Swelling rate (increase in volume when heated) is an important indicator of the quality of coal for coking. It is determined by a standard dilatometric test.
From the expansion curves the following numerical parameters of the tested coal samples can be deduced:
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Working range of sample heating
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200 deg.C (selectable)
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Setting of temperature alarm
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500 - 600°C
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Accuracy of temperature control
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± 1 °C / 10 min
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Measurement of pistons' shifts
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Contactless
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Manipulation with measuring tube
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Fully automated
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Temperature gradient
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3 °C /min
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Duration of one measuring cycle
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120 min (for up to 7 samples in parallel)
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Dilatation measurement range
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50 to + 400 % (standard samples)
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Power supply
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230 V, 50 Hz
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Dimensions
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700 x 250 x 900 mm (with tubes up 1450 mm)
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