TIDMSAV
RNS Number : 3291O
Savannah Resources PLC
29 January 2019
29th January 2019
Savannah Resources Plc
Mina do Barroso Lithium Project -
Excellent Metallurgical Test Work Results
Highlights:
-- Excellent test work results continue to show that a
conventional, 6% Li O, low impurity concentrate can be produced
with high recoveries;
-- Test work on drill core samples from the Grandao deposit has
produced concentrates containing 6%-6.5% Li(2) O, with
corresponding lithium recoveries in excess of 80%;
-- The Grandao deposit currently represents the first five years
of mine production, and test work is underway to gauge the
variability in metallurgical response that might be expected;
-- The lithium concentrates produced have low iron and impurity
levels with market research and initial customer discussions
indicating that such concentrates should be suitable for conversion
to either lithium carbonate or lithium hydroxide for use in lithium
ion batteries;
-- Planning underway to run a pilot programme on a bulk sample
of ore to define the process flow sheet to a level suitable for
final plant design; and
-- Work is continuing on testing other deposits within the project area.
Savannah Resources plc (AIM: SAV, FWB: SAV and SWB: SAV)
('Savannah' or the 'Company'), the AIM quoted resource development
company, which is focused on becoming Europe's most significant
producer of lithium spodumene concentrates from its Mina do Barroso
Project in Portugal ('Mina do Barroso', 'MdB' or 'the Project'), is
pleased to announce that its ongoing metallurgical test work
programme continues to successfully produce saleable grades of
lithium spodumene products.
The Project is targeting an average annual production of 175,000
tonnes of spodumene concentrate at a grade of 6% Li(2) O. Process
development is also aiming at the production of feldspar and quartz
by-products for the regional ceramics industries in the region,
which, coupled with ongoing resource exploration, will reduce the
environmental footprint of the project and add substantially to the
project viability.
Savannah's CEO, David Archer said: "To see such excellent
results from the metallurgical test work is encouraging as it
continues to validate Mina do Barroso as a conventional lithium
project in terms of the process flow-sheet and the product
produced. Ongoing test work will continue to help refine our
understanding of the behaviour of the produced material and I look
forward to continuing to update our shareholders over the coming
months."
Test Work Overview
Savannah has successfully produced high grade spodumene
concentrate by a standard, whole of ore flotation process from a
composite of core samples taken from the Grandao deposit. Grandao
currently represents the first five years of mining.
For this test work, which was managed by Savannah's own team
representatives and conducted in Perth at ALS Laboratories, the
sample was subjected to an industry standard beneficiation process,
to generate a high grade spodumene concentrate, which consisted
of:
-- Conventional crush and grind;
-- Desliming and low intensity magnetic separation;
-- Flotation to remove mica bearing minerals ahead of spodumene flotation; and
-- Conventional spodumene rougher and cleaner flotation using
industry standard reagents to generate a high-grade lithium
concentrate.
This test work programme was conducted on a fresh pegmatite
composite with a Li(2) O head grade of 1.3% which was higher than
the head grade of 1.1% previously assumed in the scoping study.
Variability work is now underway to reassess the deposit grade and
to assess the expected variation of metallurgical response to
different grades and ore types.
The spodumene concentrate produced had an unoptimized grade of
6.15% Li(2) O at a lithium recovery of 82.4%. One test produced a
concentrate Li(2) O grade of 6.50% at a reduced Li(2) O recovery.
This test was conducted using an open flotation circuit with
intermediate tailings streams not included in the final Li(2) O
recovery. Recycling of these streams is expected to improve the
overall Li(2) O recovery in planned closed circuit test work with
the Li(2) O concentrate grade still expected to remain at
>6%.
A similar result has been obtained in a second round of testing,
using the above process on the same sample at ALS Laboratories,
demonstrating the selected process is robust and the results are
reproducible.
Savannah's market research and initial potential customer
correspondence has indicated that a concentrate with the
specification achieved is suitable for conversion to either a
lithium carbonate or lithium hydroxide for use in lithium ion
batteries. Penalty elements such as iron were below the limits
specified by customers.
Spodumene product assayed chemical grades are shown below:
Product Grade (%)
--------------------------------------------------------------------
Li(2) O Fe Al(2) O(3) SiO(2) TiO(2) Mn S P
-------- ----- ----------- ------- ------- ----- ------ -----
Spodumene Concentrate 6.15 0.57 25.1 62.6 <0.01 0.15 <0.01 0.30
-------- ----- ----------- ------- ------- ----- ------ -----
Savannah is progressing the metallurgical test work programme at
laboratory scale, in order to;
-- test the variability;
-- do further optimisation by doing locked cycle testing; and
-- test the recovery of acceptable feldspar and quartz concentrates.
Finally, it is planned to do pilot scale testing on bulk samples
of Grandao ore in the next few months, in order to confirm the flow
sheet process parameters and to provide the necessary information
for the final plant design. Savannah is in discussions with the
laboratories that have the capability to complete a suitable pilot
programme and a decision will be made once all tenders have been
received and reviewed.
Competent Person Statement
The information in this announcement that relates to exploration
results is based upon information compiled by Mr Dale Ferguson,
Technical Director of Savannah Resources Limited. Mr Ferguson is a
Member of the Australasian Institute of Mining and Metallurgy
(AusIMM) and has sufficient experience which is relevant to the
style of mineralisation and type of deposit under consideration and
to the activity which he is undertaking to qualify as a Competent
Person as defined in the December 2012 edition of the "Australasian
Code for Reporting of Exploration Results, Mineral Resources and
Ore Reserves" (JORC Code). Mr Ferguson consents to the inclusion in
the report of the matters based upon the information in the form
and context in which it appears.
The information in this release that relates to metallurgy and
metallurgical test work has been reviewed by Mr Noel O'Brien,
FAusIMM, MBA, B. Met Eng. Mr O'Brien is not an employee of the
company but is employed as a contract consultant. Mr O'Brien is a
Fellow of the Australasian Institute of Mining and Metallurgy, he
has sufficient experience with the style of processing response and
type of deposit under consideration, and to the activities
undertaken, to qualify as a competent person as defined in the 2012
edition of the "Australian Code for the Reporting of Exploration
Results, Mineral Resources and Ore Reserves" (The JORC Code). Mr
O'Brien consents to the inclusion in this report of the contained
technical information in the form and context as it appears.
Regulatory Information
This announcement contains inside information for the purposes
of Article 7 of Regulation (EU) 596/2014.
**ENDS**
For further information please visit www.savannahresources.com
or contact:
David Archer Savannah Resources plc Tel: +44 20 7117
2489
David Hignell / Lindsay SP Angel Corporate Finance Tel: +44 20 3470
Mair (Nominated Adviser) LLP 0470
Christopher Raggett / Camille finnCap Ltd Tel: +44 20 7220
Gochez (Broker) 0500
Grant Barker (Equity Adviser) Whitman Howard Tel: +44 20 7659
1225
Melissa Hancock/ Cosima St Brides Partners Ltd Tel: +44 20 7236
Akerman (Financial PR) 1177
About Savannah
Savannah is a diversified resources group (AIM: SAV) with a
portfolio of energy metals projects - lithium in Portugal and
copper in Oman - together with the world-class Mutamba Heavy
Mineral Sands Project in Mozambique, which is being developed in a
consortium with the global major Rio Tinto. The Board is committed
to serving the interests of its shareholders and to delivering
outcomes that will improve the lives of the communities we work
with and our staff.
The Company is listed and regulated on AIM and the Company's
ordinary shares are also available on the Quotation Board of the
Frankfurt Stock Exchange (FWB) under the symbol FWB: SAV, and the
Börse Stuttgart (SWB) under the ticker "SAV".
This information is provided by RNS, the news service of the
London Stock Exchange. RNS is approved by the Financial Conduct
Authority to act as a Primary Information Provider in the United
Kingdom. Terms and conditions relating to the use and distribution
of this information may apply. For further information, please
contact rns@lseg.com or visit www.rns.com.
END
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