Nippon Steel Corporation

Kobe Steel, Ltd.

Jfe Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Nisshin Steel Co., Ltd.

Nippon Steel & Sumikin Engineering Co., Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Yutaka Ujisawa

Takanobu Inada

Hiroshi Sakai

A method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a gas mixture which contains a reducing gas and a nitrogen gas, and has a predetermined temperature, is blown into the shaft furnace. The reducing gas contains 90 volume % or more of a hydrogen gas.

Method for producing reduced iron

A method for operation of a blast furnace able to greatly reduce the COemission and enabling stable production of pig iron over a long period of time in a commercial blast furnace, that is, a method for operation of a blast furnace in which iron ore and coke are charged from a furnace top and is blown in pulverized coal from a usual tuyere, comprising blowing in a gas containing at least one of hydrogen and hydrocarbon from the usual tuyere together with the pulverized coal and blowing a gas comprised of a top gas of the blast furnace from which carbon dioxide and steam is removed from a shaft tuyere into the blast furnace.

Method for operation of blast furnace

Growing community of inventors

Tokyo, Japan

Yutaka Ujisawa