2014
DOI: 10.2355/isijinternational.54.2533
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Reaction Behavior of Ca-loaded Highly Reactive Coke

Abstract: Usage of highly reactive coke in order to decrease the thermal reserve zone temperature in a blast furnace is considered promising to increase the reaction efficiency in the blast furnace and to decrease the reducing agent rate. In order to develop a new method to produce highly reactive coke by adding a Ca catalyst other than Ca-rich coal, in this paper, firstly the effects of Ca compounds pre-addition to coal on coke qualities were investigated. It was shown that carbonizing the mixture of coal and Ca compou… Show more

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Cited by 18 publications
(4 citation statements)
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“…TRZT can be lowered by charging of briquettes produced from in-plant fines as these contain iron oxide and carbon or by using Ferrocoke in which endothermic direct reduction of FeO with carbon will reduce the temperature [5]. Another option is charging of reactive [6][7][8][9][10] or activated coke that reacts readily with CO 2 producing CO according to the Boudouard reaction. Coke activated with slurries of magnetite and hydrated lime was charged as nut coke in the ferrous layers during operational trials in the LKAB EBF [6][7][8].…”
Section: Introductionmentioning
confidence: 99%
“…TRZT can be lowered by charging of briquettes produced from in-plant fines as these contain iron oxide and carbon or by using Ferrocoke in which endothermic direct reduction of FeO with carbon will reduce the temperature [5]. Another option is charging of reactive [6][7][8][9][10] or activated coke that reacts readily with CO 2 producing CO according to the Boudouard reaction. Coke activated with slurries of magnetite and hydrated lime was charged as nut coke in the ferrous layers during operational trials in the LKAB EBF [6][7][8].…”
Section: Introductionmentioning
confidence: 99%
“…Due to the close relationship between coke carbon and mineral matter, coke minerals could affect the strength and reactivity of coke in many ways such as the formation of cracks and weak spots in the coke matrix and the catalyzing reactions by catalytic mineral phases. The production and utilization of highly reactive catalyst-loaded coke to increase the reaction efficiency and decrease the reducing agent rate in the BF have been extensively reported. Additionally, the BF environment such as high temperatures and recirculating alkalis could also affect coke gasification. Therefore, it is crucial to gain a better understanding of the coke minerals and their interactions with the coke carbon matrix under BF conditions.…”
Section: Introductionmentioning
confidence: 99%
“…Nomura et al [17][18][19] studied gasification reaction and post-reaction strength of catalyst-loaded ferro-coke. In this paper, focused on ferro-coke, the thermogravimetry (TG) technique was applied to the measurement of the starting gasification temperature of coke and to the analysis of reaction kinetics, and the Tablets Coke Method was applied to the measurement of the reactivity and the post-reaction strength of coke.…”
Section: )mentioning
confidence: 99%