Minimum Ignition Temperature - MIT Dust Layer

Accumulation of dust on hot surfaces poses the risk of heating a material to the point
where it achieves a state of smoldering ignition. Such an event poses a serious fire
hazard. The surface ignition temperature of a dust is determined by applying ASTM
E2021 Standard Test Method for Hot-Surface Ignition Temperature of Dust Layers.
The test material is placed on a pre-heated surface, confined in 100 mm diameter,
12.7 mm high metal ring metal ring. The sample’s temperature and appearance are
monitored for signs ignition. The temperature of the hot plate is varied from test to test
in order to determine the lowest temperature at which the sample achieves ignition
criteria or exhibits signs of oxidation or decomposition.

Dust layer ignition testing is conducted on fine dry dusts. Test standards recommend
that the test be conducted on fine dusts, i.e., dust passing through a No. 200 sieve
screen (or a No. 230 sieve screen when testing in accordance to EN requirements).
If the moisture content is more than 5% then the sample is dried.

Sample size: 500 g