what we've got is..6 May 2018 22:16
...tremendous - almost 100% perfect..
The following tests were undertaken:
� Concentrate Product Characterisation (LOI/Fixed carbon on concentrate and mesh fractions, bulk densities, Specific Surfaces Analysis (SSA), Thermogravimetric Analysis (TGA), Inductively Coupled Plasma ("ICP") analysis, and X-ray Diffraction ("XRD") analysis;
� Purification Processing (Acid purification, Alkaline purification, and ICP analysis on purified graphite); and
� Production of Expandable Graphite.
The following results were achieved:
� Results show that both acid and alkaline purification methods can produce a very clean concentrate of greater than 99.41% C(t).
� The alkaline method, using standard formulation, produced the highest grades, 99.82% C(t) for the -100-mesh concentrate, and 99.86% C(t) for the +100-mesh concentrate.
� Results obtained from acid purification reached 99.6% C(t) for the +100-mesh fraction.
� The alkaline and acid purification results indicate that, with some process optimisation, Aitolampi concentrates may meet the purity specification of 99.95% C(t) required for the lithium ion battery market.
� There is also a good market for the -100 mesh and greater than 95% C(t) concentrate.
� Carbon content in all fractions, including the fines, is very high and ranges from 96.25 to 97.61% C(t). The demand is significant for fine graphite with high carbon, across various applications.
� Aitolampi graphite shows high crystallinity, with the degree of graphitisation measuring approximately 98%, which is almost perfect crystallinity, and an important consideration for battery manufacturers seeking high energy density in cells.
� Volatiles are low which is an attractive product attribute, and often a pre-condition, in many applications, including refractories, lubricants, crucibles, and foundries.
� SSA is comparable to that of high quality flake graphite from China.
� Oxidation behaviour, tested with TGA analysis, is comparable with Chinese graphite of the same flake size, used for refractories, and other high temperature applications.
� ICP analysis, for elemental impurities in the alkaline purified concentrate, showed that impurities could be reduced to significantly lower levels by intensifying purification, optimising the amount of chemicals used, and process parameters, such as reaction time and temperature.