Kawasaki Steel’s steelmaking technologies for mass production of high quality slabs^*

Technologies utilisées aux aciéries de Kawasaki Steel pour la fabrication de brames de haute qualité

Abstract

Kawasaki Steel’s two integrated steel works, Chiba and Mizushima, produce high quality slabs while keeping high productivity. The steelmaking technologies which provide the high quality and competitive slabs are :

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  hot metal pretreatment for obtaining the cost- minimum phosphorus content in the melt charged to BOFs ;

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  optimized operation to produce clean steel ;

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  continuous casting technology for eliminating the origin of surface defects of sheet products, e.g. molten steel flow control in the casting mould and direct rolling without any scarfing.