A Thermodynamic Analysis of Enriching Indium and Other Valuable Metals from Pyrometallurgical Slag via Reduction-volatilization

The pyrometallurgical process of indium and other valuable metals enrichment from lead and antimony smelting slag by reduction-volatilization in rotary kiln is thermodynamically analyzed according to the slag characteristics.The technology feasibility is indicated by the lowest temperature of reducing compounds in slag and relationship of temperature and vapor pressure derived from the thermodynamic calculation,and the results will offer instruction for practical production.