Steel manufacturing is the process of producing steel from raw materials, primarily iron ore, coal, and limestone. The main method used is the blast furnace, where these materials are heated to high temperatures to create molten iron. This molten iron is then converted into steel by removing impurities and adding alloying elements. After the steel is produced, it undergoes various processes such as casting, rolling, and forging to shape it into usable products. Steel can be made into different grades and forms, including sheets, beams, and bars, which are essential for construction, automotive, and manufacturing industries.