| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
Theoretical study of tellurium recovery from crude silver under vacuum |
| Author(s) |
YIchao Yang, Guozheng Zha, Wenlong Jiang |
| On-Site Speaker (Planned) |
YIchao Yang |
| Abstract Scope |
Tellurium is widely used in semiconductor materials,infrared detection, etc.More than 90% of the global tellurium comes from the anode sludge produced by copper electrolytic refining, and about 30% of the tellurium in the anode sludge exists in the crude silver alloy after fire refining. There are two methods for refining crude silver: oxidative refining and electrolytic refining. Oxidative refining has a long cycle time, and it is difficult to recover the tellurium slag with a large loss of silver. It is difficult to separate silver and tellurium by electrolytic refining. In this study, the saturated vapor pressure, binary phase diagram, three-phase equilibrium diagram, and gas-liquid equilibrium phase diagram of silver and tellurium under vacuum were calculated theoretically, and the feasibility of vacuum separation was analyzed thermodynamically. Finally, the experimental verification was carried out in the vacuum distillation-gradient condensation experiment, the direct recovery of tellurium at 1573K and 10Pa was 97.93%. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Sustainability, Other |