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Numerical Simulation of Coexisting Solid-liquid Slag Trickle Flow in a Coke Bed by the SPH Method with a Non-Newtonian Fluid Model

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Title: Numerical Simulation of Coexisting Solid-liquid Slag Trickle Flow in a Coke Bed by the SPH Method with a Non-Newtonian Fluid Model
Authors: Natsui, Shungo Browse this author →KAKEN DB
Sawada, Akinori Browse this author
Nogami, Hiroshi Browse this author
Kikuchi, Tatsuya Browse this author →KAKEN DB
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: ironmaking blast furnace
coke bed
trickle flow
molten slag
static holdup
Bingham plastic fluid
Issue Date: 15-Jul-2020
Publisher: 一般社団法人 日本鉄鋼協会 (The Iron and Steel Institute of Japan)
Journal Title: ISIJ international
Volume: 60
Issue: 7
Start Page: 1445
End Page: 1452
Publisher DOI: 10.2355/isijintemational.ISIJINT-2019-701
Abstract: A simulation of the dripping behavior of solid-phase suspended molten slag in a coke bed was performed using the Bingham fluid model in the framework of smoothed particle hydrodynamics (SPH). SPH can track the motion of droplets which are suspended in dispersed solids. A case study was performed in which the yield coefficient varied with the viscosity coefficient of the molten SiO2-CaO-Al2O3 slag, with suspended solids approximated by the Bingham fluid model, and the holdup droplets were trapped at approximately the same site regardless of the yield value. When the yield value exceeded the threshold, the volume of each holdup droplet increased. This threshold is correlated with the decrease in the shear rate at the bottleneck. Increasing the solid phase ratio in the molten slag is also predicted to increase the yield value with viscosity; thus, the amount of holdup droplets increases at the specific holdup sites as a dispersed phase. This indicates that the increase in the yield value approaches the powder holdup mechanism that is closed one after another starting from a specific holdup site.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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