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:
Softening Temperature
Temperature of maximum contraction
Temperature of maximum dilatation
Value of maximum contraction
Value of maximum dilatation
Highlights
Standard Features
High productivity of measurement
One measuring cycle = Four samples measured at once
Contact less measuring of measuring pistons movement (dilatation)
Fully automated performance
One measuring cycle lasts for approx. 120 minutes
Course of the test controlled by Computer
Real time monitoring of complete measuring process
Auto-diagnostics of the equipment
Measurement of temperature of each dilatation measuring tube
