Sumitomo Metal Industries, Inc.

Yoshimichi Ohkita

Hidemasa Nakajima

Shozo Okamura

Tohru Matsuo

Seiichi Masuda

Takeyuki Hirata

Shoji Anezaki

Takeo Aoki

A process for producing an ultra-low phosphorus steel containing 0.010% or less of phosphorus is disclosed, which comprises charging a desiliconized pig iron into a top- and bottom-blowing oxygen converter, introducing a slag-forming agent in a powdered form onto the molten iron together with the top-blowing oxygen and introducing a bottom-blowing gas selected from the group consisting of an inert gas, nitrogen gas, oxygen gas, carbon monoxide gas, carbon dioxide gas and mixtures thereof during the oxygen top-blowing or during both the oxygen top-blowing and the subsequent tapping.

Production of ultra-low phosphorus steel

Growing community of inventors

Nishinomiya, Japan

Yoshimichi Ohkita