About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
External Field-Intensified Materials Processing
|
| Presentation Title |
Efficient Separation of Tungsten and Cobalt from Scrap WC-8Co Cemented Carbides by Microwave Roasting and Alkaline Leaching |
| Author(s) |
Tong Zhang, Zhiwei Peng, Hao Jiang, Zexi Gong, Xin Li, Anan Duan |
| On-Site Speaker (Planned) |
Zhiwei Peng |
| Abstract Scope |
With the gradual increase in scrap cemented carbide, efficient recycling is crucial for alleviating the pressure of tungsten resource shortage. The scrap WC-8Co cemented carbide was oxidatively roasted at 700 °C for different time conditions, followed by NaOH treatment of the oxidation products with varying concentrations to investigate their leaching behavior. The effects on the phase composition and microstructure of the scrap WC-8Co-cemented carbide were investigated through experimental characterizations using chemical titration, X-ray diffraction (XRD), and scanning electron microscopy (SEM). It was shown that with increasing oxidation time, the contents of WO3 and CoWO4 gradually increased. When the oxidation time was 60 minutes, the oxidation efficiency reached 99.15. Under the condition of 2 mol/L NaOH solution and a leaching time of 90 min, the highest leaching efficiency was achieved, reaching 99.088%. The findings can be used for developing efficient approaches for utilization of scrap cemented carbide and other related industrial waste. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Pyrometallurgy, Hydrometallurgy |