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Method for preparing cupric sulfate from spongy copper and copper-containing acid pickle

A waste acid liquid and sponge copper technology, applied in the direction of copper sulfate, etc., can solve the problems of high impurity content, complex impurities in sponge copper and copper-containing waste acid liquid, etc., and achieve the effect of reasonable configuration, easy start-up and shutdown

Active Publication Date: 2008-07-02
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is exactly to the deficiency that above-mentioned prior art exists, provides a kind of sponge copper that can effectively overcome copper-nickel smelting and refining to produce and copper-containing waste acid The shortcomings of complex types of impurities and large impurity content in the liquid, and the effective comprehensive recycling of various valuable metals provide a method for preparing copper sulfate using sponge copper and copper-containing waste acid liquid produced by copper-nickel smelting and refining as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (Take a single 2t / d copper melting device as an example)

[0029] Will contain Cu: 62.6%, Ni: 3.2%, Fe: 0.05%, Pb: 0.02%, Ca: 0.32%, As: 0.35%, Sb: 0.026%, Bi: 0.019%, S: 2.5%, Cl: 2.2 % of the dry sponge copper is ground to -10 mesh (equivalent to 0.016mm) and accounts for 90%. It is continuously added with a screw feeder at a speed of 220kg / h, and pumped into the 2+ : 32g / l, containing H 2 SO 4 : 120g / l pre-leaching solution, with 0.65m 3 The speed of / h is continuously added to the copper melting vessel. The reaction temperature is controlled at about 80°C. Containing Cu by continuous leaching 2+ : 97g / l, H 2 SO 4 : 26g / l leach solution 0.65m 3 / h. After a filter press, add Na to the influent and effluent 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40-70°C, pH: 2.0. After the second pressure filtration, dilute with water to contain Cu 2+ : 63g / l, containing Ni 2+ : 20g / l, after three times of pressure filtration, the extr...

Embodiment 2

[0031] (Take a single 2t / d copper melting device as an example)

[0032] Will contain Cu: 60.5%, Ni: 3.5%, Fe: 0.06%, Pb: 0.02%, Ca: 0.13%, As: 0.4%, Sb: 0.024%, Bi: 0.025%, S: 2.8%, Cl: 2.3 % dry sponge copper ground to -10 mesh (equivalent to 0.016mm) accounted for 90%, with a screw feeder to continuously add at a speed of 230kg / h, pumped into the 2+ : 38g / l, containing H 2 SO 4 : 130g / l pre-leaching liquid, with 0.7m 3 The speed of / h is continuously added to the copper melting device. The reaction temperature is controlled at about 83°C. Containing Cu by continuous leaching 2+ : 95g / l, H 2 SO 4 : 32g / l leach solution 0.7m 3 / h. After a filter press, add Na to the influent and effluent 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40-70°C, pH: 1.6. After the second pressure filtration, dilute with water to contain Cu 2+ : 62g / l, containing Ni 2+ : 18g / l, after three times of pressure filtration, the extraction agent P 204 Carry o...

Embodiment 3

[0034] (Take a single 2t / d copper melting device as an example)

[0035] Will contain Cu: 62.3%, Ni: 3.1%, Fe: 0.05%, Pb: 0.03%, Ca: 0.16%, As: 0.56%, Sb: 0.027%, Bi: 0.029%, S: 3.3%, Cl: 2.4 % of the dry sponge copper is ground to -10 mesh (equivalent to 0.016mm), accounting for 90%, and is continuously added at a speed of 250kg / h with a screw feeder, and pumped into the 2+ : 32g / l, containing H 2 SO 4 : 140g / l pre-leaching liquid, with 0.8m 3 The speed of / h is continuously added to the copper melting vessel. The reaction temperature is controlled at about 78°C. Containing Cu by continuous leaching 2+ : 96g / l, H 2 SO 4 : 28g / l leach solution 0.8m 3 / h. After a filter press, add Na to the influent and effluent 2 CO 3 Neutralize and reduce acid, the process temperature is controlled at 40-70°C, pH: 1.5. After the second pressure filtration, dilute with water to contain Cu 2+ : 60g / l, containing Ni 2+ : 17g / l, after three times of pressure filtration, using extrac...

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PUM

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Abstract

The invention relates to a method for preparing copper sulfate by adopting sponge cooper and the waste acid liquid containing cooper as raw materials. The invention is characterized in that (1) sponge cooper and the cooper containing waste acid liquid, after acid adjustment, are emulsified and mixed; then leaching reaction is carried out; (2) the leached liquid is extracted by using P204, and then cooper and nickel are separated from part of impurities; (3) under the help of sulphuric acid, reverse extraction is carried out to the extraction liquid P204, the oil in the reverse extract liquid and extraction raffinate is removed; (4) cooper sulphate solution, after oil removal and purification, is concentrated by steam, crystallized and dried; then the final product cooper sulphate crystal is obtained. The method of the invention has the advantages of good separation effect of cooper and nickel, being capable of fully making use of nonferrous smelting intermediate residue with complex components and the waste acid liquid containing cooper to produce high quality cooper sulphate and reclaim valuable metal nickel, thus achieving resources comprehensive utilization.

Description

technical field [0001] The invention discloses a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid as raw materials, and relates to a method for preparing copper sulfate by using sponge copper and copper-containing waste acid liquid produced by copper-nickel smelting and refining as raw materials. Background technique [0002] At present, the main production processes for the production of copper sulfate are: 1. Using red copper as raw material, leaching with dilute sulfuric acid after being calcined into copper oxide, and then concentrating and crystallizing the solution to obtain copper sulfate; this method has a complicated process and labor-intensive Large, high energy consumption; 2. The production process of producing copper sulfate from copper sulfide ore, including mineral powder roasting, calcined copper leaching, cooling crystallization and other processes, the total yield of copper sulfate can reach more than 96%; 3....

Claims

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Application Information

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IPC IPC(8): C01G3/10
Inventor 卓文赵忠谈宏叶先英
Owner JINCHUAN GROUP LIMITED
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