Blast furnace control method

Details Blast furnace control method Blast furnace control method

C - Chemistry, Metallurgy

21

B

39/54

C21B 7/00 (2006.01)

Patent

CA 1165561

BLAST FURNACE CONTROL METHOD Abstract of the Disclosure The substantially uniform operation of a blast furnace can be achieved by a feedback control scheme wherein the top gas is continuously analyzed and the analyses are stored in a computer. Periodically, the analyses are averaged and the averages are used in mass and heat balance calculations to compute a high temperature heat value (HTH). The (HTH) values so computed are stored in the computer and the average of the stored periodic (HTH) values over a preselected period of operation is computed. The differ- ences between the periodic (HTH) values and the average of the (HTH) values determined for the preselected period of operation are determined and these values are used to determine whether any changes are needed to be made to the temperature and/or moisture content of blast air introduced into the furnace through the furnace tuyeres during sub- sequent periods of operation. -1-

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