Mr. Antonio Berlanga reports
HISTORIC LEACHOX TESTING SHOWS RECOVERIES UP TO 65% GOLD AND 81% SILVER POSSIBLE AT CAMPO MORADO
Telson Mining Corp. has released
results from historic Leachox process
testing for the possible
increase of gold and silver recoveries on the Campo Morado tailings
material in 2013 by Maelgwyn Mineral Services Ltd. of Cardiff, United Kingdom.
The testwork achieved a maximum gold dissolution of 65 per cent after 10 passes of Aachen oxidation at a grind specification of 80 per cent (20 microm).
The maximum silver dissolution of 75 per cent was achieved after
40 passes of
Aachen oxidation at a grind specification of 80 per cent (40 microm).
Reforma zone sample:
The testwork achieved a maximum gold dissolution of 45 per cent after 40 passes of Aachen oxidation at a grind specification of 80 per cent (20 microm).
The maximum silver dissolution of 81 per cent was achieved after
40 passes of
Aachen oxidation at a grind specification of 80 per cent (10 microm).
In Telson's continuing quest to maximize the returns from Campo Morado
production, the company has recently become aware of, having had discussions
with senior members of Maelgwyn Mineral Services, Maelgwyn's
conducted preliminary testing of samples from Campo Morado in 2013 for
Nystar, the project's former owner. The samples were from 2013 process
tailings, presumably the G9 zone, as well as fresh mineralization from the
Reforma deposit, a future production zone.
The Leachox testing indicated that substantial increases in precious
metal recoveries could be available at Campo Morado using Maelgwyn's
Leachox process. Very positive results were obtained in the 2013 testing
for both of the samples submitted, with a maximum recovery of 65 per cent gold
and 75 per cent silver at a grind size of 20 microns from the process tailings
sample and a maximum recovery of 45 per cent gold and 81 per cent silver at a grind size of
40 microns from the Reforma deposit sample. The report stated, "It
should be noted that the above testwork was performed at a scouting
level only and higher recoveries would probably be achieved with
"The Leachox precious metal recovery testing conducted by
Maelgwyn demonstrates that significant increases up to 65 per cent gold
and 81 per cent silver are possible at Campo Morado," commented Antonio Berlanga,
Telson's chief executive officer. "Should additional planned Leachox testing of optimization
work to confirm recoveries, ultimate best grind size and reagent
additions show a path forward to a commercial installation of this
technology, we could improve recoveries from current levels of gold at
15 to 20 per cent and silver 30 to 40 per cent, which would significantly increase the mine's
profitability by increasing the ounces of gold and silver produced at
About Maelgwyn Minerals' Leachox refractory
gold process (a patented technology process)
Maelgwyn Mineral Services holds a European patent for its
Leachox process for the treatment of refractory gold ores. Over the 10
years since first receiving a European patent, the Leachox process route
has become the industry leader in the low-cost recovery of gold from
refractory and sulphide orebodies. There is now worldwide installed
capacity of Leachox to recover over three million ounces per year of gold
contained in sulphides in such operations as: the Kibali mine in the
Democratic Republic of the Congo and the Tongon mine in Ivory Coast, both now owned by Barrick Gold
(formerly owned by Rangold Resources), the TGME mine in South Africa,
owned by Barberton Mines, and the Vasilkovskoye mine in Kazakhstan, owned
by Vasilkovsky MMC.
The Leachox process uses simple, ultrafine grinding equipment combined
with the Aachen Reactor, a proprietary, low-pressure, high-shear mass
transfer device utilizing oxygen to partially oxidize the sulphides.
When combined with the liberation of gold by the ultrafine grinding of
concentrates, it results in acceptable and, more importantly, economic
The Leachox process is a partial sulphide oxidation process for the
recovery of gold and silver from sulphide minerals. Depending upon the
mineralogy, a number of processes are used, but central to the Leachox
process is the Aachen shear reactor. In the leach process, it enhances
the kinetics and reduces reagent consumptions (oxygen, cyanide and lime)
that otherwise can be prohibitive. The reactor is designed to introduce
a high degree of shear, removing passivating films that may lead to
loss of recovery.
About Telson Mining Corp.
Telson is a Canadian-based mining company with two Mexican gold, silver and base metal mining projects. Effective May 15, 2018, Telson declared commercial production at its 100-per-cent-owned Campo Morado mine. Telson is currently producing zinc and lead concentrates with gold, silver and copper as byproducts.
Telson's 100-per-cent-owned Tahuehueto project, located in northwestern Durango state, Mexico, is currently in construction development.
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