The Dilatometer DF-4 used to determine the rate of swelling (increase in volume with heat) is an important indicator of the quality of coal for coking.
The expansion curves make it possible to deduce the numerical parameters of the tested coal samples:
The swelling rate of coal when heated is an important indicator of its quality for coking. In fact, it is determined by a standard dilatometric test. This test measures the expansion of coal samples as they are heated.
From the expansion curves the following numerical parameters of the tested coal samples can be deduced:
Fusion Points |
IT: Initial Deformation temperatureST: Softening/ Sphere temperatureHT: Hemi Sphere TemperatureFT: Fluid / Flow temperature |
Maximum number of samples per analysis |
6 samples |
Sample type |
Cube, Pyramid, Truncated Pyramid or cylinder |
Sample Shape Identification |
Automatic |
Furnace Specifications |
|
Furnace Temperature range |
Ambient to 1750°C |
Temperature ramp Rate |
Programmable from 1°C per minute to 12°C per minute |
Temperature Precision |
+/- 5°C as perStandard test method at 1064°C (by using 99.98% pure gold wire) |
Number of heating elements |
4 Heating elements |
Camera |
|
Camera Image Resolution |
1280x 1024 Pixel |
Image collection |
Up to 30 frames/min |
Gas Requirements |
|
Purge Air |
Nitrogen, 99.5% |
Reducing Mode |
CO-CO2 premixed gas (50-50 ratio) (or)H2-CO2 Premixed gas (50-50 ratio) (or)Capable to accept individual gases (Analyzer as inbuilt gas mixing facility for the required ratio) |
Oxidizing Mode |
Either by inbuilt moisture free air pump (or) by using with external Air compressor |
Electrical Requirement |
220 V to 240 V, 5/60 Hz, single phase, 18 A |
PF-12
DF-4
