ISO/TC 27/SC 5/WG 1 - Moisture, volatile matter and ash
Humidité, substance volatile et cendres
General Information
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This document gives reference to ASTM D1412 as a method of determining the moisture-holding capacity of hard coals.
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ISO 11722:2013 specifies a method for determining the moisture in the general analysis test sample of hard coal by drying in nitrogen.
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ISO 579:2013 specifies a method for determining the total moisture of coke. It can be used for the determination of moisture of blast-furnace coke, foundry coke and other high-temperature carbonization products.
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ISO 687:2010 specifies a method for determining the moisture in the general analysis test sample of coke. ISO 687:2010 can be used for the determination of moisture in blast-furnace coke, foundry-coke and other high-temperature carbonization products.
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ISO 1171:2010 specifies a method for the determination of the ash of all solid mineral fuels.
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ISO 17246:2010 establishes a practice for the proximate analysis of coal and is intended for general utilization by the coal industry to provide a basis for comparison of coals.
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ISO 562:2010 specifies a method of determining the volatile matter of hard coal and of coke. It is not applicable to brown coals and lignites.
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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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ISO 1170:2013 gives equations that allow analytical data relating to coal and coke to be expressed on the various different bases in common use. Consideration is given to corrections that can be applied to certain determined values for coal prior to their calculation to other bases.
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ISO 1170:2008 gives equations that allow analytical data relating to coal and coke to be expressed on the various different bases in common use. Consideration is given to corrections that can be applied to certain determined values for coal prior to their calculation to other bases.
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ISO 17246:2005 establishes a practice for the proximate analysis of coal and is intended for general utilization by the coal industry to provide a basis for comparison of coals.
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ISO 687:2004 specifies a method for determining the moisture in the general analysis test sample of coke. ISO 687:2004 can be used for the determination of moisture in blast furnace coke, foundry-coke and other high-temperature carbonization products.
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ISO 589:2003 describes two methods for the determination of the total moisture content of hard coals. Depending on the coal rank, there may be systematic differences between the results obtained by applying different methods on subsamples of the same sample. Methods using a nitrogen atmosphere are suitable for all hard coals; methods with drying in air are only suitable for hard coals not susceptible to oxidation.
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The coal is brought to equilibrium with an atmosphere 96 % relative humidity at 30 °C and then dried to constant mass at 105 to 110 °C. The conditioning of the coal may be carried out either at atmospheric pressure or under reduced pressure. The moisture-holding capacity is reported as a percentage, by mass, of the conditioned moist coal.
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A known mass of the coke is heated in air at a temperature between 190 and 210 °C and maintained at this temperature until constant in mass. The percentage moisture content is calculated from the loss in mass of the coke.
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