Process for the manufacture and use of high purity...

Details Process for the manufacture and use of high purity... Process for the manufacture and use of high purity...

C - Chemistry, Metallurgy

21

B

53/24, 23/310

C21B 5/02 (2006.01) C01B 31/00 (2006.01) C01B 31/02 (2006.01) C21B 5/06 (2006.01)

Patent

CA 1149135

ABSTRACT Substantially ash-free carbonaceous reductant for use in reduction processes is made by recovering carbon from unused carbon monoxide. The carbon monoxide contacts a catalyst which promotes formation of carbon on the catalyst. Since the off-gases from many metal ore reduction processes employing coke include a significant quantity of carbon monoxide, this carbon monoxide may be recovered and used to form the reductant which is fed to the reduction process to replace a part of the coke consumed. Provided most of the carbon monoxide in the off-gases is utilized, very favorable cost savings are achieved when the ash-free reductant is used in place of the coke. Moreover, in some instances, the ore being reduced may be used as the catalyst. Since this ore-catalyst is at least partially reduced during manu- facture of the reductant, a benefit is obtained.

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