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Permanent link (DOI): https://doi.org/10.7939/R3QP55

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Fragmentation of large coal particles at high temperature in a drop tube furnace Open Access

Descriptions

Other title
Subject/Keyword
Fragmentation
Drop tube furnace
Coal
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Tian, Su
Supervisor and department
Gupta, Rajender (Chemical and Materials Engineering)
Examining committee member and department
Xu, Zhenghe (Chemical and Materials Engineering)
Trivedi, Japan (Civil and Environmental Engineering)
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2011-09-28T04:35:00Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
The fragmentation of large coal particles at high temperature is important to the efficient operation of Corex process of steelmaking, which uses raw coal instead of coke. The hypothesis is that the heterogeneity within coal particles affects the fragmentation. The interface of minerals and coal matrix is likely to be the weak areas where fragmentation is most likely to occur. Heterogeneity in organic components might also impact the fragmentation behaviour. Advanced characterisation, such as Computer Controlled Scanning Electron Microscope (CCSEM), and petrographic analysis are applied to study the effects of coal properties on the fragmentation of large coal particles. A custom designed drop tube furnace is used to conduct drop tests at room temperature and at high temperature to assess the fragmentation behaviour of four coals at different experimental conditions. The coals with higher mineral-coal interface area resulted in higher fragmentation. The results agree well with the hypothesis. The effects of other parameters, such as feed size, temperature, and residence time are also studied.
Language
English
DOI
doi:10.7939/R3QP55
Rights
License granted by Su Tian (stian2@ualberta.ca) on 2011-09-26T21:18:42Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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