An experimental comparison of the ash formed from coals containing pyrite and siderite mineral in oxidizing and reducing conditions

Citation
Ar. Mclennan et al., An experimental comparison of the ash formed from coals containing pyrite and siderite mineral in oxidizing and reducing conditions, ENERG FUEL, 14(2), 2000, pp. 308-315
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environmental Engineering & Energy
Journal title
ENERGY & FUELS
ISSN journal
0887-0624 → ACNP
Volume
14
Issue
2
Year of publication
2000
Pages
308 - 315
Database
ISI
SICI code
0887-0624(200003/04)14:2<308:AECOTA>2.0.ZU;2-K
Abstract
Four coals containing iron mineral pyrite (FeS2) and siderite (FeCO3) were combusted in a laboratory drop tube furnace at temperatures of 1300, 1450, and 1600 degrees C under oxidizing and reducing conditions. Results for the behavior of pyrite mineral were in agreement with the established literatu re. The behavior of siderite mineral was determined and comparisons made. C oals containing pyrite minerals were determined to have potential to produc e ash deposition and slagging at lower temperatures than coals containing s iderite mineral. Reducing conditions were determined to lower the temperatu re at which ash deposition and slagging may occur for coals containing iron minerals compared to oxidizing conditions. With respect to ash deposition and slagging, it was determined that the iron levels in a coal are not defi nitive, but rather the iron mineral type (pyrite or siderite), mineral asso ciation (included or excluded), degree of association of included minerals, and the type of included alumine-silicate minerals have important roles.