Making pig-iron in the blast furnace

Introduced: September 1968

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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C21B 5/001 +3 CPC CPC only CPC only
C21B 5/006 CPC only CPC only
C21B 5/007 CPC only CPC only
C21B 5/008 CPC only CPC only
C21B 5/02 Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals +1 CPC IPC+CPC Available in IPC and CPC
C21B 5/04 Making slag of special composition IPC+CPC Available in IPC and CPC
C21B 5/06 using top gas in the blast furnace process (in coke ovens C10B) IPC+CPC Available in IPC and CPC