Stress Analysis of the Packed Bed in Blast Furnace

Katayama, Kenji; Wakabayashi, Satoru; Inada, Takanobu; Takatani, Kouji; Yamaoka, Hideyuki

doi:10.2355/tetsutohagane1955.83.2_91

Cited by 29 publications

(29 citation statements)

References 3 publications

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“…As for horizontal stress, it has a larger value at the peripheral part of belly and bosh, 7) and is supposed to have a significant effect on bridging which causes irregular descent and wearing of furnace wall. But, because any valid method for the quantitative estimation has not developed, the further discussion cannot be made and future research is expected.…”

Section: Effect Of Horizontal Stress On Operationmentioning

confidence: 99%

“…For the evaluation, the three mathematical simulators, that is 3-dimensional dynamic simulator for evaluating the conditions of working zone of blast furnace, 6) such as material flow, temperature distribution and so on, and Mechanical stress simulator of packed bed in furnace 7) were used and were interlinked to evaluate various aspects relevant to blast furnace performance. 8) In the evaluation, the blast furnace of inner furnace volume 3 000 m 3 was chosen to be a target, and the furnace profile conditions were set according to Table 1.…”

Section: Outlines Of Evaluation Process and Calculation Conditionsmentioning

confidence: 99%

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Effect of Blast Furnace Profile on Inner Furnace States

Inada¹,

Takata

Takatani³

et al. 2003

ISIJ International

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The effects of blast furnace profile on operation are investigated. The investigation is made by use of mathematical simulation models that are able to evaluate the operational conditions as follows: pressure drop, fuel rate and stability against channeling. The considerable number of furnace profiles are evaluated under the condition that inner volume, furnace height and hearth diameter have been given. In this investigation, geometrical parameters of furnace profile on furnace condition are clarified, and the better furnace profile for the furnace condition is shown.KEY WORDS: blast furnace; mathematical model; furnace profile; productivity; pressure drop; fuel rate; stress in packed bed; mass and heat transfer; fluid flow.

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Section: Effect Of Horizontal Stress On Operationmentioning

confidence: 99%

Section: Outlines Of Evaluation Process and Calculation Conditionsmentioning

confidence: 99%

Effect of Blast Furnace Profile on Inner Furnace States

Inada¹,

Takata

Takatani³

et al. 2003

ISIJ International

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“…Katayama et al 8) pointed out that the slip line analysis for the purpose of estimating the deadman profile is appropriate in the point that the lower shaft section is in the plastic condition but there remains a problem with respect to which should be assumed for the packed bed, in the active condition or in the passive condition. Consequently, the solid flow at the lower furnace section is assumed as follows and by checking the results with the actual furnace phenomena, the present assumption was verified.…”

Section: )mentioning

confidence: 99%

“…In the past, with respect to the deadman profile in the packed bed in the blast furnace, studies based on the cold model experiments, [2][3][4][5] slip-line analyses, [3][4][5][6][7] or in-furnace stress field analyses 8) with the dynamic burden descent condition taken into account have been made, and the theoretical characteristics of the stress field are now begun to be elucidated. However, there are few reports on the measurement of deadman profile and the analysis of actual furnace phenomena that cause the deadman profile to affect solid flow at the lower part of the furnace.…”

Section: Introductionmentioning

confidence: 99%

Analyses on Dynamic Solid Flow in Blast Furnace Lower Part by Deadman Shape and Raceway Depth Measurement

et al. 2005

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As one of the factors of frequent troubles that occur in the transition period from all-coke operation to PC injection operation in blast furnace as well as increased troubles in recent years, increased size of the blast furnace and high-productivity operation are pointed out. Consequently, great importance is attached to burden distribution control and burden descent condition, or control of melting zone, deadman shape, solid flow at the lower part of furnace and others. In the present study, the reduced stockline surface profile was measured by the reflection intensity of microwave struck from the furnace top after blow-off with stockline reduced, and investigation was made on the countermeasures for changes in the raceway depth and furnace body profile during operation. As a result, it has been clarified that flow-down of coke into the lower part of blast furnace and inflow into the raceway are greatly subject to the existence of deadman which is the packed structure of the lower part of furnace, and further, they are closely related to dynamic behavior of the raceway and affect changes of the furnace body profile.

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“…Regarding the stress distribution formed in the blast furnace, Shimizu analyzed the influence of the shaft angle on the stress field by a reduced-scaled model, 13) and Katayama proposed a theoretical model using elastic-plastic theory. 14) However, these studies are based on a continuum model derived from powder mechanics. In the present study, the macroscopic and microscopic behavior of the particle velocity and stress of each particle was analyzed by DEM in order to understand visually the burden descent.…”

Section: Introductionmentioning

confidence: 99%