Résumé

Specifies a method for determining the swelling properties of hard coal when heated under standard conditions in a dilatometer. In performing the method a pencil made of powdered coal formed under pressure is inserted into a precisely calibrated narrow tube and topped by a calibrated steel rod which slides in the bore of the tube. The whole is heated at a constant and definite rate. By making regular readings of the displacement of the rod as a function of the temperature and expressing the displacements observed as percentages of the original length of the penicl a curve is plotted.


Informations générales 

  • État actuel
     : Annulée
    Date de publication
     : 1975-01
  • Edition
     : 1
    Nombre de pages
     : 11
  • Comité technique
     : ISO/TC 27/SC 5 Méthodes d'analyse
  • ICS
     :
    73.040 Charbon

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  3. Catalogue de normes
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  6. ISO 349:1975