The major use of quicklime is in the basic oxygen steelmaking (BOS) process. Its usage varies from about 30 to 50 kilograms (65–110 lb) per ton of steel. The quicklime neutralizes the acidic oxides, SiO2, Al2O3, and Fe2O3, to produce a basic molten slag.
Ground quicklime is used in the production of aerated concrete such as blocks with densities of ca. 0.6–1.0 g/cm3 (9.8–16.4 g/cu in).
Quicklime and hydrated lime can considerably increase the load carrying capacity of clay-containing soils. They do this by reacting with finely divided silica and alumina to produce calcium silicates and aluminates, which possess cementing properties.
Small quantities of quicklime are used in other processes; e.g., the production of glass, calcium aluminate cement, and organic chemicals
Aside from its use to make Quicklime, Limestone the raw material is used globally in a variety of different ways including construction, agriculture and as industrial materials
Limestone can be processed into many various forms such as brick, cement, powdered/crushed, or as a filler