Kawasaki Steel Corporation

Kawasaki Steel Corporaton

Kawasaki Limited

Mototatsu Sugizawa

Naoki Kikuchi

Shuji Takeuchi

Shigeru Ogura

Masayuki Onishi

Saburo Moriwaki

Hiroshi Nomura

Hiromitsu Yamanaka

Kazuya Asano

Takayuki Kaji

Yuki Nabeshima

Kazuo Arai

Shuji Tanaka

Akiharu Takao

Masaki Takashi

Michio Ibaraki

Desulfurization is carried out by blowing CaO into molten iron, and a gas mixture of an inert gas and a hydrocarbon gas is used as a carrier. The ratio of the hydrocarbon gas to the desulfurizing agent is maintained in the range of from about 2.0 to about 50 Nl/kg. This desulfurizing method improves the desulfurization efficiency of the desulfurizing agent, increases the productivity of the desulfurizing process, and reduces the amount of slag generated in the desulfurizing process. Alternatively, a desulfurizing flux is blown into the molten iron together with a carrier gas comprising a gas mixture of an inert gas and a hydrocarbon gas or an inert gas alone at the start of desulfurization. The hydrocarbon gas in the carrier gas is increased, is added, or the unit gas is replaced by the hydrocarbon gas at adequate timing, whereby the desulfurization efficiency is improved.

Method of desulfurizing molten iron

A process for desulfurizing a molten iron alloy in which a desulfurizing agent is applied to the molten iron alloy under agitation. Concurrently, a gas containing a hydrocarbon gas is blown onto the bath surface of the molten iron alloy, or a substance generating a hydrocarbon gas is added to the bath surface.

Method of desulfurizing molten iron alloy

Molten metal level control method and device for continuous casting

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Chiba, Japan

Mototatsu Sugizawa