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Method for comprehensively recovering copper and indium from lead matte

A technology for lead matte and copper recovery, applied in the field of non-ferrous metal hydrometallurgy, can solve the problems of low metal recovery rate, incomplete separation of copper and indium, sulfur recovery, etc., and achieves less discharge of three wastes, high recovery rate, and simple process. Effect

Active Publication Date: 2015-02-18
YUNNAN COPPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for comprehensively recovering copper and indium from lead matte, aiming at solving the shortcomings of low recovery rate of valuable metals and sulfur recovery in the existing wet process, The problem of incomplete separation of copper and indium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) The chemical composition (mass%) of lead matte includes: Cu 19.57, Pb 33.76, Zn 5.12, Fe 13.8, As 1.63, Sb 0.37, Bi 0.2, Cd 0.6, Sn 3.48, including In 2300g / t , Ag 395.49g / t, Au 0.53g / t, after crushing the lead matte block material, use a ball mill to grind it to a particle size below 300 mesh;

[0055] (2) The ball-milled lead matte powder is heated in an autoclave with H 2 SO 4 The solution is leached, and oxygen is continuously introduced during the leaching process. The technological conditions of the pressurized acid leaching process are: reaction time 3h, oxygen pressure 1.6MPa, temperature 145°C, liquid-solid ratio 4:1, sulfuric acid concentration 220g / L.

[0056] (3) After pressurized acid leaching, solid-liquid separation is carried out to obtain leaching residue and Cu-containing 2+ and In 3+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting system to recycle valuable elements such as lead, gold, and silver;

[...

Embodiment 2

[0065] (1) The chemical composition (%) of lead matte includes: Cu 11.95, Pb 43.16, Zn 4.35, Fe 14.04, As 1.23, Sb 0.51, Bi 1.05, Cd 0.73, Sn 2.08, including In 1810g / t, Ag 396.9g / t, Au 0.51g / t, after crushing the lead matte block material, use a ball mill to grind to a particle size below 300 mesh;

[0066] (2) The ball-milled lead matte powder is heated in an autoclave with H 2 SO 4 The solution is leached, and oxygen is continuously introduced during the leaching process. The technological conditions of the pressurized acid leaching process are: reaction time 3h, oxygen pressure 1.4MPa, temperature 150°C, liquid-solid ratio 4.5:1, sulfuric acid concentration 200g / L.

[0067] (3) After pressurized acid leaching, solid-liquid separation is carried out to obtain leaching residue and Cu-containing 2+ and In 3+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting system to recycle valuable elements such as lead, gold, and silver;

[0068...

Embodiment 3

[0076] (1) The chemical composition (%) of lead matte includes: Cu 13.25, Pb 23.45, Zn 6.3, Fe 15.2, As 1.42, Sb 0.45, Bi 0.85, Cd 0.52, Sn 4.02, including In 2500g / t, Ag 394.2g / t, Au 0.54g / t, after crushing the lead matte block material, use a ball mill to grind to a particle size below 300 mesh;

[0077] (2) The ball-milled lead matte powder is heated in an autoclave with H 2 SO 4 The solution is leached, and oxygen is continuously introduced during the leaching process. The process conditions of the pressurized acid leaching process are: reaction time 2h, oxygen pressure 1.2MPa, temperature 155°C, liquid-solid ratio 3.5:1, sulfuric acid concentration 240g / L.

[0078] (3) After pressurized acid leaching, solid-liquid separation is carried out to obtain leaching residue and Cu-containing 2+ and In 3+ The leaching solution and the leaching slag are returned to the pyro-method lead smelting system to recycle valuable elements such as lead, gold, and silver;

[0079] (4) St...

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Abstract

The invention discloses a method for comprehensively recovering copper and indium from lead matte. The method comprises the following steps: A, crushing lead matte block materials and then ball-milling to obtain lead matte powder; B, leaching the lead matte powder obtained by ball-milling in an autoclave by using sulfuric acid and continuously introducing oxygen in the leaching process; C, after leaching, carrying out solid-liquid separation to obtain leaching residues and leachates containing copper ions and indium ions; D, selectively extracting the copper ions in the leachates by using ZJ988, obtaining copper sulfate enrichment liquid by using a sulfuric acid-copper sulfate solution to perform reverse extraction on loaded organic phase, taking the copper sulfate enrichment liquid as an electrolyte of electro-deposit copper and obtaining cathode copper through a copper sulfate electro-deposition process; E, selectively extracting the indium ions by using P204, then obtaining indium chloride enrichment liquid by using a hydrochloric acid solution to perform reverse extraction on the loaded organic phase and replacing the indium chloride enrichment liquid by using a zinc plate or an aluminum plate to obtain sponge indium. The method has the benefits that the complete separation of the copper from the indium in the lead matte is realized, recovery rate of the valuable metal is high, and the environmental friendliness is realized.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal hydrometallurgy, in particular to a method for comprehensively recovering copper and indium from lead matte. Background technique [0002] Lead matte is a polymetallic sulfide mixture mainly composed of copper and lead sulfides produced by smelting various types of smoke and dust in the production system of smelting enterprises. Lead matte is characterized by high content of valuable metals such as copper and indium, and has a high comprehensive recovery value. Using the traditional copper or lead pyro-smelting process to process this material, the process is complicated, the production cost is high, and the environment is polluted. At the same time, the separation of copper and lead is not complete, which will lead to unsatisfactory product purity. The existing wet leaching process has low requirements on the corrosion resistance of equipment materials, short process flow, high comprehe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B58/00
CPCY02P10/20
Inventor 华宏全俞小花侯彦青史谊峰徐养良倪源舒波王晓武
Owner YUNNAN COPPER CO LTD
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