African Gold Group, Inc. (TSX-V: AGG) (“
AGG” or
the “
Company”) is pleased to announce updated test
results from metallurgical testing on sulphide material from its
flagship Kobada Project, in southern Mali. The results continue to
advance the opportunity of increasing reserves without further
drilling, by demonstrating sulphides can be processed through the
oxide plant as designed in the feasibility study, thus generating a
more robust mine plan with larger tonnage and increased gold
output.
Highlights from the metallurgical
testing include:
- Comminution tests indicate
a Bond Work Index (BBWi) of 13,5 Kwh/t with medium hardness
sulphide and abrasiveness (Ai) of 0.2487
- Cyanide consumption at 0.75
kg/t is a low-medium cyanide consumer and fits into current DFS
plant design
- Lime requirement of 0.38
kg/t indicate a very low lime consumption, meaning that operating
costs for treating sulphides are expected to be low
Danny Callow, CEO, African Gold Group
states:
“The ongoing results from a comprehensive
sulphide metallurgical testing campaign continue to give us great
confidence in the amenability of the Kobada sulphides to be treated
easily through our existing Gravity and CIL process with very good
recoveries. In addition, there appears to be no requirements for
any change to the gravity and CIL process circuit to accommodate
the sulphides. Work is underway to optimise the grinding
requirement of the sulphides versus oxides, and these results are
due out soon. This is the best we could have hoped for in terms of
optimising the sulphide testwork, and this means that the process
plant design already completed to an advanced detailed engineering
level can accommodate the sulphides.”
“We are confident that we have a substantial
sulphide resource below the oxides, and the results of this
testwork will enable us to quickly convert a portion of the
existing measured and indicated sulphide resources into reserves.
Apart from a huge oxide upside opportunity, the addition of
sulphides treatable through our existing plant design adds more
value to the size of the Kobada project.”
The comprehensive metallurgical testing program
was conducted by Maelgwyn South Africa (MSA) on composite samples
from all defined mineral zones (north, south, and central domains)
of the main shear zone.
The ongoing sulphide ore testwork program
involved the following:
- Optimised cyanidation testwork
- Additional comminution studies to
determine optimal grind size and abrasiveness of the ore
Optimised cyanidation
testwork
Cyanidation testwork indicates a low to medium
cyanide consumption required for high gold dissolution rate. Other
projects in the region typically consume between 0.85 – 1.38 kg/t,
so this is considered a low cyanide consuming ore.
Test No. |
Cyanide Consumption kg/t |
Lime Consumption (kg/t) |
Gold Dissolution (%) |
1 |
0.09 |
0.40 |
57.1% |
2 |
0.27 |
0.40 |
59.1% |
3 |
0.40 |
0.39 |
71.7% |
4 |
0.55 |
0.39 |
76.1% |
5 |
0.75 |
0.38 |
93.4% |
6 |
1.44 |
0.36 |
93.9% |
Results from comminution
testing
- Bond Ball Work Index (“BBWi”) -
13.5 kWh/t
- Bond Abrasion Index (“Ai”) -
0.2847
Property |
Soft |
Medium |
Hard |
Very Hard |
BBWi |
7-9 |
9-14 |
14-20 |
>20 |
Ai |
0.05 |
0.30 |
0.80 |
|
Based on these results the sulphide ore at the
Kobada Project is classified as medium hardness and medium-soft
abrasiveness.
Effect of Grind
Gold dissolution tests were conducted on gravity
middlings and tails by varying grinds 75 to 212 µm as
shown in the table below. It can be noted that dissolution of
gravity middlings and tails reduced with an increase in grind size
- results are in line with expectations.
GrindP80 (µm) |
FeedGrade(g/t) |
Gravity TailsRecovery(%) |
Gravity ConcDissolution(%) |
Gravity TailsDissolution(%) |
CombinedDissolution(%) |
Cyanide(kg/t) |
Lime(kg/t) |
212 |
0.54 |
41.46% |
96.37% |
50.65% |
70.37% |
1.20 |
0.22 |
150 |
0.54 |
41.46% |
96.37% |
66.52% |
79.90% |
1.18 |
0.21 |
106 |
0.54 |
41.46% |
96.37% |
89.14% |
93.48% |
1.44 |
0.2 |
75 |
0.54 |
41.46% |
96.37% |
93.55% |
96.13% |
2.38 |
0.24 |
Further optimisation work from OMC will
determine any possible changes to mill design to support finer
grinding, however the rest of the process plant design can
accommodate the sulphides without any further design changes. In
addition, additional variability testing will take place over the
next few weeks.
Corporate Update
The company would like to announce some
structural corporate changes to its senior management team and
office services agreement.
The Company would like to welcome Paul Bozoki to
the team as Chief Financial Officer. Mr. Bozoki is a seasoned dual
Canadian and U.S. CPA with over 25 years of accounting, tax and
corporate finance experience, mainly in the mining industry. Mr.
Bozoki replaces Ryan Ptolemy, the former Chief Financial Officer of
the Company.
Additionally, the Company would like to announce
that it has agreed to part ways with Kenny Choi, the former
Corporate Secretary of the Company and Dr. Andreas Rompel, the
former Vice President Exploration. Mr. Ptolemy, Dr. Rompel and Mr.
Choi will remain available to ensure a smooth transition. The
Company’s Board of Directors and management would like to express
their gratitude to Mr. Ptolemy, Dr. Rompel and Mr. Choi for their
invaluable contributions since joining AGG in 2018 and wishes each
of them all the best in their future endeavours.
The Company also announces that it has
terminated its services agreement at 65 Queen Street West and
relocated its registered head office to 100 King St W #1600,
Toronto, ON M5X 1G5.
Option Grant
The Company has granted a total of 2,800,000
stock options to certain officers, directors and consultants of the
Company pursuant to the Company’s stock option plan. The stock
options vest immediately and may be exercised at a price of $0.115
per option for a period of five years from the date of grant. This
grant of options is subject to the approval of the TSX Venture
Exchange.
About African Gold Group
African Gold Group is a TSX Venture Exchange
(TSX-V: AGG) listed exploration and development company with a
focus on building Africa’s next mid-tier gold producer. The Company
has a highly experienced board and management team with a proven
track record in the African mining sector operating mines from
development through to production. AGG’s principal asset is the
Kobada Project in southern Mali, which is in an advanced stage of
development having completed the 2020 definitive feasibility study
and is targeting gold production of 100,000 oz per annum. As well
as the initial Kobada Gold Project, other exploration locations
have been identified on the Kobada, Farada and Kobada Est
concessions, offering potential for an increase in resource. For
more information regarding African Gold Group visit our website at
www.africangoldgroup.com.
For more information:
Danny Callow President and Chief Executive Officer+(27) 76 411
3803 Danny.Callow@africangoldgroup.com
Scott EldridgeNon-Executive Chairman of the Board(604)
722-5381Scott.Eldridge@africangoldgroup.com
Daniyal Baizak VP Corporate Development (647)
835-9617Daniyal.Baizak@africangoldgroup.com
Camarco (Financial PR)Gordon Poole Nick Hennis +44 (0) 20 3757
4997 AfricanGoldGroup@camarco.co.uk
Cautionary statements
This press release contains “forward-looking
information” within the meaning of applicable Canadian securities
legislation. Forward-looking information includes, but is not
limited to, statements regarding, processing of sulphide materials,
appointment of officers and the grant of incentive stock options.
Generally, forward-looking information can be identified by the use
of forward-looking terminology such as “plans”, “expects” or “does
not expect”, “is expected”, “budget”, “scheduled”, “estimates”,
“forecasts”, “intends”, “anticipates” or “does not anticipate”, or
“believes”, or variations of such words and phrases or statements
that certain actions, events or results “may”, “could”, “would”,
“might” or “will be taken”, “occur” or “be achieved”.
Forward-looking information is subject to known and unknown risks,
uncertainties and other factors that may cause the actual results,
level of activity, performance or achievements of AGG to be
materially different from those expressed or implied by such
forward-looking information, including but not limited to: receipt
of necessary approvals; general business, economic, competitive,
political and social uncertainties; future prices of mineral
prices; accidents, labour disputes and shortages and other risks of
the mining industry. Although AGG has attempted to identify
important factors that could cause actual results to differ
materially from those contained in forward-looking information,
there may be other factors that cause results not to be as
anticipated, estimated or intended. There can be no assurance that
such information will prove to be accurate, as actual results and
future events could differ materially from those anticipated in
such statements. Accordingly, readers should not place undue
reliance on forward-looking information. AGG does not undertake to
update any forward-looking information, except in accordance with
applicable securities laws.
NEITHER TSX VENTURE EXCHANGE NOR ITS
REGULATION SERVICES PROVIDER (AS THAT TERM IS DEFINED IN THE
POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR
THE ADEQUACY OR ACCURACY OF THIS RELEASE.
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