C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/282, 53/361
C22B 5/02 (2006.01) C22B 9/10 (2006.01)
Patent
CA 1053008
ABSTRACT A method of operating converter furnace for treating matte, in which the blowing air volume supplied per unit time is controlled within a predetermined range such that the supply of a scheduled total blowing air volume for one of a plurality of stages of one cycle in the converter operation ends at a time possibly nearest to a scheduled end time of the blowing for said stage on the basis of the remaining air volume obtained by subtracting the real brown air volume for said stage at a desired time between the start and end of said stage from a scheduled total air volume to be supplied for said stage. In such method, when the blowing air volume supplied per unit time gets beyond said predetermined range at a time in a stage at least prior to the last stage subject to said cycle, the average blowing air volume to be supplied for the rest of said stage and the remaining stage or stages is determined by dividing the sum of the air volume of the remaining for said stage at a desired time and the total scheduled air volume to be supplied for the remaining stages or stage by the sum of the remaining blowing time for said stage and the scheduled blowing time for the remaining stage or stages, and a time required for carring out the subsequent blowing in said stage is determined by dividing the remaining air volume for said stage by said blowing air - 1 - volume supplied per unit time, by using said blowing air volume supplied per unit time whereby the actual blowing rate is controlled to said average blowing rate such that the supply of the scheduled total air volume for said stage ends at a time possibly nearest to the scheduled end time of the blowing for said stage. - 2 -
219823
Fukushima Koichi
Kimura Susumu
Michino Shizuo
Ogura Tsunekazu
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