Steelworks residues and the Waelz kiln treatment of electric arc furnace dust

Journal Article · Mon Apr 01 00:00:00 EST 1996 · Iron and Steel Engineer

OSTI ID:218572

Strohmeier, G ^[1]; Bonestell, J E ^[2]

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1. Lurgi Metallurgie GmbH, Frankfurt (Germany)
2. 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, Vol. 73, Issue 4; Other Information: PBD: Apr 1996
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
METAL INDUSTRY
WASTE MANAGEMENT
DUSTS
WASTE PROCESSING
LEAD
EVAPORATION
MATERIALS RECOVERY
ZINC
ARC FURNACES
ZINC OXIDES
LEAD OXIDES
CHEMICAL FEEDSTOCKS