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A process engineering approach to remedy an environmental problem of fugitive lead emissions during lead refining

Published online by Cambridge University Press:  03 March 2011

Liming Wang  and
Arthur E. Morris
Liming Wang*
Affiliation:
Department of Metallurgical Engineering, Center for Pyrometallurgy, University of Missouri—Rolla, Rolla, Missouri 65401
Arthur E. Morris
Affiliation:
Department of Metallurgical Engineering, Center for Pyrometallurgy, University of Missouri—Rolla, Rolla, Missouri 65401
*
a)Present address: Bricmont Engineering, 395 Valley Brook Road, McMurray, Pennsylvania 15317.
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Abstract

The refining of lead blast furnace bullion involves the transfer and handling of hot impure lead bullion. Fugitive emissions of lead-containing fumes create a plant hygiene problem. The cause of the emissions is the high vapor pressure of lead and its compounds when lead blast furnace bullion is transferred in an open ladle at ∼1000 °C from the blast furnace and poured into the drossing kettle, and later during the manual skimming of powdery dross. A laboratory study was conducted on a new concept for lead refining that eliminates contact between hot lead and the cnvironment, and thus abates fugitive lead emissions. The new process takes place in two steps: controlled solidification of bullion as it flows from the blast furnace, followed by remelting in a closed centrifuge to separate lead and dross. Refined lead was produced with <0.05% copper and <0.01% of all other impurities. Suggestions are outlined for implementing the process.

Type
Environmentally Benign Materials and Processes
Information
Journal of Materials Research , Volume 10 , Issue 3 , March 1995 , pp. 538 - 544
Copyright
Copyright © Materials Research Society 1995

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References

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