ISO 589:2008 PDF
Hard coal — Determination of total moisture
Hard coal — Determination of total moisture
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 9
- Дата публикации:
- 28 октября 2008 г.
- Издание:
- ISO IS 589 edition 4 version 1
- ICS:
- 73.040
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.
Abstract
Overview
ISO 589:2008 - Hard coal - Determination of total moisture specifies laboratory procedures to determine total moisture in hard coals. The standard describes two main approaches: a two-stage (Method A) and a single-stage (Method B) moisture determination, each offering a choice of drying in air or drying in a nitrogen atmosphere. ISO 589:2008 establishes controlled drying temperatures, sample preparation and weighing requirements to produce comparable moisture results for coal quality assessment.
Key topics and technical requirements
- Methods covered
- Method A (two-stage): first-stage air drying at ambient to 30–40 °C, then residual moisture determination after crushing to 2.8 mm and drying at 105–110 °C.
- Method B (single-stage): crush to nominal top size (11.2 mm or 10 mm) and dry subsamples at 105–110 °C.
- Atmospheres
- Nitrogen-flushed ovens: recommended for all hard coals; nitrogen quality: oxygen
Технические детали
- Технический комитет
- ISO/TC 27/SC 5 - Methods of analysis
- SKU
- ISO 589:2008
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