REG - European Metals Hldg - Testwork Realises Outstanding Lithium Recoveries

European Metals HoldingsAnnouncement

25/05/2023 07:00

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RNS Number : 5831A  European Metals Holdings Limited  25 May 2023

For immediate release

 

25 May 2023

 

Testwork Realises Continued Outstanding Lithium Recoveries

Highlights:

-     Testwork confirms separation efficiency and capability of flotation
of lithium-bearing zinnwaldite from Cinovec,

-     Flotation testwork repeatedly reached >95% lithium recovery to
flotation concentrates at target Li-grades and mass yield

-     DFS remains on track for completion in Q4 2023

European Metals Holdings Limited (ASX & AIM: EMH, OTCQX: EMHXY, ERPNF and
EMHLF) ("European Metals" or the "Company") is pleased to announce favourable
testwork results which confirm separation efficiency and capability of
flotation of lithium-bearing zinnwaldite.

The updated flotation testwork recently undertaken at Nagrom Laboratories
(Perth) has repeatedly reached >95% lithium recovery from flotation
concentrates at target Li-grades and mass yield. Ongoing testwork to confirm
the robust nature of the process and optimise the Definitive Feasibility Study
("DFS") design has surpassed previous performance indicators.

Results from testing and optimisation of flotation for the concentration of
zinnwaldite in fine ore has exceeded expectations and further demonstrated the
potential for high overall lithium recoveries when combined with magnetic
separation for the coarse particle size ranges.

Detailed information on the floatation testwork conducted on Cinovec
zinnwaldite ore is provided at the end of this report.

Commenting on the recent testwork European Metals Executive Chairman Keith
Coughlan said:

"The exceptional lithium extraction results are outstanding and further
underline the commercial viability of operations at Cinovec. These results
show repeatability of >95% lithium recovery at neutral pH and confirm both
capex and opex reductions, demonstrating the strong operational viability of
the FECAB plant. We look forward to further results of the ongoing
optimisation work as part of the DFS.  The neutral pH of the flotation
further enhances the already strong ESG credentials of the Cinovec Project
particularly when compared to the acid flotation used on micas elsewhere
around the globe. We expect the current testwork to be completed by the end of
June and will publish the full results."

Flotation Testwork Protocol

The Front-End Comminution and Beneficiation (FECAB) process beneficiates
Cinovec ore by recovering liberated lithium-bearing zinnwaldite from the
quartz and feldspar host rock, collecting the zinnwaldite into a clean
concentrate suitable to feed the downstream Lithium Chemical Plant (LCP):

·    Testwork to concentrate zinnwaldite traditionally focused on using
Wet High Intensity Magnetic Separation (WHIMS) as the only technology of
beneficiation. Results demonstrated suitability of magnetic separation for
coarse ore, but also the need for an alternative technology suited for
concentration of the fine fractions, to enable maximising lithium recoveries
across all particle size ranges.

 

·   Further studies into liberation of "mica-like" zinnwaldite from the
quartz and feldspar host rock revealed that almost complete liberation is
achieved at a grind size of 500 micrometres ("μm"), which is significantly
coarser than the 250μm previously applied. Operating at a coarser grind size
results in overall reduction in energy required, whilst reducing deportment of
zinnwaldite into ultra-fine particle fractions due to comminution.

 

·    Testwork using flotation technology demonstrated suitability of this
technology for concentration of fine zinnwaldite and improved recovery
performance, compared to magnetic separation for fine particle size ranges.

 

·    Traditionally, successful flotation of "mica-like" minerals was only
possible at highly acidic pH levels. Flotation testwork for the Cinovec
project aimed and proved to be successful at performing flotation at neutral
pH. This renders the process more environmentally and operationally friendly.

 

·    Testwork results demonstrated repeated >95% lithium recovery with
fully deslimed ore samples, producing zinnwaldite concentrate at target
lithium grades.

 

·     Further testwork to quantify the effect of slimes on flotation
efficiency and to enhance recovery of lithium from ultra-fines, was completed.
The tests correspondingly produced concentrate at >95% lithium recovery at
target lithium grade, using samples containing up to 8% slimes. This is a
significant achievement, as the tests demonstrate the robustness of the
process under simulated plant operating conditions.

 

·     The flotation process and subsequent concentrate cleaning results
in final concentration of clean zinnwaldite into 30% of the original flotation
feed mass (at 95% lithium recovery), thereby demonstrating flotation as an
efficient concentrating technology for Cinovec ore.

 

·     The flotation process for Cinovec is relatively simple, using only
a collector and minor quantities of pH-regulating reagents. The final
optimised flowsheet design is minimal, employing only Rougher, Scavenger and a
single Cleaner stage.

 

·    Testing and optimisation of flotation for concentration of the fine
ore has realistically pioneered the achievement of high overall lithium
recovery when combined with magnetic separation for the coarse particle size
ranges.

 

·    In the optimised Cinovec FECAB flowsheet, flotation will process
overall 42% of ROM, including milled middlings arising from the magnetic
separation process. This excludes ultra-fine slimes which are required to be
removed prior to flotation.

 

·    Further optimisation of the flotation process at Nagrom resulted in
elimination of the attritioning process (violent stirring of the flotation
feed) prior to flotation and an increase in flotation feed pulp density. The
direct consequences of these positive outcomes are:

 

·      Significant reduction in ore break-down and creation of
ultra-fines or slimes.

 

·      A reduction in ultra-fines results in a direct decrease of
possible lithium losses to slimes.

 

·      Saving in capital cost (equipment related) and operating cost
(due to direct decrease in energy required and reduced maintenance frequency).

 

·     In additional testwork currently underway, core samples,
representing three different lithium life-of-mine feed grades, will be
processed through the optimised FECAB flowsheet to quantify the effect of feed
grade on recovery of lithium as well as chemical properties of the resulting
concentrate for the LCP feed.

 

This announcement has been approved for release by the Board.

CONTACT

For further information on this update or the Company generally, please visit
our website at www.europeanmet.com (http://www.europeanmet.com) or see full
contact details at the end of this release.

 

BACKGROUND INFORMATION ON CINOVEC

PROJECT OVERVIEW

Cinovec Lithium/Tin Project

Geomet s.r.o. controls the mineral exploration licenses awarded by the Czech
State over the Cinovec Lithium/Tin Project. Geomet has been granted a
preliminary mining permit by the Ministry of Environment and the Ministry of
Industry. The company is owned 49% by EMH and 51% by CEZ a.s. through its
wholly owned subsidiary, SDAS. Cinovec hosts a globally significant hard rock
lithium deposit with a total Measured Mineral Resource of 53.3Mt at 0.48%
Li(2)O and 0.08% Sn, Indicated Mineral Resource of 360.2Mt at 0.44% Li(2)O and
0.05% Sn and an Inferred Mineral Resource of 294.7Mt at 0.39% Li(2)O and 0.05%
Sn containing a combined 7.39 million tonnes Lithium Carbonate Equivalent and
335.1kt of tin (refer to the Company's ASX release dated 13 October 2021)
(Resource Upgrade at Cinovec Lithium Project).

An initial Probable Ore Reserve of 34.5Mt at 0.65% Li(2)O and 0.09% Sn
reported 4 July 2017 (Cinovec Maiden Ore Reserve - Further Information) has
been declared to cover the first 20 years mining at an output of 22,500tpa of
lithium carbonate (refer to the Company's ASX release dated 11 July 2018)
(Cinovec Production Modelled to Increase to 22,500tpa of Lithium Carbonate).

This makes Cinovec the largest hard rock lithium deposit in Europe, the fifth
largest non-brine deposit in the world and a globally significant tin
resource.

The deposit has previously had over 400,000 tonnes of ore mined as a trial
sub-level open stope underground mining operation.

On 19 January 2022, EMH provided an update to the 2019 PFS Update, conducted
by specialist independent consultants, which indicates a post-tax NPV of
USD1.938B and a post-tax IRR of 36.3% and confirmed that the Cinovec Project
is a potential low operating cost producer of battery-grade lithium hydroxide
or battery grade lithium carbonate as markets demand. It confirmed the deposit
is amenable to bulk underground mining (refer to the Company's ASX release
dated 19 January 2022) (PFS Update delivers outstanding results).
Metallurgical test-work has produced both battery-grade lithium hydroxide and
battery-grade lithium carbonate in addition to high-grade tin concentrate at
excellent recoveries. Cinovec is centrally located for European end-users and
is well serviced by infrastructure, with a sealed road adjacent to the
deposit, rail lines located 5 km north and 8 km south of the deposit, and an
active 22 kV transmission line running to the historic mine. As the deposit
lies in an active mining region, it has strong community support.

The economic viability of Cinovec has been enhanced by the recent strong
increase in demand for lithium globally, and within Europe specifically.

There are no other material changes to the original information and all the
material assumptions continue to apply to the forecasts.

 

BACKGROUND INFORMATION ON CEZ

Headquartered in the Czech Republic, CEZ a.s. is an established, integrated
energy group with operations in a number of Central and South-eastern
European countries and Turkey. CEZ's core business is the generation,
distribution, trade in, and sales of electricity and heat, trade in and sales
of natural gas, and coal extraction. CEZ Group is one of the ten largest
energy companies in Europe, has 28,000 employees and annual revenue of
approximately EUR 9.97 billion.

The largest shareholder of its parent company, CEZ a.s., is the Czech
Republic with a stake of approximately 70%. The shares of CEZ a.s. are traded
on the Prague and Warsaw stock exchanges and included in the PX and WIG-CEE
exchange indices. CEZ's market capitalization is approximately EUR 17.7
billion.

As one of the leading Central European power companies, CEZ intends to develop
several projects in areas of energy storage and battery manufacturing in the
Czech Republic and in Central Europe.

CEZ is also a market leader for E-mobility in the region and has installed and
operates a network of EV charging stations throughout Czech Republic. The
automotive industry in the Czech Republic is a significant contributor to GDP,
and the number of EV's in the country is expected to grow significantly in the
coming years.

ENQUIRIES:

 European Metals Holdings Limited            Tel: +61 (0) 419 996 333

 Keith Coughlan, Executive Chairman          Email: keith@europeanmet.com

 Kiran Morzaria, Non-Executive Director      Tel: +44 (0) 20 7440 0647

 Shannon Robinson, Company Secretary         Tel: +61 (0) 418 675 845

                                             Email: shannon@europeanmet.com

 WH Ireland Ltd (Nomad & Joint Broker)

 James Joyce/ Darshan Patel                  Tel: +44 (0) 20 7220 1666

 (Corporate Finance)

 Harry Ansell (Broking)

 Panmure Gordon (UK) Limited (Joint Broker)  Tel:  +44 (0) 20 7886 2500

 John Prior

 Hugh Rich

 James Sinclair Ford

 Harriette Johnson

 Blytheweigh (Financial PR)                  Tel: +44 (0) 20 7138 3222

 Tim Blythe

 Megan Ray

 Chapter 1 Advisors (Financial PR - Aus)

 David Tasker                                Tel: +61 (0) 433 112 936

 

 

 

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