TSXV: PGZ | OTCQX: PGZFF
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- Copper metallurgy tests confirm saleable concentrate grades
are achievable across the deposit through a simple
conventional flotation process flowsheet
- Excellent recoveries up to 88% copper
- Concentrate grades up to 32.5% copper, with payable silver
content and low deleterious elements
- Positive results advance La Romana to the preliminary design
phase of the metallurgical process
VANCOUVER, BC, March 21,
2024 /CNW/ - Pan Global Resources Inc. ("Pan
Global" or the "Company") (TSXV: PGZ) (OTCQB: PGZFF) (FSE: 2EU) is
pleased to announce successful results for a froth flotation
variability test program for copper ("Cu") recoveries at the
Company's flagship La Romana copper-tin-silver deposit in the
Escacena Project, southern Spain.
Metallurgy tests for tin recovery are also underway and will be
reported when available.
"The new copper metallurgy test results for the La Romana
deposit are further confirmation that simple conventional froth
flotation can produce a high-value, high-quality, and clean copper
concentrate at potentially lower cost than the average within the
pyrite belt. These characteristics are highly desirable for
smelters and potentially attractive for blending with lesser
quality concentrates to increase the value and reduce penalty
costs. The results are an important project development step to
determine optimum process economics, metal recoveries, cash flow
projections, and economic studies," said Tim Moody, Pan Global's President & CEO.
The metallurgical test program is being conducted by Wardell
Armstrong International (United
Kingdom), under the coordination and management of Minepro
Solutions SL (Spain).
Minepro Solutions SL reported on March
19, 2024: "As compared to the average of deposits within the
Pyrite Belt, the La Romana mineral deposit has demonstrated lower
energy requirements for both crushing and grinding, coarser
liberation sizes, as well as superior performance in the flotation
process for copper. This includes higher concentrate grades and
improved recoveries using conventional circuits and chemical
agents, which indicates an anticipation of moderate operating costs
related to the process."
Key test results
- A simple conventional flotation flowsheet can achieve saleable
concentrate grades and good recoveries for La Romana copper
mineralization.
- A series of open circuit rougher and cleaner flotation tests
were performed on composites from 10 blocks distributed across the
deposit (see Figure 1 below) and compared to a reference sample
from previous test work:
- Head grades ranged from 0.33% Cu to 0.54% Cu (average 0.40%
Cu)
- Flotation tests for seven of the blocks (blocks 1-5, 8 and 10)
established attractive concentrate grades ranging from 26.8% to
32.5% Cu (average 29.1% Cu) and overall recoveries from
73.5% to 88.3% Cu (average 81.4% Cu)
- Additional tests with finer regrinding indicate target
concentrate grades and good recoveries for the other three blocks
(blocks 6, 7 and 9)
- Where concentrates exceeded 30% Cu, the number of cleaning
cycles were reduced from 3 to 2, simplifying and improving copper
recovery
- Results indicate copper concentrate grades and recoveries
increase with higher head grades
- Locked Cycle Tests (LCT) conducted on four of the 10 blocks
resulted in Cu recoveries to concentrates ranging from 72% to 88.7%
Cu and concentrate grades of 22.7% to 30.6% Cu. These compare
closely to the 83.54% recovery and concentrate grade of 28.54% Cu
for the reference sample used as the baseline for comparison.
- Multi-element analyses on the final concentrates from the four
LCT confirmed low concentrations of deleterious elements (As, Sb,
Bi, Hg, Cl, and F) and the potential for a silver credit with
grades from 88 to 102g/t Ag, contributing to a higher Net Smelter
Return potential.
- Tests to determine energy required for milling ore returned
Bond Ball Mill Work Index (BBMWi) results ranging from 12.23 to
16.97 kWh/t (average 14.99 kWh/t). The average energy requirement
is a slight improvement on the reference sample (15.48 kWh/t), and
is classified as medium to hard.
- Additional optimization of the flotation processing and costing
will be undertaken to enhance potential economics.
Variability Test Program
The primary objective of the La Romana metallurgical test
program is to determine the optimal mineral processing flowsheet
and treatment plant design to produce marketable copper and tin
concentrates.
The metallurgical variability study and new BBMWi tests were
carried out using drill core sample composites selected from 10
blocks distributed throughout the La Romana deposit, and at
different depths to help simulate different mining extraction
phases. Applying the same test conditions, the results for all the
blocks were compared with a reference sample ("REF") from previous
successful metallurgical test work reported on April 11, 2023.
The processing flowsheet for the variability tests replicated
the flowsheet and chemical reagents used for the reference sample.
Specifically:
- Each composite consisted of a minimum 30 kg of material from
selected drill core
- Initial crush to reduce the material to 1mm for head grade
assay and comminution tests, including ball milling amenability and
net power requirements
- Primary grind size of 106 microns, followed by a copper rougher
flotation stage to maximize recovery of the copper minerals to a
concentrate at a coarse particle size
- Regrinding of the rougher concentrate down to 20 or 15 microns,
contingent upon the cleaner performance
- Further extraction and upgrading of the copper concentrates
through a series of two to three cleaner flotation stages
- Locked Cycle Tests on 4 of the 10 blocks
- Recoveries calculated from correlating locked cycle tests
results with open circuit flotation results
Approximately 50 additional drill holes were completed at La
Romana after the samples for the variability test program were
selected in May 2023, and the copper
deposit has been extended to the west at surface by 400 meters and
remains open for further expansion. Consideration will be given to
extending the metallurgical test work to the western extension of
La Romana.
Tin metallurgy results are expected to be reported shortly, and
results are pending for additional drill holes at the Cañada Honda
discovery. Additional drilling is planned at both La Romana and
Cañada Honda as part of the 2024 drilling program.
Table 1 – Summary Locked Cycle Test results and reference
sample (REF)
|
Head
Grade
|
Concentrate
Grade
|
Recovery
|
BLOCK
|
Cu %
|
Cu %
|
Cu %
|
REF
|
0.39
|
28.54
|
86.40
|
2
|
0.37
|
30.60
|
87.61
|
5
|
0.38
|
22.71
|
78.23
|
6
|
0.34
|
25.45
|
71.98
|
10
|
0.37
|
23.86
|
88.68
|
Table 2 – Head grades, Open Circuit concentrate
grades and recoveries
Block
|
Cycles
|
Head
Grade
|
Grind
|
Regrind
|
Open
Circuit
|
Interpolated
LCT
|
Cu %
|
µm
|
µm
|
Cu %
|
Cu %
Recovery
|
REF
|
1 Ro + 3 Cl
|
0.39
|
106
|
20
|
30.18
|
86.15
|
B.1
|
1 Ro + 2 Cl
|
0.33
|
106
|
20
|
32.49
|
76.40
|
B.2
|
1 Ro + 2 Cl
|
0.37
|
106
|
20
|
31.17
|
88.83
|
B.3
|
1 Ro + 2 Cl
|
0.54
|
106
|
20
|
30.56
|
66.62
|
B.4
|
1 Ro + 3 Cl
|
0.47
|
106
|
20
|
28.55
|
84.43
|
B.5
|
1 Ro + 3 Cl
|
0.38
|
106
|
20
|
20.64
|
88.18
|
B.6
|
1 Ro + 3 Cl
|
0.34
|
106
|
15
|
21.51
|
74.34
|
B.7
|
1 Ro + 3 Cl
|
0.35
|
106
|
20
|
17.03
|
66.59
|
15
|
22.391
|
73.611
|
B.8
|
1 Ro + 2 Cl
|
0.41
|
106
|
20
|
28.77
|
82.88
|
B.9
|
1 Ro + 3 Cl
|
0.39
|
106
|
20
|
15.90
|
77.91
|
15
|
20.911
|
83.221
|
B.10
|
1 Ro + 3 Cl
|
0.37
|
106
|
20
|
25.33
|
87.91
|
Ro = Rougher, Cl =
Cleaner
|
1 = Estimated
|
Table 3 – Bond Ball Mill Work Index comminution test
results
BLOCK
|
kWhr/tonne
|
B.1
|
13.91
|
B.2
|
15.78
|
B.3
|
16.67
|
B.4
|
16.97
|
B.5
|
13.70
|
B.6
|
14.92
|
B.7
|
12.23
|
B.8
|
14.87
|
B.9
|
15.16
|
B.10
|
15.66
|
Average
|
14.99
|
About the Escacena
Project
The Escacena Project comprises a large, contiguous,
5,760-hectare land package controlled 100% by Pan Global in the
east of the Iberian Pyrite Belt. Escacena is located near the
operating mine at Riotinto and is immediately adjacent to the
former Aznalcóllar and Los Frailes mines where Minera Los
Frailes/Grupo México is in the final permitting stage with
construction anticipated to start in 2024. The Escacena Project
hosts Pan Global's La Romana copper-tin-silver and Cañada
Honda copper-gold discoveries and a number of other
prospective targets, including, Bravo, Barbacena, El Pozo,
Romana Norte, San Pablo, Zarcita,
Hornitos, La Jarosa, and Romana
Deep.
About Pan Global
Resources
Pan Global Resources Inc. is actively targeting copper-rich
mineral deposits, given copper's compelling supply-demand
fundamentals and outlook for strong long-term prices as a critical
metal for global electrification and energy transition. The
Company's flagship Escacena Project is located in the prolific
Iberian Pyrite Belt in southern Spain, where a favourable permitting track
record, excellent infrastructure, mining and professional
expertise, and support for copper as a Strategic Raw Material by
the European Commission collectively define a tier-one jurisdiction
for mining investment. The Pan Global team comprises proven talent
in exploration, discovery, development, and mine operations - all
of which are committed to operating safely and with utmost respect
for the environment and our partnered communities. The Company is a
member, and operates under the principles, of the United Nations
Global Compact.
Qualified Persons
Álvaro Merino, Vice President Exploration for Pan Global
Resources and a qualified person as defined by National Instrument
43-101, has approved the scientific and technical information for
this media release. Mr. Merino is not independent of the
Company.
Forward-looking
statements
Statements which are not purely historical are forward-looking
statements, including any statements regarding beliefs, plans,
expectations, or intentions regarding the future. It is important
to note that actual outcomes and the Company's actual results could
differ materially from those in such forward-looking statements.
The Company believes that the expectations reflected in the
forward-looking information included in this media release are
reasonable, but no assurance can be given that these expectations
will prove to be correct and such forward-looking information
should not be unduly relied upon. Risks and uncertainties include,
but are not limited to, economic, competitive, governmental,
environmental, and technological factors that may affect the
Company's operations, markets, products, and prices. Readers should
refer to the risk disclosures outlined in the Company's Management
Discussion and Analysis of its audited financial statements filed
with the British Columbia Securities Commission.
The forward-looking information contained in this media release
is based on information available to the Company as of the date of
this media release. Except as required under applicable securities
legislation, the Company does not intend, and does not assume any
obligation, to update this forward-looking information.
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SOURCE Pan Global Resources Inc.