D197 (Sampling and Fineness Test of Pulverized Coal) - ScribdScope 1.1 This test method covers the determination of the ﬁneness by sieve analysis of coal sampled from a dry pulverizing operation. It is not applicable to products of wet milling or to ﬁnes that have clustered into an agglomerated mass. 1.2 The values stated in inch-pound units shall be regarded as the standard. Sample.finess من مطحنة الفحم,ASTM Coal Riffler - Innovative Combustion TechnologiesAir drying of sample is recommended if high moisture (>10%) coal is being fired or sieving is not performed immediately after sample extraction. This is to prevent the coagulation of sample on top of sieve screens which prevents particles to pass through screens and results in non- representative coal fineness. Coagulation.
finess من مطحنة الفحم