| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Process Metallurgy and Environmental Engineering: An EPD Symposium in Honor of Takashi Nakamura
|
| Presentation Title |
Zinc Oxide Production from EAF Dust Using Electrothermic Furnace at Onahama Refinery |
| Author(s) |
Ishibashi Katsuyuki, Yamaguchi Takuya, Numata Kenji |
| On-Site Speaker (Planned) |
Ishibashi Katsuyuki |
| Abstract Scope |
In 1974, the Onahama refinery of Toho Zinc Co., Ltd. started zinc oxide production from EAF dust for the first time in Japan. We produce 12,000 tons of high-quality zinc oxide annually, which is sold to rubber manufacturers, using approximately 40,000 tons of EAF dust and crude zinc oxide. Our process consists of three stages and has been modified several times since its start-up. The first stage is the Calcination/Chlorination process, which removes impurities such as lead, cadmium, and chloride using a rotary furnace. The second stage is the sintering process, in which the calcine is agglomerated into sinter with a size of 30-50mm. The final stage is the reduction process using an Electrothermic furnace, in which the sinter is charged into the electrothermic furnace from the top, after being mixed with coke. This report describes the recent improvements in this zinc recycling process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Process Technology, Other |