Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/24613

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Title
Slug flow in a blast furnace taphole
Author/Creator
Stevenson, Paul;  He, Qinglin
Description
Excessive splashiness of a blast furnace taphole stream, which is caused by entrained blast air, can result in premature trough refractory wear. This splashiness has been found to occur when the gas-liquid flow regime of slug flow is present in the taphole tube. The taphole stream trajectories reported by He et al. [Q. He, P. Zulli, F. Tanzil, B. Lee, J. Dunning, G.M. Evans, Flow characteristics of a blast furnace taphole stream and its effects on trough refractory wear, ISIJ Int. 42 (2002) 235-242] can be predicted by the theory proposed herein that recognises that the average velocity in the liquid slug is equal to the sum of gas and liquid superficial velocities. The splashy flow observed by He et al. [Q. He, P. Zulli, F. Tanzil, B. Lee, J. Dunning, G.M. Evans, Flow characteristics of a blast furnace taphole stream and its effects on trough refractory wear, ISIJ Int. 42 (2002) 235-242] may be simply predicted by reference to a two-phase flow regime map. It is suggested that a splashy taphole stream will be avoided if the taphole points downwards or if the cast rate is above around 5 m s(-1).
Relation
Chemical Engineering and Processing Vol. 44, no. 10, p. 1094-1097
Date
2005
Publisher
Elsevier
Keyword(s)
taphole;  slug flow;  dispersed flow;  refractory wear;  blast furnace;  particles;  velocity;  pipes
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/24613
Identifier
ISSN:0255-2701
Language
eng
Reviewed
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Subject
"Chemical Engineering and Processing"
 
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