PURPOSE: To produce sintered ore having the sintering yield and strength uniform over the entire layer by setting the coke content in the region of the specific depth at the specific width from both side walls of a pallet of the raw material layers to be sintered formed on the moving pallet higher than the coke content in the other regions.
CONSTITUTION: The raw materials 2 which are sintered and are mixed with powder coke at an ordinary ratio are charged from an ore feed hopper 9 via a drum feeder 5, etc., onto the moving pallet 1 of a Dwight-Lloyd sintering machine to pack the material at a prescribed thickness via an ultrasonic level meter 13. The raw materials 3 which are to be sintered and are mixed with the cake at the higher coke content, for example, 8 to 15wt.%, on both sidewall sides of the pallet and the raw materials 2 which are to be sintered and are mixed with the coke at the ordinary coke content in the central part are charged onto the raw material layers 2 to be sintered from a two-stage charging hopper 8 disposed downstream thereof. At this time, the raw material layers 3 to be sintered are formed to the depth of 40 to 50mm from the surface layer at 10 to 15% of the overall transverse length respectively from both sidewalls of the pallet by adjusting the layers with a cut off plate 14. The raw material layers 2, 3 to be sintered are thereafter ignited in an ignition furnace 4 and air is sucked below, by which the sintering is executed.
YASUDA MOTOO
WATANABE MINORU
