Method for carburizing sponge iron

Details Method for carburizing sponge iron Method for carburizing sponge iron

C - Chemistry, Metallurgy

22

B

53/32

C22B 5/12 (2006.01) C21B 13/00 (2006.01) C21B 13/02 (2006.01)

Patent

CA 1149176

ABSTRACT OF THE DISCLOSURE Sponge iron is carburized in the cooling zone of a vertical shaft iron ore reduction reactor by causing a carbon- containing gas to circulate in a closed loop including the cooling zone of the reactor and an external conduit containing a quench cooler and a pump. Improved control of the carbur- ization of the sponge iron is achieved by measuring the specific gravity of the circulating gas and using the measured specific gravity value as a control variable effectively to regulate the flow of make-up carbon-containing gas to the cooling loop.

352976

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