ISO 8264:1989 Preview

Hard coal -- Determination of the swelling properties using a dilatometer

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.


General information

  • Current status : Published
    Publication date : 1989-11
  • Edition : 1
    Number of pages : 9
  • :
    ISO/TC 27/SC 5
    Methods of analysis
  • 73.040
    Coals

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