Comprehensive extraction of valent metal from bismuth-containing polymetallic material

A valuable metal, comprehensive extraction technology, applied in the direction of photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems of low product added value, unsatisfactory separation, difficult to handle, etc., to achieve high product added value, High metal recovery rate and good economic indicators

Inactive Publication Date: 2007-09-05
HUNAN JINWANG BISMUTH
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Problems solved by technology

The bismuth slag, tellurium slag, and copper slag produced by this process are not easy to handle, the separation is not ideal, and the added value of the product is low

Method used

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  • Comprehensive extraction of valent metal from bismuth-containing polymetallic material

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Embodiment Construction

[0024] Hereinafter, the present invention will be described with specific embodiments in conjunction with the drawings.

[0025] The bismuth-containing material used in this embodiment has the following composition:

[0026] Pb38% Cu12% Bi18% Fe1.2% Ag3.5% Te15% Other 12.8%;

[0027] The material is smelter waste residue, which is lumpy and has metallic luster after crushing. The higher value of the material is silver and tellurium, and the others can be recovered from by-products.

[0028] The process steps for comprehensively extracting valuable metals from the above-mentioned bismuth-containing materials are shown in Figure 1;

[0029] a. Crushing: large pieces of material are crushed by the crusher until the particle diameter is less than 2cm;

[0030] b. Grinding: The crushed materials are pulverized by Raymond pulverizer, controlling 80% of the material particle size to below -120 mesh; the grinding process is a mechanical activation process, which can effectively improve th...

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Abstract

A method for extracting metal from bismuth-contained multi-metal material is carried out by leaching out copper and tellurium from bismuth-contained multi-metal by sulfuric acid, adding into chlorinating agent and oxidant to leach out metal bismuth, extracting silver from leaching-out slag with AgCl, PbSO4 and PbC12, adding ammonia water into leaching-out liquid, adjusting pH value to 1.5 to obtain bismuth oxychloride slag with 70% bismuth content, smelting into coarse bismuth by firing method or machining to obtain high-purity bismuth sesquioxide, adjusting pH value to 4.5 by Na2CO3, depositing tellurium to obtain tellurium dioxide and copper-contained solution, and electrically depositing to obtain copper powder with copper-contained content90%. It adopts wetting and firing metallurgical technology, has higher metal recovery rate and excellent leaching-out separation effect and effluent circulating utilization and no environmental pollution.

Description

Technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and particularly relates to a process for comprehensively extracting valuable metals from bismuth-containing polymetallic materials by combining hydrometallurgy, pyrometallurgy and electrochemical metallurgy. Background technique [0002] The prior art produces wet-process slag, pyro-process slag, smoke and other bismuth-containing polymetallic materials in the process of processing lead anode slime to recover gold and silver. The main component content is: Pb 35-40%; Cu 10- 15%; Bi 15-20%; Fe 1-1.5%; Ag 3-5%; Te 10-20%. For the comprehensive recovery and treatment of such complex bismuth-containing multimetal materials, most manufacturers currently use the traditional converter mixed smelting-fire refining process. The tellurium slag enriches tellurium when the fire method is used to extract silver in the converter. Produce bismuth slag, copper slag and lead slag. The direct yield of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/08C22B3/14C22B3/46C25C1/12
CPCY02P10/20
Inventor 王志雄吴祖祥戴艳平
Owner HUNAN JINWANG BISMUTH
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