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Method of efficiently separating and recovering arsenic, copper and zinc from arsenic-copper-containing smelting smoke dust pickle liquor

A technology of copper smelting and acid leaching solution, which is applied in the field of high-efficiency separation and recovery of arsenic and zinc in acid leaching solution of copper and arsenic-containing copper smelting dust, which can solve the problems of difficult separation, pollution of ecological environment by arsenic-containing hazardous waste residue, and low added value. , to achieve the effect of flexible operation, strong adaptability of raw materials and high added value

Pending Publication Date: 2019-06-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the difficulty in separating arsenic, copper, and zinc in the arsenic-containing copper smelting fume acid leaching solution in the prior art. When recycling copper, zinc and other non-ferrous metals, arsenic seriously pollutes copper and zinc products, resulting in extremely low added value and highly toxic AsH 3 Gas and a large amount of arsenic-containing hazardous waste residues pollute the ecological environment, etc., and provide a method for efficient separation and recovery of arsenic, copper, and zinc in acid leaching solution of arsenic-containing copper smelting dust

Method used

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  • Method of efficiently separating and recovering arsenic, copper and zinc from arsenic-copper-containing smelting smoke dust pickle liquor
  • Method of efficiently separating and recovering arsenic, copper and zinc from arsenic-copper-containing smelting smoke dust pickle liquor

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the method for efficiently separating and recovering arsenic, copper, and zinc from acid leaching solution of arsenic-containing copper smelting dust mainly includes the following steps:

[0030] Step 1. Pour SO into the acid leaching solution of copper smelting dust containing arsenic (8.3g / L copper, 36.4g / L zinc, 120g / L arsenic, pH=1) 2 Reduce precipitation of arsenic, filter to obtain crystals and crystallization mother liquor; pass in SO 2 The specific process of reducing and precipitating arsenic is as follows: at a temperature of 85°C, a flow of 60L / min of SO is introduced into the acid leaching solution of arsenic copper smelting dust 2 Gas, reduce precipitation for 30 minutes, obtain crystals and crystal mother liquor after filtration;

[0031] Step 2. Use organic solvent extraction and stripping to recover copper from the crystallization mother liquor obtained in Step 1 to obtain copper product and copper extraction residue; the extraction ...

Embodiment 2

[0035] Such as figure 1 As shown, the method for efficiently separating and recovering arsenic, copper, and zinc from acid leaching solution of arsenic-containing copper smelting dust mainly includes the following steps:

[0036] Step 1. Pour SO into the acid leaching solution of copper smelting dust containing arsenic (1g / L copper, 5g / L zinc, 15g / L arsenic, pH=3) 2 Reduce precipitation of arsenic, filter to obtain crystals and crystallization mother liquor; pass in SO 2 The specific process of reducing and precipitating arsenic is as follows: at a temperature of 20°C, a flow of 5L / min of SO is introduced into the acid leaching solution of arsenic copper smelting dust 2 Gas, reduce precipitation for 240min, obtain crystals and crystal mother liquor after filtration;

[0037] Step 2. Use organic solvent extraction and stripping to recover copper from the crystallization mother liquor obtained in Step 1 to obtain copper product and copper extraction residue; the extraction process is:...

Embodiment 3

[0041] Such as figure 1 As shown, the method for efficiently separating and recovering arsenic, copper, and zinc from acid leaching solution of arsenic-containing copper smelting dust mainly includes the following steps:

[0042] Step 1. Pour SO into the acid leaching solution of copper smelting dust containing arsenic (50g / L copper, 50g / L zinc, 64g / L arsenic, pH=2) 2 Reduce precipitation of arsenic, filter to obtain crystals and crystallization mother liquor; pass in SO 2 The specific process of reducing and precipitating arsenic is as follows: at a temperature of 50°C, a flow of 30L / min of SO is introduced into the acid leaching solution of arsenic copper smelting dust 2 Gas, reduce precipitation for 120min, obtain crystals and crystal mother liquor after filtration;

[0043] Step 2. Use organic solvent extraction-reverse extraction to recover copper from the crystallization mother liquor obtained in Step 1 to obtain copper product and copper extraction residue; the extraction pro...

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Abstract

The invention relates to a method of efficiently separating and recovering arsenic, copper and zinc from arsenic-copper-containing smelting smoke dust pickle liquor, and belongs to the technical fieldof wet-process metallurgy and environmental protection. The method comprises the steps that SO2 is filled into the arsenic-copper-containing smelting smoke dust pickle liquor for carrying out reduction and settlement of the arsenic, filtering is carried out, and a crystal and crystallized mother liquor are obtained; the crystallized mother liquor is subjected to organic solvent extraction-reverseextraction to recover the copper, and a copper product and extracted copper residual liquor are obtained; and the obtained extracted copper residual liquor is subjected to the organic solvent extraction-reverse extraction to recover the zinc, a zinc product and extracted zinc residual liquor are obtained, and arsenic-copper-containing smelting smoke dust is leached through the extracted zinc residual liquor. The arsenic, copper and zinc are separated and recovered from the arsenic-copper-containing smelting smoke dust pickle liquor with the adoption of a mode that gas reduction and solvent extraction are organically combined, the method is high in separation efficiency and recovery efficiency, the situation that the ecological environment is polluted due to the fact that arsenic-containing hypertoxic gas and arsenic-containing dangerous waste residues are produced is avoided, the copper product and the zinc product do not contain the arsenic, and the additional value is high.

Description

Technical field [0001] The invention relates to a method for efficiently separating and recovering arsenic, copper and zinc from an acid leaching solution of arsenic-containing copper smelting dust, and belongs to the technical field of hydrometallurgy and environmental protection. Background technique [0002] Copper has excellent physical and chemical properties and is an important material basis for social development. More than 85% of the world’s copper is produced by pyrometallurgical smelting. During the production process, about 10% of the refined copper output will be produced. The fume contains copper, zinc, lead, tin, bismuth, indium, cadmium, arsenic and other metals. , Has important comprehensive recycling value. [0003] The hydrometallurgical process is one of the main methods for the treatment of copper smelting fumes. This method generally uses sulfuric acid solution to extract valuable metals such as copper, zinc, cadmium, and indium. At the same time, arsenic is ...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B3/38C22B3/40C22B3/30C22B15/00C22B19/20C22B19/30C22B30/04
CPCY02P10/20
Inventor 金炳界张玉慧孙保华王成彦
Owner KUNMING UNIV OF SCI & TECH
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