Nippon Kokan Kabushiki Kaisha

Tsutomu Usui

Yoshimi Komatsu

Masayuki Hanmyo

Tsuneo Kondo

Yoshiharu Miyawaki

Yusuke Shiratani

Yasuhiro Matsuda

A process for desulfurizing molten steel comprising the steps of: removing converter slag from molten steel; adding a desulfurizing flux onto the molten steel from which the converter slag has been removed; supplying power to electrodes at a predetermined distance from the molten steel so as to generate an electric arc, the desulfurizing flux being melted by arc-heating so as to form the slag; and introducing a gas into the molten steel through a lance submerged into the molten steel to stir the molten steel and the slag which are arc-heated. In the process the desulfurizing flux is melted to a slag consisting essentially of 53 to 62% of CaO, 0 to 15% of SiO.sub.2, and 30 to 45% of Al.sub.2 O.sub.3.

Growing community of inventors

Fukuyama, Japan

Tsutomu Usui