Method for separating, enriching and recycling indium from low-concentration indium sulphate solution
A technology of separation and enrichment and indium sulfate, applied in the direction of improving process efficiency, etc., can solve the problems of unresolved chlorine-containing waste acid discharge, unsuitable for separation and recovery, etc., to reduce adverse effects, eliminate dispersion losses, and reduce production cost effect
Active Publication Date: 2015-11-04
KUNMING UNIV OF SCI & TECH
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Abstract
The invention relates to a method for separating, enriching and recycling indium from a low-concentration indium sulphate solution, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: firstly performing P204 extraction on the low-concentration indium sulphate solution, and then performing hydrochloric acid back extraction so as to obtain an indium chloride strip solution; performing TBP extraction on the obtained indium chloride strip solution; performing dilute sulphuric acid back extraction so as to obtain a high-concentration indium sulphate solution; and finally performing metal replacement on the high-concentration indium sulphate solution so as to obtain sponge indium. According to the method disclosed by the invention, the indium is obtained through back extraction of sulphuric acid in the end, the high-concentration indium sulphate solution is produced, the hydrochloric acid used in a middle process can be circularly used, so that the consumption of the hydrochloric acid is reduced, large-scale emission of chloride waste water can be avoided, and negative influences of chlorine ions on zinc hydrometallurgy electrodeposition operational procedures are reduced.
Application Domain
Process efficiency improvement
Technology Topic
IonHigh concentration +11
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