am buying syr at $1.67, page-37

Afterall, flotation is a very basic simple process using detergent and lots of water. It's that straight-forward a Chimpanzee could run the joint.
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If the graphite is highly weathered perhaps a "chimpanzee" could operate. If found in hard rock and has a number of "impurities, the "chimp" might need a little human assistance....................

"Depending on the degree of weathering of the ore rock, flake graphite is mined using standard hard or soft rock mining techniques. If the ore is hard-rock, it must be drilled and blasted. Highly weathered ore can literally be dug and hauled like sand to the floatation plant. The ore can be either quarried, open pit style, or shaft mined depending on the proximity of the ore body to the surface.

Processing of hard rock ore starts by trucking the ore to a crusher. Crushing must be done in order to release the flake from the enclosing country rock. Reduced ore is then feed to a mill where the ore is crushed further. Milling may be done in water slurry. At this point the individual flakes have been freed from the enclosing ore rock

The graphite/ore-rock slurry is then fed to froth floatation cells. Froth floatation is a method of beneficiation which relies on the differences between the surface chemistry of the country rock and the mineral being extracted, in this case graphite flake. In the cell the ore is mixed with water and "floatation agents". Mixing is followed by injection of air into the cell. As air bubbles float to the top of the cell the floatation agents, which coat the graphite flakes, are attracted and stick to the air bubbles

The buoyancy induced by the attached air bubble causes the individual flakes to float to the top of the bath where they are skimmed off. The floatation reagents do not stick to the country rock; therefore these particles sink to the bottom of the cell and are removed from the process. Floatation beneficiated flake may be re-floated to increase its purity. Subsequent to floatation the flake is washed, dried, and finally packaged for shipment"

http://www.asbury.com/Natural-Flake-Graphite.html