C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
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53/75
C21C 1/00 (2006.01) C21C 1/02 (2006.01) C21C 5/28 (2006.01) C21C 5/56 (2006.01) C21C 7/064 (2006.01) C21C 7/072 (2006.01) C21C 1/04 (2006.01)
Patent
CA 1166018
- 36 - A STEELMAKING PROCESS WITH SEPARATE REFINING STEPS ABSTRACT OF THE DISCLOSURE The present invention relates to a steelmaking process, in which the molten pig iron produced in a blast furnace is desiliconized, dephosphorized, decarburized and desulfurized. The characteristic of this invention is a sequence and combination of the refining steps. Namely, the steelmaking process of this invention has individual separate refining steps for realizing a removal reaction of the impurities. The objective reaction is the desilicon- ization in the first step, the dephosphorization in the second step, the decarburization in the third step and the desulfurization in the fourth step.
373463
Goto Hiroki
Nakashima Hiroyuki
Sumida Morihiro
Goudreau Gage Dubuc
Nippon Steel Corporation
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