PURPOSE: To properly and surely maintain the furnace pressure in an ignition furnace and also to reduce the unit requirements of fuel in the ignition furnace, by regulating a damper provided in a wind leg so that pressure in a wind box right under the ignition furnace is adjusted to the prescribed pressure.
CONSTITUTION: A raw material 14 placed on a moving pallet 26 is ignited by means of the ignition furnace 32 provided above the pallet 26 and then is subjected to suction of air by a exhauster 36 via a wind box 34 and a wind leg 38 provided right under the pallet 26, by which fuel in the above raw material 14 is burnt to produce a sintered ore. In a Dwight Lloyd sintering machine having above-mentioned constitution, the furnace pressure in the above ignition furnace 32 is detected with a pressure detector 50, and the pressure in the above wind box 34 is set up by means of a control device 52 so that above-mentioned detected value of the furnace 32 pressure is adjusted to the desired pressure. Based on the above set value, the opening of the damper 46 in the above wind leg 38 is controlled by means of a control device 56 so that observed value of the pressure in the wind box 34 detected by a pressure detector 54 is regulated to about -100W-500mmH2O. In this way, the furnace pressure of the ignition furnace 32 can be maintained at a value in the range of -0.1W0.5mmH2O.
NIKO KIYOSUKE
NAKAJIMA YOSHIYUKI
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