Narrow Results

Summarized present from indium ore resource distribution and current situation of the industry. Study on the hard zinc preparation of indium, the process including vacuum refining and vacuum distillation. Thermodynamic analysis that the boiling point of Cd, Zn, Pb lower than the Indium, In the distillation process into the gas phase; Boiling point Sn, Cu, Al, Fe than Indium lower, the residual in the liquid phase. Vacuum refining hard zinc preparation of indium slag, Indium recovery rate is 81.2%. From the sponge indium extracting crude indium rate was 97.9%.

The formula for Jamesonite is Pb₄FeSb₆S₁₄ which can be written as 4PbS·FeS·3Sb₂S₃. This paper proposed a novel technology which extracted PbS and Sb₂S₃ from Jamesonite separately by vacuum distillation. The investigation was carried out in our laboratory at the temperature 1273K~1673K and the pressure less than 50 Pa. The saturated vapor pressure of PbS, Sb₂S₃ and FeS were calculated in this paper. The contents of Sb, Pb and Fe in the volatiles and residues were detected by chemical titration analysis and the enrichment ratios of Sb, Pb and Fe were calculated. We discussed the influence of the distillation temperature and holding time on the enrichment ratios of each element. The results of the XRD indicated that FeS left in the residues as the major compound, Sb existed in the form of Sb₂S₃ and Pb existed in the form of PbS in different graphite condensers.