METHOD FOR RECOVERING SMALL-SIZED SINTERED ORE FROM FINAL SINTERED ORE SCREEN

摘要

PURPOSE:To easily and efficiently recover small-sized sintered ore on the ore discharge side by recovering the oversize sintered ore from a final sintered ore screen, separating an undersize chute into the ore supply side and ore discharge side by a tilting damper, and making the recovered grain size variable. CONSTITUTION:Sintered ore 5 is supplied onto the sieve 4 of the final sintered ore screen 1 having 5mm opening. The sintered ore 5 is thereby screened, and the oversize sintered ore 5a is recovered through an oversize chute 6 and transported to a blast furnace by a conveyor 8. Meanwhile, the fine sintered ore 5b having 3 mm grain size in the undersize is recovered in an undersize chute 2 on the ore supply side provided at the lower part of the final sintered ore screen 1, and delivered by a conveyor 9 as return ore. The small-sized sintered ore 5c having 3-5mm grain size is recovered in an undersize chute 3, and supplied to the blast furnace. In this case, the tilting damper 7 provided on the upper end of the boundary part between both chutes 2 and 3 is adjusted to control the content of the ore having 3mm grain size in the small-sized sintered ore 5c in the chute 3 to =30%, and the small-sized sintered ore is efficiently recovered with the convenient device.