Piedmont Lithium Announces Outstanding PFS-level Metallurgical Results
17 July 2019 - 08:00PM
Business Wire
- Testwork confirms ability to produce high-grade, low
impurity spodumene concentrate
- Flow sheet adjusted to incorporate a combination of DMS and
flotation processing
- Process simulations based on testwork results support a
design basis of 85% lithium recovery
- Mineralogy shows spodumene as the only lithium bearing
mineral in concentrate
- Optimization to further improve recoveries will be
undertaken during Definitive Feasibility Study
- Updated flow sheet will be reflected in a Scoping Study
update expected in the next 30 days
Piedmont Lithium Limited (“Piedmont” or “Company”)
is pleased to announce positive results from pre-feasibility study
(“PFS”) level metallurgical test work conducted on composite
samples of ore from the Piedmont Lithium Project (“Project”)
performed at SGS testing laboratories in Lakefield, Ontario.
Dense Medium Separation (“DMS”) and flotation Locked-Cycle Tests
(“LCT”) test work results showed high quality spodumene concentrate
product with a grade above 6.0% Li2O, iron oxide below 1.0%, and
low impurities from composite samples. Piedmont test results
compare favorably in several quality categories with the reported
shipments of three emerging Australian spodumene producers.
Table 1: Results of Dense Medium
Separation + Locked Cycle Flotation Test Results (Composite Sample
1)
Sample
Feed Grade Li2O (%)
Concentrate Grade Li2O
(%)
Fe2O3 (%)
Na2O (%)
K2O (%)
CaO+ MgO + MnO (%)
P2O5 (%)
Piedmont Composite Sample 1
1.11
6.35
0.93
0.63
0.49
0.96
0.32
Australian Producer 1
NR
6.00
1.20
NR
NR
NR
NR
Australian Producer 2
NR
5.90
1.50
NR
NR
NR
NR
Australian Producer 3
NR
6.10
0.61
0.80
0.76
0.79
0.30
NR: Not Reported
The composite samples were prepared to approximate the average
grade of the Project’s ore body. Overall lithium recovery during
testwork for the preferred flowsheet was 77% at a grade of 6.35%
Li2O. Simulations based on the testwork results support an overall
plant design recovery of 85% when targeting a 6.0% Li2O spodumene
concentrate product. Further optimization will be undertaken in a
future feasibility level pilot testwork program.
The Company’s forthcoming Scoping Study update will incorporate
the updated flow sheet developed during this test work program. The
benefit of incorporating DMS technology into the flow sheet will be
reduced operating costs and accelerated ramp-up.
Keith D. Phillips, President and Chief Executive Officer,
commented: “We are very pleased with the results of this PFS-level
testwork program, which confirms the outstanding mineralogy and
metallurgy of the Piedmont Lithium Project. We look forward to
reflecting these strong results in our forthcoming Scoping Study
update, which will also incorporate the substantially larger
mineral resource announced in June as well as several other
constructive refinements.”
Click here to view the full ASX Announcement.
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version on businesswire.com: https://www.businesswire.com/news/home/20190717005183/en/
Keith D. Phillips President & CEO T: +1 973 809 0505
E: kphillips@piedmontlithium.com Anastasios (Taso) Arima
Executive Director T: +1 347 899 1522 E:
tarima@piedmontlithium.com
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