Quick lime, also known as calcium oxide, is produced by heating limestone at very high temperatures in a process called calcination. This process removes carbon dioxide and produces a highly reactive compound. Quick lime is widely used in steel refining, environmental treatment systems, and chemical manufacturing. Its strong alkaline properties make it highly effective in neutralizing acidic waste materials and treating industrial wastewater. It is also used in construction projects for soil stabilization and improving the strength of building foundations and roads.