C21BLevel 3

MANUFACTURE OF IRON OR STEEL

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C21B 11/00Making pig-iron other than in blast furnaces

C21B 13/00Making spongy iron or liquid steel, by direct processes

C21B 15/00Other processes for the manufacture of iron from iron compounds

C21B 2100/00Handling of exhaust gases produced during the manufacture of iron or steel

C21B 2200/00Recycling of non-gaseous waste material

C21B 2300/00Process aspects

C21B 2400/00Treatment of slags originating from iron or steel processes

C21B 3/00General features in the manufacture of pig-iron

C21B 5/00Making pig-iron in the blast furnace

C21B 7/00Blast furnaces

C21B 9/00Stoves for heating the blast in blast furnaces

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