RAW MATERIAL CHARGING METHOD FOR BLAST FURNACE

• Main Authors: HONDA KEISUKE, YATANI SUSUMU, NOMA FUMIO
• Format: Patent
• Language: English
• Published: 17.12.1987
• Subjects: CHEMISTRY; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON

PURPOSE:To maintain stable center gas flow in a blast furnace by charging most of necessary cokes on the whole cross section of the blast furnace as layer and separately charging the remained cokes at the center part of the furnace. CONSTITUTION:The most of necessary cokes are charged as changing gradually the discharging part at lower end part of a rotating chute 11 from inclined angle theta1 in the range from the middle point between the furnace center and the furnace wall 12 to the furnace wall 12, to form the coke layer 14 on ore layer 13. Then, as the coke in the coke layer 14 is gradually flowed from the furnace wall side toward the furnace center part, the layer thickness is almost uniformized. Next, the rotating chute 11 is positioned at the furnace center line, and the remaining cokes are charged to form slightly elevated coke boundary 14a at the center part on the coke layer 14. Further, the ore layer 13 is formed on this, to obstruct flowing of the ore further into the center part by the center part coke boundary 14a. In this way, the coke layer 14 and the ore layer 13 are piled alternately and in the furnace center part, the columnar coke boundary composing of coke only is formed.