Sayona mining ltd (asx sya) completion of the authier metallurgical pilot program – abn newswire (@abn newswire) database version control

Completion of the Authier Metallurgical Pilot ProgramBrisbane, May 22, 2018 AEST (ABN Newswire) – Sayona Mining Limited ( ASX:SYA) ( OTCMKTS:DMNXF) ("Sayona" or the "Company") is pleased to announce the completion of the Authier lithium project pilot plant operation at SGS Canada Inc. ("SGS").

Approximately 5.5 tonnes of mineralised pegmatite ore was collected during the Phase 3 drilling program in December 2017. The diamond drill core was assayed and stage-crushed to the appropriate particle size to feed the pilot plant. Two composite pilot plant feed samples have been prepared to represent Years 0 to 5 and Years 5+ of the operation.

The pilot plant operated for over 100 hours at a feed rate of 50 kg/hour and produced over 400 kg of spodumene concentrate.


The pilot plant flowsheet included grinding, de-sliming, magnetic separation, mica and spodumene flotation (see Figure 2 in link below). The optimised pilot flowsheet was able to achieve a concentrate grading 6.0% Li2O at a 79% recovery. The pilot program has confirmed the final process flow sheet and operating parametres for the Definitive Feasibility Study ("DFS").

In addition, prior to the pilot plant operation, a number of batch and locked-cycle testing programs were run to confirm the optimal conditions for the final pilot testing program. The results were similar to historical testing programs incorporated into the Pre-Feasibility Study, including:

Dan O’Neill, Managing Director, commented "The Company is pleased with the excellent results achieved during the program, enabling the final design of the plant for the DFS. The program assists in de-risking the metallurgical parametres for the plant construction, commissioning and ramp-up periods. Over the next six months, the Company will continue to undertake further testing targeting improvements to the operating parametres of the plant, including a testing program at the McGill University".

Approximately 5.5 tonnes of mineralised pegmatite ore was collected during the Phase 3 drilling program in December 2017 (see Figures 4, 5 and 6 in link below). The diamond drill core was assayed and stage-crushed to the appropriate particle size to feed the pilot plant. Two composite pilot plant feed samples have been prepared to represent Years 0 to 5 and Years 5+ of the operation – see Table 1 in link below.

An 80 kilogram sub-sample of each composite was used for batch and locked-cycle-testing. Over 40 batch flotation tests were completed assessing variations in grind size, reagents and dosages, and with and without the use of mica flotation. The optimal batch flotation test conditions produced a 6.0% Li20 concentrate grade at an 82% recovery.

Based on the optimal flotation conditions from both the batch and locked cycle testing program, the pilot plant program was designed. The two composites were campaign processed through the pilot plant which operated at 50 kg/hour and produced over 400 kg of spodumene concentrate. The pilot plant flowsheet included grinding, de-sliming, magnetic separation, mica and spodumene flotation. The best campaign run produced a 6% Li20 concentrate at a 79% lithium recovery. During each campaign the test conditions were modified with the aim of maximising the recovery and concentrate grade. As a result there was some variability in the results over the total program. Figure 1 (see link below) compares the batch, locked-cycle and continuous pilot plant grade-recovery curves. Pilot plant results on the optimized flowsheet resulted in 71-76% lithium recovery for Composite 1 and 73-79% recovery for Composite 2.

Concentrate and tailings samples from the pilot plant were sent to Pocock Industrial Inc. in Salt Lake City, Utah for thickening (flocculent screening, static and dynamic settling) and filtration testing. The data produced will be used to size the industrial equipment for the solid-liquid separation.

Sayona will continue process optimisation work through a collaboration with Prof. Kristian Waters who specializes in mineral processing at the McGill University in Montréal, Québec. A research project has commenced at the University to further explore the key findings from the pilot plant.

Sayona Mining Limited ( ASX:SYA) ( OTCMKTS:DMNXF) is an Australian-based, ASX-listed (SYA) company focused on sourcing and developing the raw materials required to construct lithium-ion batteries for use in the rapidly growing new and green technology sectors. Sayona’s primary objective is developing the Authier lithium project in Quebec, Canada. Authier is an advanced, development project, construction forecast to commence in early 2019 and first concentrate production in early 2020. Please visit us as at www.sayonamining.com.au

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