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Proceedings of the Ironmaking, Iron Ore and Agglomeration Seminars

ISSN 2594-357X

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 — vol. 6, num.6 (2012)

Title

ANALYSIS OF THE COMBINED INJECTION OF PULVERIZED COAL AND CHARCOAL INTO LARGE BLAST FURNACES BY MULTIPHASE MODEL

ANALYSIS OF THE COMBINED INJECTION OF PULVERIZED COAL AND CHARCOAL INTO LARGE BLAST FURNACES BY MULTIPHASE MODEL

Authorship

Castro, Jose Adilson de; Guilherme, Vagner Silva; França, Alexandre Bôscaro; Sazaki, Yasushi; Yagi., Jun-ichiro

Castro, Jose Adilson de
Castro, Jose Adilson de

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Guilherme, Vagner Silva
Guilherme, Vagner Silva

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França, Alexandre Bôscaro
França, Alexandre Bôscaro

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Sazaki, Yasushi
Sazaki, Yasushi

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Yagi., Jun-ichiro
Yagi., Jun-ichiro

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DOI

10.5151/2594-357X-22098

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Abstract

The simultaneous injection of pulverized coal and charcoal in the blast furnace has recently received remarkable attention due to its potential to decrease the coke consumption and increase productivity. This paper is focused on modeling the simultaneous injection of pulverized coal and charcoal into the blast furnace through the tuyeres with oxygen enrichment. This model treats the blast furnace as a multiphase reactor and six phases are considered simultaneously, namely: gas, lump solids (lump iron ore, sinter, pellets, coke and small coke), hot metal, molten slag, pulverized coal and charcoal. Conservation equations of mass, momentum, energy and chemical species are solved simultaneously based on the finite volume method. The model is validated with a base case of actual operation using 215kg/thm of pulverized coal injection and afterwards mixed injection of coal and charcoal are simulated for injection rate of 250kg/thm. Model results indicated that the productivity of the blast furnace could be increased up to 28% with simultaneous injection combined with oxygen enrichment.

 

The simultaneous injection of pulverized coal and charcoal in the blast furnace has recently received remarkable attention due to its potential to decrease the coke consumption and increase productivity. This paper is focused on modeling the simultaneous injection of pulverized coal and charcoal into the blast furnace through the tuyeres with oxygen enrichment. This model treats the blast furnace as a multiphase reactor and six phases are considered simultaneously, namely: gas, lump solids (lump iron ore, sinter, pellets, coke and small coke), hot metal, molten slag, pulverized coal and charcoal. Conservation equations of mass, momentum, energy and chemical species are solved simultaneously based on the finite volume method. The model is validated with a base case of actual operation using 215kg/thm of pulverized coal injection and afterwards mixed injection of coal and charcoal are simulated for injection rate of 250kg/thm. Model results indicated that the productivity of the blast furnace could be increased up to 28% with simultaneous injection combined with oxygen enrichment.

Keywords

Pulverized charcoal; Modeling; Pulverized coal; Combined injection.

Pulverized charcoal; Modeling; Pulverized coal; Combined injection.

How to refer

Castro, Jose Adilson de; Guilherme, Vagner Silva; França, Alexandre Bôscaro; Sazaki, Yasushi; Yagi., Jun-ichiro. ANALYSIS OF THE COMBINED INJECTION OF PULVERIZED COAL AND CHARCOAL INTO LARGE BLAST FURNACES BY MULTIPHASE MODEL , p. 338-347. 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-22098