Method for recovering indium from indium-contained sulfuric acid solution and copper ash

Abstract

The invention provides a method for recovering indium from an indium-contained sulfuric acid solution and copper ash. The method comprises: A, leaching: adding the copper ash into the indium-contained sulfuric acid solution for leaching, then adding water, continuing to leach, and separating to obtain leached slag and a leachate; B, purifying: adding iron power into the leachate obtained in the step A, reducing valuable metal ions in the leachate into metal, enriching the metal into the slag, and then separating to obtain a purifying solution; C, extracting: conducting conventional extraction on the purifying solution obtained in the step B to extract indium, and then conducting replacement, briquetting and casting to obtain crude indium. The method provided by the invention directly adopts the indium-contained sulfuric acid solution to leach the copper ash, fully utilizes sulfuric acid and chlorine in the indium-contained sulfuric acid solution, and has the advantages of simple process, high indium recovery rate, low product cost, enrichment of valuable metals of copper, bismuth, tin and the like.

Description

Technical field [0001] The invention relates to a method for smelting non-ferrous metals, in particular to a method for recovering indium from indium-containing chlorosulfuric acid solution and copper soot in a hydrometallurgical zinc smelting process. Background technique [0002] Indium has the characteristics of light permeability and strong conductivity. It is mainly used to produce ITO targets (ITO targets are used to produce liquid crystal displays and flat screens), accounting for 70% of global indium consumption; the remaining 30% of global indium consumption is used In the fields of electronic semiconductors, solders and alloys. Large amounts of indium-containing materials are produced in the hydro-zinc smelting process. As indium resources become increasingly scarce, 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 indium-containing mate...

AI Technical Summary

Problems solved by technology

Although copper soot has been leached in two stages, the leaching rate of indium is still not higher than 60%, resulting in a low recovery rate of indium. At the same time, other valuable metals such as copper in copper soot are dispersed and cannot be effectively recovered.

[0005] Therefore, in the prior art, the recovery of indium in the above two indium-containing materials is carried out separately, and the methods for recovering indium from the indium-containing chlorosulfuric acid solution and copper soot all have complex production processes, high production costs, harm to the human body, There are many problems such as the low recovery rate of indium and the dispersion of valuable metal copper. How to efficiently recover indium from the above raw materials and enrich the valuable metal copper is a difficult problem to be further explored.

Images