Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor

A technology for extracting gold waste liquid and biological oxidation, applied in chemical instruments and methods, iron oxide, arsenic compounds, etc., can solve problems such as waste of resources and achieve the effect of perfect process

Active Publication Date: 2007-09-26
LIAONING TIANLI GOLD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Daily discharge of 500-600m of acidic bio-oxidation gold extraction waste liquid in a bio-oxidation gold extraction plant that processes 100 tons of gold concentrate per day 3 Every year, nearly 1400-1700 tons of arsenic and 4000-8000 tons of iron are thrown away for nothing, resulting in a great waste of resources

Method used

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  • Method for reclaiming valuable element from acidic arsenic-containing biological oxidation gold extraction waste liquor

Examples

Experimental program
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Effect test

example 1

[0021] 1. Treat 250m per day 3 Take bio-oxidation gold extraction waste liquid (the main element Fe content is 24g / L, As content is 5g / L) as an example, the recovery process of its valuable elements is: alkali is used as medicine, and 8mol L -1 The alkali solution is used as a precipitant, and the acidic arsenic-containing bio-oxidation gold extraction waste liquid and precipitant are added to the reactor at the same time, and the flow rate of the bio-oxidation solution is adjusted to 10.5m 3 / h, the flow rate of precipitant is about 5.6m 3 / h, and subject to the control of pH=12.5 in the reactor, adjust the flow rate of the precipitant at any time, the reaction temperature is 10°C, and the stirring intensity is 500rpm / min for the separation of arsenic and iron;

[0022] 2. Use filtration or centrifugal separation technology to separate solid and liquid, the solid phase enters the iron red preparation process, and the arsenic-containing liquid enters the arsenic recovery proc...

example 2

[0028] 1. Treat 500m per day 3 Take bio-oxidation gold extraction waste liquid (main element Fe content is 36g / L, As content is 7.5g / L) as an example, the recovery process of its valuable elements is as follows: alkali is used as a drug, and 10mol L -1 The alkali solution is used as a precipitant, and at the same time, acidic arsenic-containing bio-oxidation gold extraction waste liquid and precipitant are added to the reactor, and the flow rate of the bio-oxidation solution is adjusted to 21m 3 / h, the flow rate of precipitant is about 11m 3 / h, and subject to controlling pH=13.5 in the reactor, adjust the flow rate of the precipitant at any time, the reaction temperature is 40°C, and the stirring intensity is 700rpm / min to separate arsenic and iron;

[0029] 2. Use filtration or centrifugal separation technology to separate solid and liquid, the solid phase enters the iron red preparation process, and the arsenic-containing liquid enters the arsenic recovery process;

[00...

example 3

[0035] 500m per day 3 Bio-oxidation waste liquid (main element Fe content is 45g / L, As content is 8.5g / L) as an example. The recovery process of its valuable elements is: alkali is used as a drug, and 10mol L is prepared -1 alkaline solution as a precipitant. At the same time, add acidic arsenic-containing biological oxidation gold extraction waste liquid and precipitant to the reactor, and adjust the flow rate of biological oxidation liquid to 21m 3 / h, the flow rate of precipitant is about 12m 3 / h, and subject to the control of pH=13.5 in the reactor, adjust the flow rate of the precipitant at any time, the reaction temperature is 60°C, the stirring intensity is 800rpm / min, and the separation of arsenic and iron is carried out;

[0036] 2. Use filtration or centrifugal separation technology to separate solid and liquid, the solid phase enters the iron red preparation process, and the arsenic-containing liquid enters the arsenic recovery process;

[0037] 3. After the so...

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PUM

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Abstract

The invention discloses a reclaiming method of valency element from acidic rocan biological oxidation extract gold waste liquid, which comprises the following steps: adding acidic rocan biological oxidation extract gold waste liquid and precipitant into autoclave at the same time; depositing selectively; realizing arsenic iron separation; adopting filtering technology; realizing solid and liquid separation; leading solid phase into iron-oxide red preparing process; leading liquid into process of reclaiming rocan; adjusting the solution to neutral with solid-liquid; condensing at 0-4 deg.c; crystallizing to Na2SO4.10H2O; returning the tail liquid to the first process; using to formulating queous alkali. The good effect of this invention can realize effective segregation of rocan and iron of acidic rocan biological oxidation extract gold waste liquid.

Description

technical field [0001] The invention relates to a technology for extracting valuable elements from acidic arsenic-containing biological oxidation gold extraction waste liquid. Background technique [0002] At present, there are many domestic production plants using bio-oxidation gold extraction technology, becoming the country with the most bio-oxidation gold extraction plants in the world. [0003] However, a large amount of arsenic-containing acidic bio-oxidation gold extraction process produces a large amount of arsenic-containing acidic bio-oxidation gold extraction liquid. The pH value of this type of biological oxidation liquid is 0.6-1.8. 3 The oxidizing solution can contain (25-45) kg of iron and about 8 kg of arsenic and a small amount of elements such as copper, zinc, and lead. Arsenic compounds are protoplasmic poisons with a wide range of biological effects, and have been identified as the first class of carcinogens by the International Agency for Cancer Researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C01G49/06C01D5/00C01G28/00C22B30/04C02F103/16
Inventor 田彦文阎铁石高金昌郭普金具滋范阎增范金世斌李建中张心新左玉明
Owner LIAONING TIANLI GOLD
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