Method of decarburizing high cr molten metal

Details Method of decarburizing high cr molten metal Method of decarburizing high cr molten metal

C - Chemistry, Metallurgy

21

C

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C21C 5/35 (2006.01) C21B 13/00 (2006.01) C21C 5/00 (2006.01) C21C 7/068 (2006.01)

Patent

CA 1333663

The present invention relates to a method which may decarbu- rize high Cr molten metal for a short period of time under an atmospheric pressure, while checking loss of Cr by its oxidation. A basic feature of the invention is to blow from the furnace top lance a decarburizing O2 diluted by an inert gas into the high Cr molten metal supported in a container as well as blow the inert gas from bottom tuyeres so as to forcibly agitate the molten metal. Another feature of the invention is to control a slag amount during the above decarburizion blowing so as to check the Cr oxidation loss. A further object of the invention is to carry out a denitrification in the above decarburization, thereby to produce low N molten metal while checking the loss by Cr oxidat- ion.

576818

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