Effect of coke quality on blast-furnace performance indices

Курунов, И. Ф.; Emel’yanov, V. L.; Титов, В. Н.; Kakunin, V. V.

doi:10.1007/s11015-007-0116-z

Cited by 3 publications

(1 citation statement)

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“…Previous studies show that when the CRI increases by 1%, the fuel ratio increases by 1.1%, and production decreases by 1.2% [ 9 ]. Kurunov [ 10 ] considered that the effect of coke quality on blast furnaces was related to production intensity, and this effect enhanced when the production intensity was high. The CRI test method only reflects the reaction of CO 2 with coke at 1100°C, but the actual environment in a blast furnace is more complex than the test condition.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive investigation of the reaction behaviorial features of coke with different CRIs in the simulated cohesive zone of a blast furnace

Tian

Zhou

et al. 2021

PLoS ONE

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The reaction characteristics and mechanism of coke with different coke reactivity indices (CRIs) in the high-temperature zone of a blast furnace should be fully understood to correctly evaluate the coke quality and optimize ironmaking. In this work, low-CRI coke (coke A) and high-CRI coke (coke B) were charged into a thermogravimetric analyzer to separately study their microstructural changes, gasification characteristics, and reaction mechanism under simulated cohesive zone conditions in a blast furnace. The results show that both coke A and coke B underwent pyrolysis, polycondensation, and graphitization during the heat treatment. The pyrolysis, polycondensation, gasification speed, and dissolution speed rates of coke B were higher than those of coke A. Direct and indirect reduction between sinter and coke occurred in the cohesive zone and had different stages. The consumption rate of coke B was faster than that of coke A during the coke–sinter reduction. The carbon molecules of coke A must absorb more energy to break away from the skeleton than those of coke B.

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Section: Introductionmentioning

confidence: 99%