Hard coal — Determination of the swelling properties using a dilatometer
NORM herausgegeben am 23.11.1989
Bezeichnung normen: ISO 8264:1989
Ausgabedatum normen: 23.11.1989
Zahl der Seiten: 9
Gewicht ca.: 27 g (0.06 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: 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.