Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Influence of Powder Injection on Dephosphorization and Desulphurization of Pig Iron
Kazushige UMEZAWATakeshi TANAKAMitsuru SATOHisashi MATSUNAGA
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1986 Volume 72 Issue 1 Pages 39-46

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Abstract

The effect of CaO-CaF2-CaCl2 powder injection with oxygen gas on dephosphorization and desulphurization reactions of pig iron was investigated experimentally by using 6 ton ladle.
Both reactions are affected by injection depth, powder size, powder composition and oxygen feeding rate, so that transitory reaction is important for injection process. However, its contribution to dephosphorization reaction is approximately 25% of overall reaction and permanent reaction also plays an important role in such a medium size ladle. From these results we can recognize that effect of injection on improvement of reactions is caused not only by the effective transitory reaction but also by direct feeding of powder into metal, and strong stirring by gas injection accelarating permanent reaction.

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© The Iron and Steel Institute of Japan
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