Table 8. Calculation Table of Distribution Rates for −6 + 3 mm Lignite.

	sink–float product						distribution rate
density (g/cm3)	mean density (g/cm3)	gangue (%)	middling (%)	fine coal (%)	raw coal (%)	fine coal and middling (%)	high-density separation (%)	low-density separation (%)
–1.30	1.25	1.08	4.87	26.21	32.16	31.08	3.36	15.67
1.30–1.40	1.35	1.15	5.80	12.76	19.71	18.56	5.83	31.25
1.40–1.50	1.45	0.55	3.89	1.82	6.26	5.71	8.79	68.13
1.50–1.60	1.55	0.40	2.04	0.45	2.89	2.49	13.84	81.93
1.60–1.80	1.65	1.27	0.78	0.16	2.21	0.94	57.47	82.98
1.80–2.00	1.90	3.90	1.23	0.10	5.23	1.33	74.57	92.48
+2.00	2.10	29.81	1.62	0.11	31.54	1.73	94.51	93.64
total		38.16	20.23	41.34	100.00