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CPC Subgroup
C21C 7/072

Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence)

Full Title

Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 (treating molten metals during moulding B22D1/00, B22D27/00; remelting ferrous metals C22B) > Removing impurities by adding a treating agent > Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence)