Question

What is the role of a flux in carbon reduction process?

Answer 1

1. Flux is added to the roasted ore before heating in the blast furnace.
2. It helps to remove impurities from the ore by combining with them.
3. Flux reacts with acidic impurities, if present, like silica, to form slag.
4. If impurities are basic, an acidic flux like silica is used.
5. The slag formed is fusible and lighter, floating on molten metal, and can be removed easily.
6. This purifies the molten metal by separating impurities as slag.
7. The choice of flux depends on the nature of impurities that form a suitable slag.

This ensures efficient removal of impurities during the carbon reduction process in metallurgy.