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Method for processing poor organic phase after solvent extraction indium extracting

A treatment method and a technology of poor organic phase, applied in the field of recovery of valuable metals, can solve the problems of increased chlorine content, high chlorine content, and short service life of indium raffinate, so as to reduce chlorine content, realize recycling, The effect of prolonging the service life

Inactive Publication Date: 2013-04-03
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problems in the prior art that the poor organic phase of indium extraction by solvent extraction contains a large amount of impurities, which leads to its short service life, and the high chlorine content leads to an increase in the chlorine content in the indium raffinate, and provides a solvent extraction Process method for extracting indium-poor organic phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]Step 1: Use the prepared mixture of 3wt% oxalic acid and 1wt% hydrofluoric acid as the regeneration agent in this embodiment. Mix and regenerate the lean organic phase and the regenerant in the regeneration mixing tank in the extraction box, wherein the volume ratio of the lean organic phase to the regenerant is 10:1, the regeneration time is 3 minutes, the temperature is 20°C, and the clarification time is 3 minutes , obtain regeneration solution and regeneration organic phase after separation, the regeneration organic phase is sent to the next process;

[0040] Step 2: Under the condition of constant stirring, add the regenerated organic phase and dechlorinating agent water obtained in step 1 to the dechlorination mixing tank in the extraction box to carry out mixed dechlorination, wherein the volume of the regenerated organic phase and dechlorinating agent water The ratio is 10:1, the dechlorination time is 3 minutes, the temperature is 20°C, and the clarification tim...

Embodiment 2

[0043] Step 1: Use the prepared mixture of 6 wt% oxalic acid and 5 wt% hydrofluoric acid as the regeneration agent in this embodiment. Mix and regenerate the lean organic phase and the regenerant in the regeneration mixing tank in the extraction box, wherein the volume ratio of the lean organic phase to the regenerant is 40:1, the regeneration time is 6 minutes, the temperature is 40°C, and the clarification time is 5 minutes , obtain regeneration solution and regeneration organic phase after separation, the regeneration organic phase is sent to the next process;

[0044] Step 2: Under the condition of constant stirring, add the regenerated organic phase and dechlorination agent obtained in step 1 to the dechlorination mixing tank in the extraction box to perform mixed dechlorination, wherein the volume ratio of the regenerated organic phase to the dechlorination agent water is The ratio is 30:1, the dechlorination time is 5 minutes, the temperature is 30°C, and the clarificat...

Embodiment 3

[0047] Step 1: Use the prepared mixture of 10 wt% oxalic acid and 10 wt% hydrofluoric acid as the regeneration agent in this embodiment. Mix and regenerate the lean organic phase and the regenerant in the regeneration mixing tank in the extraction box, wherein the volume ratio of the lean organic phase to the regenerant is 60:1, the regeneration time is 10 minutes, the temperature is 50°C, and the clarification time is 8 minutes , obtain regeneration solution and regeneration organic phase after separation, the regeneration organic phase is sent to the next process;

[0048] Step 2: Under the condition of constant stirring, add the regenerated organic phase and dechlorinating agent water obtained in step 1 to the dechlorination mixing tank in the extraction box to carry out mixed dechlorination, wherein the volume of the regenerated organic phase and dechlorinating agent water The ratio is 60:1, the dechlorination time is 10 minutes, the temperature is 50°C, and the clarificat...

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Abstract

Disclosed is a method for processing a poor organic phase after solvent extraction indium extracting. The method includes: A, poor organic phase regeneration, namely, mixing the poor organic phase after solvent extraction indium extracting with regenerant, standing for layering, and separating to obtain a regenerated organic phase, wherein the regenerant is a mixture of oxalic acid and hydrofluoric acid; B, dechlorinating, namely, mixing the regenerated organic phase with water, standing for layering, and separating to obtain a dechlorinated organic phase; and C, acid pickling, namely, mixing the dechlorinated organic phase with pickling agent sulfuric acid solution for acid pickling, standing for layering, and separating to obtain a purified organic phase. By the method, the poor organic phase is continuously purified and regenerated, so that impurities such as iron, arsenic, tin, silicon dioxide, antimony, chlorine entrained in the organic phase are eliminated, and the service life of the organic phase is prolonged. In addition, by the method, the rate of removal of chlorine in the poor organic phase is higher than 85wt%, and a condition for subsequent recovery of zinc in indium extracting residual liquid is provided.

Description

technical field [0001] The invention relates to a method for recovering valuable metals in a zinc hydrometallurgy process, in particular to an extraction treatment method for recovering indium from indium-containing materials. Background technique [0002] At present, the general process for recovering indium from indium-containing materials is: indium-containing materials → enrichment → leaching → purification → extraction → stripping → replacement → melting and casting anode → electrolysis → indium ingots, among which, the common extraction agents and The diluents are P204 (bis(2-ethylhexyl phosphoric acid)) and sulfonated kerosene. With the increasing scarcity of indium resources, impurities such as iron, arsenic, bismuth, tin, silicon, and antimony in indium-containing materials are getting higher and higher. When indium is enriched, impurities also enter the enrichment slag along with indium. When the enriched slag is leached, most of these impurities are transferred i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B58/00
CPCY02P10/20
Inventor 窦传龙林文军刘一宁廖贻鹏李维鉴戴慧敏
Owner ZHUZHOU SMELTER GRP
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