| 摘要 |
PROBLEM TO BE SOLVED: To manufacture sintered ore having excellent property to be reduced and high cold strength. SOLUTION: As pretreatment in a process for manufacturing blast furnace sintered ore using a downward-suction-type Dwight-Lloyd sintering machine, raw materials for sintering consisting of iron ore, SiO2 -containing raw material, limestone-type raw-material powder and solid-fuel-type raw-material powder are palletized using a drum mixer. At this palletizing: the raw materials for sintering, excluding the limestone-type raw-material powder and the solid-fuel- type raw-material powder, are charged through a charging port of the drum mixer to perform palletizing; the addition of the limestone-type raw-material powder and the solid-fuel-type raw-material powder is done in the region which is set up midway on the downstream side and in which residence time to the arrival of the raw materials for sintering at a discharge port of the drum mixer ranges from 10 to 90 seconds; and the limestone-type raw-material powder and the solid-fuel-type raw-material powder are allowed to adhere to the part to be coated of the raw materials for sintering in the course to the discharge port.
|
