Steelworks residues and the Waelz kiln treatment of electric arc furnace dust
Journal Article
·
· Iron and Steel Engineer
OSTI ID:218572
- Lurgi Metallurgie GmbH, Frankfurt (Germany)
- Lurgi Corp., Charlotte, NC (United States)
Electric arc furnace dust with a combined zinc and lead content in excess of 20% renders the dumping of this material impossible in many countries, for both statutory and financial reasons. In the Waelz process, dust is treated in a rotary kiln where it is heated to approximately 1,200 C. lead and zinc are volatilized under reducing conditions and collected as fine dust in the off-gas dust collection system. The oxide recovered in the off-gas filters contains approximately 55% Zn and up to 10% Pb, and is ideal feedstock for the Imperial Smelting furnace for lead/zinc recovery. The remaining slag is inert and unleachable so that it can be used as a building aggregate.
- OSTI ID:
- 218572
- Journal Information:
- Iron and Steel Engineer, Journal Name: Iron and Steel Engineer Journal Issue: 4 Vol. 73; ISSN IRSEA5; ISSN 0021-1559
- Country of Publication:
- United States
- Language:
- English
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