Research and Development > JFE TECHNICAL REPORT > No.13 Special Issue on “Ironmaking Technology” and “Slag Products” > Application of High Ratio Coke Mixed Charging Technique to Blast Furnace

No.13 Special Issue on “Ironmaking Technology” and “Slag Products”

Application of High Ratio Coke Mixed Charging Technique to Blast Furnace

WATAKABE Shiro     MURAO Akinori     GOTO Shigeaki

Abstract

Technique for high-ratio coke-mixed-charging was developed and applied at No. 6 blast furnace in JFE Steel’s East Japan Works (Chiba District) 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 behavior of mixed layer have made it possible. Also, FCG(Flow Control Gate)-Dynamic charging method improved ratio of uniformly mixed coke. Since April 2002, high productivity and low RAR operation with the world’s lowest level of sinter ratio has been conducted using high-ratio coke-mixed-charging technique.

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