|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Thermal Analyses of Silver-based Sulfosalts in Air
||Fiseha Tesfaye, Daniel Lindberg
|On-Site Speaker (Planned)
The roasting of sulﬁde ores and concentrates is an important process step in the production of valuable metals and chemicals. It involves gas–solid reactions to remove volatile components from the sulfide ores and concentrates. Silver-based sulfosalts are common minerals in precious and base metal sulfide ores. In this work, the sulfosalts in the Ag-(Cu,Bi)-S systems have been studied under oxidizing conditions. The sulfosalts were synthesized from the pure simple sulfides in an evacuated quartz ampoule. Then, the synthesized samples were thermally analyzed in the temperature range from 298 to 1173 K by the simultaneous a simultaneous DTA-TGA analyzer. Based on the calorimetric measurements, the maximum thermal stabilities of the phases in oxidizing conditions are determined. Different steps of the gas-solid reactions within the pyrometallurgical roasting temperature range are described, and the obtained results are compared with the estimated and literature values.
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