Blast furnace example sentences

Metallurgical coal is high grade bituminous coal which has a special value for smelting iron in blast furnaces.The raw material is put in the blast furnace where it undergoes smelting (Figure 6).Limestone is the basic raw material for the cement industry and essential for smelting iron ore in the blast furnace.Non-biodegradable wastes are generated by thermal power plants which produce fly ash; integrated iron and steel plants which produce blast furnace slag and steel melting slag.