Method for separating arsenic and recycling copper from arsenious high-copper dross

Abstract

A method for separating arsenic and recycling copper from arsenious high-copper dross comprises the following steps that (1) pretreatment, wherein the arsenious high-copper dross is screened, fine products and crude products are obtained, and the fine products are ground to be fine; (2) oxygen pressing acid leaching, wherein the fine products obtained in the step 1 are subjected to oxygen pressingacid leaching, and leachate and leaching residues are obtained; (3) oxygen pressing arsenic fixing, wherein siderite is added into the leachate obtained in the step 2 under the condition of oxygen pressure, and arsenic fixing after liquid and arsenic sedimentation residues are obtained; (4), cyclone electrodeposition, wherein the arsenic fixing after liquid is subjected to cyclone electrodeposition, electrodeposition after liquid and black copper residues are obtained, and after the black copper residues are cast through a pyrogenic process, crude copper is obtained. According to the method for separating arsenic and recycling copper from the arsenious high-copper dross, the siderite is used for arsenic removal, the acidity of a solution can be reduced, cost is low, and generation of ferric sulfate can be promoted; the solubility of iron arsenate can be reduced, the arsenic removal rate is high, no hydrogen is generated in the reaction process, and potential safety hazards caused by explosions are eliminated.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for recycling and treating arsenic-containing high-copper scum. Background technique [0002] Crude lead refining dross contains about 10% (mass percentage) of copper. At present, reverberatory furnaces are mostly used to process copper-containing dross. Reverberatory furnaces are smelted to obtain crude lead, arsenic matte, and soot. The slag needs more than 1,000 yuan, and the cost is high, and the obtained arsenic matte has a high arsenic content, and the valuation coefficient of valuable metals such as lead, copper, gold, and silver is low. degree of pollution. [0003] The invention patent application with the publication number CN 106048251 A discloses a clean and efficient process for treating arsenic matte. Oxygen pressure acid leaching is performed on arsenic matte, and elemental iron, ferric sulfate, ferrous sulfate, ferric oxide, Iron ferric oxide...

AI Technical Summary

Problems solved by technology

It has the following problems: ① During the reaction of elemental iron and sulfuric acid, hydrogen gas will be generated, which may cause an explosion risk

②The use of ferric sulfate and ferrous sulfate has the problem that the concentration of sulfuric acid in the solution cannot be reduced, and the concentration of sulfuric acid in the solution is a key factor affecting the arsenic removal rate

③ Fe2O3 and Fe3O4 react slowly with sulfuric acid under the condition of low sulfuric acid concentration, resulting in too long arsenic fixation time, low iron utilization rate and high energy consumption

④Elemental iron, ferric sulfate, ferrous sulfate, ferric oxide, ferric oxide or ferrous oxide are generally expensive, and there is a problem that the cost of using them to remove arsenic is too high

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