SEDL / STP / STP472-EB / STP41941S

Present Status and Technical Advances of Steelworks Lime for Basic Oxygen Furnaces in Germany

Obst, Karl-Heinz
Kalk/Dolomit für die Stahlindustrie, Kalksteinwerke GmbH u. Dolomitwerke GmbH, Wilhelmstr., Wülfrath

Stradtmann, Jürgen
Kalk/Dolomit für die Stahlindustrie, Kalksteinwerke GmbH u. Dolomitwerke GmbH, Wilhelmstr., Wülfrath

Ullrich, Wolfgang
Stahlwerksmetallurgie, August Thyssen-Hütte AG, Postfach, Duisburg

König, Gert
Feuerfeststoffe und Mineralogie, August Thyssen-Hütte AG, Postfach, Duisburg

Pages: 20    Published: Jan 1970

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Abstract

The effect of chemical analysis, grain composition, and reactivity of lime on slag formation and metallurgy of steelmaking is discussed. Test showed that reburning of soft burn lime may occur in the BOF. By using special lime, which is manufactured from lime and fluxes, it is possible to work against reburning and C²S-formation. The acceleration of lime dissolution and the resulting improvement of the metallurgical reactions lead to a reduction of the blowing time.