C
SECTION C — CHEMISTRY AND METALLURGY
  
METALLURGY
 C21
METALLURGY OF IRON
 C21C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON AND STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS (refining metals in general C22B 9/00)
 C21C 1/00
Refining of pig-iron; Cast iron
 C21C 1/02
·  Dephosphorising or desulphurising
 C21C 1/04
·  Removing impurities other than carbon, phosphorus, and sulphur
 C21C 1/06
·  Constructional features of mixers for pig-iron
 C21C 1/08
·  Manufacture of cast-iron
 C21C 1/10
·  Making spheroidal graphite cast-iron
 C21C 3/00
Manufacture of wrought-iron or wrought-steel
 C21C 5/00
Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel
 C21C 5/02
·  Crucible furnace process
 C21C 5/04
·  Manufacture of hearth-furnace steel, e.g. Siemens-Marten steel
 C21C 5/06
·  ·  Processes yielding slags of special composition
 C21C 5/28
·  Manufacture of steel in the converter
 C21C 5/30
·  ·  Regulating or controlling the blowing
 C21C 5/32
·  ·  ·  Blowing from above
 C21C 5/34
·  ·  ·  Blowing through the bath
 C21C 5/36
·  ·  Processes yielding slags of special composition
 C21C 5/38
·  ·  Removal of waste gases or dust
 C21C 5/40
·  ·  ·  Offtakes or separating apparatus for converter waste gases or dust
 C21C 5/42
·  ·  Constructional features of converters
 C21C 5/44
·  ·  ·  Refractory linings
 C21C 5/46
·  ·  ·  Details or accessories
 C21C 5/48
·  ·  ·  ·  Bottoms or tuyères of converters
 C21C 5/50
·  ·  ·  ·  Tilting mechanisms for converters
 C21C 5/52
·  Manufacture of steel in electric furnaces
 C21C 5/54
·  ·  Processes yielding slags of special composition
 C21C 5/56
·  Manufacture of steel by other methods (making liquid steel by direct processes C21B 13/00)
 C21C 7/00
Treatment in the molten state of steel, steel alloys, or ferrous alloys
 C21C 7/02
·  Dephosphorising (C21C 5/28 takes precedence); Desulphurising
 C21C 7/04
·  Removing other impurities
 C21C 7/06
·  ·  Deoxidising
 C21C 7/08
·  ·  ·  Killing
 C21C 7/10
·  Handling in vacuum