ISSN 2594-357X
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Recently, the improvement of coupling effect of iron ore reduction and coke gasification reactions have been concerned much in order to decrease reducing agent rate in blast furnace. High reactive coke could improve the reduction efficiency of iron ores in lump zone significantly, which has also been proved in our former study. Therefore, in this paper the influence of burden distribution (includes layered and mixed distributions) on coke gasification and iron ore reduction was laboratory investigated by using high reactive coke. The results showed that with the increase of layered number under the condition of layered distribution, the contact surface of iron ores and cokes are increased, which improves the reactions of coke gasification and iron ore reduction. Compared with layered distribution, mixed distribution had relatively low coke gasification and iron ore reduction at low temperature of 1173 K. When the reaction temperature increased to 1373 K, the direct reduction between iron ore and coke developed, which increased the coupling effect of iron ore reduction and coke gasification. Considering the coke reactivity and the strength after reaction for blast furnace ironmaking process, the mixed distribution had better effect on coupling effect on coke gasification and iron ore reduction for practical application.
Recently, the improvement of coupling effect of iron ore reduction and coke gasification reactions have been concerned much in order to decrease reducing agent rate in blast furnace. High reactive coke could improve the reduction efficiency of iron ores in lump zone significantly, which has also been proved in our former study. Therefore, in this paper the influence of burden distribution (includes layered and mixed distributions) on coke gasification and iron ore reduction was laboratory investigated by using high reactive coke. The results showed that with the increase of layered number under the condition of layered distribution, the contact surface of iron ores and cokes are increased, which improves the reactions of coke gasification and iron ore reduction. Compared with layered distribution, mixed distribution had relatively low coke gasification and iron ore reduction at low temperature of 1173 K. When the reaction temperature increased to 1373 K, the direct reduction between iron ore and coke developed, which increased the coupling effect of iron ore reduction and coke gasification. Considering the coke reactivity and the strength after reaction for blast furnace ironmaking process, the mixed distribution had better effect on coupling effect on coke gasification and iron ore reduction for practical application.
Palavras-chave
Blast furnace; High reactivity coke; Burden distribution; Iron ore reduction.
Blast furnace; High reactivity coke; Burden distribution; Iron ore reduction.
Como citar
Zhang, Lihua;
Wu, Shengli;
Tuo, Biyang;
Wu, Jianlong;
Zhou, Yu;
Zhang., Zhekai.
INFLUENCE OF BURDEN DISTRIBUTION ON COUPING
EFFECT OF IRON ORE REDUCTION AND COKE
GASIFICATION IN BLAST FURNACE LUMP ZONE
,
p. 480-490.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22120
