A Mini Review on Flotation Techniques and Reagents Used in Graphite Beneficiation

Table 2

Specifications and uses of graphite [14].

End products	Percentage of graphite used	The quality of the graphite used
		Fixed carbon (F.C.) (%)	Size (micron)
Mag-carb refractories	12	87–90	150–710
Alumina-carb (graphitised) alumina refractories	8–10	85 min	150–500
Clay-bonded crucibles	60–65	∼80	149–841
Expanded (or flexible) graphite foils and products-based thereon (e.g., sealing gaskets in refineries, fuel pumps, and automobiles)	100	90 min. (Preferably + 99)	250–1800
Pencil	50–60	+95–98	50 max
Brake-linings	1–15	98 nub,	75 max
Foundry	—	40–70	53–75
Batteries
(a) Dry cells	—	88 min	75 max
(b) Alkaline	—	98 min	5–75
Brushes	—	Usually 99	Usually less than 53
Lubricants	—	98–99	53–106
Sintered products (e.g., clog wheels)	—	98-99	5
Paint	Up to 75	50–55; 75% nub	Amorphous powder flake
Braid used for sealing (e.g., on a ship)	40–50	95 min	—
Graphitized grease (used in seamless steel tube manufacturing)	—	+99	38 max
Colloidal graphite	100	99.9	Colloidal