Technology for treating high-arsenic copper material

A copper material and process technology, which is applied in the field of processing high-arsenic copper materials, can solve the problems of easy explosion, reduce the efficiency of swirl electrolysis and affect the quality of cathode copper products, etc., and achieve convenient operation, easy industrial continuous production, and significant economy. benefit effect

Active Publication Date: 2017-04-05
CHENZHOU CITY JINGUI SILVER IND CO LTD
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Problems solved by technology

This process has certain limitations on raw materials, and is suitable for processing conventional lead matte, that is, copper matte with high iron (Fe>5%) and low arsenic (As<3%). However, if this method is used for high arsenic copper materials, the Most of the copper in the raw material exists in the form of simple copper. When entering the autoclave, the copper reacts with sulfuric acid to release hydrogen gas. With the accumulation of hydrogen gas, it is prone to explosion under high temperature and high pressure.
In addition, the arsenic content of this material is too high, resulting in most of the arsenic not being solidified and entering the solution during the leaching process, which will not only greatly reduce the electrolysis efficiency of swirl electrolysis, but also affect the quality of cathode copper products

Method used

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  • Technology for treating high-arsenic copper material

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Effect test

Embodiment 1

[0026] 500 g of high-arsenic copper material (Pb10.61%; Cu 49.66%; As15.85%; S 1.34%; Ag 0.7623%; Fe 0.43%) was crushed and ground to a particle size of -120 mesh and mixed with sodium hydroxide in proportion Slurry is carried out, and then poured into an autoclave. During the leaching process, oxygen-enriched water is continuously introduced and the technical conditions are controlled: the concentration of sodium hydroxide is 180g / L, the volume-to-mass ratio of liquid to solid is 4:1 mL / g, the temperature is 90°C, the adjustment and Maintain pressure at 1.0 MPa, stirring speed at 600 r / min, and reaction time at 2.5 hours. After the oxidation leaching is completed, discharge the ore slurry out of the autoclave for liquid-solid separation, and leaching the leaching residue with sulfuric acid at atmospheric pressure. Control technical conditions: sulfuric acid concentration 150g / L , a liquid-solid ratio of 6:1, a temperature of 55°C, a stirring speed of 500 r / min, and a reaction ...

Embodiment 2

[0028] 500 g of high-arsenic copper material (Pb9.35%; Cu 52.08%; As17.73%; S 0.86%; Ag 0.5722%; Fe 0.82%) was crushed and ground to a particle size of -120 mesh and mixed with sodium hydroxide solution according to Slurry is adjusted according to the ratio, and then poured into the autoclave. During the leaching process, oxygen-enriched water is continuously introduced and the technical conditions are controlled: the concentration of sodium hydroxide is 200g / L, the ratio of liquid to solid is 4:1 mL / g, the temperature is 95°C, adjustment and maintenance The pressure is 0.8 MPa, the stirring speed is 600 r / min, and the reaction time is 3 hours. After the oxidation leaching is completed, the ore slurry is discharged out of the autoclave for liquid-solid separation, and the leaching residue is subjected to sulfuric acid atmospheric pressure leaching. The control technical conditions: sulfuric acid concentration 120 g / L, The liquid-solid ratio was 8:1, the temperature was 50°C, th...

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Abstract

The invention discloses a technology for treating a high-arsenic copper material. The technology comprises the steps that the high-arsenic copper material is subjected to crushing, grinding, sodium hydroxide mixing and oxidizing leaching, copper in the high-arsenic copper material is oxidized and left in residues in a residual mode along with lead and noble metal of gold, silver and platinum, arsenic enters a solution in a sodium arsenate mode, leachate is subjected to concentration and crystallization, a sodium arsenate product is obtained, and a concentrated solution returns to be subject to oxygen-pressure alkali leaching; leached residues are subjected to sulfuric-acid atmospheric pressure leaching, copper enters the solution in a copper sulfate mode, acid adjustment is conducted, and vortex electrolysis is directly conducted for extracting copper; electrodeposited waste liquid is recycled; and lead and the noble metal enter lead and silver residues, and valuable elements of Pb, Ag and Au are comprehensively recycled. The technology belongs to a clean metallurgy process, is low in equipment corrosion-resistant requirement, free of pollution to environment, easy to operate and high in comprehensive recycling degree of metal and has the advantages of being higher in practicability and adaptability to raw materials and the like.

Description

technical field [0001] The invention relates to a process for treating high-arsenic copper materials, which belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] A kind of lead dross is produced in the crude lead pyro-refining process of lead smelting, which enriches the copper in the raw material, so the slag is also called copper dross. In addition to copper, lead dross also includes lead, gold, silver, arsenic and antimony metals. The traditional method is to use scum reverberatory furnace smelting to process these slag materials and recover the valuable metals therein. As the composition of lead dross changes, the products obtained during reverberatory furnace smelting are also different. When the arsenic content in the lead dross is high, reverberatory furnace smelting will produce a product of arsenic matte, which contains as much as 40-60% copper and 10-25% arsenic, and most of them It exists in the form of simple substance, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C25C1/12C22B7/00
CPCC22B7/006C22B15/0065C25C1/12Y02P10/20
Inventor 蒋朝金杨跃新覃小龙蒋兆慧
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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