Discrete particle simulation of gas-solid flow in a blast furnace

Zongyan Zhou, Haiping Zhu, Aibing Yu, Bryan D Wright, Paul Zulli

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Gas-solid flow plays a dominant role in the multiphase flow in an ironmaking blast furnace (BF), and has been modelled by different approaches. In the continuum-based approach, the prediction of the solid flow pattern remains difficult due to the existence of the stagnant zone in the BF lower central part. This difficulty has recently been shown to be overcome by discrete particle simulation (DPS). In this work, the DPS is extended to couple with computational fluid dynamics (CFD) to investigate the gas-solid flow within a BF. The results demonstrate that the DPS-CFD approach can generate the stagnant zone without global assumptions or arbitrary treatments. It confirms that increasing gas flow rate can increase the size of the stagnant zone, and in particular changes the solid flow pattern in the furnace shaft. More importantly, microscopic information about BF gas-solid flow, such as flow and force structures that are extremely difficult to obtain in continuum-approach or experiments, can be analyzed to develop better understanding of the effect of gas phase, and the underlying gas-solid flow mechanisms.
Original languageEnglish
Pages (from-to)1760 - 1772
Number of pages13
JournalComputers and Chemical Engineering
Volume32
Issue number8
DOIs
Publication statusPublished - 2008
Externally publishedYes

Cite this

Zhou, Zongyan ; Zhu, Haiping ; Yu, Aibing ; Wright, Bryan D ; Zulli, Paul. / Discrete particle simulation of gas-solid flow in a blast furnace. In: Computers and Chemical Engineering. 2008 ; Vol. 32, No. 8. pp. 1760 - 1772.
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Discrete particle simulation of gas-solid flow in a blast furnace. / Zhou, Zongyan; Zhu, Haiping; Yu, Aibing; Wright, Bryan D; Zulli, Paul.

In: Computers and Chemical Engineering, Vol. 32, No. 8, 2008, p. 1760 - 1772.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Wright, Bryan D

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AB - Gas-solid flow plays a dominant role in the multiphase flow in an ironmaking blast furnace (BF), and has been modelled by different approaches. In the continuum-based approach, the prediction of the solid flow pattern remains difficult due to the existence of the stagnant zone in the BF lower central part. This difficulty has recently been shown to be overcome by discrete particle simulation (DPS). In this work, the DPS is extended to couple with computational fluid dynamics (CFD) to investigate the gas-solid flow within a BF. The results demonstrate that the DPS-CFD approach can generate the stagnant zone without global assumptions or arbitrary treatments. It confirms that increasing gas flow rate can increase the size of the stagnant zone, and in particular changes the solid flow pattern in the furnace shaft. More importantly, microscopic information about BF gas-solid flow, such as flow and force structures that are extremely difficult to obtain in continuum-approach or experiments, can be analyzed to develop better understanding of the effect of gas phase, and the underlying gas-solid flow mechanisms.

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