APPARATUS FOR MANUFACTURING MOLTEN PIG IRON AND REDUCED IRON BY UTILIZING FLUIDIZED BED, AND METHOD THEREFOR

摘要

An apparatus and a method for manufacturing molten pig iron by using a fine iron ore are disclosed. Coal is used to produce a reducing gas, and a fine iron ore is used to produce a molten iron and a reduced iron in a simple and efficient manner. The apparatus for manufacturing a molten iron by directly using coal as the fuel according to the present invention is characterized as follows. A high temperature reducing gas is sent from a melter-gasifier (11) for a fluidized bed lime stone calcining furnace (12) to calcine lime stone. Then the reducing gas is supplied to a second fluidized bed reducing furnace (13) so as to manufacture a reduced iron directly. An off-gas from the second fluidized bed reducing furnace (13) is supplied to a first fluidized bed reducing furnace (14) (disposed above the second fluidized bed reducing furnace (13)) to pre-heat and pre-reduce the fine iron ore. The calcined lime stone and the finally reduced iron are supplied to a melter-gasifier (11) to manufacture a molten pig iron.