gold. However, the use of cyanide leaching for copper-bearing gold ores has problems such as large consumption of cyanide, and the competition and adsorption of copper ions and gold ions contained in the cyanidation gold leaching solution on activated carbon, which seriously reduces the ability of activated carbon to adsorb gold. It will adversely affect the subsequent desorption of gold-loaded carbon and gold smelting. [0003] In recent years, the methods developed to treat high-copper cyanidation gold leaching solutions mainly include hydrogen peroxide copper precipitation method, sulfuric acidification copper precipitation method and other treatment methods. For related te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08C22B3/44
CPCC22B3/44C22B11/08Y02P10/20
Inventor 余洪张汉泉蔡祥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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