Iron blast furnace is the role of the blast furnace heated to the price required hot stove temperature, in order to improve the efficiency and efficiency of blast furnace; it is according to "heat" principle of work. In the combustion chamber in the combustion of gas, high temperature exhaust gas through the lattice brick and make it heat, when the lattice brick fully heated, the hot air furnace can be replaced by air, this time the combustion valve closed, air valve open, The checker bricks are heated and sent out. The blast furnace is equipped with 3-4 hot blast stoves 'single furnace air supply', two or three heating, a supply air; alternately changing 'parallel air supply', two heating.