Kinetics of reduction of lead smelting slags with solid carbon

Kinaev, Nikolai N., Jak, Evgueni and Hayes, Peter C. (2005) Kinetics of reduction of lead smelting slags with solid carbon. Scandinavian Journal of Metallurgy, 34 2: 150-157. doi:10.1111/j.1600-0692.2005.00733.x


Author Kinaev, Nikolai N.
Jak, Evgueni
Hayes, Peter C.
Title Kinetics of reduction of lead smelting slags with solid carbon
Journal name Scandinavian Journal of Metallurgy   Check publisher's open access policy
ISSN 0371-0459
Publication date 2005-04-01
Sub-type Article (original research)
DOI 10.1111/j.1600-0692.2005.00733.x
Open Access Status Not yet assessed
Volume 34
Issue 2
Start page 150
End page 157
Total pages 8
Editor J. O. Edstroem
Place of publication Denmark
Publisher Blackwell Munksgaard
Language eng
Subject C1
290702 Mineral Processing
670800 Basic Metal Products (incl. Smelting)
091407 Pyrometallurgy
Abstract Research techniques and a methodology have been developed that enable the reduction kinetics of molten lead smelting slags with solid carbon to be studied. The rates of reduction of PbO-FeO-Fe2O3-CaO-SiO2 slags with carbon have been measured for a range of slag compositions for PbO concentrations between 3 and 100 weight percent, and temperatures between 1423 and 1573 K. The reduction rates were determined for both graphite and coke. Within the range of process conditions examined, it has been shown that the reaction rates are almost independent of carbon reactivity, SiO2/CaO and SiO2/Fe ratio in the range of compositions investigated and are not influenced by the presence of sulphur in the slag.The apparent first order rate constants for oxygen removal increase with increasing PbO concentration and oxygen activity in the slag. The data indicate that the rate limiting reaction step for the reduction of lead slags with solid carbon is the chemical reaction at the gas/slag interface.
Keyword Metallurgy & Metallurgical Engineering
Carbon
Kinetics
Mechanisms
Reduction
Slags
Feo
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 15:36:44 EST