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Titolo:
Rheological properties of high-temperature melts of coal ashes and other silicates
Autore:
Vargas, S; Frandsen, FJ; Dam-Johansen, K;
Indirizzi:
Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, Denmark Tech Univ Denmark Lyngby Denmark DK-2800 m Engn, DK-2800 Lyngby, Denmark
Titolo Testata:
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
fascicolo: 3, volume: 27, anno: 2001,
pagine: 237 - 429
SICI:
0360-1285(2001)27:3<237:RPOHMO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEM DIOPSIDE-ANORTHITE; SHEAR VISCOSITY; CONFIGURATIONAL-ENTROPY; NMR-SPECTROSCOPY; LIQUID SILICATES; GLASS-TRANSITION; EMPIRICAL-METHOD; IGNEOUS ROCKS; MODEL; SLAGS;
Keywords:
silicates; viscosity; coal ash;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
171
Recensione:
Indirizzi per estratti:
Indirizzo: Vargas, S Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, Denmark Tech Univ Denmark Lyngby Denmark DK-2800 -2800 Lyngby, Denmark
Citazione:
S. Vargas et al., "Rheological properties of high-temperature melts of coal ashes and other silicates", PROG ENERG, 27(3), 2001, pp. 237-429

Abstract

This paper reviews the 20th century advances within the field of the measurement and the prediction of the rheological properties of high-temperature(T > 1000 K) silicate melts at atmospheric pressure with a focus on coal ashes and other melts of compositions relevant to coal ashes. Theoretical considerations are represented firstly by a synopsis of definitions and how-regimes and secondly by an outline of the ruling network theory and the notations used therein. The influence of different cations on viscosity is discussed thoroughly. Experimental points include a listing of the most common apparatus for viscosity measurements on high-temperature liquids and a summary of existing experimental data. Viscosity vs temperature is reported in tables as well asgraphically for melts composed of major amounts of one or more of the species: SiO2, Al2O3, FeOx, CaO, MgO, Na2O, K2O, Li2O, MnO, TiO2, B2O3. For each experimental source, relevant information is listed (apparatus, sensor material, atmosphere). With a basis in both theory and experimental data, general equations for liquids, are presented, relating viscosity to temperature and/or concentration of dispersed solids, as are more specific mathematical models, relating the viscosity of silica melts and glasses to temperature and composition. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 18/11/17 alle ore 03:47:24