Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Regular Article
Effect of Coke Reactivity on Sinter Softening-Melting Property by Simultaneous Evaluation Method of Carbonaceous and Ferrous Burdens in Blast Furnace
Kohei SunaharaTakuya NatsuiKyoichiro ShizawaYutaka Ujisawa
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2012 Volume 98 Issue 7 Pages 331-340

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Abstract

In future blast furnace operation which aims at low carbon consumption, it is indispensable to optimize the quality of carbonaceous and ferrous burdens, not evaluations of each individual but both sides of them considering interactions under the coexistence. Therefore, a simultaneous evaluation method of carbonaceous and ferrous burdens at cohensive zone of blast furnaces by softening-melting test which simulated the temperature profile in blast furnaces determined by reactivity of coke was developed. The effect of sinter ore reducibility and coke reactivity on sinter soften-melting property at cohensive zone of blast furnaces were evaluated. With increasing CRI, coke reactivity, gasification start temperature lowers as a result of increasing the reduction rate of sinter at 900∼1000°C and increasing softening shrinkage resistance at the initial stage of the shrinkage near 1200°C.

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© 2012 The Iron and Steel Institute of Japan
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