Nippon Steel Corporation

Ishikawajima-harima Jukogyo Kabushiki Kaisha

Naoki Otsuki

Hiroshi Hasegawa

Osamu Takeuchi

Katsuyoshi Kobayashi

Susumu Izumi

A heating furnace in which radiant tubes are extended widthwise into the furnace so that the products of combustion are discharged into the furnace, whereby intermediate shapes such as slabs which are transported through the furnace are heated to desired rolling temperatures.

Metal heating furnace

A shaft reduction furnace is provided with a pressure equalizing chamber for supplying raw materials such as ores in the furnace. The interior of the furnace is separated by a dividing plate into an upper portion and a lower portion. A pipe path through the dividing plate communicates the upper portion with lower portion. The upper portion and the pipe path form an inside ore hopper for supplying ore continuously into the lower portion of the furnace, thus omitting the conventional ore hopper of pressure-proof-structure provided separately outside of the furnace.

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Himeji, Japan

Naoki Otsuki