Steel mills are industrial facilities where raw materials, primarily iron ore, coal, and limestone, are processed to produce steel. The process involves several stages, including smelting, refining, and casting, which transform these raw materials into various steel products used in construction, manufacturing, and other industries. These mills can be classified into two main types: integrated mills and mini-mills. Integrated mills use a blast furnace to produce steel from iron ore, while mini-mills primarily recycle scrap metal. Both types play a crucial role in the global economy, supporting infrastructure development and manufacturing processes.