Sumitomo Metal Industries, Inc.

Shinagawa Refractories Co., Ltd.

Kurosaki Refractories Co., Ltd.

Sumitomo Metal Industries Co., Ltd.

Nobuyoshi Hiroki

Seiichi Masuda

Takeyuki Hirata

Tsutomu Ueno

Hiroyuki Ikemiya

Kazuaki Takimoto

Ryo Michioka

Gensuke Muta

Yosisuke Nagano

Hiroyuki Danjo

Yasuo Kishimoto

A lining apparatus provided with a foldable spray pipe comprising an elevatable vertical support strut supported by a frame, a bifurcated support strut having the upper end thereof connected to the lower end of the elevatable vertical support strut, the bifurcated strut comprising a pair of parallely extending strut elements which define an arm storing space therebetween opening at both sides, a pipe supporting arm foldably connected to the lower end of the bifurcated strut and encasing a spray pipe therein and a protective path formed in each strut element of the bifurcated strut allowing a plurality of lines including a material supply line to pass therethrough.

Lining apparatus provided with a foldable spray pipe

The present invention relates to a hot-gunning method for repairing converters which comprises the step of:

Hot-gunning method for repairing converters

An oxygen top-blowing steelmaking process is disclosed, which comprises preparing a molten metal suitable for producing steel in a basic oxygen furnace, carrying out the top-blowing and bottom-blowing and then tapping the resulting molten steel. The bottom-blowing is carried out at least partly during the period of time from beginning of blowing to the tapping of the melt and a powder of a slag-forming agent, such as quick lime, limestone, is introduced into the molten metal together with the top-blowing of oxygen jet injected through an oxygen lance so as to form an effective slag at an early stage of refining.

Steel making process

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Ibaraki, Japan

Nobuyoshi Hiroki