- Anthracite is used as a foaming agent to create a slag layer on top of the molten steel. This slag layer performs several vital functions:
- Protects the furnace lining from the high temperatures of the molten steel.
- Improves heat transfer from the electric arc to the steel.
- Absorbs impurities from the steel, leading to cleaner steel production.
- This phase involves anthracite injection through a lance into the furnace. The volatile matter in the coal burns rapidly, creating a foamy slag layer.
- The foaming process typically takes place during the refining stage of steelmaking.
