Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Effect of Pore Distribution in. Lime on Desulfurization Mechanism of Hot Metal by Solid Lime
Mitsuru UEDAYasuhiko FUJITAKazuyoshi NAKAITsunetaka TOSHIMORIZen-ichiro MORITA
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1989 Volume 75 Issue 1 Pages 58-65

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Abstract

It is important to understand the desulfurization mechanism by solid CaO for improving its desulfurizing power of hot metal.
From the standpoint described above, desulfurization experiment of hot metal was carried out by CaO calcined under various conditions. Experimental results were discussed with CaO properties.
Results obtained are as follows.
No correlation between utilization factor (ηS) which has been regarded as a desulfurizing power and CaO properties was found.
On the other hand, a good correlation between desulfurization efficiency (dηS /dt) defined by the authors and pore size distribution of CaO used was found, namely higher desulfurization efficiency of early stage in the reaction was given by rather lower porosity CaO having pores with wide diameter, than by higher porosity CaO having a number of pores with small diameter.

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© The Iron and Steel Institute of Japan
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