Re: Suprised, no disccusion of Bob Greenfiels here...hoov
in response to
by
posted on
Jul 07, 2014 04:48PM
Hydrothermal Graphite Deposit Ammenable for Commercial Graphene Applications
I have to say I am really surprised at you Hoov, I thought you were above the common bashing. The full sample analysis detalis are in the 43-101 RE filed last year. Daa...
eg
Samples were analyzed for graphitic carbon using ALS protocol C-IR18. A 0.1 g sample was
leached with dilute hydrochloric acid to remove inorganic carbon (carbonate). After filtering,
washing and drying, the remaining sample residue was roasted at 425°C to remove any
organic carbon. The roasted residue was finally analyzed for graphitic carbon using a high
temperature LECO furnace with infra-red (IR) detection. Sulphur dioxide released from the
sample was also measured by IR detection and the total sulphur result was provided
following ALS protocol S-IR 08.
and
In early 2013, Zenyatta retained SGS Canada Inc. (SGS Lakefield) to test two
hydrometallurgical processing options to purify graphite from a flotation concentrate.
Lakefield tested a H2SO4 leach and a caustic baking process. Although both processes
successfully purified the concentrate to 99.9% carbon or better, Lakefield recommended that
the caustic baking process be pursued due to several issues with the H2SO4 leach including: high HF consumption, waste water production, and the requirement of two leaches to reach the high purity level.
The initial bench-scale tests demonstrated that the caustic baking process could produce
ultra-high purity graphite product with 99.97% carbon. The process was successfully applied
to a variety of graphite concentrate samples that had initial carbon grades between 46% and
90% using conventional flotation techniques. Different particle sizes were also tested. In all
trials, the final purity values were over 99.97% carbon and up to 99.99% carbon in many
cases, regardless of initial concentrate grades. The graphite purification process is effective
across a wide range of initial concentrate grades and particle sizes, producing ultra-high
purity graphite with good recoveries (Zenyatta News Release of April 25, 2013).In September 2013, Zenyatta shipped a 5,546.8 kg sample from the East Pipe to Lakefield.
The sample was composited from HQ size core from holes drilled specifically for the
testwork. A 4,623.4 kg sample from the West pipe was shipped in November 2013.
Testwork is scheduled to begin in January 2014 with results available in March 2014.
This is in RPAs report prepared for ZEN. I fail to see where any purification information is missing. I think this whole discussion is a load of BS...IMHO