Microscopic examination of coals and carryover from wet and preheated carbonization

A blend of two Spanish coals was carbonized on a semi-industrial scale using wet and preheated charging. The wet and preheated coal blends were characterized by optical microscopy, and structural changes due to the preheating process i.e. development of porosity, fissuring, etc., were observed. Preh...

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Bibliographic Details
Published in:Fuel (Guildford) 1992-11, Vol.71 (11), p.1265-1270
Main Authors: Menéndez, R., Alvarez, R., Alvarez, D., Canga, C.S., Díez, M.A., González, A.I.
Format: Article
Language:English
Subjects:
Applied sciences
carbonization
Carbonization. Coking plant
Coal and derived products
Energy
Exact sciences and technology
Fuels
microscopy
preheating
Processing
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Summary:A blend of two Spanish coals was carbonized on a semi-industrial scale using wet and preheated charging. The wet and preheated coal blends were characterized by optical microscopy, and structural changes due to the preheating process i.e. development of porosity, fissuring, etc., were observed. Preheater fines and material carried over in the charging gases from the wet and preheated coal blend were characterized by proximate analysis and optical microscopy. Carryover material was characterized optically according to the ICCP char classification system. Preheating not only produced an increase in the amount of carryover but also modified its structural features. Preheating also resulted in an increase of anisotropic material in the carryover particles.
ISSN:0016-2361
1873-7153
DOI:10.1016/0016-2361(92)90052-P