Process for selective efficient copper extraction and comprehensive recovery from lead copper matte

A lead matte and selective technology, applied in the field of selective and efficient copper extraction and comprehensive recovery process, can solve the problems of unqualified copper product quality, low comprehensive recovery degree, low electrodeposition efficiency, etc., and achieve improved leaching rate and comprehensive recovery High degree of effect with low operating cost

Active Publication Date: 2015-07-22
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can realize the selective leaching of metals, because the process conditions require a liquid-solid ratio of 10:1 to achieve the desired effect, it brings a lot of inconvenience to actual production. Because the liquid-solid ratio is too large, the copper content in the leaching solution ...

Method used

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  • Process for selective efficient copper extraction and comprehensive recovery from lead copper matte

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 500 g of lead matte (Pb 16.58%; Cu 32.94%; S 15.88%; Ag 0.2684%; Fe 21.53%) is crushed, ground to a particle size of less than 100 mesh, mixed with dilute sulfuric acid, and then poured into an autoclave During the leaching process, pure oxygen was continuously fed and the technical conditions were controlled: sulfuric acid concentration 220 g / L, liquid-solid ratio 4:1, temperature 145 °C, pressure adjustment and maintenance 1.6 MPa, stirring speed 600 r / min, reaction time 2 h , after the oxidation leaching is completed, the pulp is discharged out of the autoclave for liquid-solid separation, and Cu is represented by Cu 2+ After entering the leaching solution, the leaching rate of copper is as high as 98.43% through laboratory analysis, and the leaching slag tempering lead smelting system recovers valuable elements such as Au, Ag, and Pb. The copper-containing leaching solution is directly subjected to swirl electrolysis to obtain a cathode copper product with a purity ...

Embodiment 2

[0027] 500 g of lead matte (Pb 15.42%; Cu 38.55%; S 17.20%; Ag 0.2315%; Fe 22.47%) is crushed, ground to a particle size of less than 200 mesh, mixed with dilute sulfuric acid, and then poured into an autoclave During the leaching process, pure oxygen was continuously fed and the technical conditions were controlled: sulfuric acid concentration 185 g / L, liquid-solid ratio 6:1, temperature 155 °C, pressure adjustment and maintenance 1.8 MPa, stirring speed 600 r / min, reaction time 2.5 h , after the oxidation leaching is completed, the pulp is discharged out of the autoclave for liquid-solid separation, and Cu is represented by Cu 2+ After entering the leaching solution, the leaching rate of copper is as high as 99.54% through laboratory analysis, and the leaching slag tempering lead smelting system recovers valuable elements such as Au, Ag, and Pb. The copper-containing leaching solution is directly subjected to swirling electrolysis to obtain a cathode copper product with a pu...

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Abstract

The invention discloses a process for selective efficient copper extraction and comprehensive recovery from lead copper matte and belongs to the field of wet processes of non-ferrous metal metallurgy. According to the process disclosed by the invention, the lead copper matte is taken as a raw material, and the process comprises the following steps: crushing, grinding and screening the lead copper matte, performing pulp conditioning on the lead copper matte after screening and sulfuric acid (or a waste electrolyte), then pouring into a high-pressure kettle, performing leaching, adding an adjusting agent A and introducing pure oxygen; controlling technical conditions, oxidizing sulfur in the lead copper matte to elemental sulfur in the oxidization and leaching processes, and transferring into slag; oxidizing copper to enable the copper to enter a solution in the form of copper ions and enabling lead to leave in the slag in the form of lead sulfate with gold and silver; and enabling most of iron to enter into the slag in the forms of hematite and yellow calcium iron vitriol under high-temperature, high-pressure and high-acid conditions. After the completion of the leaching process, liquid-solid separation is performed to realize primary separation of the copper and other valuable elements; after acid adjustment of a leachate, cyclone electrolysis is directly performed to extract the copper in the leachate, and then a cathode copper product which is in line with a national standard can be obtained; and leaching residues are sent into a lead pyrometallurgy system for comprehensively recovering Pb, Ag, Au and other valuable elements.

Description

technical field [0001] The invention relates to a comprehensive recovery process for selectively and efficiently extracting copper from lead matte, which belongs to the field of nonferrous metal hydrometallurgy. Background technique [0002] Lead matte is PbS, Cu 2 The eutectic of sulfides such as S and FeS, which still contains metal sulfides such as ZnS and a small amount of AgS, and also melts part of the metal Ag, Au, Pt and other precious metals. Lead matte is mainly produced in the process of pyrometallurgy. Lead smelting bottom-blown furnace, side-blown furnace, blast furnace and lead scum reverberatory furnace all produce lead matte by-product. Due to the difference in raw material composition and operating system, the composition of lead matte produced in each process of lead smelting fluctuates widely, and the lead content and copper content fluctuate between 10-20% and 20-50% respectively. If it is directly sold as copper raw material For copper smelting enterpr...

Claims

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Application Information

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IPC IPC(8): C22B7/00C25C1/12
CPCY02P10/20
Inventor 蒋朝金谢兆凤杨跃新李环李家元刘文奇邓斌周祟松刘金铭
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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