| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.24 ( April 1991 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Total Hot Metal Pretreatment System at Kawasaki Steel Masahito Suitoh, Kanji Aizawa, Masahiro Ariyosi, Ryoji Nagai, Hiroshi Nishikawa, Shigeru Omiya |
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Synopsis : In order to further improve steel quality and to ensure stable operation, Kawasaki Steel Corporation completed facilities for the total hot metal pretreatment system both at Chiba and Mizushima Works in 1988. To realize the pretreatment of the whole quantity of hot metal, KSC used a torpedo car for its reaction vessel and adopted several unique techniques, like the post-mixing method of flux, a slanted injection lance, torpedo car cleaning system, torpedo car transportation system, etc. The total hot metal pretreatment has resulted in great improvement in product quality and stable refining operation. Typical examples are the high degree of cleanliness in ultra-low carbon steel, catch-carbon techniques for high carbon steel refining, stable refining of high Cr and stainless steel, minimizing the abnormal product, achieving long life of BOF, etc. |
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