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Method for deeply removing arsenic from copper sulfate solution

A copper sulfate solution, deep technology, applied in the direction of improving process efficiency, etc., can solve the problems of restricting product use, complex arsenic existence, narrow application range, etc.

Active Publication Date: 2009-08-19
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The inclusion of arsenic in the product will affect the color and performance of the product and limit the use of the product. At the same time, arsenic is a highly toxic substance that will cause harm to human health during processing and use.
The existence of arsenic in materials and products is complicated, and it is difficult to remove and purify deeply. The existing methods for removing arsenic mainly include extraction method, resin method, phosphating method, etc., but these methods have narrow application range, long process, high cost, and easy Introduce disadvantages such as other impurities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 1L of copper sulfate solution (Cu: 120g / L As: 0.26g / L) and add 0.39g of jarosite slag, adjust the pH to 0.5 with 80g / L sodium carbonate solution, raise the temperature to 70°C, and then add 0.43g of Sodium chlorate, keep warm and oxidize for 1 hour, use 40g / L sodium carbonate to adjust the pH to 2.5, then use 15g / L ammonium bicarbonate to adjust the pH to 3.5, after cooling and filtering, the filtrate composition Cu: 108.31g / L As: 0.00091g / L.

Embodiment 2

[0016] Take 1L of copper sulfate solution (Cu: 80g / L As: 0.18g / L) and add 0.72g of jarosite slag, adjust the pH to 2 with 120g / L sodium carbonate solution, raise the temperature to 100°C, and then add 1.26g of Sodium chlorate, keep warm and oxidize for 1 hour, use 60g / L sodium carbonate to adjust the pH to 3, then use 30g / L ammonium bicarbonate to adjust the pH to 5, after cooling and filtering, the filtrate composition Cu: 73.43g / L As: 0.0011g / L.

Embodiment 3

[0018] Take 1L of copper sulfate solution (Cu: 89.07g / L As: 0.22g / L) and add 0.47g of jarosite slag, adjust the pH to 0.5 with 93.2g / L sodium carbonate solution, raise the temperature to 100°C, and then add 0.62 g of sodium chlorate, keep warm and oxidize for 1 hour, use 46.6g / L sodium carbonate to adjust the pH to 2.5, then use 28.9g / L ammonium bicarbonate to adjust the pH to 3.5, after cooling and filtering, the filtrate component Cu: 87.62g / L As: 0.00087g / L.

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PUM

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Abstract

The present invention relates to dearsenifying process to eliminate arsenic impurity chemically in wet metallurgy, and is especially process of dearsenifying copper sulfate solution. The copper sulfate solution dearsenifying process includes adding natrojarosite slag into copper sulfate solution, regulating pH to 0.5-2, heating to 70-100 deg.c, adding oxidant and maintaining the temperature to oxidize for 0.5-3 hr, regulating pH to 3.5-5, reacting for 10-30 min and filtering to obtain dearsenified copper sulfate solution. During the process, the Fe3+ and Fe2+ ions of natrojarosite slag are dispersed in the solution and converted into Fe(OH)3 colloid with strong adsorption capacity to eliminate arsenic and other impurities from the solution. The process has short period, low cost, no introduction of other impurity and high dearsenifying.

Description

technical field [0001] A method for deeply removing arsenic in a copper sulfate solution relates to a method for removing arsenic in hydrometallurgy, and is suitable for chemically removing impurity materials with high arsenic content, especially the arsenic content in copper sulfate solution. The arsenic removal agent used in the arsenic removal is the jarosite waste slag produced in the non-ferrous metal smelting process, and there is no need to use pure chemical reagents. Background technique [0002] The inclusion of arsenic in the product will affect the color and performance of the product and limit the use of the product. At the same time, arsenic is a highly toxic substance that will cause harm to human health during processing and use. The existence of arsenic in materials and products is complicated, and it is difficult to remove and purify deeply. The existing methods for removing arsenic mainly include extraction method, resin method, phosphating method, etc., bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B3/22
CPCY02P10/20
Inventor 汪锦瑞李娟
Owner JINCHUAN GROUP LIMITED
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