Addition of Carbonaceous Materials in Pellet Induration Process

Miyashita, Tsuneo; Sakamoto, Noboru; Fukuyo, Hiroshi

doi:10.2355/tetsutohagane1955.68.15_2238

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…As a result, these coarse pores of this type would become the origin for fracture. This was corresponding to a report by Miyashita et al,4) that the increase of coarse pores due to combustion and gasification, and decrease in the strength of the sintered pellets with increasing coke breeze ratio in the nucleus pellet appeared simultaneously.…”

Section: Influence Of Coke Breeze Positioning On Tensilesupporting

confidence: 90%

“…3) Several studies have examined the influence of the coke breeze positioning as on the granulation and combustion properties of pellets. For example, Miyashita et al 4) reported that the granulation property deteriorated and cracking became remarkable with increasing the amount of inner coke of pellets, whereas, in the pellets with a 2-layer structure, sinter strength was improved by increasing the content of coke in the surface layer. Sakamoto et al 5) reported that coating coke breeze on the green ball surface made it possible to secure an adequate supply of oxygen to coke, and thereby enabled efficient coke combustion.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Higuchi¹,

Iwami²,

Kuriki³

et al. 2013

ISIJ Int.

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The influence of coke breeze positioning on the sintering behavior of pellets and raw material bed with embedded pellets was investigated. With increasing the coke breeze ratio in the green pellet made from ore and coke mixture fine of -125 μm, the tensile strength of the green and dried pellets decreased.Based on the evaluations under the green and dried pellet equations concerning particle bond, it was presumed these results were caused by the decrease in the contact points between particles due to the reduction of mixture fine's specific surface area.With increasing the coke breeze ratio in the nucleus pellet, the tensile strength of the burned pellets also decreased. From the change in the porosity up to 900°C, sintering was predominant to the tensile strength. In the temperature from 900°C to 1 200°C, the increase of strength became small by adding coke breeze in the nucleus pellet. It was presumed this result was caused by remarkable increase of void after coke combustion.In the sintering of raw material bed with embedded the coke breeze coating pellet, the surrounding temperature of pellet increased and the large void was generated below the pellet. Based on the 2-dimensional numeric evaluation, it was found the heat amounts of the pellet and gas heated by coke combustion were transported to the region under the pellet where the gas flow rate was low. It was considered this heat concentration caused the remarkable melting and large void formation.

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Section: Influence Of Coke Breeze Positioning On Tensilesupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Higuchi¹,

Iwami²,

Kuriki³

et al. 2013

ISIJ Int.

View full text Add to dashboard Cite

show abstract

Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Higuchi¹,

Iwami²,

Kuriki³

et al. 2012

Tetsu-to-Hagane

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緒言近年，鉄鉱石資源は，AlWith increasing the coke breeze ratio in the green pellet made from ore and coke mixture fine of -125μm, the tensile strength of the green and dried pellets decreased. Based on the evaluations under the green and dried pellet equations concerning particle bond, it was presumed these results were caused by the decrease in the contact points between particles due to the reduction of mixture fine's specific surface area. With increasing the coke breeze ratio in the nucleus pellet, the tensile strength of the fired pellets also decreased. From the change in the porosity up to 900°C, sintering was predominant to the tensile strength. In the temperature from 900°C to 1200°C, the increase of strength became small by adding coke breeze in the nucleus pellet. It was presumed this result was caused by remarkable increase of void after coke combustion.In the sintering of raw material bed with embedded the coke breeze coating pellet, the surrounding temperature of pellet increased and the large void was generated under the pellet. Based on the 2-dimensional numeric evaluation, it was found the heat amounts of the pellet and gas heated by coke combustion were transported to the area under the pellet where the gas flow rate was low. It was presumed this heat concentration caused the remarkable melting and large void formation.

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Formation of Partially Reduced Iron by Heating Iron Ore-coal Char Composite Pellet in Oxygen Bearing Gas Flow: Reactions, Swelling Rate and Crushing Strength

Iguchi

Kamei

1999

Tetsu-to-Hagane

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Addition of Carbonaceous Materials in Pellet Induration Process

Cited by 4 publications

References 7 publications

Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Influence of Coke Breeze Positioning on the Sintering Behavior of Pellets and Raw Material Bed with Embedded Pellets

Formation of Partially Reduced Iron by Heating Iron Ore-coal Char Composite Pellet in Oxygen Bearing Gas Flow: Reactions, Swelling Rate and Crushing Strength

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