MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00; electric heating H05B)

Introduced: September 1968

Description

C21B covers the production processes and technologies for manufacturing iron and steel, including ore reduction, pig iron production, and steel-making methods. The subclass encompasses both traditional and modern techniques such as blast furnace operation, direct reduction processes, electric arc furnace steelmaking, and oxygen converter steelmaking. It includes related aspects of heat treatment, casting, and refining of steel products during manufacture. Adjacent class C21C addresses the processing and treatment of steel after initial manufacture, while C21B focuses on the primary conversion and formation stages from raw materials to finished steel products.

Title

Titles differ between systems:

IPC: MANUFACTURE OF IRON OR STEEL

CPC: MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00; electric heating H05B)

Full Title

Full titles differ between systems:

IPC:

MANUFACTURE OF IRON OR STEEL

CPC:

MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00; electric heating H05B)

Of 11 combined children, 7 exist in both systems.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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C21B 11/00 Making pig-iron other than in blast furnaces IPC+CPC Available in IPC and CPC
C21B 13/00 Making spongy iron or liquid steel, by direct processes +9 CPC IPC+CPC Available in IPC and CPC
C21B 15/00 Other processes for the manufacture of iron from iron compounds (general methods of reducing to metal C22B5/00; by electrolysis C25C1/06) +2 CPC IPC+CPC Available in IPC and CPC
C21B 2100/00 Handling of exhaust gases produced during the manufacture of iron or steel 2nd only +4 CPC CPC only CPC only
C21B 2200/00 Recycling of non-gaseous waste material 2nd only CPC only CPC only
C21B 2300/00 Process aspects 2nd only +2 CPC CPC only CPC only
C21B 2400/00 Treatment of slags originating from iron or steel processes 2nd only +4 CPC CPC only CPC only
C21B 3/00 General features in the manufacture of pig-iron (mixers for pig-iron C21C1/06) IPC+CPC Available in IPC and CPC
C21B 5/00 Making pig-iron in the blast furnace +4 CPC IPC+CPC Available in IPC and CPC
C21B 7/00 Blast furnaces (lifts associated with blast furnaces B66B9/06) +2 CPC IPC+CPC Available in IPC and CPC
C21B 9/00 Stoves for heating the blast in blast furnaces IPC+CPC Available in IPC and CPC