Resumen
ISO 589:2008 describes two methods for determination of the total moisture content of hard coals, a two-stage method and a single-stage method. For either method there is a choice between drying in air and drying in a nitrogen atmosphere. Depending on the coal rank, there may be systematic differences between the results obtained by drying in the different atmospheres on subsamples of a sample. Drying in a nitrogen atmosphere is suitable for all hard coals, while drying in air is only suitable for hard coals not susceptible to oxidation.
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Informaciones generales
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Estado: PublicadoFecha de publicación: 2008-11Etapa: Norma Internacional confirmada [90.93]
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Edición: 4Número de páginas: 9
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Comité Técnico :ISO/TC 27/SC 5ICS :73.040
- RSS actualizaciones
Ciclo de vida
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Anteriormente
RetiradaISO 589:2003
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Ahora
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