the source of the steel is iron ore, iron (Fe) exist in nature in the form of pure iron in nature does not exist, iron ore is divided into magnetite, hematite, limonite iron ore three, these are the iron oxides, the difference lies in the way of their oxidation. The higher the iron content in iron ore, the better, the theoretically iron ore in the highest iron content of about 72% iron content above 60% as rich iron ore. Iron ore in the furnace first reduced to iron (pig iron), and then into the steelmaking furnace decarburization refining steel scrap in the steelmaking furnace smelting regeneration. Generally made of steel in accordance with the intended use nature, shapes of goods, the so-called iron and steel products. Usually steel products, iron ore reduction and melting into pig iron (refining milling), pig iron is refined into steel (steel), steel re-rolling, made from a variety of processed steel products, broad iron and steel products include cast iron, cast steel, forged steel products and steel processing products.