Kawasaki Steel Corporation

Kanji Emoto

Masayuki Onishi

Tetsuya Fujii

Hirosuke Yamada

Yoshiei Kato

Sumio Yamada

Fumio Sudo

Katsuhisa Hirayama

Hideshi Ohzu

Yasuo Masuda

Masakatsu Ogawa

A process for producing a steel in at least two converters using a great or substantial amount of an iron-bearing cold material. The iron-bearing cold material and a carbonaceous material are supplied into one of the converters under the presence of a molten iron or a preliminarily treated molten iron and are melted therein under oxygen-blowing to obtain a preliminarily treated molten iron containing a high content of carbon, and the preliminarily treated molten iron is refined in the other converter under oxygen-blowing to obtain a molten steel having the given composition.

Process of making steel in converter using a great amount of

Methods for controlling blowing, controlling the slag formation and predicting sloping in the blowing of molten pig iron in LD converter are carried out by measuring acceleration of the horizontal movement of a detector, such as a lance provided in the converter, which is caused only by the slag impinging against the lance, by an accelerator, integrating the measured values to obtain integrated average values at every several seconds, and programming the integrated average values in a computer.

Methods for controlling blowing, controlling the slag formation and

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Kurashiki, Japan

Kanji Emoto