Metal refining method using differing refining oxygen sequence

C - Chemistry – Metallurgy – 21 – C

Patent

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C21C 7/072 (2006.01) B22D 11/117 (2006.01) C21C 5/32 (2006.01) C21C 5/46 (2006.01) C21C 7/04 (2006.01) C21C 7/068 (2006.01) C21C 5/52 (2006.01)

Patent

CA 2379591

A metal refining method particularly useful with a basic oxygen steelmaking process, wherein during an initial period, refining oxygen is provided into the furnace headspace surrounded by a shroud comprising oxygen and inert gas, and during a subsequent period refining oxygen is provided into the furnace headspace surrounded by a frame shroud.

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