Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
RH Treatment by Laval Nozzle Lance with Sub-hole
Teruyoshi HIRAOKAKazuo OHNUKIHiromu FUJIIKazuhisa FUKUDAYousuke HOSHIJIMA
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2003 Volume 89 Issue 2 Pages 252-257

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Abstract

The purposes of combustion by multi function burner lance are skull-less operation of vacuum vessel, increasing the temperature of molten steel, and improving the decarburizing rate. In this paper the decarburizing rate is investigated in case of oxygen blowing and burning with excess oxygen.
Oxygen blowing can improve the decarburizing rate with the RH multi function burner lance even if carbon content in molten steel is high before RH-treatment.
Neither pollution nor the decrease in the quality was seen from the composition change of molten steel in RH treatment and the quality investigation of the product in operation with RH multi function burner lance.

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© The Iron and Steel Institute of Japan
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