Method for separating crude tin and refined indium from indium-tin alloy

• Main Authors: LIU HONGFEI, LI JI, HONG MYUNG-HO, WANG BO, ZHOU PENGBO
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2024
• Subjects: ALLOYS; 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 relates to the field of separation and recovery of rare metal alloys, and provides a method for separating crude tin and refined indium from an indium-tin alloy, and indium with the purity of 4N is purified from the indium-tin alloy through three times of distillation at different temperatures. Compared with a chemical combination treatment method, the method has the advantages that the problem of pollution in the purification process is avoided, and compared with an electrolytic refining method, the purification amount is larger, and the process is shorter; meanwhile, the temperature of multiple times of vacuum distillation is reasonably designed, and the recovery rate of indium is further increased. 本发明涉及稀有金属合金分离回收领域，提供了一种从铟锡合金中分离粗锡和精铟的方法，通过三次不同温度下的蒸馏从铟锡合金中提纯出纯度为4N的铟。本方法通过相较于化合处理法，避免提纯过程产生污染的问题，相较于电解精炼法，提纯量更大，流程更短；同时，合理地设计多次真空蒸馏的温度，进一步提高了铟的回收率。