Beginning of Essay
Purifying pig iron produces steel, to get rid of the many impurities during smelting. I am going to explain how this is done, and the uses of steel produced in four furnaces. BASSEMER CONVERTER This was made in England. Molten pig iron was change to steel when ai ....

Middle of Essay
.... in steelmaking have come from the use of oxygen gas instead of air to burn the impurities in molten iron. OPEN HEARTH FURNACE Siemens brothers in the middle of the nineteenth century made this method in the country of England. This instrument supplies Three quarters of the world steel. The metal in the furnace is contained in a shallow bath, which is surrounded by walls and a roof of brick for fire. Moving doors are which raw materials a crane that is a mobile insert in. Molten iron from the blast furnace, together with scrap and pig iron make up the charge. The tap hole is located in the back wall; ports are in the sidewalks, through which ....