C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22C—ALLOYS
C22C35/00—Master alloys for iron or steel
C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
C—CHEMISTRY; METALLURGY
C21—METALLURGY OF IRON
C21B—MANUFACTURE OF IRON OR STEEL
C21B13/00—Making spongy iron or liquid steel, by direct processes
C21B13/008—Use of special additives or fluxing agents
C—CHEMISTRY; METALLURGY
C21—METALLURGY OF IRON
C21B—MANUFACTURE OF IRON OR STEEL
C21B5/00—Making pig-iron in the blast furnace
C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
C—CHEMISTRY; METALLURGY
C21—METALLURGY OF IRON
C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
C21C7/0006—Adding metallic additives
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P10/00—Technologies related to metal processing
Y02P10/20—Recycling
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