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Avino Silver & Gold Mines Ltd. Financial News
Avino's San Gonzalo Vein Yields 93% Silver Recovery By Bulk Floatation
Avino Silver & Gold Mines Ltd. ("Avino" or the "Company") is
pleased to report that preliminary metallurgical testing on a composite
sample of San Gonzalo ore has been completed at SGS Minerals Services
("SGS"), Durango, Mexico. The results indicate the silver and gold
minerals will respond favourably to flotation with gold recoveries of
89 to 90% and silver recoveries of 92 to 93%.
The results are extremely encouraging and the most favourable test
conditions used in the lab are being used in developing the design and
configuring the plant process flowsheet that is currently underway. In
addition, the information derived from the lab work is also being used
to support of permitting applications that are also currently underway.
Samples used in preparing the metallurgical test composite consisted of
the assay rejects from the vein intercepts of diamond drill holes
SG-07-03, SG-07-13, SG-07-22, SG-07-24, SG-07-25 and SG-07-31. (See
Avino's website at www.avino.com for the location of these drill
holes). In total, there were 22 assay reject samples weighing
approximately 25kg that were used in preparing the overall test
composite.
Head assays of the overall test composite as reported by SGS are as follows:
Gold 1.86g/tonne
Silver 364g/tonne
Lead 0.27%
Zinc 0.65%
Copper 0.09%
Iron 3.67%
Sulfur 3.60%
A total of 5 flotation tests were performed. The first 3 tests were
performed at different grinds and the remaining two tests were done
using the best grind from the first set of tests and changing one of
the flotation chemicals.
No cleaning of the rougher/scavenger flotation was done pending
feedback from potential buyers of the silver rich flotation concentrate.
The grind series of tests showed a medium fine grind of 80% passing
150mesh provided the best results. Gold and silver recoveries were 89%
and 92% respectively. In addition the recoveries of lead zinc and
copper were 71%, 76% and 90% respectively. The grade of the combined
concentrate was 19.7g Au/t, 3967g Ag/t, 2.0% Pb, 5.4% Zn and 1% Cu. The
mass pull to concentrate was 8.7%.
Overall the test results demonstrate the kinetics of gold/silver
flotation is extremely fast with the bulk of the recoveries occurring
in the first 4 minutes of flotation time.
The ball mill work index obtained by SGS was 14.5kWh/ton ore. This
indicates the ore has medium hardness characteristics and does not
appear to be unusual.
David Wolfin, President of the Company states: "With the positive
results from the testing of San Gonzalo ore we are moving ahead with
the necessary permits to commence a 10,000 tonne bulk sample. While we
wait for the permits we have been assembling a 250 ton a day mill. A
majority of the equipment is already on site."
This news release was prepared by Jasman Yee, P. Eng., a qualified person under NI 43-101.
Founded in 1968, Avino has established a long record of mining and
exploration. The Company's focus is the acquisition and aggressive
exploration of top silver prospects throughout North America. Avino
remains well funded.
ON BEHALF OF THE BOARD
"David Wolfin"
David Wolfin, President
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