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Gold extracting process for high arsenic gold mine

A technology of gold ore and process, which is applied in the field of gold extraction process of high-arsenic gold ore, can solve the problems that high-arsenic gold ore is difficult to develop, and achieve the effects of shortening oxidation time, less investment in equipment, and increasing oxidation rate

Inactive Publication Date: 2005-10-19
莱州泰源冶金技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a gold extraction process for high-arsenic gold ore, which mainly solves the problem that the existing high-arsenic gold ore is difficult to develop

Method used

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  • Gold extracting process for high arsenic gold mine
  • Gold extracting process for high arsenic gold mine
  • Gold extracting process for high arsenic gold mine

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1, in No. 1 reactor, inject clear water, charge into air, adjust PH=1.4, add (NH 4 ) 2 SO 4 、K 2 HPO 4 , MgSO 4 Wait for the medium, the temperature is 30 ℃, add ferrous sulfate, under the action of bacteria, Fe 2+ oxidized to Fe 3+ , so that Fe in the reactor 3+ Concentration gradually increased to 39g / l to ensure a higher concentration of Fe was delivered to No. 2 reactor 3+ , which is beneficial to the subsequent high-iron pre-oxidation reaction; add gold tooth gold concentrate to No. 2 reactor, and extract Fe from No. 1 reactor 3+ Enter No. 2 reactor, its volume is solid: liquid=4: 6, and reaction temperature is 55 ℃, guarantees that ore pulp does not precipitate, and stirring speed is 75 rev / mins, and reaction time is 5 hours; The product after reaction enters No. 3 reactor , the solid enters the subsequent process, and the liquid contains a large amount of As 3+ , Fe 2+ , and return to No. 1 reactor for pretreatment, since Fe2+ is continuously...

Embodiment 2

[0018] Embodiment 2, in No. 1 reactor, inject clear water, charge into air, adjust PH=1, add (NH 4 ) 2 SO 4 、K 2 HPO 4 , MgSO 4 Wait for the medium, the temperature is 20 ℃, add ferrous sulfate, under the action of bacteria, Fe 2+ oxidized to Fe 3+ , so that Fe in the reactor 3+ Concentration is gradually increased to 38g / l to ensure the delivery of higher concentration of Fe to No. 2 reactor 3+ , which is beneficial to the subsequent high-iron pre-oxidation reaction; add gold tooth gold concentrate to No. 2 reactor, and extract Fe from No. 1 reactor 3+ Enter No. 2 reactor, its volume is solid: liquid=4: 6, and reaction temperature is 50 ℃, guarantees that ore pulp does not precipitate, and stirring speed is 50 rev / mins, and reaction time is 4 hours; The product after reaction enters No. 3 reactor , the solid enters the subsequent process, and the liquid contains a large amount of As 3+ , Fe 2+ , return to No. 1 reactor for pretreatment, due to continuous extraction ...

Embodiment 3

[0019] Embodiment 3, in No. 1 reactor, inject clear water, charge into air, adjust PH=2, add (NH 4 ) 2 SO 4 、K 2 HPO 4 , MgSO 4 Wait for the culture medium, the temperature is 40 ℃, add ferrous sulfate, under the action of bacteria, Fe 2+ oxidized to Fe 3+ , so that Fe in the reactor 3+ The concentration is gradually increased to 40g / l to ensure that a higher concentration of Fe is delivered to the No. 2 reactor 3+ , which is beneficial to the subsequent high-iron pre-oxidation reaction; add gold tooth gold concentrate to No. 2 reactor, and extract Fe from No. 1 reactor 3+ Enter No. 2 reactor, its volume is solid: liquid=4: 6, and reaction temperature is 60 ℃, guarantees that ore pulp does not precipitate, and stirring speed is 100 rev / mins, and reaction time is 6 hours; The product after reaction enters No. 3 reactor , the solid enters the subsequent process, and the liquid contains a large amount of As 3+ , Fe 2+ , return to No. 1 reactor for pretreatment, due to c...

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Abstract

The present invention discloses a kind gold extracting process from high arsenic gold ore. High arsenic gold ore is first high iron pre-treated to make As content lowered to below 8 %, reaching the requirement of bacteria oxidation to extracting gold, and then gold is extracted biologically. The present invention has simple and effective technological process, can oxidize toxic sand in raw ore in short time and has low apparatus investment.

Description

(1) Technical field: [0001] The invention relates to the technical field of gold extraction of gold ores, in particular to a gold extraction process of high-arsenic gold ores. (two) background technology: [0002] At present, with the development of the metallurgical industry, most of the easy-to-select metallurgical resources have been utilized, and the difficult-to-select metallurgical resources are difficult to develop due to the lack of relevant technologies. The proven high-arsenic gold ore resources in my country have large reserves, wide distribution, and broad development prospects. . Gold in refractory metallurgical concentrates is mainly wrapped by metal minerals such as pyrite and arsenopyrite. It is difficult to dissociate gold particles by ordinary methods such as mechanical grinding, and the recovery rate of direct cyanide is generally only between 5% and 50%. For the time being, the biological gold extraction process can only adapt to ore bodies with a single ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 何勇军仲维功张耀军田立国公锡泰张范新王大文李春强
Owner 莱州泰源冶金技术有限公司
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