APPARATUS FOR INJECTING REDUCING AGENT INTO BLAST FURNACE AND METHOD FOR OPERATING BLAST FURNACE BY USING THE SAME

摘要

The natural gas, it is possible to reduce the coke ratio, the pressure loss without Sikkim occurs even in the case that the blown from the blast furnace tuyeres by a gaseous reducing material, and reducing re-blown in the blast furnace in which can suppress an increase in the temperature of the blast furnace robyeok to obtain a blast furnace operation method using the device and apparatus. Specifically, a device for blowing a gas reduced material from the blast furnace tuyere (1), and a gas-reduction re-blown lance (5) to blow the gas-reduction material, a tip end of the gas-reduction re-blown lance 5 for a reducing gas re-taken inlet (5a) was placed in a blast furnace tuyere (1) in the vicinity of the inner end portion (1a) which is located on. In addition, having a lance (7) for the solid reducing material blown, and the gas of the solid reducing material takes inlet (7a) located at the front end of the solid reducing material injection lance (7) for gas reduced re-blown lance 5 for It was placed in the air flow direction upstream of the air outlet. In addition, to have a tuyere set the projecting length of the inside in a 350~600mm from the inner wall (2) blast furnace. ; Hence, the drawings, the coke ratio, Lance, reducing materials, reduced efficiency, reduced reboiling, fishing methods