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Chariot Corporation Limited (“Chariot”, “CC9” or the “Company”) is pleased to advise that it has intersected significant zones of strong lithium-tantalum mineralisation in the first three (3) holes (“First Three Holes”) of the maiden drill program at the Black Mountain Project (“Black Mountain”), in Wyoming, U.S.A.
HIGHLIGHTS:
- Black Mountain maiden drill program delivers strong initial hard rock lithium results with multiple mineralised lithium intersections from first three (3) holes
- First three (3) holes all intersected high-grade spodumene mineralisation confirming the potential of the Black Mountain LCT pegmatite swarms
- Notable results from first three (3) holes include:
- BMDDH23_01 15.48m @ 1.12% Li2O and 79ppm Ta2O5 from 2.74m, including 4.27m @ 2.46% Li2O and 128 ppm Ta2O5 from 9.94m
- BMDDH23_02 14.33m @ 0.84% Li2O and 61ppm Ta2O5 from 1.83m, including 2.29m @ 3.09% Li2O and 138ppm Ta2O5 from 10.67m
- BMDDH23_03 18.81m @ 0.85% Li2O and 98ppm Ta2O5 from 45.26m, including 5.79m @ 1.08% Li2O and 105ppm Ta2O5 from 47.55m
- High-grade potential with individual grades downhole of up to 3.79% Li2O and 230ppm Ta2O5
- Drilling continues with eight (8) holes having been completed to date, assay results for the subsequent five (5) holes are pending and expected to be announced by April 2024
- BDDDH23_01 intersected a zone of stockwork vein and disseminated pyrite-pyrrhotite mineralisation over an interval of approximately 100m within the biotite schist
- The Company is optimistic it may have intersected the peripheral portion of a potentially larger base metal mineral system, with selected intervals grading up to 0.6% (6,012ppm) Cu, 1.0% (9,931ppm) Zn and 15.4% (154,412ppm) Pb
- The Company plans to extend the soil sampling program and run preliminary IP lines over the base metals anomaly in Q3 2024
These drill results confirm the potential of the Black Mountain lithium caesium tantalum (“LCT”) pegmatite swarms with the assays returning individual lithium and tantalum values of up to 3.79% Li2O (BMDDH23_01-0021) and 230ppm Ta2O5 (BMDDH23_01-0033).
This is the first hard rock lithium discovery, through drilling, in Wyoming, U.S.A. Wyoming Lithium Pty Ltd (“WLPL”) and Panther Lithium Corporation (“PLC”) co-founder1, Dr Edward Max Baker2 commented:
“We’ve got stunning initial results in the midst of the North American winter. The targeted hard rock lithium system has been intersected in multiple holes, but we need to come back in the North American summer for a 5,000 – 10,000m drill program to get a better handle of the resource potential. The base-metals sulfide mineralisation is also very promising and indicates the potential for base metals and/or gold mineralisation, separate from the lithium mineralisation.”
First Three Holes: Drill Results
The First Three Holes (being drill holes BMDDH23_01 to BMDDH23_03) have been completed and assayed with the results summarised in Table 1 (see also Figure 1). A total of eight (8) holes have been drilled to date. The assay results for the subsequent five (5) drill holes are pending and expected to be announced by the end of April 2024.
The drill intercepts reported from the First Three Holes confirm the lithium potential of the Black Mountain LCT pegmatites (see Table 1), as indicated by the surface rock chip sampling results which were disclosed in the Company’s initial public offering prospectus and the Company’s announcement dated 9 November 2023.
Table 1: Assay results from the first three drill holes at Black Mountain. Intervals reported are downhole/apparent widths which are greater than true widths. * Denotes estimated true width.
The visual inspection of the drill cores indicates that the high-grade lithium values are from intervals containing spodumene mineralisation, with no other lithium bearing mineral phases being visually identified to date.
Figure 1: Plan View of the Black Mountain Project, showing the pegmatite outcrops (dark red) and interpreted folded geometry (in light red) along with the Northwest and Southeast Cross-Section Lines and Drill Collars. The rock chip and soil geochemistry results are also shown. Refer to the Prospectus for the complete set of rock chip assay results1.
BMDDH23_01 and BMDDH23_02 were drilled from Pad 1 in the central Northwest swarm area (“Northwest Area”). BMDDH-23-01 hole was drilled to a depth of 177m at an azimuth of 260 degrees and a dip of -50 degrees (see Figure 2, Figure 3 and Figure 4 for selected photos of Drill Core). BMDDH23_02 hole was drilled to a total depth of 42m with the same azimuth BMDDH-23-01, but with a dip of -65 degrees (see Figure 1).
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Chariot Corporation
Overview
Chariot Corporation (ASX:CC9) is the largest land holder for lithium exploration in the US. It has a strategy to target both hard rock lithium in Wyoming and claystone lithium in Nevada and Oregon. The flagship Black Mountain Project, located in Wyoming, has shown significant mineralization with grades of up to 6.68 percent Li2O from rock chip samples. In addition to the Black Mountain Project, Chariot holds six other hard rock projects in Wyoming with 443 claims covering 3,585 hectares.
Chariot’s second flagship project, Resurgent, holds the second largest land position in the McDermitt Caldera, which hosts the two largest lithium resources discovered to date (Thacker Pass 19.1 million tons (Mt) lithium carbonate equivalent (LCE) and McDermitt 21.5 Mt LCE). The recent $650-million investment in Thacker Pass by General Motors indicates interest from automakers looking to secure a supply of battery raw materials. The McDermitt Caldera’s size and scale potential present an opportunity for Automotive OEMs, battery manufacturers and others to obtain large-scale supply to meet their growth plans.
The automaker's EV targets and government policies banning new internal combustion engine (ICE) car sales could propel lithium demand to 3.7 Mt by 2030, according to projections from mining giant Albemarle. This implies a CAGR of more than 20 percent between 2022 and 2030. As the world's demand for lithium continues to grow, Chariot's exploration and development efforts in the US are well-timed and offer investors exposure to the rapidly growing lithium market.
In addition to exploration-led initiatives, Chariot has been actively focusing on creating value through the divestment of selected lithium assets. Four such assets have been divested so far through sale and/or option agreements with publicly listed companies. These transactions, assuming the existing options are exercised, may generate up to an estimated US$5.1 million in cash and stock-based consideration, in addition to future royalty payments for Chariot. The company currently has four additional projects that may be potential divestment opportunities, including Lida and Amargosa (Nevada), Mardabilla (Western Australia) and Nyamukono (Zimbabwe).
The company believes its two core projects, Black Mountain and Resurgent, represent early, prospective lithium opportunities in the United States. Chariot has received and completed the necessary approvals and preparations for drilling and has now commenced the phase 1 diamond drill program at the Black Mountain Project. This program was developed following highly encouraging assay results from the 22 rock chip samples collected to date at Black Mountain, which returned assay results of up to 6.68 percent lithium oxide. Eight holes were drilled and the first three holes intersected high-grade spodumene mineralisation which confirmed potential of the Black Mountain LCT pegmatite swarms. Assay results for the subsequent five holes are pending and expected to be announced by April 2024. Chariot plans to conduct a phase 2 drilling program beginning in Q2 2024.
Following the AU$9-million IPO, Chariot now has nearly AU$11.2 million available cash, which is sufficient to fund its exploration activities for the next 24 months. Of the AU$11.2 million, nearly 43 percent or AU$4.8 million will be spent on the Black Mountain Project.
Concurrently, the company plans to continue early exploration activities at the Copper Mountain Project, South Pass, Wyoming Regional and the Resurgent Project to define targets for future drilling.
Chariot boasts a world-class team with strong track records in mining, exploration and the financial services sectors. The management has significant corporate and investment banking experience. Non-executive chairman Murray Bleach was formerly the CEO of Macquarie in North America, while the CEO, Shanthar Pathmanathan was an oil and has investment banker with Macquarie and Deutsche Bank. On the geological side, Neil Stuart who is a non-executive director is a lithium industry veteran having previously founded Orocobre Ltd (which later merged with Galaxy Resources) to form Allkem Ltd, one of the largest lithium producers in the world. The exploration team is led by Dr. Edward Max Baker, a geologist with over 40 years of experience and several discoveries. He was the chief geologist at Newcrest Mining, MIM Holdings, Rennison Goldfields and Mount Isa Mines. The collective experience of the management team, from investment banking (with fundraising and M&A experience) to resource discoveries, will be useful in advancing the company’s core projects.
Company Highlights
- Chariot Corporation Limited is a mineral exploration company focused on discovering and developing high-grade and near-surface lithium opportunities in the U.S.
- Chariot holds the largest land position for lithium exploration in the U.S. with hard rock lithium and claystone hosted lithium exploration assets.
- The company commenced trading on the ASX in October 2023 after closing a highly sought-after and oversubscribed A$9 million initial public offering (which is in addition to A$14.8 million being raised privately to assemble the portfolio).
- It is currently focused on its two core projects in the US: (1) the Black Mountain Project, a hard rock lithium project located in Wyoming; and (2) the Resurgent Project, a claystone lithium project located in Oregon and Nevada.
- The Black Mountain Project has had two-rounds of rock chip sampling which resulted in 22 rock chip samples collected with 10 of these samples returning assay results greater than 2.00% lithium oxide (Li2O) with the highest value being 6.68 percent Li2O. The Resurgent Project has had multiple rounds of rock-chip sampling with 289 samples being collected and returning values as high as 3,865 ppm lithium. The initial surface rock-chip sampling programs demonstrate the presence of lithium mineralization at surface.
- In addition to the core projects, Chariot holds an exploration pipeline of six projects in Wyoming including Copper Mountain, South Pass, Tin Cup, Barlow Gap, Pathfinder and JC projects. These projects are prospective for hard rock lithium.
- The company’s portfolio includes several additional projects prospective for hard rock (Western Australia and Zimbabwe) and claystone lithium (Nevada, USA).
- Chariot also holds interests in several projects that have been either sold or conditionally divested through option agreements to publicly listed companies. These include assets such as Halo, Horizon, Lithic & Mustang, and the Western Australia Lithium portfolio. Each of the divested projects are operated by a publicly listed counterparty and depending upon the particular transaction, the projects generate additional revenue for Chariot in the form of future payments and royalties.
- Chariot offers investors exposure to the nascent and rapidly growing U.S. lithium market.
Key Projects
Black Mountain Project, Wyoming
The Black Mountain Project is Chariot’s flagship hard rock lithium project located in Natrona County, approximately midway between Casper and Riverton, Wyoming. Chariot initially held a 91.9 percent stake in the project with 134 mining claims covering 878 hectares. In 2024, the company expanded the project with 218 contiguous claims resulting in a 206 percent increase in project tenure area. Black Mountain project now comprises 352 claims covering 2,686 hectares of tenure which subsequently increased Chariot's ownership interests in its Wyoming lithium portfolio to 93.9 percent.
The project is well-serviced by existing roads and infrastructure and comprises . The claim area was acquired via claim staking of public land administered by the US Bureau of Land Management.
The project features large spodumene-bearing pegmatites outcropping at surface. Results from the rock chip sampling program returned a best result of 6.68 percent lithium oxide from a spodumene outcrop. In a recent exploration program, 22 rock chip samples returned assays with an average result of 2.16 percent lithium oxide.
The company is conducting a 3,000-metre phase 1 drilling program at Black Mountain, which commenced in November 2023. The site preparation, necessary approvals and the earthworks required to support the drilling program have been completed.
The phase 1 drill program is designed to test the portion of the Black Mountain pegmatite dyke swarm, a target area that is 1,000 metres long by 100 metres wide. More than 22 rock chip samples were taken from this area and the assay results were highly encouraging. Of the 22 rock chip samples, eight had assay results greater than 4 percent lithium oxide, with the highest value being 6.68 percent lithium oxide from a spodumene outcrop. Chariot announced that the first three holes from the drill program delivered strong initial hard rock lithium results with multiple mineralised lithium intersections.
Black Mountain may represent a significant hard rock lithium opportunity in a tier-1 mining jurisdiction in the US. The asset features an excellent combination of geological factors, and a supportive regulatory regime and is located in a largely unpopulated part of Wyoming.
Resurgent Project, Nevada and Oregon
The Resurgent Project is a claystone-hosted lithium project located in the McDermitt Caldera in Oregon and Nevada. The company owns a 79.4 percent stake in this project. The Resurgent Project comprises 1,450 claims covering 12,128 hectares and is further subdivided into two principal claim areas, identified as ‘Resurgent North’ and ‘Resurgent East.’ Chariot has the second-largest land position in the McDermitt Caldera, which hosts two of the largest lithium mineral resources in North America, with a combined mineral resource estimate of over 40 Mt LCE - Thacker Pass at 19.1 Mt LCE and McDermitt at 21.5 Mt LCE.
The Resurgent North project targets the same sedimentary units that host Jindalee Resources' (ASX:JRL) McDermitt project with a mineral resource estimate of 21.5 Mt LCE. A surface sampling campaign at Resurgent North conducted in 2021 involving 289 samples returned values as high as 3,865 ppm lithium (over three times typical lithium claystone MRE cut-off grade). Of the 289 samples, 70 samples returned values greater than 100 ppm lithium, 20 samples returned values greater than 1,000 ppm lithium and 10 samples returned values greater than 2,000 ppm lithium.
The Resurgent East project targets the same sedimentary units that host Lithium Americas’ (NYSE:LAC) Thacker Pass lithium deposit (MRE at 19.1 Mt LCE). The similarity in geological characteristics with the two largest lithium deposits in the US further validates the potential for a large-scale high-grade lithium discovery at Resurgent.
Exploration Pipeline Projects
Besides the two core projects, the company has a pipeline of six lithium exploration projects comprising 443 claims and covering 3,585 hectares. Each of them is described below:
- Copper Mountain Project: The project is located ~80 kilometres northwest of Black Mountain in Fremont County, Wyoming. It comprises 83 mining claims covering 648 hectares. Copper Mountain has a long history of prospecting and artisanal-scale production having been historically mined for mica, feldspar, beryl, lepidolite and tantalite. The company has already identified multiple pegmatite target areas and has plans for a geochemical and ground magnetics survey in addition to geological mapping.
- South Pass Project: The project is located in Fremont County, Wyoming, and comprises 214 mining claims covering 1,750 hectares. This is a large and highly prospective project with an abundance of outcropping pegmatites that occur in swarms. The company notes the individual pegmatites at the project could range up to several hundred metres wide and several thousand metres long. There has been no prior exploration for hard rock lithium in the South Pass project area.
- Regional Wyoming Exploration Pipeline Projects: It comprises four hard rock lithium mining projects namely Tin Cup, Pathfinder, Barlow Gap and JC, comprising 146 mining claims covering 1,146 hectares.
- Barlow Gap Project: This project is located in Natrona County, Wyoming, and comprises 60 mining claims covering 501 hectares. This is an early-stage hard rock lithium exploration project with outcropping pegmatites on a northeast trend.
- Tin Cup Project: The project is located in Fremont County, Wyoming, and comprises 45 mining claims covering 376 hectares. There is a long history of exploration at The Tin Cup mining district dating back to 1907. The region has been known for small-scale mining for gold, copper and various gemstones including red jasper, ruby and jade. This is an early-stage hard rock lithium exploration project with outcropping pegmatites.
- Pathfinder Project: This is an early-stage hard rock lithium project located in Natrona County, and comprises 32 mining claims covering 234 hectares.
- JC Project: Located in Fremont County, Wyoming, the project comprises nine mining claim blocks spanning 75 hectares. This is an early-stage hard rock lithium exploration project that features several small excavation pits and outcropping pegmatite dykes.
Divestment Projects
In addition to exploration-led initiatives, Chariot has been actively focused on creating value via divestment of selected lithium assets in its portfolio. In total, four such assets – Halo (Chariot’s ownership 21.4 percent), Horizon (Chariot’s ownership 21.4 percent), Lithic & Mustang (ownership 21.4 percent) and WA Lithium portfolio (Chariot was the 100 percent owner of this property prior to the sale to St George Mining Ltd) - have been divested so far through option agreements to publicly listed companies. These transactions, if the options are exercised, may generate up to an estimated US$5.1 million in gross proceeds (cash and stock-based consideration) for Chariot in addition to future royalty payments.
a) Halo asset: Sold to POWR Lithium for a total consideration of ~US$2.5 million and 1 percent NSR.
b) Horizon asset: Sold to Pan American Energy for a total consideration of US$15 million.
c) Lithic and Mustang assets: Sold to Red Mountain Mining for a total consideration of ~US$1.7 million and 2 percent NSR.
d) WA Lithium portfolio: Sold to St George Mining for a total consideration of ~US$1.1 million and 2 percent NSR.
Moreover, the company has identified four more projects for divestment: Lida Project (Nevada), Amargosa Project (Nevada), Nyamukono Project (Zimbabwe), and Mardabilla Project (Western Australia).
Management Team
Shanthar Pathmanathan – Managing Director
Shanthar Pathmanathan has 14 years of investment banking experience in the metals and mining, oil and gas and chemicals sectors. Prior to Chariot, he was the CEO and managing director of Lithium Consolidated, an ASX-listed company, which had one of the largest portfolios of hard rock lithium exploration assets, globally. Before that, he held various investment roles with Deutsche Bank and Macquarie Group. He has a Bachelor of Laws from the University of Western Australia.
Frederick Forni – Executive Director
Frederick Forni is a senior finance professional with over 25 years of investment banking experience. He was a former senior managing director of Macquarie Holdings (USA) and held non-executive director roles with numerous Macquarie Group entities and GLI Finance Ltd. He holds a B.A. in economics from Connecticut College, a J.D., awarded cum laude, from Georgetown University Law Center and an LL.M. in taxation from New York University Law School.
Neil Stuart – Non-executive Director
Neil Stuart is an exploration geologist with over 40 years' of experience and is a member of The Australian Institute of Geoscientists and a Fellow of The Australasian Institute of Mining and Metallurgy. He was a founding director of Orocobre Limited, now Alkem (ASX: AKE). He has considerable experience across several commodities and was heavily involved in project delineation and acquisition in Australia, Mexico and Argentina. Over the last 20 years, he was involved with the exploration and commercial development of lithium projects. Stuart is on the board of numerous ASX-listed companies and is a graduate of the University of Melbourne (BSc.) and James Cook University (MSc.).
Dr. Edward Max Baker – Geological Consultant
Dr. Edward Max Baker is a Ph.D. geologist and a fellow of AusIMM. Baker has over 40 years of experience and has made several discoveries. Baker was chief geologist for Newcrest Mining, MIM Holdings, Rennison Goldfields and Mount Isa Mines. Baker was co-founder and previously a vice-president of exploration at New York Stock Exchange-listed Integra Resources (NYSE:ITRG).
Ramesh Chakrapani – Chief Strategy Officer
Ramesh Chakrapani has over 20 years of experience in the investment banking and alternative asset investing space. Of which, over 15 years were spent at The Blackstone Group where he was a managing director and a member of the Hedge Fund Solutions Special Situations Investing Group. Chakrapani has invested across a diverse set of industries, asset classes, geographies and liquidity profiles, and has represented The Blackstone Group on the boards of selected investments. He has a B.A. from Yale University.
This article was written in collaboration with Couloir Capital.
DLE Pilot Plant First Stage Production Completed, Downstream Process Optimised with Sample of Battery-Grade Lithium Produced
Highlights:
- An initial volume of 88m3 of concentrated eluate, which is the lithium carbonate equivalent (LCE) of approx. one tonne, has been produced from the Company´s DLE pilot plant in Copiapó, Chile over an operating period of 384 hours with 14 cycles completed
- This completes the first stage of production from the DLE pilot plant
- Results show the DLE adsorbent achieved a lithium recovery rate of approximately 95% from the brine, with total recovery (adsorption plus desorption) achieving approximately 88%
- Impurity rejection rates were very high producing a low impurity eluate conducive to the downstream conversion process.
- The concentrated eluate is being shipped in four batches to the facilities of Conductive Energy in Chicago, USA, for conversion into battery grade lithium carbonate
Shipment | Eluate Volume | Eluate Li Grade | LCE (kg) | Shipment Status |
1 | 24m3 | 2008 mg/L | 257 | Arrived process facility |
2 | 24m3 | 2360 mg/L | 301 | In Shipment |
3 | 24m3 | 2325 mg/L | 297 | In shipment |
4 | 17.5m3 | 2464 mg/L | 230 | At departure port |
Targeted | 90m3 | 2000 mg/L | 1022 | |
Total Achieved | 88m3 | 2289 mg/L | 1085 |
Table 1: Status of concentrated eluate from pilot plant first stage production
- Conductive Energy completed test-work on a 200L sample of concentrated eluate shipped in May 2024 to optimise the downstream process before receiving the larger volume shipments
- The conversion test-work produced multiple samples of lithium carbonate with 99.75% lithium carbonate purity demonstrating that the process achieves targets and is repeatable
- The result is a first confirmation that a process has been developed that will efficiently produce battery-grade lithium for the Laguna Verde project from pilot scale DLE eluate
- CleanTech Lithium continues to be a leader in exploration and development of DLE based projects in Chile and this pilot scale production will provide large test samples of lithium carbonate to potential offtake partners seeking product qualification.
- Subject to the completion of the re-injection well in September, the reserve report for Laguna Verde is scheduled to be completed by Montgomery and Associates in October 2024.
Steve Kesler, Executive Chairman and Interim CEO, of CleanTech Lithium PLC, said:
"We are very pleased by these results as it shows we can produce battery-grade lithium with low impurities from our Laguna Verde brine project. Working with our partners on the downstream process, Forward Water and Conductive Energy, we can now demonstrate the entire DLE process from brine to final lithium product.
"The optimised downstream process will now be applied to the initial volume of 88m3 of concentrated eluate, or approximately 1 tonne of LCE, produced from the first stage of production from our DLE pilot plant. This will produce significant test sample volumes of battery-grade lithium carbonate for commencement of testing with potential strategic partners. This is important whilst the Chilean government is reviewing the feasibility of lithium projects to identify the most advanced companies in Chile and if they are to reach their target of having three to four new lithium projects in development by 2026."
Further Information
Pilot Plant in Copiapó First Stage Production Completed
The Company´s DLE pilot plant is in Copiapó, Chile, approximately 275km from Laguna Verde. The plant finished commissioning in late March 2024 and up until mid-June a total volume of 1196m3 of brine from the Laguna Verde project was processed in the plant with a total of 14 cycles completed. Each cycle represents a volume of brine being fed first through filtration to remove suspended solids, then into DLE columns which are filled with adsorbent designed to be selective for lithium molecules. Lithium, as lithium chloride, is adsorbed from the brine, before desorption with water to create a purified lithium chloride eluate. A reverse osmosis (RO) unit at the DLE pilot plant then concentrates the eluate by extracting approximately 75% of the water to form a concentrated eluate.
Averaged across the 14 cycles, the recovery rate achieved by adsorption of lithium by the adsorbent was 95% and the recovery rate of desorption from the adsorbent was 93%. The total recovery rate averaged 88% and was highly consistent as shown in Figure 1. The temperature of the brine and desorption water, using the average ambient temperature in Copiapó during the March to June period of operation, was in the range of 20oC to 25oC, which did not significantly affect the recovery achieved.
Figure 1: Pilot Plant Total Recovery Rate
The eluate production rate was relatively stable after the initial ramp up period achieving an average of 2.8 kg LCE per hour. The design of the plant is 1 tonne per month of LCE based on designed monthly operating schedule of 360 hours. Due to budget and volume considerations, the plant was run for 384 hours for the first stage of planned operation producing a total of 1.085 tonnes of LCE as eluate. Based on the hourly production rate this met and exceeded the design capacity of the plant.
Figure 2: Pilot Plant Production Rate (Kg LCE/hr in Eluate)
Selectivity of the adsorbent is another key performance parameter for a DLE operation. DLE primarily acts as a purification stage, recovering lithium chloride from the brine whilst rejecting other impurities. For all the major ions in the brine, apart from boron, the rejection rate was very high as shown in Fig. 3 below. More cycles will further validate this performance. The quality of the eluate was consistent over the first stage of production with the low level of impurities facilitating downstream conversion.
Figure 3: DLE Performance - Rejection of Major Impurities
After completion of the DLE stage, the eluate is concentrated using a reverse osmosis (RO) unit at the pilot plant. On completion of both stages the lithium grade in the purified lithium chloride eluate is over ten times higher than the feed brine. The concentrated eluate was then loaded into a flexitank in a standard shipping container and transported to the port of Caldera for shipment to North America.
Downstream Processing into Battery Grade LithiumCarbonate: Test-work Completed
For the conversion of the concentrated lithium chloride eluate into battery grade lithium carbonate, CleanTech Lithium has engaged a leading lithium processing company, Conductive Energy, based in Alberta, Canada, which has facilities in Chicago, USA, with key downstream processing units shown in Figure 4 below. The status of the concentrated eluate shipment is shown in Table 1 with processing to commence in August 2024.
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Figure 4: Conductive Energy Carbonation Reactor Tank and Equipment for Washing, Filtering & Drying
In May 2024 CTL air-freighted a 200L sample of concentrated eluate from the pilot plant to Conductive Energy to undertake test-work to optimise the conversion process. The process steps are shown in Figure 5, involving a further stage of RO, before using Forward Osmosis (FO) to achieve a very high level of concentration. Ion exchange (IX) is used to remove calcium, magnesium, and boron. The final steps are carbonation and then washing, filtration and drying to produce a battery grade product. Conductive Energy´s approach is to simplify the process that achieves maximum yield by minimizing process steps and, where losses occur, produce fluids that are easily recycled to further maximize yield.
Figure 5: Conductive Energy Conversion Process
Reverse Osmosis and Forward Osmosis
The increase in eluate and lithium concentration in the R/O and F/O stages are shown in Table 2 below. R/O is effective for concentration until Total Dissolved Solids (TDS) reach the level of approximately 60,000 - 70,000 TDS, after which it is increasingly energy intensive and costly. F/O is highly effective in further concentration to the required lithium grade for carbonation, in this case 18,000mg Li/L (or 1.8% Lithium). The F/O unit is provided by Forward Water Technology, another Canadian company based in Ontario. F/O achieves a high concentration factor with much lower energy use than the alternative of using a mechanical evaporator, while being highly suitable for utilising solar thermal as the energy source to power the F/O process.
Parameter | Unit | Concentrated Eluate | R/O Concentrate | F/O Concentrate |
Lithium (Li) | mg/L | 2,194 | 5,700 | 18,000 |
Chloride (Cl) | mg/L | 11,039 | 37,000 | 110,000 |
Boron (B) | mg/L | 411 | 850 | 1,700 |
Calcium (Ca) | mg/L | 7 | 29 | 85 |
Magnesium (Mg) | mg/L | 14 | 50 | 150 |
Sodium (Na) | mg/L | 134 | 400 | 1,400 |
Sulphate (SO4) | mg/L | 103 | 120 | 330 |
Total Dissolve Solids (TDS) | mg/L | 19,260 | 62,000 | 190,000 |
Volume | L | 215.5 | 66.3 | 13.9 |
Reduction in Volume | % | 69.3% | 93.5% | |
Laboratory | ALS Chile | Lambton.Scientific | Lambton.Scientific |
Table 2: Results from concentration of Laguna Verde eluate through R/O followed by F/O
Ion Exchange to Remove Impurities
Ion exchange (IX) was used for removal of calcium and magnesium, which achieved 85% and 87% reductions respectively. While feed concentrations were low, 100% of barium and manganese were also removed in the same process. Additional optimization is possible with potential for further calcium removal. Lithium loss was low at 3%.
Conductive then applied its optimised IX for removal of boron. This was highly effective achieving >99.5% removal of boron. However, there was a 22% loss of lithium to the regeneration fluid. This would be recaptured by recycling the regeneration fluid to the F/O feed which was not implemented for this small-scale test-work. The lithium loss from the boron IX is expected to be reduced (recovered) to a steady state loss rate of about 3%.
Carbonation and Battery Grade Lithium Sample
The carbonation test-work achieved an exceptional yield of 96% of the theoretical maximum. The final product, after the wash procedure, was 99.75% lithium carbonate purity as shown in Table 3. Further optimisation of the washing stage is planned in order to reduce impurities to the greatest extent possible and therefore maximise the value of the battery grade product.
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Table 3: Process test-work lithium carbonate sample purity Fig. 6: Test-work sample
Additional Operations
Laguna Verde Reserve Report Update
The next stage of resource evaluation at the Laguna Verde project is to produce an updated JORC compliant resource and a reserve report based on converting a portion of resources into reserves. The management of the resource evaluation programme and reserve report is led by Montgomery and Associates, a leading hydrogeology consultant with extensive experience in resource evaluation of lithium brine projects in Chile and Argentina. Reserve estimation will feed directly into the Pre-Feasibility Study which is targeted for later this year.
The reserve calculation requires the completion of pumping tests and a re-injection well at the project which is scheduled for September 2024, when drilling equipment can be re-mobilised after the current winter break in operations. Subject to the completion of the re-injection well in September, the reserve report is scheduled to be completed by Montgomery and Associates in October 2024.
Competent Persons
The following professional acts as qualified person, as defined in the AIM Note for Mining, Oil and Gas Companies (June 2009) and JORC Code (2012):
Marcelo Bravo: Chemical Engineer (Universidad Católica del Norte), has a Master's Degree in Engineering Sciences major in Mineral Processing, Universidad de Antofagasta. He currently works as a Senior Process Consulting Engineer at the Ad-Infinitum company. Mr Bravo has relevant experience in researching and developing potassium, lithium carbonate, and solar evapo-concentration design processes in Chile, Argentina, and Bolivia. Mr Bravo, who has reviewed and approved the information contained in the chapters relevant to his expertise contained in this announcement, is registered with No. 412 in the public registry of Competent Persons in Mining Resources and Reserves per the Law of Persons Competent and its Regulations in force in Chile. Mr Bravo has sufficient experience relevant to the metallurgical tests and the type of subsequent processing of the extracted brines under consideration and to the activity being carried out to qualify as a competent person, as defined in the JORC Code. Mr Bravo consents to the inclusion in the press release of the matters based on his information in the form and context in which it appears.
The information communicated within this announcement is deemed to constitute inside information as stipulated under the Market Abuse Regulations (EU) No 596/2014 which is part of UK law by virtue of the European Union (Withdrawal) Act 2018. Upon publication of this announcement, this inside information is now considered to be in the public domain. The person who arranged for the release of this announcement on behalf of the Company was Gordon Stein, Director and CFO.
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