C
SECTION C — CHEMISTRY AND METALLURGY
 C

Note(s)

Definitions for Section C:

  • Alkali metals: Li, Na, K, Rb, Cs, Fr
  • Alkaline earth metals: Ca, Sr, Ba, Ra
  • Lanthanides: elements with atomic numbers 57 to 71 inclusive
  • Rare earths: Sc, Y, Lanthanides
  • Actinides: elements with atomic numbers 89 to 103 inclusive
  • Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
  • Halogens: F, Cl, Br, I, At
  • Noble gases: He, Ne, Ar, Kr, Xe, Rn
  • Platinum group: Os, Ir, Pt, Ru, Rh, Pd
  • Noble metals: Ag, Au, Platinum group
  • Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
  • Heavy metals: metals other than light metals
  • Iron group: Fe, Co, Ni
  • Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
  • Metals: elements other than non-metals
  • Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

  
METALLURGY
 C21
METALLURGY OF IRON
 C21C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON AND STEEL (refining or remelting metals in general C22B 9/00); TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS  [2]
 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-Martin 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 tuyeres of converters
 C21C 5/50
·  ·  ·  ·  Tilting mechanisms for converters
 C21C 5/52
·  Manufacture of steel in electric furnaces (electric heating per se H05B)
 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
Treating molten ferrous alloys, e.g. steel, not covered by groups C21C 1/00-C21C 5/00 (treating molten metals during moulding B22D 1/00, B22D 27/00; remelting ferrous metals C22B)
 C21C 7/02
( transferred to C21C 7/064 )
 C21C 7/04
·  Removing impurities by adding a treating agent
 C21C 7/06
·  ·  Deoxidising, e.g. killing
 C21C 7/064
·  ·  Dephosphorising; Desulphurising  [3]
 C21C 7/068
·  ·  Decarburising  [3]
 C21C 7/072
·  ·  Treatment with gases (C21C 7/06, C21C 7/064, C21C 7/068 take precedence)  [3]
 C21C 7/076
·  ·  Use of slags or fluxes as treating agents (C21C 7/06, C21C 7/064, C21C 7/068 take precedence)  [3]
 C21C 7/10
·  Handling in vacuum