CPC Subclass Not Allocatable
C21B MANUFACTURE OF IRON OR STEEL (preliminary treatment of ferrous ores or scrap C22B1/00; electric heating H05B)
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.
11 direct subcodes
Child Classifications
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- C21B 11/00 Making pig-iron other than in blast furnaces
- C21B 13/00 Making spongy iron or liquid steel, by direct processes
- 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)
- C21B 2100/00 Handling of exhaust gases produced during the manufacture of iron or steel
- C21B 2200/00 Recycling of non-gaseous waste material
- C21B 2300/00 Process aspects
- C21B 2400/00 Treatment of slags originating from iron or steel processes
- C21B 3/00 General features in the manufacture of pig-iron (mixers for pig-iron C21C1/06)
- C21B 5/00 Making pig-iron in the blast furnace
- C21B 7/00 Blast furnaces (lifts associated with blast furnaces B66B9/06)
- C21B 9/00 Stoves for heating the blast in blast furnaces