ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Optimization of Desulphurization Process using Lance Injection in Molten Iron
Wenjun MaHaibo LiYang CuiBin ChenGuoliang LiuJianli Ji
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2017 Volume 57 Issue 2 Pages 214-219

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Abstract

A kinetic model of the 60% Mg and 40% CaO injection desulphurization was established. The simulation results from the model were verified by sampling, and it was in accord with the sampling results. By analyzing the model, the desulfurization process of high sulfur molten iron had three stages, incubation stage, rapid desulfurization stage and slow desulfurization stage. In order to improve the dynamic conditions and the utilization rate of the desulfurization agent, for the molten iron of sulfur content ≥0.035%, a new injection desurphurization mode was developed and applied. The smaller injection rate of powder and the larger flow rate of nitrogen were used in the slow desulfurization stage. Compared with the conventional process, the consumption of the desulfurizing agent is reduced by 10–20% by using the two-stage injection method.

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© 2017 by The Iron and Steel Institute of Japan
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