A test piece, in the form of a pencil, prepared from powdered coal is heated at a constant rate in a steel retort positioned in a furnace, the temperature monitoring system having been previously calibrated using two reference metals of known melting points. The change in level of a piton resting upon the test piece is observed continuously, and record is produced which is characteristic of the swelling properties of the coal.
État actuel: PubliéeDate de publication: 1989-11
Edition: 1Nombre de pages: 9
Comité technique: ISO/TC 27/SC 5 Méthodes d'analyse
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|std 1 61|
|std 2 61||Papier|