Kobe Steel, Ltd.

Koichi Morioka

Takeshi Sugiyama

Takao Harada

Hidetoshi Tanaka

Hiroshi Sugitatsu

Masahiko Tetsumoto

Kojiro Fuji

Yoshiyuki Matsui

Hiroshi Tamazawa

Jyunpei Kiguchi

Takeshi Maki

Tadashi Ueda

Nobuyuki Iwasaki

A method for making reduced iron using blast-furnace sludge is provided. The method includes a mixing step of mixing the blast-furnace sludge and an iron-oxide-containing powder to prepare a mixed material, an agglomerating step of agglomerating the mixed material to form agglomerates, a feeding step of feeding the agglomerates onto a continuously moving hearth, and a reducing step of heating the agglomerates to remove zinc and reduce the agglomerates.

Method for making reduced iron

A process for producing fired pellets by granulating finely-ground iron ore and subjecting the resulting granules sequentially to drying, dehydration, preheating, and firing, wherein said process comprises adding an additive to said finely-ground iron ore at the time of granulation, said additive reacting with iron ore to form a compound which has a melting point lower than the preheating temperature. Owing to the additive (or sintering auxiliary) added in a small amount to iron ore powder, it is possible to produce preheated pellets by using the existing grate kiln without increasing the amount of preheating energy. The resulting preheated pellets have improved strength and produce no adverse effect on finished pellets.

Production of iron ore pellets

Growing community of inventors

Kakogawa, Japan

Koichi Morioka