Method for recycling gold from gold-containing pregnant solution

A technology for recovering gold and precious liquid, applied in the field of gold recovery, can solve the problems of reducing the grade of gold mud, affecting the effect of zinc powder replacement, reducing the replacement recovery rate, etc., and achieve the effects of improving production quality, improving process production efficiency, and increasing replacement efficiency

Inactive Publication Date: 2020-06-12
ZHAOJIN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the long-term recycling of the poor solution (i.e. cyanide-containing wastewater), under the action of various chemicals, a large amount of impurit

Method used

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  • Method for recycling gold from gold-containing pregnant solution
  • Method for recycling gold from gold-containing pregnant solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a kind of method that recovers gold from precious liquid containing gold, and it comprises the steps:

[0038] S1. Preparing precious liquid: said step S1 comprises the following steps:

[0039] S11. Grinding the gold-containing ore, and then performing press filtration and pulping to obtain a slurry with a pH value of 10;

[0040] S12. Add sodium cyanide to the sizing liquid obtained in step S11 for leaching reaction, and obtain leaching pulp, then perform dense washing and solid-liquid separation on the leaching pulp in sequence, and the obtained liquid is precious liquid, which is set aside.

[0041] S2. Purifying the precious liquid: at a temperature of 20°C, add the precious liquid prepared in step S1 into a filter press for impurity removal treatment to obtain purified precious liquid;

[0042] S3. Precious liquid deoxidation treatment: adding the precious liquid purified in step S2 into a deoxidation tower for deoxidation treatmen...

Embodiment 2

[0046] The present embodiment provides a kind of method that recovers gold from precious liquid containing gold, and it comprises the steps:

[0047] S1. Preparing precious liquid: said step S1 comprises the following steps:

[0048] S11. Grinding the gold-containing ore, and then performing press filtration and pulping to obtain a slurry with a pH value of 11;

[0049] S12. Add sodium cyanide to the sizing liquid obtained in step S11 for leaching reaction, and obtain leaching pulp, then perform dense washing and solid-liquid separation on the leaching pulp in sequence, and the obtained liquid is precious liquid, which is set aside.

[0050] S2. Purifying the precious liquid: at a temperature of 15°C, add the precious liquid prepared in step S1 into a filter press for impurity removal treatment to obtain purified precious liquid;

[0051] S3. Precious liquid deoxidation treatment: adding the precious liquid purified in step S2 into a deoxidation tower for deoxidation treatmen...

Embodiment 3

[0055] The present embodiment provides a kind of method that recovers gold from precious liquid containing gold, and it comprises the steps:

[0056] S1. Preparing precious liquid: said step S1 comprises the following steps:

[0057] S11. Grinding the gold-containing ore, and then performing pressure filtration and pulping to obtain a slurry with a pH value of 12;

[0058] S12. Add calcium cyanide to the sizing liquid obtained in step S11 for leaching reaction, and obtain leaching pulp, then perform dense washing and solid-liquid separation on the leaching pulp in sequence, and the obtained liquid is noble liquid, which is set aside.

[0059] S2. Purifying the precious liquid: at a temperature of 25°C, adding the precious liquid prepared in step S1 into a filter press for impurity removal treatment to obtain purified precious liquid;

[0060] S3. Precious liquid deoxidation treatment: adding the precious liquid purified in step S2 into a deoxidation tower for deoxidation trea...

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Abstract

The invention relates to a method for recycling gold from a gold-containing pregnant solution, and belongs to the technical field of metallurgy. The method comprises the following steps of S1, preparing the pregnant solution; S2, purifying the pregnant solution; S3, conducting deoxidation on the pregnant solution; S4, pretreating the pregnant solution, wherein the pregnant solution which is obtained after deoxidation treatment in S3, sodium hydroxide, sodium sulfide and ammonium bicarbonate are mixed to prepare a solution, the solution is adjusted to be alkaline, and then uniform stirring is conducted to obtain a pretreated pregnant solution; and S5, conducting replacement on the pregnant solution, wherein the pretreated pregnant solution obtained in S4 and zinc powder are added into a replacer for a replacement rection, and then solid-liquid separation is conducted to obtain a solid, namely the product. According to the method, by adding the agents sodium hydroxide, sodium sulfide andammonium bicarbonate into the pregnant solution, impurity ions in the pregnant solution can be effectively removed, the possible influence on the zinc powder is lowered, the replacement efficiency ofthe zinc powder is improved, the production quality of gold mud is improved, and the production efficiency of the process is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for recovering gold from precious liquid containing gold. Background technique [0002] Gold is one of the rarer, more precious and highly valued metals. Gold is not only a special currency for reserves and investment, but also an important material for jewelry, electronics, modern communications, and aerospace industries. [0003] At present, the traditional method of producing gold is to use gold concentrate cyanide gold extraction process. The general flow of the cyanidation gold extraction process is: (1) Grinding the gold concentrate to a predetermined fineness of ore powder, and then performing pressure filtration on the ore powder to obtain a slurry; (2) Cyanide leaching of the slurry , to obtain the leaching slurry, and then transport the leaching slurry to the dense washing section for washing to obtain tailings and overflow liquid; (3) carry out tailing tre...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B3/46C22B11/08
CPCC22B3/44C22B3/46C22B11/04C22B11/08Y02P10/20
Inventor 徐怀浩李雪林李建辉国洪柱李俊杰纪韶红
Owner ZHAOJIN MINING
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