Golden Predator Announces Successful Environmentally Friendly Gold Recovery Leach Tests
November 12 2019 - 8:00AM
Golden Predator Mining Corp. (TSX.V:GPY,
OTCQX:NTGSF) (the “
Company “or “
Golden
Predator”) is pleased to announce tests have successfully
confirmed that EnviroLeach Technologies Inc.’s (“EnviroLeach”)
(CSE: ETI) (OTCQB: EVLLF) (7N2: FSE) formula effectively extracts
and recovers more than 95% of the gold from sulfide concentrates
produced at the Company’s 3 Aces Project. The concentrate is
produced using Golden Predator’s Secondary Recovery Unit (SRU™).
With this environmentally friendly technology confirmed in
successive tests both in the EnviroLeach facility and at the Golden
Predator bulk sample processing plant (the “Plant”), the companies
have initiated a larger material test run to process up to 5 tonnes
of gold-bearing sulfide concentrates to be completed onsite at
Golden Predator’s Plant in Canada’s Yukon.
Janet Lee-Sheriff, Chief Executive Officer of
Golden Predator said “The Plant and SRU are examples of the
continuing ways that Golden Predator works to be innovative,
testing new methods that have the ability to change how we operate
at projects like 3 Aces. Working with EnviroLeach provides us a
unique opportunity to lead the way for safe and responsible new
cyanide-free extraction methods in processing gold bearing
concentrates which has immediate value on our 3 Aces Project as
well opening up other commercial opportunities.”
Summary of pilot test results:A
sample of gold-bearing sulfide concentrate recovered in 2018 was
shipped from the Plant to the EnviroLeach facility in Surrey, BC in
August of 2019:
- 55.9 kg of the material was processed using EnviroLeach
solution and 96.5% of contained gold was leached in 6 hours;
and
- Gold in solution was extracted by electrowinning and poured
into a 91.3 g button (bar).
A sample of gold-bearing sulfide concentrate
recovered in 2019 was also sent to and processed by EnviroLeach at
the Surrey facility:
- 30.4 kg of the material was processed using EnviroLeach
solution with 96.7% gold recovery in 29 hours; and
- Gold in solution was extracted by electrowinning in 4 hours and
poured into a 77.8 g button.
Following completion of test work in the
EnviroLeach facility in Surrey, on-site testing was initiated to
leach material at the Plant during the week of September 23rd,
2019. Results of this testing are reported below:
- 121 kg of gold-bearing sulfide concentrates produced during
2019 were processed in 21 hours with a 96.2% gold recovery;
and
- Electrowinning was completed in 14 hours and 255 g of gold was
recovered from the electrowinning cell and poured into a
button.
The Golden Predator-EnviroLeach working
relationship has enabled the companies to successfully demonstrate
the first ”in the field”, recovery of gold from gold-bearing
sulfide concentrates, using EnviroLeach’s environmentally friendly
formula and Golden Predator’s SRU™ processing equipment. An initial
5 tonne bulk test will be conducted in phases and completed at
Golden Predator’s bulk sampling plant in the Yukon with results
made available as they are received and evaluated.
Golden Predator operates the Plant to better
understand the metallurgy of the varying types of mineralized
rock at 3 Aces and to establish better and environmentally friendly
ways to process the mineralized rock. As part of its
processing plant, Golden Predator developed a mobile batch recovery
unit (“Secondary Recovery Unit” or “SRU™”) for the recovery of gold
from its sulfide concentrate. Golden Predator is utilizing
EnviroLeach’s proprietary environmentally friendly technology in
the SRU™. The Plant has now demonstrated the ability to
recover both coarse-grained gold from a closed system gravity
circuit and to extract gold from a sulfide concentrate in an
environmentally conscious manner.
About the EnviroLeach
Process
The EnviroLeach process delivers numerous
economic and environmental benefits over current extractive
technologies. The solution can effectively dissolve gold into
aqueous solution with similar leach kinetics and economics to that
of cyanide but is sustainable, safe and environmentally friendly.
This water-based process has a broad applicability spectrum and is
effective on most gold ores and concentrates. It can potentially
unlock the value of many deposits located in environmentally
sensitive areas that cannot be developed using current extraction
methods.
About the Golden Predator
Process
Golden Predator’s test processing plant, the
first of its kind in Yukon, Canada, commenced operations in 2016
providing increased metallurgical and geological understanding of
its 3 Aces Project. The Plant is a relatively simple gravity
circuit utilizing a closed-circuit water system with no added
chemicals due to the free-milling nature of 3 Aces’ gold. The
50 tonnes per day closed circuit plant recovers gold from #1
concentrates with doré bars sent to a commercial refinery for final
processing. Golden Predator is currently testing EnviroLeach’s
patent pending technology in its SRUTM for the extraction of gold
from its #2 concentrates. Total gold recovery from the
gravity circuit is over 85% of contained gold.
The 3 Aces Project is an orogenic gold project
in southeast Yukon which provides the testing material for the
Plant. To date, Golden Predator has focused exploration on a broad
gold-in-soil anomaly, where numerous orogenic gold-bearing quartz
veins have been discovered. Golden Predator made an early
decision to conduct a bulk sample at the 3 Aces Project when it
realized much of the gold contained in its veins is high grade
(commonly over 30 g/t gold) and nuggety. The best way to determine
the true gold value of a nuggety gold system is to conduct large
scale bulk sampling, which also allows Golden Predator the
opportunity to conduct bulk metallurgical and processing tests on
site.
QA/QC Statement
The initial laboratory, pilot scale and
production scale testing were successfully conducted at
EnviroLeach’s facility in Surrey, British Columbia prior to the
on-site testing at Golden Predator’s Plant. All tests were
conducted under the supervision of EnviroLeach and Golden Predator
personnel.
The technical content of this news release has
been reviewed and approved by Jeff Cary, CPG, a Qualified Person as
defined by National Instrument 43-101 and an employee of the
Company.
About Golden Predator Mining
Corp.
Golden Predator is advancing the fully licensed
Brewery Creek project towards production while exploration drilling
continues to expand resources. The Company also undertakes bulk
sampling and test recovery processes at its Yukon-based test
processing plant demonstrating gold recoveries of over 85%, without
the use of cyanide, from its 3 Aces Project. This green gold
provides for the mintage of .9999 gold coins from the Yukon Mint, a
wholly owned subsidiary of Golden Predator.
Contact Information: Janet Lee-Sheriff
Chief Executive Officer Golden Predator Mining Corp.(604)
260-5029info@goldenpredator.comwww.goldenpredator.com
Neither TSX Venture Exchange nor its Regulation Services
Provider (as that term is defined in policies of the TSX Venture
Exchange) accepts responsibility for the adequacy or accuracy of
this release. No stock exchange, securities commission or other
regulatory authority has approved or disapproved the information
contained herein. This press release contains forward-looking
information that involve various risks and uncertainties regarding
future events. Such forward-looking information can include without
limitation statements express or implied regarding completion of
the transactions described herein, the upcoming season at 3 Aces
project, and projected grades and gold and silver recoveries
from the 2018 and proposed 2019 bulk sample program, Actual results
and future events could differ materially from those anticipated in
such information. These and all subsequent written and oral
forward-looking information are based on estimates and opinions of
management on the dates they are made and are expressly qualified
in their entirety by this notice. Except as required by law, the
Company assumes no obligation to update forward-looking information
should circumstances or management's estimates or opinions
change.
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