PRODUCTION OF SINTERED ORE

PURPOSE:To economically calcine lime stone and to improve cooling efficiency of a cooling machine by adding the lime stone having the specific grain size on upper layer part of sintered layer on a pallet, igniting, continuously removing the upper layer after calcining and taking out. CONSTITUTION:Bedding ore and raw material for sintering are in order supplied on the pallet in continuous type sintering machine 1 from hoppers 2, 3. The lime stone having 5-15mm grain size is added on the upper layer part of the sintered layer from the lime stone hopper 12 and mixed in the part to about 150mm depth from the surface by a mixing device 13. After that, burning is started at the surface of the sintered layer by an ignition furnace 4 and the lime stone is calcined together with the sintering raw material, to change into lime. Next, the upper layer part of sintered layer 5 cooled to near the room temp. is taken out through a removing device 6 and a belt conveyor 7 arranged on the sintering machine 1 and returned to sinter returns and recycled to the raw material for sintering as the lime raw material. On the other hand, the sintered ore, which becomes little quantity by removing the upper layer part, is sent to the cooling machine to efficiently cool.