Method used for selective high-efficiency extraction of copper and bismuth from high-copper bismuth slag
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A selective, bismuth slag technology, applied in the direction of improving process efficiency, can solve the problems of complex process flow, high production cost, long production cycle, etc., and achieve the effect of low operating cost, convenient operation, and high degree of comprehensive recovery
Inactive Publication Date: 2017-04-19
CHENZHOU CITY JINGUI SILVER IND CO LTD
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[0006] The above-mentioned technical methods all need hydrolysis, neutralization or replacement operations, and there
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[0025] Example 1:
[0026] a. Take 500g of high-copper bismuth slag (Bi 32.49%; Cu 16.56%; Pb 30.37%; Sb 1.14%; Ag 9.32 kg / t; Au1.98g / t), crushed and ball milled to a particle size of -100 mesh, and 100 g / L sulfuric acid solution is slurried and poured into an autoclave for oxidative leaching and copper removal. Control technical conditions: liquid-solid mass ratio is 5:1 L / kg, leaching time is 2h, oxygen pressure is 0.8MPa, leaching temperature is controlled at 85 ±3℃; after leaching and filtering, the results of chemical analysis of the filter residue obtained are as follows: Bi 36.08%, Cu0.32%, Pb33.12%, Sb 1.82%, Ag9.97 kg / t, Au 2.32 g / t, residue The rate is 90.68%, and the copper leaching rate is 98.25%;
[0027] b. The volume of the leaching solution in step a is 5000 ml, containing 32.36 g / L of Cu, and the copper cyclone electrolysis is sent to extract copper; the copper cyclone electrolysis cell voltage is 2.5V, and the current density is 600A / m 2 , The electrolysis time ...
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[0030] Example 2:
[0031] a. Take 500g of high-copper bismuth slag (Bi 31.76%; Cu 15.42%; Pb 30.99%; Sb 1.18%; Ag 6.17 kg / t; Au1.71g / t), crushed and ball milled to a particle size of -100 mesh, and 100 g / L sulfuric acid solution is slurried and poured into the autoclave for oxidative leaching and copper removal. Control technical conditions: liquid-solid mass ratio is 5:1 L / kg, leaching time is 2h, oxygen pressure is 0.6MPa, leaching temperature is controlled at 80 ±3℃; after leaching and filtering, the composition of the filter residue obtained is as follows: Bi 35.84%, Cu0.45%, Pb34.01%, Sb 1.45%, Ag7.80 kg / t, Au 2.03 g / t, residue The rate is 89.73%, and the copper leaching rate is 97.74%;
[0032] b. The volume of the leachate in step a is 5000 ml, containing 30.17 g / L of Cu, and the copper cyclone electrolysis is sent to extract copper; the copper cyclone electrolysis cell voltage is 2.5V, and the current density is 600A / m 2 , The electrolysis time is 2h, the electrolytic co...
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Abstract
The invention discloses a method used for selective high-efficiency extraction of copper and bismuth from high-copper bismuth slag. According to the method, high-copper bismuth slag is taken as a raw material; high-copper bismuth slag powder obtained via smashing, grinding, and sieving and a sulfuric acid solution are subjected to size mixing at a certain ratio, and are delivered into a high-pressure autoclave; rich oxygen is introduced into the high-pressure autoclave, and oxygen pressure in the high-pressure autoclave is controlled for oxidizing leaching, wherein in the oxidizing leaching process, leaching of Cu in the form of Cu2+ is realized, and selective separation of copper with other non-zero valent elements is realized; a copper-containing leachate is subjected to acid adjusting, and is subjected to rotational flow electrolysis directly so as to extract copper in the copper-containing leachate and obtain copper products; a leaching residue is subjected to leaching separation of bismuth with concentrated hydrochloric acid, sponge bismuth is obtained via electro-deposition, and product refined bismuth is obtained via refining of sponge bismuth; and the rest slag is delivered into a lead pyrometallurgy system for comprehensive recycling of non-zero valent elements such as Pb, Ag, and Au. No environment pollution is caused by the method, no three wastes are discharged, and the method is a clean metallurgy technology.
Description
technical field [0001] The invention relates to a process for selectively and efficiently extracting copper and bismuth from high-copper-bismuth slag, belonging to the field of nonferrous metal hydrometallurgy. Background technique [0002] In the process of recovering gold and silver from lead anode slime, a kind of slag is produced in the later stage of noble lead oxidation and refining. This slag mainly contains valuable metals such as lead, bismuth, copper, antimony, gold and silver. Its comprehensive recovery value considerable. The comprehensive recovery of valuable metals in this slag is of great significance for improving production economic benefits and rationally utilizing resources. [0003] Chinese patent 200710034666.9 introduces a process for comprehensively extracting valuable metals from bismuth-containing polymetallic materials. This process first uses sulfuric acid to leach copper and tellurium from bismuth-containing polymetallic materials; Then, in the ...
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