Jfe Steel Corporation

Yuta Hino

Yukio Takahashi

Naoki Kikuchi

Yuji Miki

Shota Amano

Nobuhiko Oda

Goro Okuyama

Kenji Nakase

In a method for oxygen-blowing refining of molten iron, an oxygen-containing gas as a main supply gas is supplied from an inlet side of a blowing nozzle for the oxygen-containing gas passing through an outer shell of the top-blowing lance and blown from the blowing nozzle while a control gas is jetted toward inside of the blowing nozzle for at least part of a period of the oxygen-blowing refining from a spout arranged in a side face of the nozzle at a site where the cross-sectional area of the nozzle minimum takes the minimum in the axial direction of the nozzle or a neighborhood thereof so that at least part of the spout exists in each space formed by dividing into two portions by an arbitrary plane passing through a central axis of the nozzle.

Method for oxygen-blowing refining of molten iron and top-blowing lance

Growing community of inventors

Tokyo, Japan

Yuta Hino