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- La Romana tin mineralization is amenable to producing
high-quality tin concentrate by conventional gravity
separation
- High tin concentrate grades of 63.2% Sn at 58.1%
recovery
- High-quality copper and tin concentrates offer potential to
meaningfully enhance the project economics
- The excellent metallurgy results are an important de-risking
milestone for advancing La Romana towards economic
assessment
VANCOUVER, BC, April 3,
2024 /CNW/ - Pan Global Resources Inc. ("Pan Global"
or the "Company") (TSXV: PGZ) (OTCQX: PGZFF) (FSE: 2EU) is pleased
to announce positive metallurgical test results for tin recovery at
the La Romana copper-tin-silver discovery in the Escacena Project,
southern Spain. Results indicate a
premium high-grade tin concentrate is achievable using a
conventional gravity separation flowsheet. The tin metallurgy
results complement the recently reported copper metallurgy test
results that showed saleable, high quality clean copper
concentrates can be achieved by conventional froth flotation
(see March 21, 2024 media
release).
"Results from the La Romana tin metallurgy program have exceeded
expectations, confirming that the tin mineralization is well suited
to conventional gravity separation to produce premium tin
concentrates with grades above 60%. For context, modern tin mines
typically produce concentrates grading 50-55% tin. Tin is a rare
bi-product in the Iberian Pyrite Belt and we believe that the tin
at La Romana has the potential to meaningfully enhance overall
project economics. The outstanding copper and tin metallurgy test
results are an important de-risking milestone for the Escacena
Project," said Tim Moody, Pan
Global's President & CEO.
The metallurgical test program was conducted by Wardell
Armstrong International (United
Kingdom), under the coordination and management of Minepro
Solutions SL (Spain). Results
are summarized in table 1 below.
Test result highlights
- The tin metallurgy program demonstrates the La Romana Cu-Sn-Ag
mineralization is amenable to recovery of saleable tin
concentrates.
- Comminution tests to determine the net energy requirements to
grind the tin sample to the product size returned a Bond Ball Mill
Work index (BBMWi) value of 13.1 kWh/t, classified as medium
hardness. The results are typical/within the range expected for
Iberian Pyrite Belt ores.
- The head grade assays for the tests were 0.27% Sn and 0.44%
Cu.
- Mineralogical analyses confirm the tin mineralization is almost
100% cassiterite, which is the optimal mineral for recovery of
tin.
- Particle size analysis to determine grind size indicates the
cassiterite is most concentrated in the -106 to +53 micron, and -53
to +10 microns size fractions. Cassiterite liberation
characteristics were also best in the finer fractions.
- The tin concentration flowsheet included initial flotation
tests to remove sulfides and copper, followed by gravity separation
of tin (cassiterite) from the flotation tailings, and a final
flotation stage to recover tin not captured by the previous
steps.
- The initial sulfide flotation was confirmed as effective for
segregating copper and tin minerals, with most of the copper going
to a rougher concentrate and the tin going to the tailings.
- Tailings from the initial flotation were de-slimed and screened
to improve the response before undergoing a series of open circuit
rougher and cleaner gravity separation steps, using a shaker table
to concentrate the tin:
- Rougher stage gravity confirmed superior tin grades and
recoveries for the -106 to +53 microns and -53 to +10 microns, size
fractions, and from regrinding of the coarser fractions.
- The cleaner tests achieved saleable tin concentrate grades at
this early stage.
- Flotation on residual tailings and finer fraction recovered
minor additional tin.
- The projected closed-circuit results include high overall
concentrate grades of 63.2% tin and 58.1% tin
recovery, excellent for this style of mineralization.
- Additional tests will aim to further verify the results and
target further optimization to improve recovery and quality of the
tin and copper concentrates, along with design and costing
studies.
Table 1 – Tin Metallurgical Test Results Summary
(MINEPRO, 2024)
|
Assay
(%)
|
Overall recoveries
(%)
|
Open
circuit
|
Sn
|
Cu
|
Fe
|
S
|
Sn
|
Cu
|
Fe
|
S
|
Final Sn
concentrate
|
63.19
|
0.12
|
5.89
|
3.12
|
9.5
|
0.0
|
0.0
|
0.0
|
Final
middlings
|
1.19
|
0.07
|
18.09
|
1.24
|
49.4
|
1.4
|
11.1
|
3.8
|
Final
tailings
|
0.11
|
0.52
|
16.16
|
3.53
|
41.1
|
98.6
|
88.9
|
96.2
|
Closed
circuit
Final Sn
concentrate
|
63.2
|
0.10
|
5.9
|
3.1
|
58.1
|
11.2
|
18.9
|
13.0
|
Tin metallurgy program
The tin mineralization at La Romana commonly grades between
0.05% to 0.5% Sn within the copper zone and occasionally exceeds 1%
Sn over 1m intervals. Metal zonation
is also recognized across the current 1.4km strike length for the
deposit, from copper with low tin in the east to copper with
increasing tin towards the west where the deposit remains open.
A 96kg composite was collected for the metallurgy test work,
comprised of sample intervals of drill core from three drill holes
within an area of the La Romana deposit where the drilling
indicates more continuous higher-grade tin mineralization. Sample
locations for the tin metallurgy tests are shown in Figure 1.
The steps undertaken to produce a saleable tin concentrate from
the composite sample are provided in the flowsheet in Figure 2.
All the tin metallurgy tests were conducted under open-circuit
conditions, where a portion of the tin is potentially lost
throughout the process as middlings or tailings. However, there is
potential to recover additional tin from the middlings and tailings
under closed-circuit conditions. Hence, a final projected closed
circuit concentrate grade and recovery was calculated based on
open-circuit results, and incorporating estimates of 90% tin
recovery from middlings and 10% from tailings.
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.