Fluxing Agent: Limestone is added to blast furnaces to remove impurities like sulfur and phosphorus from molten iron, forming slag that helps purify the final product.

Raw Material: Combined with iron ore and coke in blast furnaces, limestone plays a key role in the production of molten iron, which is further processed into steel.

Composition Adjuster: Limestone helps regulate the levels of impurities, such as sulfur and phosphorus, in the final steel product, ensuring its quality and desired characteristics.

Desulfurization: Limestone reacts with sulfur in molten iron to form calcium sulfide, which is easily removed, reducing sulfur content in steel and improving its performance.

Slag Formation: Limestone facilitates the formation of slag during iron and steel production, assisting in the removal of impurities.

Refractory Life: Dolomitic lime, a variant of limestone, helps extend the life of furnace refractory linings by reducing the dissolution of magnesium oxide into the steel slag.