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Method for recovering gallium, germanium and indium in zinc replacement slag leaching solution through extraction

A leachate and extraction technology, which is applied in the field of gallium, germanium and indium in the leachate of zinc replacement slag, can solve the problems of high metal loss rate, exhaust gas pollution, cumbersome process operation, etc., and achieve low investment cost, low production cost and simple process Effect

Inactive Publication Date: 2018-07-20
SHENZHEN ZHONGJIN LINGNAN NONFEMET COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pyroprocessing process volatilizes the valuable elements in the zinc replacement slag into the soot through high temperature, and then leaches the soot with acid. This process has the disadvantages of high energy consumption and serious exhaust gas pollution.
The wet treatment process mostly adopts the method of step-by-step extraction of a solution rich in valuable metals. After each step of extracting a valuable metal, it must be neutralized and separated. This process is cumbersome to operate, with a high metal loss rate and many extraction systems. increase production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Extract the sulfuric acid leaching solution of the zinc replacement slag to recover gallium germanium indium, the gallium (Ga) content in the zinc replacement slag leaching solution is 350 mg / L, the germanium (Ge) content is 455 mg / L, and the indium (In) content is 57 mg / L , iron (Fe) content is 5.5g / L, zinc (Zn) content is 56g / L, sulfuric acid (H 2 SO 4 ) content is 15g / L, concrete steps are as follows:

[0026] (1) Neutralization and reduction: Add the leaching solution of zinc replacement slag into the stirring tank, start stirring, then add zinc oxide until the pH value reaches 1.6, then add reduced iron powder to react for 1 hour, and detect Fe in the solution after the reaction 3+ The content of the solution is 0.8g / L, and the solution is filtered for later use.

[0027] (2) Extraction: According to the volume ratio of 20:0.2:79.8, mix P207 extraction agent, YW100 co-extraction agent and 260# solvent oil to make a mixed extraction agent, and then follow the volu...

Embodiment 2

[0034] Extract the sulfuric acid leaching solution of the zinc replacement slag to recover gallium germanium indium, the gallium (Ga) content in the zinc replacement slag leaching solution is 550 mg / L, the germanium (Ge) content is 450 mg / L, and the indium (In) content is 60 mg / L , iron (Fe) content is 10.5g / L, zinc (Zn) content is 58g / L, sulfuric acid (H 2 SO 4 ) content is 30g / L, concrete steps are as follows:

[0035] (1) Neutralization and reduction: Add the leaching solution of zinc replacement slag into the stirring tank, start stirring, then add zinc oxide until the pH value reaches 1.5, then add sodium sulfite to react for 1 hour, and detect Fe in the solution after the reaction 3+ The content of the solution is 1.0g / L, and the solution is filtered for later use.

[0036] (2) Extraction: According to the volume ratio of 18:1:81, mix P207 extraction agent, YW100 co-extraction agent and 260# solvent oil to make a mixed extraction agent, and then follow the volume ratio...

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PUM

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Abstract

The invention relates to a method for recovering gallium, germanium and indium in a zinc replacement slag leaching solution through extraction. The method comprises the following steps that (1) neutralization and reduction are carried out, wherein a neutralizer is added into the zinc replacement slag leaching solution until the pH value reaches 1.5-1.8, then a reducing agent is added for reaction, and the content of the ferric ion (Fe <3+>) in the solution after reaction is controlled to be less than 1g / L; (2) extraction is carried out, wherein an extracting agent, a co-extracting agent and adiluent are mixed for extracting the obtained solution in the step (1); (3) reverse extraction of the gallium is carried out by using sulfuric acid; (4) reverse extraction of the indium is carried out by using hydrochloric acid; (5) reverse extraction of the germanium is carried out by using a fluoride aqueous solution; and (6) acidifying and regenerating are carried out, wherein the organic phase obtained by extraction in the step (5) is subjected to acidification regeneration treatment by using the sulfuric acid, and the regenerated organic phase is returned to the step (2) for extraction.The method for recovering the gallium, the germanium and the indium in the zinc replacement slag leaching solution through extraction has the advantages of being high in extraction recovery rate, simple in process and low in cost.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for extracting and recovering gallium, germanium and indium in the leaching solution of zinc substitution slag. Background technique [0002] The zinc concentrate is leached by oxygen pressure, and the zinc and associated metals enter the leaching solution, and then add zinc powder for replacement, so that the associated valuable metals are precipitated and enriched to form a zinc replacement slag with high added value. Zinc substitution slag is generally rich in valuable metals gallium, germanium, indium, zinc, iron, etc., and also contains impurity silicon dioxide. Zinc replacement slag needs to be further acid leached to extract valuable metals, especially gallium germanium indium. [0003] At present, the methods for the comprehensive recovery of valuable metals in the zinc smelting process are mainly pyroprocessing and wet processing. The pyroprocessing pr...

Claims

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Application Information

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IPC IPC(8): C22B58/00C22B41/00C22B3/40
CPCC22B41/00C22B58/00C22B3/409Y02P10/20
Inventor 张登凯刘野平周平吴才贵张伟徐克华周科华宫晓丹胡立曾日明廖文讯
Owner SHENZHEN ZHONGJIN LINGNAN NONFEMET COMPANY
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