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Method for preparing sponge indium from polymetallic sulfide material

A technology of polymetallic sulfide and sponge indium, which is applied in the direction of improving process efficiency, etc., to achieve the effects of low processing cost, high indium yield, and mature equipment

Inactive Publication Date: 2016-08-24
KUNMING METALLURGY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In summary, the method of preparing indium powder by leaching with nitric acid oxidant—neutralization and hydrolysis—resolvation of hydrolyzate—displacement has not been reported yet.

Method used

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  • Method for preparing sponge indium from polymetallic sulfide material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see attached figure 1 , Condition: The raw material composition of polymetallic sulfide is: iron 16.48%, copper 21.01%, lead 23.48%, zinc 3.56%, sulfur 12.48%, antimony 1.22%, bismuth 2.80%, cadmium 0.80%, indium 0.25%, silver 0.04% , all exist in the form of sulfides, weigh 3000 grams of polymetallic sulfide raw materials, the amount of nitric acid added is 3 times the weight ratio of the polymetallic sulfide raw materials, slowly heat to 85 ° C, the stirring speed is 250 rpm, the leaching time is 4h, and the leaching is over. Then, filter and wash to obtain leaching solution and leaching residue respectively. Add caustic soda to the leaching solution and stir to neutralize residual nitric acid, control pH to 3.0, filter and wash to obtain indium iron hydroxide precipitation and filtrate containing lead, copper and zinc, respectively. ; Indium-iron hydroxide mixed precipitation was added with dilute sulfuric acid to adjust the pH to 0.5, the precipitation was re-dissol...

Embodiment 2

[0031] see attached figure 1 , Condition: The raw material composition of polymetallic sulfide is: iron 16.48%, copper 21.01%, lead 23.48%, zinc 3.56%, sulfur 12.48%, antimony 1.22%, bismuth 2.80%, cadmium 0.80%, indium 0.25%, silver 0.04% , all exist in the form of sulfides, take by weighing 3000 grams of polymetallic sulfide raw materials, the oxidant is hydrochloric acid+sodium hypochlorite, and its addition is 5 times the weight ratio of polymetallic sulfide raw materials, slowly heated to 85 ℃, stirring speed is 250rpm, The leaching time is 6h. After the leaching is completed, filtration and washing are performed to obtain the leaching solution and leaching residue, respectively. The leaching solution is added with caustic soda and stirred to neutralize the residual hydrochloric acid, and the pH is controlled to 3.5. , copper, zinc and other filtrates; indium-iron hydroxide mixed precipitation was added to dilute hydrochloric acid to adjust pH 1.0, the precipitation was r...

Embodiment 3

[0033] see attached figure 1 , Condition: The raw material composition of polymetallic sulfide is: iron 16.48%, copper 21.01%, lead 23.48%, zinc 3.56%, sulfur 12.48%, antimony 1.22%, bismuth 2.80%, cadmium 0.80%, indium 0.25%, silver 0.04% , all exist in the form of sulfides, weigh 3000 grams of polymetallic sulfide raw materials, the oxidant is sulfuric acid + ammonium persulfate, and the amount added is 4 times the weight ratio of the polymetallic sulfide raw materials, slowly heated to 85 ° C, and the stirring speed is 250rpm, leaching time 5h, after leaching, filter and wash to obtain leaching solution and leaching residue, respectively, add caustic soda to the leaching solution to neutralize residual hydrochloric acid, control pH to 3.0, filter and wash to obtain indium iron hydroxide precipitation and Filtrate containing lead, copper, zinc, etc.; indium-iron hydroxide mixed precipitation, adding dilute hydrochloric acid to adjust pH 1.0, re-dissolving the precipitation a...

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Abstract

The invention discloses a method for preparing sponge indium from a polymetallic sulfide material. The method comprises the steps that the polymetallic sulfide material is mixed with an oxidizer and water, poured into a sealed titanium reaction kettle to be leached and filtered and washed, so that leaching liquid and leaching residue are obtained; the leaching liquid mainly comprises lead, copper, indium, iron, cadmium, silver and the like, and the leaching residue is used for extraction of nonferrous metal elements such as antimony and bismuth; the leaching liquid is added with a neutralizer and filtered and washed, so that a hydroxide mixed precipitation containing the indium and the iron and filtrate containing the copper, the lead, zinc, the silver and other elements are obtained; the hydroxide mixed precipitation containing the indium and the iron is added with dilute acid to be adjusted and is subjected to re-dissolution; and the re-dissolution solution is added with a displacer to enable ferric ions to be reduced to ferrous iron and trivalent indium ion reduction indium powder, after filtering and washing are conducted, filtrate containing ferrous ions and the like and sponge indium powder are obtained, and the sponge indium powder is obtained after drying is conducted. The method for preparing the sponge indium from the polymetallic sulfide material has the advantages of being simple in process, low in processing cost, high in indium yield, easy to industrialize and the like and can efficiently process the polymetallic sulfide material containing the indium.

Description

technical field [0001] The invention belongs to the field of rare and precious metal metallurgy and material preparation, and relates to a method for preparing sponge indium from polymetallic sulfide raw materials. Background technique [0002] Extracting indium from raw materials containing indium, lead, copper, iron, antimony, bismuth, silver, sulfur and other polymetallic sulfides is one of the most difficult indium-containing raw materials to handle. It exists in the form of sulfide. To extract indium, other metals need to be separated. The current method for extracting indium and rhenium from polymetallic sulfides is as follows: [0003] He Xingmin et al. disclosed a method for directly leaching zinc from zinc sulfide concentrate and recovering gallium, germanium and indium (invention patent application number: 201210112399.3). In this method, the zinc sulfide concentrate is first ground and then directly leached with low temperature, low pressure and low acid. Then, t...

Claims

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Application Information

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IPC IPC(8): C22B58/00C22B3/46C22B3/06
CPCY02P10/20
Inventor 范兴祥余宇楠黄卉
Owner KUNMING METALLURGY COLLEGE
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