SMELTING REDUCTION METHOD OF ORE USING COKE PACKING TYPE SMELTING REDUCTION FURNACE

摘要

PURPOSE: To make exhaust gas treatment equipment, etc., unnecessary by directly atomizing slurry raw material powder into a furnace from an atomizer arranged at the furnace top, drying, and collecting dust in the exhaust gas into the raw material powder by adsorption and reusing. ;CONSTITUTION: The slurry raw material powder produced at the other section is concentrated through a thicker 5 and a decanter 6 and atomized in the furnace by an atomizer 2 arranged at the furnace top of the vertical type smelting reduction furnace 1. The atomized slurry raw material powder is heated and dried with the high temp. exhaust gas in the furnace to be made into the dried raw material powder and the dust in the exhaust gas is absorbed and a part thereof is dropped in the furnace. The other large part of the raw material powder is discharged into a cyclone 7 together with the exhaust gas, and mixed material of the dried raw material powder and the dust in the exhaust gas piled and collected in the bottom part thereof are charged into a storing vessel 8. The mixed material in the storing vessel 8 is further injected into the furnace from a tuyere 3 through a uniform discharge pressure hopper 9 and an injection tank 10 and reused. By this method, the maintenance operating cost of the equipment and conveying cost of the recovery dust, etc., can be reduced.;COPYRIGHT: (C)1993,JPO&Japio