Type of graphite:
The mineral graphite is an allotrope of carbon. Graphite is an
electrical conductor, a semimetal. Its formula is C and the occurs as Iron black to steel gray color or some
time is deep blue in transmitted light. Granite is very soft and its mosh hardness is just 1-2 with the density
is 2.09-2.23 t/m3
There are three principal types of natural graphite, each occurring in different types
of ore deposit:
Crystalline flake graphite (or flake graphite for short) occurs as
isolated, flat, plate-like particles with hexagonal edges if unbroken and when broken the edges can be irregular
or angular;
Aphanitic graphite occurs as fine particles is sometimes called meta-anthracite. Very fine
flake graphite is sometimes called amorphous in the trade;
Lump graphite (also called vein graphite)
occurs in fissure veins or fractures and appears as massive platy intergrowths of fibrous or acicular
crystalline aggregates, and is probably hydrothermal in origin.
The Solution for processing graphite ore:
Generally speaking, flotation is the
most popular way for graphite ore beneficiation, especially for flake graphite. Usually in order to protect the
big flake in graphite by repeated regrinding and floating (up to seven times) to purify the concentrate.
For Vein Graphite, it also takes the flotation method. Because there is no need to worrying about the big
flake, so there is no need to multistage grinding and flotation. There are always some amorphous
graphite(15%~25%) combined with vein graphite, so the floating time should be longer. This is also the reason
why vein graphite should be grinded to very fine size.
For amorphous graphite, as the grade of amorphous
graphite is usually very high, so after hand selecting the mineral gangue, the amorphous graphite grade can be
high enough as final product. Sometimes flotation method is also used for this kind graphite beneficiation. But
the recovery rate is quite low and the tailing is still useful for Low-quality casting graphite.
Common equipment
PEW Jaw Crusher, HP Cone Crusher, HST Cone Crusher, S series cone crusher,
vibrating screen
Ball
mill
Hydro cyclone, spiral classifier
SF Series Flotation Cells
BF Series Flotation
Cells
XCF-KYF Series Flotation Cells
