Development of High Ratio Coke Mixed Charging Technique to the Blast Furnace

• Published in: ISIJ International Vol. 46; no. 4; pp. 513 - 522
• Main Authors: Watakabe, Shiro, Takeda, Kanji, Nishimura, Hirobumi, Goto, Shigeaki, Nishimura, Nozomu, Uchida, Tetsuro, Kiguchi, Mitsuru
• Format: Journal Article
• Language: English
• Published: Tokyo The Iron and Steel Institute of Japan 2006; Iron and Steel Institute of Japan
• Subjects: Applied sciences; bell-less charging; blast furnace; burden distribution; cohesive zone; coke mixed charging; coke size; Exact sciences and technology; high productivity; high ratio; low RAR; Metals. Metallurgy; permeability; Powder metallurgy. Composite materials; Production techniques; simultaneous discharging; sinter ratio; Sintered metals and alloys. Pseudo alloys. Cermets; Productivity; sinter ratio; Coke; permeability; Powder metallurgy; high productivity; low RAR; coke mixed charging; Pig iron manufacture; Blast furnace; Magnetic permeability; high ratio; Sintering; simultaneous discharging; Development; bell-less charging; cohesive zone; burden distribution; coke size
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.46.513

Technique for high ratio coke mixed charging was developed and applied at JFE Steel's East Japan Works (Chiba District) No. 6 blast furnace as the first case of application to a large blast furnace. Simultaneous discharging of ore and coke from the top bunkers, and the precise control of burden distribution technique with the mathematical model considering the segregation behabior of mixed layer have made it possible. Since April 2002, high productivity operation with the world's lowest level of sinter ratio has been conducted using high ratio coke mixed charging technique.