C21B - CPC Classification

• C21B11/00 » Making pig-iron other than in blast furnaces 20
• C21B13/00 » Making spongy iron or liquid steel, by direct processes 42
• C21B15/00 » Other processes for the manufacture of iron from iron compounds 70
• C21B2100/00 » Exhaust gases 7
• C21B2200/00 » Recycling of waste material 33
• C21B2300/00 » Process aspects 1
• C21B3/00 » General features in the manufacture of pig-iron 15
• C21B5/00 » Making pig-iron in the blast furnace 27
• C21B7/00 » Blast furnaces 21
• C21B9/00 » Stoves for heating the blast in blast furnaces 9