Table 6. Optimal Separation Parameters for −6 + 3 mm Lignite and −3 + 1 mm Lignite.

lignite particle (mm)	inlet temperature °C	pulsating frequency (Hz)	bed height (mm)	air velocity (m/s)
–6 + 3	80	3.93	120	1.09
–3 + 1	100	3.49	80	0.55