Tantalex Lithium Resources Achieves Spodumene Concentrate Grade of 6+% Li2O During HLS Metallurgical Testwork at Landfill K of Manono Tailings Reclamation Project, DRC


Strong points

  • Heavy Liquid Separation (“HLS”) tests on 2 ton bulk samples taken from the K landfill yielded a concentration of 6+% LiO spodumene concentrate has four different size classifications.

    • HLS testing produced a 6.5% Li2O spodumene concentrate with overall lithium recoveries greater than 60%.

    • Fe content of +- 1.3% in the final spodumene concentrate to be further reduced with magnetic separation in the phase 2 tests.

    • The HLS test is the industry standard laboratory test to determine if physical metallurgy will be sufficient to enrich mineral deposits into salable concentrates.

  • In the K-dump, LiO, Sn and Ta are uniformly distributed over the different size fractions from -5 mm to +45 µm. Lithium recoveries increased with size fraction while tin and tantalum had improved recoveries in finer fractions, indicating that tin and tantalum required additional release to improve recoveries.

  • Upstream classification, dense media separation (“DMS”) and gravity concentration technologies will be evaluated during the Phase 2 trial program to design the optimal plant for the extraction of lithium, tin and tantalum.

Toronto, Ontario – TheNewswire – September 13, 2022 – Tantalex Lithium Resources Corp. (CSE: TTX)(FSE: DW8)(OTC:TTLXF) (“Tantalex“or the”society”), is pleased to announce the results of metallurgical testing on a composite bulk sample of 331 kg (sub-sample of the sample of approximately 2 tonnes taken from drill holes MDC047, MDC056 and MDC 064 slots ) collected from Landfill K of the Manono Reclamation Project located in the province of Tanganyika in the Democratic Republic of the Congo (“DRC”). Mineralogical analysis indicated that almost all of the lithium is contained in spodumene. It has further been determined that cassiterite is the only mineral containing tin and that in the case of tantalum the overwhelming majority occurs as tantalite with low concentrations of tapiolite.

HLS testing yielded 6+% Li2O spodumene concentrates with high lithium recoveries exceeding 60% and an iron content of approximately 1.3% Fe2O3 without performing magnetic separation on the produced concentrate. Although the HLS results are only an indication of the performance of an operating DMS circuit, the results indicate that the DMS will be applicable to the project flowsheet as the primary driver for lithium recovery in the coarse fraction. . Additional conventional technologies will be tested to establish the optimal enrichment of the -0.5 mm fraction.

A summary of the results of the HLS test work for the K-dump can be viewed in the table below. It is important to note that the current test campaign only focused on the primary enhancements of Tin and Tantalum.






top note






Concentrate Category




top note






Concentrate Category



One of the main reasons for the good HLS results is the coarse-grained nature of spodumene at K-dump which allows high release of spodumene with no crushing necessary as the in situ material is 99%-5 mm. This means for the company that the coarse spodumene fraction can be processed using the most conventional mineral processing technique in the industry with no additional crushing/grinding required. The cutting density can also be lowered from 2.95 t/m3 which were used in trials to improve recoveries while maintaining the SC6 grade.

In the K discharge, Li2O, Sn and Ta are evenly distributed over the different size fractions from 45 µm to > 1.2 mm, as seen in Figure 1. A small amount of Li2O, Sn and Ta reported to the ultra-thin (-45µm)

Figure 1: Li2O, Sn and Ta distribution in the material K-Dump -5 mm

The HLS trials indicate that it is possible to opt for a phased approach in the construction of the plant by upgrading the coarse fraction first in a robust and cost-effective way while expanding the processing facility at a later stage. to recover the fine precious material.

Hannes Miller, the company’s COO, comments: “The results of these early trials are encouraging given that these are landfill materials. The asset has very little associated extraction costs and producing a marketable product with a robust and well-known process is strongly preferred over a flotation-only operation. Dense Media Separation (DMS) is a less complicated process to operate, more cost effective and can be commissioned in a much shorter period of time. I look forward to the results of the planned Phase 2 metallurgical tests”.

The metallurgical test program was carried out by CoreMet Mineral Processing in South Africa. The program included head characterization and HLS testing to develop appropriate enrichment methods. The full report will be released in the near future and will include test results for C-dump and G-dump.

Phase II testing will include a DMS, gravity, upstream classification and flotation test using the remaining bulk sample. The primary objective is to confirm the HLS results as well as refine the ore processing flowsheet for the project. The coarse fraction should be treated by a DMS circuit with the intermediate and fine DMS fractions (-0.5 mm) treated by a gravity circuit to recover minerals containing tin and tantalum while the tailings will undergo flotation to establish the full potential that can be realized on the K-dump. Further work will include magnetic separation and upstream classification to remove impurities in the spodumene concentrate.

Qualified person

The scientific and technical content of this press release has been reviewed and approved by Mr. Gary Pearse MSc, P. Eng, who is a “qualified person” as defined by National Instrument 43-101 Standards of Disclosure for Mineral Projects ( “National Instrument 43-101”).

About Tantalex Lithium Resources Corporation

Tantalex is an exploration and development stage mining company engaged in the acquisition, exploration, development and distribution of lithium, tin, tantalum and other high technology mineral properties in Africa. The Company is listed on the Canadian Stock Exchange (symbol: TTX), the Frankfurt Stock Exchange (symbol: DW8) and the OTCQB Venture Market (symbol TTLXF).

Caution Regarding Forward-Looking Statements

The information in this press release includes certain information and statements about management’s view of future events, expectations, plans and prospects that constitute forward-looking statements. These statements are based on assumptions subject to significant risks and uncertainties. Due to these risks and uncertainties and due to various factors, actual results, expectations, achievements or performance may differ materially from those anticipated and indicated by these forward-looking statements. Although Tantalex believes that the expectations reflected in the forward-looking statements are reasonable, it cannot guarantee that the expectations in the forward-looking statements will prove to be correct. Except as required by law, Tantalex disclaims any intention and undertakes no obligation to update or revise forward-looking statements to reflect actual results, whether as a result of new information, future events, changes in assumptions, changes in factors affecting these forward-looking statements. or otherwise.

The Canadian Securities Exchange (CSE) has not reviewed this press release and accepts no responsibility for its adequacy or accuracy.

For more information please contact:

Eric Allard

President and CEO

E-mail: This email address is protected from spam. You need JavaScript enabled to view it.

Website: https://tantalexlithium.com/

Tel: 1-581-996-3007


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