Method for removing thallium in indium-thallium material

• Main Authors: LIU HONGFEI, LI JI, HONG MYUNG-HO, WEN TAO, LI HUAN, YE JIANMING, WANG BO
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2024
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention belongs to the technical field of resource recycling, and discloses a method for removing thallium in an indium-thallium material, which comprises the following steps: adding the indium-thallium material into an acid solution for primary acid dissolution to obtain a mixed solution I, adding an alkaline solution into the mixed solution I to adjust the pH value to 1.0-3.0, then adding a sulfide salt solution for primary precipitation, and carrying out solid-liquid separation to obtain a first indium solution and a thallium sulfide precipitate; immersing the thallium sulfide precipitate into an acidic solution for secondary acid dissolution to obtain a mixed solution II, adding an alkaline solution into the mixed solution II to adjust the pH value to 1.0-3.5, then adding the acidic solution, a stabilizer and a sulfide salt solution, mixing, putting into a hydrothermal reaction kettle, and reacting for 2-24 hours at the temperature of 150-400 DEG C for secondary precipitation to obtain a second indi