Iron Scrap

Iron - Iron from the blast furnace contains about 5% carbon which comes from the coke inside the furnace. It is cast into moulds called pigs and the iron is called cast iron or pig iron.
Molten scrap iron and molten scrap steel are mixed with molten iron from the blast furnace in a converter. This is the stage when scrap iron and steel are recycled. Carbon is removed from the mixture by bubbling pure oxygen through it. The oxygen reacts with the carbon to form carbon dioxide. Other non-metals in the mixture react with the oxygen to form acidic oxides. Calcium carbonate is then added to remove the acidic oxides. These reactions produce pure iron which is called wrought iron. The wrought iron can then be used to produce new products.