Arsenic removal method for arsenic-fixing copper-containing slag

A copper slag and arsenic removal technology, which is applied in the field of metallurgy, can solve the problems of arsenic-fixed copper slag cleaning, high-efficiency arsenic removal, etc., and achieve shortened arsenic extraction technology, broad market application prospects, high economic benefits and environmental protection benefit effect

Inactive Publication Date: 2019-03-29
郴州金铖环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for removing arsenic from arsenic-fixed copper-containing slag, the purpose of which is to solve the problem of difficult clean and efficient arsenic removal

Method used

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  • Arsenic removal method for arsenic-fixing copper-containing slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Take 100g of arsenic-fixed copper-containing slag (dry basis), which contains As10.56%, Cu9.14%, Fe7.73%, Pb15.0%, and leaching solution 500g (containing arsenic 12.7g / L), with Concentrated sulfuric acid is used to adjust the acidity to 150g / L. Mix the arsenic-fixed copper-containing slag with the leaching solution into a 2L beaker;

[0031] (2) Start the electric stirring, and connect the air duct, and continuously inject SO 2 Gas, heated to 80°C, maintained at a constant temperature for 1.5 hours, then filtered while hot to obtain lead slag and filtrate;

[0032] (3) Lead slag is sent to lead smelting system, feeds hydrogen sulfide gas in filtrate, every 30min detects the copper content in the filtrate, stops aeration when copper content<0.02g / L in the filtrate, carries out filtration again, obtains Copper slag and mother liquor;

[0033] (4) Send the copper slag to the copper smelting system. After the mother liquor is crystallized, arsenic oxide is precipitat...

Embodiment 2

[0036] (1) Take 100g of arsenic-fixed copper-containing slag (dry basis), which contains As10.56%, Cu9.14%, Fe7.73%, Pb15.0%, and 600g of leachate (containing arsenic 12.7g / L). Concentrated sulfuric acid is used to adjust the acidity to 160g / L. Mix the arsenic-fixed copper-containing slag with the leaching solution into a 2L beaker;

[0037] (2) Start the electric stirring, and connect the air duct, and continuously inject SO 2 Gas, heated to 85°C, maintained at a constant temperature for 1.6 hours, then filtered while hot to obtain lead slag and filtrate;

[0038] (3) Lead slag is sent to lead smelting system, feeds hydrogen sulfide gas in filtrate, every 30min detects the copper content in the filtrate, stops aeration when copper content<0.02g / L in the filtrate, carries out filtration again, obtains Copper slag and mother liquor;

[0039] (4) Send the copper slag to the copper smelting system. After the mother liquor is crystallized, arsenic oxide is precipitated. After c...

Embodiment 3

[0042] (1) Take 100g of arsenic-fixed copper-containing slag (dry basis), which contains As10.56%, Cu9.14%, Fe7.73%, and Pb15.0%, and 800g of leaching solution (containing arsenic 12.7g / L). Concentrated sulfuric acid is used to adjust the acidity to 160g / L. Mix the arsenic-fixed copper-containing slag with the leaching solution into a 2L beaker;

[0043] (2) Start the electric stirring, and connect the air duct, and continuously inject SO 2 Gas, heated to 90°C, maintained at a constant temperature for 1.5 hours, then filtered while hot to obtain lead slag and filtrate;

[0044] (3) Lead slag is sent to lead smelting system, feeds hydrogen sulfide gas in filtrate, detects the copper content in filtrate once every 30min, stops aerating when copper content<0.02g / L in filtrate and carries out filtration treatment again, obtains Copper slag and mother liquor;

[0045] (4) The copper slag is sent to the copper smelting system, the mother liquor is crystallized to precipitate arse...

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Abstract

The invention provides an arsenic removal method for arsenic-fixing copper-containing slag. The method comprises the following steps that the arsenic-fixing copper-containing slag and the leaching liquid are mixed according to the mass ratio of 1:5-8 so as to obtain ore pulp; the sulfur dioxide reduction treatment is carried out on the obtained ore pulp; then, filtering is carried out so as to obtain lead slag and filtrate; the lead slag is fed into a fusing system for fusing, and vulcanization and copper precipitation treatment is carried out on the obtained filtrate to obtain copper slag andmother liquor; and the obtained copper slag enters a smelting system for smelting, the obtained mother liquor is subjected to crystallization treatment to precipitate arsenic oxide, and finally, purification treatment is carried out on the arsenic oxide. According to the arsenic removal method for the arsenic-fixing copper-containing slag, efficient arsenic removal from the arsenic-fixing copper-containing slag can be realized, and valuable metals such as copper and lead in the arsenic-fixing copper-containing slag are effectively recycled; and the method has the advantages that energy consumption is low, pollutant emission is avoided, and the method has relatively high economic benefit and environmental protection benefit.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for removing arsenic from arsenic-fixed copper-containing slag. Background technique [0002] The arsenic matte that appears in the copper smelting process, under acidic and oxygen pressure conditions, reacts with arsenic by adding iron powder to form iron arsenate (scorrodite), which is stable under low acid conditions, to precipitate arsenic. Copper is leached to the liquid phase, so as to achieve the purpose of separating copper and arsenic. This process is widely used. The produced copper- and lead-containing arsenic-fixed slag contains 10.56% arsenic, 9.14% copper, 7.73% iron, and 15.0% lead. [0003] Because the slag contains high copper and lead, it also has high added value, but it must be de-arsenized before it can be further recycled, enriched and utilized. At present, the methods for removing arsenic from slag are mainly wet method and fire method. Since ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B30/00C22B15/00C22B13/00
CPCC22B7/007C22B13/045C22B15/0093C22B30/04Y02P10/20
Inventor 范运行郭波平
Owner 郴州金铖环保科技有限公司
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