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Method for treating cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas

A technology for extracting gold waste liquid and acid waste gas, which is applied in waste gas treatment and environmental protection in the chemical industry, and in the field of gold smelting. It can solve the problems of environmental hazards, poor treatment effects, and high treatment costs, so as to reduce pollution hazards and eliminate treatment costs. High, improve the effect of economic benefits

Inactive Publication Date: 2014-02-05
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, in the sulfuric acid production and gold smelting industries, the roasting acid production process is mainly to process sulfur-containing minerals and produce smelting flue gas that meets the requirements of acid production. The acid production waste tail gas produced after acid production is usually discharged at high altitude or simply Discharge after treatment by tail gas purification treatment device; the cyanidation gold extraction process in gold smelting is to use the direct cyanidation method or roasting oxidation pretreatment of gold-bearing minerals to produce gold-bearing calcine through acid leaching, alkali leaching, cyanidation The method of extracting gold and silver, gold and silver are dissolved in the cyanide solution, and after the zinc powder replacement process, the alkaline cyanide gold extraction waste liquid is produced, which is usually treated by direct exposure to the sun or acidification in the exposure pool, and the treatment cost is relatively high, and The treatment effect is not good, causing harm to the surrounding environment, so higher requirements are put forward

Method used

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  • Method for treating cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The first step, sulfur-containing mineral roasting

[0025] Configure 22% sulfur-containing minerals or polymetallic sulfide minerals into the roasting furnace, wherein the polymetallic sulfide minerals can include copper, zinc, gold, silver, etc., and roast to obtain roasting flue gas and calcined sand after roasting. The roasting flue gas is discharged from the flue of the roaster, and then enters the first-level cooling dust collector and the second-level cooling dust collector in turn, the roasting flue gas in the first-level cooling dust collector and the dust-containing smoke in the second-level cooling dust collector The gas is further purified and dedusted through electrostatic dedusting, washing, and electrostatic demisting, and the calcined sand after the roasting enters the corresponding extraction process;

[0026] The second step, acid production tail gas

[0027] After purification and dust removal of the output SO 2 Dried SO 2 , two conversions of SO ...

Embodiment 2

[0033] The first step, sulfur-containing mineral roasting

[0034] Configure 23% sulfur-containing minerals or polymetallic sulfide minerals into the roasting furnace, wherein the polymetallic sulfide minerals can include copper, zinc, gold, silver, etc., and roast to obtain roasting flue gas and calcined sand after roasting. The roasting flue gas is discharged from the flue of the roaster, and then enters the first-level cooling dust collector and the second-level cooling dust collector in turn, the roasting flue gas in the first-level cooling dust collector and the dust-containing smoke in the second-level cooling dust collector The gas is further purified and dust-removed through electric dust removal, washing, and electric defogging, and the roasted sand enters the corresponding extraction process.

[0035] The second step, acid production tail gas

[0036] After purification and dust removal of the output SO 2 Dried SO 2 , two conversions of SO 2 And secondary absorpt...

Embodiment 3

[0042] The first step, sulfur-containing mineral roasting

[0043] Configure 25% sulfur-containing minerals or polymetallic sulfide minerals into the roasting furnace, wherein the polymetallic sulfide minerals can include copper, zinc, gold, silver, etc., and roast to obtain roasting flue gas and calcined sand after roasting. The roasting flue gas is discharged from the flue of the roaster, and then enters the first-level cooling dust collector and the second-level cooling dust collector in turn, the roasting flue gas in the first-level cooling dust collector and the dust-containing smoke in the second-level cooling dust collector The gas is further purified and dust-removed through electric dust removal, washing, and electric defogging, and the roasted sand enters the corresponding extraction process.

[0044] The second step, acid production tail gas

[0045] After purification and dust removal of the output SO 2 Dried SO 2 , two conversions of SO 2 And secondary absorpt...

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Abstract

The invention relates to a method for treating the cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas, belonging to the technical field of gold smelting, waste gas treatment of chemical industry and environmental protection. The method for treating the cyaniding gold extraction waste liquid to recover gold, silver and copper by use of acid making waste gas provided by the invention comprises the following steps: roasting a sulfur-containing mineral; making acid to generate acid making tail gas; roasting gold concentrate or gold-containing sulfide mineral, and performing roasted sand cyaniding gold extraction to generate cyaniding gold extraction waste liquid; and treating the cyaniding gold extraction waste liquid by use of the acid making tail gas. The method provided by the invention makes use of smoke acid making tail gas and cyaniding gold extraction waste liquid, the valuable elements gold, silver and copper in the cyaniding gold extraction waste liquid are recovered after acid-base neutralization precipitation, and the pollution of the surrounding environment caused by the cyanogen-containing sewage is eliminated; moreover, after being treated, the cyaniding gold extraction waste liquid returns to the system for recycling, thereby improving the comprehensive utilization of resources.

Description

technical field [0001] The invention relates to a method for recovering gold, silver and copper from acid-making waste gas to treat cyanidation gold extraction waste liquid, and belongs to the technical fields of gold smelting, chemical industry waste gas treatment and environmental protection. Background technique [0002] In recent years, in the sulfuric acid production and gold smelting industries, the roasting acid production process is mainly to process sulfur-containing minerals and produce smelting flue gas that meets the requirements of acid production. The acid production waste tail gas produced after acid production is usually discharged at high altitude or simply Discharge after treatment by tail gas purification treatment device; the cyanidation gold extraction process in gold smelting is to use direct cyanidation method or roasting oxidation pretreatment on gold-bearing minerals to produce gold-bearing calcine through acid leaching, alkali leaching, cyanidation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08C22B3/46C22B15/00
CPCY02P10/20
Inventor 王建政吕寿明梁志伟郭建东程泰
Owner SHANDONG GUODA GOLD
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