About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals: Thermodynamics and Rate Phenomena
|
| Presentation Title |
Optimization of Rotary Kiln in Molybdenite Concentrate Oxidation for Molybdic Trioxide Production |
| Author(s) |
Jungho Heo, Seongsoo Han, Hyunsik Park, Joobeom Seo |
| On-Site Speaker (Planned) |
Jungho Heo |
| Abstract Scope |
This study investigates the effects of rotational speed (0-10 rpm) and temperature (550-650°C) on the oxidation roasting of molybdenite (MoS2) concentrate in a rotary kiln. Computational predictions indicated that MoO2 production is more favorable than MoO3 up to a certain stage, after which MoO3 forms by consuming MoO2. A drum rotational speed above 5 rpm significantly increased the sulfur reduction rate, reducing sulfur content to below 5% at 60 minutes. Lowering the temperature from 650°C to 550°C also decreased sulfur content. The conversion rate of MoS2 to MoxOy (MoO2 + MoO3) generally increased with drum rotational speed and reaction time. Optimal conditions (5-10 rpm and 550-600°C) achieved a high conversion rate (97-98%). Consequently, appropriate drum rotational speed and low temperature are crucial for efficient MoO3 production. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Process Technology, Powder Materials |