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

Shiro Watakabe; Kanji Takeda; Hirobumi Nishimura; Shigeaki Goto; Nozomu Nishimura; Tetsuro Uchida; Mitsuru Kiguchi

doi:10.2355/isijinternational.46.513

Regular Article

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

Shiro Watakabe, Kanji Takeda, Hirobumi Nishimura, Shigeaki Goto, Nozomu Nishimura, Tetsuro Uchida, Mitsuru Kiguchi

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Keywords: high ratio, coke mixed charging, blast furnace, bell-less charging, simultaneous discharging, burden distribution, permeability, cohesive zone, coke size, high productivity, sinter ratio, low RAR

JOURNAL FREE ACCESS

2006 Volume 46 Issue 4 Pages 513-522

DOI https://doi.org/10.2355/isijinternational.46.513

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Abstract

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.

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