Experiments with fly ash obtained from a coal-burning power station in NSW, Australia, were conducted in the cold crucible facility at ANSTO using a 30kW variable frequency generator. The generator was configured as a standard Hartley oscillator with the tank capacitor able to vary from 110 pF to 4100 pF giving a frequency span of 5MHz to 18MHz. The applicator consisted of a coil with a water cooled base and top plate that formed an LC resonant cavity, which coupled to the RF generator by a single turn coil. A dark glass, confined inside the applicator, was formed by applying a high frequency electromagnetic field between two copper plates through a sample of fly ash. The temperatures reached were in excess of 1000 °C causing the powder to fuse into glass in a very brief period of a few minutes. The purpose of this experiment was to verify if dielectric and/or induction heating could melt the fly ash in a more rapid manner than conventional (resistive/joule) heating.

Processing fly ash from coal burning power station in a variable radiofrequency field / Barbieri, L.; Lancellotti, I.; Andreola, F.; Cotradi, A.; Leonelli, C.; La Robina, M.. - 207:(2009), pp. 21-28. ((Intervento presentato al convegno 2008 Materials Science and Technology Conference, MS and T'08 tenutosi a Pittsburgh, PA, USA nel 5-9 ottobre 2008 [10.1002/9780470538371.ch3].

Processing fly ash from coal burning power station in a variable radiofrequency field

Barbieri L.;Lancellotti I.;Andreola F.;Leonelli C.
;
2009

Abstract

Experiments with fly ash obtained from a coal-burning power station in NSW, Australia, were conducted in the cold crucible facility at ANSTO using a 30kW variable frequency generator. The generator was configured as a standard Hartley oscillator with the tank capacitor able to vary from 110 pF to 4100 pF giving a frequency span of 5MHz to 18MHz. The applicator consisted of a coil with a water cooled base and top plate that formed an LC resonant cavity, which coupled to the RF generator by a single turn coil. A dark glass, confined inside the applicator, was formed by applying a high frequency electromagnetic field between two copper plates through a sample of fly ash. The temperatures reached were in excess of 1000 °C causing the powder to fuse into glass in a very brief period of a few minutes. The purpose of this experiment was to verify if dielectric and/or induction heating could melt the fly ash in a more rapid manner than conventional (resistive/joule) heating.
2008 Materials Science and Technology Conference, MS and T'08
Pittsburgh, PA, USA
5-9 ottobre 2008
207
21
28
Barbieri, L.; Lancellotti, I.; Andreola, F.; Cotradi, A.; Leonelli, C.; La Robina, M.
Processing fly ash from coal burning power station in a variable radiofrequency field / Barbieri, L.; Lancellotti, I.; Andreola, F.; Cotradi, A.; Leonelli, C.; La Robina, M.. - 207:(2009), pp. 21-28. ((Intervento presentato al convegno 2008 Materials Science and Technology Conference, MS and T'08 tenutosi a Pittsburgh, PA, USA nel 5-9 ottobre 2008 [10.1002/9780470538371.ch3].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1208243
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