Kobe Steel, Ltd.

Kei Utsunomiya

Masahiro Tomita

Dentaro Kaneko

Mamoru Aoki

Katsunori Shimasaki

Yutaka Mito

Yoshitomo Ishii

Michiko Masaki

Kazuya Soga

Shigeru Haseba

Hironobu Sako

Mamoru Oaki

Katsunori Shimazaki

Hiroetu Miki

A process for the direct reduction of iron oxide by blowing into a reduction furnace a reducing gas which is prepared by reforming a mixture of a reduction furnace exhaust gas and a gas mainly composed of methane, which comprises the steps of dividing the gas mainly composed of methane into two branch streams, mixing the first branch stream gas with a part of the reduction furnace exhaust gas and supplying the resulting mixture to the externally heated reformer furnace, to produce a high-temperature reformed gas; mixing the second branch stream gas with said high-temperature reformed gas and during the course to the reduction furnace, subjecting the mixture to endothermic reforming reactions in an after-reactor without external heating, utilizing the sensible heat of the high-temperature mixed gas, controlling the self-reforming reactions so as to lower the temperature and simultaneously adjust the composition of the high-temperature mixed gas, and blowing the reducing gas obtained into the reduction furnace. Effective use of the sensible heat can be achieved.

Direct reduction process for producing metallic iron

A catalyst for catalytically reducing nitrogen oxides present in an exhaust gas in the presence of a reducing gas to convert said nitrogen oxides to harmless substances, which comprises a mixture consisting essentially of the oxides of V and Nb.

Catalyst for converting nitrogen oxides and method for converting

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Kobe, Japan

Kei Utsunomiya