Effect of Coke Reactivity on Sinter Softening-melting Property by Simultaneous Evaluation Method of Carbonaceous and Ferrous Burdens in Blast Furnace

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 meth...

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Published inISIJ International Vol. 51; no. 8; pp. 1322 - 1332
Main Authors Sunahara, Kohei, Natsui, Takuya, Shizawa, Kyoichiro, Ujisawa, Yutaka
Format Journal Article
LanguageEnglish
Published The Iron and Steel Institute of Japan 01.01.2011
Subjects
blast furnace
coke
permeability
reactivity
shrinkage
sinter
softening-melting test
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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.
AbstractList 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.
Author Sunahara, Kohei
Shizawa, Kyoichiro
Natsui, Takuya
Ujisawa, Yutaka
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  organization: Corporate R&D Labs., Sumitomo Metal Industries, Ltd
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SubjectTerms blast furnace
coke
permeability
reactivity
shrinkage
sinter
softening-melting test
Title Effect of Coke Reactivity on Sinter Softening-melting Property by Simultaneous Evaluation Method of Carbonaceous and Ferrous Burdens in Blast Furnace
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