Method for recovering indium from waste target material

The method comprises the following steps: (1) leaching: adding a hydrochloric acid solution into an ITO target waste material, heating and stirring under ultrasonic waves, leaching for a certain time, and filtering to obtain acid soluble slag and a leaching solution; (2) electrolytic separation of tin: placing the leachate in an electrolytic bath for micro-current electrolysis, filtering and taking filtrate; (3) electrolytic separation of indium: carrying out micro-current electrolysis on the filtrate again, and taking sunk sponge indium precipitated at the bottom of the tank; and (4) briquetting and drying: briquetting, drying and casting the sunk sponge indium to obtain a finished product. According to the method, the phenomena of'coating zinc with indium 'and the like during traditional zinc powder replacement are effectively avoided, the zinc content in sponge indium is greatly reduced, then the grade of obtained indium is 99.998% and meets the industrial standard, strong current electrolysis is not neede