Assertion: lignite | /r/CapableOf | use air
Facets:
value: as the separation medium
type: MANNER
Source sentences:
text: The material (dry brown coal or lignite), as indicated at TBK, leaving the high-speed drying device 12, is fed to an air or gas classifier 14 in which the material is graded or sized under the effect of forces due to gravity, using air or another gas as the separation medium.