METHOD FOR CONTROLLING FLOW RATE OF OXYGEN IN SINTERING MACHINE

PURPOSE:To efficiently supply oxygen for combustion and to reduce production cost of sintered ore, by carrying out sintering while suitably controlling the ratio of introduced flow rate of oxygen for combustion to total flow rate of exhausted gas in wind box. CONSTITUTION:Sintering material is supplied from a material supply part 12 on a sintering bed 13 of Dwight-Lloyd sintering machine, ignited by an ignition furnace 4, air is downwardly sucked through the wind boxes 2, 2... linkedly provided to a main flue 3 and oxygen for combustion is supplied from upside through an oxygen blowing hood 6 to carry out sintering. In the sintering operation, flow meters 5, 5... are arranged to the boxes 2, 2 to measure respective exhausted gas flow rates, further total flow rate of exhausted gas is obtd. by adding calculation at an arithmetic adder 10. On the other hand, flow rate of the oxygen for combustion is measured by an oxygen flowmeter 9, and the ratio of introduced flow rate of the oxygen for combustion to the total flow rate of exhausted gas is controlled through an oxygen flow rate control valve 8 so that the ratio becomes