期刊
IRONMAKING & STEELMAKING
卷 50, 期 8, 页码 1094-1103出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03019233.2023.2200621
关键词
Coke reactivity; sinter; softening-melting behaviours; gas utilization; low-carbon; blast furnace; gasification
The use of high reactivity coke in blast furnaces is a key aspect of low-carbon development. This study examined the impact of coke reactivity on the softening-melting behaviors of sinter. It was found that as coke reactivity increased, the gasification temperature of coke decreased. Increasing coke reactivity from 24.75% to 45.11% resulted in an increase in initial melting temperature, a decrease in dripping temperature, and a decrease in melting region. The cohesive zone also shifted downward and narrowed, while the permeability index and highest differential pressure decreased.
The use of high reactivity coke in blast furnaces is an important direction for low-carbon development. In this study, we investigated the effect of coke reactivity on the softening-melting behaviors of the sinter. The results show that the gasification temperature of coke decreased with increasing coke reactivity. With increasing coke reactivity from 24.75% to 45.11%, the initial melting temperature rose from 1294 degrees C to 1312 degrees C, the dripping temperature dropped from 1522 degrees C to 1507 degrees C and the melting region decreased from 228 degrees C to 195 degrees C, respectively. The cohesive zone shifted downward and the thickness narrowed. The permeability index and highest differential pressure dropped from 1219.67 KPa center dot degrees C to 607.61 KPa center dot degrees C and from 7.0962 KPa to 4.8523 KPa, respectively. Coke with high reactivity can improve the gas permeability of burden. The gas utilization ratio in the softening-melting and dripping processes of the sinter raised by about 2% with increasing coke reactivity.
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