Shaft furnace arrangement for the direct reduction of iron ores

Details Shaft furnace arrangement for the direct reduction of iron ores Shaft furnace arrangement for the direct reduction of iron ores

C - Chemistry, Metallurgy

21

B

39/64

C21B 13/02 (2006.01)

Patent

CA 1255498

ABSTRACT OF THE DISCLOSURE There is disclosed a shaft furnace for the direct reduc- tion of iron ores. It includes a gas feed device arranged centrally in the bottom of the shaft furnace in the longi- tudinal axis of the shaft furnace and having a central cavity. From the cavity, a plurality of gas outlets for the reduction gas, superposed in storeys and passing through the gas feed device in its upper part, lead into the interior of the shaft furnace. In order to provide a shaft furnace with which operational failures caused by the gas feed device are prevented and with which the gas feed device is subject to little wear so that it need be exchanged in large time intervals only, the gas feed device is designed as a double-shelled hollow body. The shell interspace of the hollow body is connected to at least one supply duct and at least one discharge duct for a coolant. - 11 -

488450

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