Used extensively in the steel industry to remove impurities during the production of steel. It acts as a flux, combining with silica and other impurities to form slag. Also widely used in water treatment to adjust pH and soften water by removing hardness. In the construction sector, it is a key component in the production of cement and mortar. Employed in flue gas desulfurization to reduce sulfur dioxide emissions from power plants. Additionally, utilized in the production of chemicals, paper, and in agriculture to neutralize acidic soils.