Tag Archives: Praseodymium

E-Tech evaluating Novamera’s surgical mining technologies for Eureka project

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E-Tech Resources Inc has signed a Memorandum of Understanding (MoU) with Novamera Inc to evaluate the use of surgical mining and Novamera’s technologies as the extraction method for its Eureka project in Namibia.

The MoU sets out a series of milestones that include a conceptual surgical mining economic desktop evaluation (commencing immediately), Guidance Tool calibration activities and a bulk sample. The parties are planning to initiate these activities over the next 12 months.

The solution could provide a more cost-effective and faster path to production, while also radically reducing environmental and social impact, E-Tech says. It aligns well with E-Tech’s values of being a sustainable and responsible company with the goal of supporting the green energy transition.

The Eureka project focuses on two rare earth elements (REEs), neodymium and praseodymium. The project’s mineralogy, processability and favourable logistics have the potential to make it one of the simplest and most accessible sources of REE supply to the global market, according to the company.

Todd Burlingame, E-Tech CEO, said: “E-Tech is advancing the development of the Eureka deposit by utilising innovative and leading-edge technology. The minerals of the future will require techniques and approaches that are in line with the ESG principles of their end use. We believe that Novamera’s technologies are revolutionary and E-Tech is thrilled to be at the forefront of exploring new mining methods.

“We are committed to finding sustainable and cost-efficient ways to mine the materials essential for building a low carbon economy, while also protecting and preserving the environment.”

Dustin Angelo, Novamera CEO, said: “We are excited to be working with E-Tech and demonstrating the capabilities of our surgical mining technologies. Mining companies like E-Tech are looking for solutions to bring deposits into production with a smaller environmental footprint than that of conventional mining methods. The willingness to look at a different business model will open more strategic options to generate value for their shareholders and realise positive cash flow sooner for a project.”

Novamera’s proprietary hardware and software seamlessly combine with conventional drilling equipment, allowing mining companies to surgically extract deposits while minimising dilution, according to the company. Real-time data, machine learning and production analytics drive the ‘surgical mining cycle’ to make extraction of complex, narrow-vein deposits not only viable but highly profitable.

A low capital expenditure solution requiring minimal mine development, surgical mining presents miners with a flexible, scalable mining method that can help get into ore quickly with small-scale deposits, it says.

Working together with conventional drilling equipment and operations, the solution generates circa-95% less waste and less than half the greenhouse gas emissions of selective mining methods, according to Novamera. In addition, a closed-loop system is employed to minimise water discharge and real-time backfilling reduces environmental impact and tailings storage needs.

A 2021 proof of concept was designed to test the entire surgical mining system and process, which is made up of three steps. This includes drilling a hole with a standard NQ-sized diamond core rig and sending Novamera’s proprietary guidance tool down through the core barrel on wireline to image the orebody in high resolution and with close spacing; bringing in a large-diameter drill, coupled with the company’s course correction device and positioning control system, to drill to depth following the trajectory provided by the guidance tool and transporting the cuttings using reverse circulation air-lift assist; and backfilling the holes thereafter.

The latest in-field demonstration, completed in late 2022, took place in Baie Verte, Newfoundland, at the same Signal Gold-owned site (the Romeo and Juliet deposit). The trial highlighted the technical capabilities of the guidance tool, the operational impact of real-time data in a production setting and the economic potential of surgical mining, according to Novamera.

Carried out under the auspices of the Canada Mining Innovation Council (CMIC), the demonstration highlighted to the sponsors – OZ Minerals, Vale and an unnamed global gold producer among them – that the guidance tool was integral to effective surgical mining.

In terms of the next steps for the technologies, Angelo told IM back in June that the company was keen to fabricate a “course correction device” able to compensate for the impacts of gravity on drilling such holes and the rock dynamics at play, equip the drill rig with a 2-m-diameter cutting head (as opposed to the 1-m-diameter head used in the proof of concept), prove out the guidance tool at a number of sites to build up a “geological database” and then get to a full production test at a chosen mine site.

Such a mine site test was confirmed around this time after the Government of Canada announced the 24 recipients of support selected through the Mining Innovation Commercialization Accelerator (MICA) Network’s second call for proposals. Novamera was named within this select pool, with the government granting it C$850,005 ($643,984) for a project to deploy its surgical mining technologies at the Hammerdown mine site, in Newfoundland, Canada, a site owned by Maritime Resources.

Mkango, Grupa Azoty PULAWY assess potential for Polish rare earth separation plant

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Mkango Resources has joined with Grupa Azoty Zakłady Azotowe Pulawy SA to work towards development of a rare earth separation plant in Poland.

A new Polish wholly owned subsidiary of Mkango, Mkango Polska, has been established, with an experienced Country Director for Poland, Jarosław Pączek, appointed. Pączek will be joined by rare earth separation experts, Carester, and a strong team of technical advisors and engineers to help steer the collaboration.

Grupa Azoty PULAWY is part of The Grupa Azoty Group, the EU’s second largest manufacturer of nitrogen and compound fertilisers, and a major chemicals producer. Its products are exported to over 20 countries around the world, including Europe, the Americas and Asia, according to Mkango.

The parties have signed an exclusive lease option agreement for a site adjacent to Grupa Azoty PULAWY’s large-scale fertiliser and chemicals complex at Pulawy in Poland. This location is served by excellent infrastructure, access to reagents and utilities on site, and an attractive operating environment, resulting in a highly competitive operating cost position for the plant, based on scoping studies to date, Mkango says.

“Located within a Polish Special Economic Zone, the site provides excellent access to European and international markets,” it added. “Production from the plant will strengthen Europe’s security of supply for rare earths, used in electric vehicles, wind turbines and other green technology and strategic applications, and aligns with European initiatives to create more robust, diversified supply chains.”

The plant is expected to initially produce approximately 2,000 t/y of neodymium, praseodymium and/or didymium (NdPr) oxides as well as a heavy rare earth enriched carbonate, containing approximately 50 t/y dysprosium and terbium oxides. It is also expected to produce lanthanum cerium carbonate. Mkango is also evaluating marketing and processing options for the heavy rare earth enriched carbonate and lanthanum cerium carbonate.

“The plant will use best-in-class, conventional and proven technology, and will benefit from excellent rail and road infrastructure as well as the direct supply of the required processing reagents from Grupa Azoty PULAWY,” Mkango said. “It will also have access to a local skilled workforce, on-site engineering and project development expertise and R&D science institutes.”

Based on scoping studies undertaken to date, the plant is expected to have highly competitive operating costs.

Further feasibility studies will be completed by Carester, SENET (a DRA Global Group company) and a local engineering firm, Prozap, together with support from Grupa Azoty PULAWY. Mkango is also working closely with ANSTO to optimise feed specifications for the plant.

Development of the plant is expected to be underpinned by the sustainable supply of a purified mixed rare earth carbonate from Mkango’s Songwe Hill project in Malawi (pictured). Mkango will also evaluate the potential to process third-party feeds. The feasibility studies for the plant will run in parallel with those for the Songwe Hill rare earths project.

Mkango says it will also seek to maximise the renewable energy content and minimise the carbon impact of the developments in both Malawi and Poland, as part of the feasibility studies.

William Dawes, Chief Executive of Mkango, said: “Development of this plant will underline Mkango’s unique positioning in the rare earths sector. Our integrated ‘mine, refine, recycle’ strategy, encompassing sustainably sourced light (NdPr) and heavy (Dy/Tb) rare earths from Malawi and rare earth magnet (NdFeB) recycling in the UK, via our interest in HyProMag, is now enhanced by the opportunity to create a rare earths separation and downstream hub in Poland, working with one of Europe’s largest chemical and fertiliser companies.

“Rare earths are a vital component of magnets required in many technologies needed for the green energy transition. Therefore, their security of supply is becoming increasingly important to governments worldwide, especially in Europe and the US.

“We have carried out extensive due diligence on the site and believe the development of the plant in Poland will enhance the sustainable supply of rare earths into Europe, as well as bringing significant benefits to the region, creating new jobs and potential, additional, downstream developments.”

Andrzej Skwarek, Management Board Member of Grupa Azoty PULAWY, said: “We look forward to working together with Mkango on this exciting project, which complements the adjacent activities of Grupa Azoty PULAWY, benefiting from synergies in relation to reagents, by-products, utilities and infrastructure. As an industry leader in Poland, Grupa Azoty PULAWY welcomes this potential new development to the region and will continue to support Mkango as it progresses through the feasibility studies.”

Jarosław Pączek, Mkango’s Country Director for Poland, said: “This is a very exciting development for Poland at a time when Europe is focused on strengthening supply chains for critical materials and transitioning to a greener economy. The creation of a new European hub for rare earths at the heart of central Europe in Poland complements battery, electric vehicle and renewable energy developments in the region, with a site strategically located for European trade and transport routes and benefiting from plug and play access to reagents and utilities. I look forward to working with Mkango and Grupa Azoty PULAWY on this ground-breaking project for Poland and Europe.”

Hastings, TOMRA see potential for XRT ore sorting at Yangibana rare earths project

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TOMRA’s X-ray Transmission (XRT) ore sorting innovation has another positive industry reference to hand after Hastings Technology Metals said off-the-shelf technology had proven extremely effective at removing dilution on samples used in the testing program at its Yangibana rare earths project in Western Australia.

Testing on a 1.8 t sorted bulk sample had seen a 95.1% recovery of contained Nd2O3+Pr6O11 (neodymium and praseodymium), a 52% increase in head grade from 0.71% to 1.08% Nd2O3+Pr6O11, and a 37.1% mass rejection, Hastings said.

This shows XRT technology could be applied to separate out a barren waste stream from the ore, according to the ASX-listed company, presenting an opportunity to remove waste dilution material from the mining process before the material is fed into the processing plant – resulting in energy and reagent savings in the beneficiation circuit.

The testing involved the crushed bulk ore sample of 1.8 t being screened into two size fractions (10.5 mm) and (plus-10.5mm), with the sortable fraction (plus-10.5 mm)after being diluted with waste material at either 35% or 60% proportions screened on a TOMRA commercial sorter using XRT technology at 32 t/h feed rate.

In the base case, sorted ore samples, crushed and screened to plus-10.5 mm and diluted with 35% waste material, a total of 37.1% of the sample mass was rejected at a grade of 0.09%Nd2O3+Pr6O11, representing a loss of Nd2O3+Pr6O11 of just 4.9%, or an overall recovery of 95.1%Nd2O3+Pr6O11 in the ore. A corresponding 52% increase or upgrade in the ore head grade was achieved from 0.71% to 1.08% Nd2O3+Pr6O11.

In the sorted sample diluted with 60% waste material, the ore sorting test work program achieved an upgrade factor of 2.16 taking the feed grade from 0.43% Nd2O3+Pr6O11 to 0.93%Nd2O3+Pr6O11, while recovering 90.6% of the Nd2O3+Pr6O11, the company said.

Hasting said: “The full opportunity for including ore sorting technology into the Yangibana process flowsheet is still being assessed. Based on these test work results, technical and engineering programs will continue to investigate the benefits that can be realised across the project.”

The proposed beneficiation and hydro metallurgy processing plant at Yangibana will treat rare earths deposits, predominantly monazite, hosting high neodymium and praseodymium contents to produce a mixed rare earths carbonate that will be further refined into individual rare earth oxides at processing plants overseas, according to Hastings.

A definitive feasibility study in 2017, based on a 5.15 Mt reserve, detailed a production rate of 1 Mt/y to produce up to 15,000 t/y of mixed rare earths carbonate at Yangibana.

Wood Group receives Pensana Metals Longonjo rare earth PFS gig

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Following the recent mineral resource upgrade at the Longonjo NdPr project in Angola, Pensana Metals says it has appointed international engineering company Wood Group to execute a prefeasibility study (PFS) for expedited development of the asset.

The study will focus on the delivery of a low capital cost open-pit mining operation and exporting flotation concentrates to customers in China, via the recently upgraded Benguela rail line and the Atlantic deep‐water port of Lobito, Pensana said.

Discussions with potential financiers have commenced and it is expected that a financing package will be finalised to coincide with the completion of the PFS (scheduled for September 2019), according to the company.

Pensana said the company was of the view that, given the work that has been completed to date and the relative simplicity of the operation, it should be possible, after the PFS publication, to move immediately to a front-end engineering design contract and, then, secure an engineering procurement construction and management agreement.

Pensana Metals Chief Operating Officer, Dave Hammond, said: “The development concept is very straight forward. We are looking at a low capital cost, shallow open-pit and flotation operation producing a high-grade concentrate for export to China via the adjacent major rail and port infrastructure.

“Last month’s substantially increased mineral resource estimate has enabled us to bring forward the PFS.” This saw the company declare an inferred resource of 240 Mt at 1.60% rare earth oxides (REO), including 0.35% NdPr for 3.85 Mt of REO including 840,000 t of NdPr.

Wood Group previously undertook the scoping study for Longonjo and has an experienced rare earth mining and development team, according to Pensana.

Studies that will be part of the PFS include additional drilling, optimisation of the flotation process and comminution testwork, mining optimisation studies, a revised mineral resource estimate and detailed cost studies based on engineering design work.