Table 3.

Information of the largest mine in top 5 countries of coal production.

Rank	Country	Mine	Production [MTPA]	Reserves [BT]	Coal type	Impurities	Mining methods	Coal cleaning methods	References
1	China	Haerwusu coal mine	20.00	1.70	Lignite	anatase, bauxite boehmite, calcite clausthalite, kaolinite, lithium, pyrite, and zircon	open pit	dense medium separation	[[71], [72], [73], [74], [75]]
2	USA	North Antelope Rochelle mine	59.97	1.90	Subbituminous	anhydrite, bentonite, gypsum, and uranium	open pit	–	[76]
3	India	Jharia coalfield	0.34	19.40	Bituminous	amphibole, apatite, diopside, K-feldspar olivine, and phlogopite	open pit and underground	flotation	[[77], [78], [79]]
4	Australia	Peak Downs coal mine	11.80	0.72	Bituminous	copper, pyrite, and zinc	open pit	dense medium separation, spirals, and flotation	[80,81]
5	Indonesia	Sangatta mine	51.72	0.92	Lignite	illite, illite-montmorilonite, kaolinite, melanterite, quartz, and siderite	open pit	dense medium separation	[82,83]