Tag Archives: Vale

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.

Vale and Port of Açu sign HBI Mega Hub MoU

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Vale says it has signed a MoU with the Port of Açu to study the development of a Mega Hub at the port located in São João da Barra in the state of Rio de Janeiro, Brazil, to produce HBI (hot briquetted iron) using the direct reduction route.

The Mega Hub will initially receive pellets from Vale and could, in the future, include an iron ore briquette plant at site to supply the direct reduction route at the industrial complex.

According to the agreement, both companies will seek to attract investors and clients to build and operate the direct reduction plant using natural gas which will be available at the port, with the possibility of eventually converting to green hydrogen, producing HBI with near-zero carbon emissions.

It is a pioneering initiative that considers a technical study coordinated by the Port of Açu and sectorial academics which proposes the use of HBI as partial burden in blast furnaces, reducing greenhouse gas emissions and increasing steelmaking productivity without needing to substitute existing assets, such as the blast-furnaces and steelworks. Currently, HBI is mostly used in electric arc furnaces. Using HBI in this type of furnace will enable a smoother decarbonisation process for the Brazilian steelmaking industry.

The agreement with the Port of Açu marks another step in the development of Mega Hubs in Brazil. Mega Hubs are industrial complexes designed to produce low-carbon steel products and Vale has already begun implanting such hubs in three countries in the Middle East (Saudi Arabia, UAE and Oman).

Marcello Spinelli, Executive VP of Iron Ore Solutions, said: “We believe that Brazil has great potential to be a hub for low-carbon steelmaking. We have high-quality iron ore, abundant natural gas reserves and the potential to develop green hydrogen. As a Brazilian company, Vale seeks to partner with ventures that contribute in this direction. We want to be the driving force behind Brazil’s ‘neo-industrialisation’, which will be based on green industry.”

José Firmo, CEO of the Port of Açu, said: “The signing of this partnership demonstrates the full industrialisation potential of the Port of Açu, confirming its vocation as the port of energy transition in Brazil. We believe that the Port of Açu, with its unique port infrastructure in the country, strategic location and potential for the most competitive Brazilian natural gas prices, brings together unique characteristics to, together with Vale, contribute to the decarbonisation of the domestic and international steel industry.”

Albano Vieira, Consultant for steel and mining issues at Prumo, the holding company that develops the Port of Açu, said: “Brazil is one of the most important iron ore and steel producers in the world and Vale is a leading player in this market. The use of HBI in blast furnaces can reduce greenhouse gas emissions by around 25%, with even greater potential reductions along the chain, which would put the industry in line with the goals of reducing emissions by 2030. With the Port of Açu as the gateway to zero-carbon industrialisation projects, all the conditions and analyses point to the country becoming a major producer of HBI, supplying steel mills all over the world.”

Vale and Vivo extend reach of 4G across Carajás Railroad

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Vale has started to implement, in partnership with Vivo, an unprecedented technology infrastructure to extend the reach of the 4G internet signal along the Carajás Railroad, which connects the states of Maranhão and Pará, covering 28 cities in Brazil.

The initiative includes the installation of 49 new telephone towers and the activation of the signal on another 27 towers already installed, as well as the acquisition and installation of new equipment. The investment, worth around BRL240 million ($50 million), should be completed by 2025 and will benefit communities close to the railroad and the railroad operation, as well as improving connectivity on the Passenger Train.

Eduardo Bartolomeo, Vale’s CEO, said: “This initiative is in line with our commitment to invest in projects of shared value with society. It meets not only Vale’s needs – modernizing the technology used to exchange data during the movement of trains – but also those of the communities, with the provision of a 4G signal along the entire route of the Carajás Railroad, and also the users of the Passenger Train, improving connectivity during the journey.”

Alex Salgado, VP of Business at Vivo, said: “Our private network project plays a leading role in the materialisation of initiatives that accelerate industrial digitalisation, leveraging technologies such as IoT, big data, artificial intelligence and analytics within the operation, transforming data into intelligence, ensuring greater safety, cost reduction and efficiency gains. And in addition to technological advances within Vale’s railroad operation, the companies will go further and share with the population the benefits of excellent connectivity in all the municipalities close to the railroad.”

The new 4G-based private network infrastructure will bring more security and efficiency to the operation of the Carajás Railroad, which is already considered the safest railroad in Brazil by the National Land Transport Agency, Vale says. All communication on the railroad will be changed from analogue to digital, speeding up access to data generated by the trains and making it possible to implement even more innovative systems in the future.

The railroad will have real-time video transmission, giving the driver greater visibility of what is happening on all sections of the track. Information generated by telemetry on the train’s performance will also be available in real time along the entire length of the railroad. In addition, cell phone communication between employees will be more stable.

The investment in the railroad is part of an initiative started in 2019, when Vale signed the first contract with Vivo to install a private 4G network in its operations.

Paulo Pires, Chief Technology Officer, said: “Since 2019, this network has already been deployed in Carajás, where it enables the operation of 22 pieces of autonomous equipment, including haul trucks and drilling rigs, and in Itabira, where it supports dam monitoring.”

A significant social impact of this technology project is the provision of free internet access points along the railroad, in high-traffic locations such as hospitals, schools and community centers. Vale’s teams have already started dialoguing with leaders and representatives of public authorities to determine which locations will benefit. There will be around 280 access points.

In addition, by the end of 2024, all 15 passenger stations along the Carajás Railroad will have a free internet signal for users.

First of its kind Net Zero Standard devised for diversified mining sector

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Climate Action 100+, which calls itself the world’s largest investor engagement initiative on climate change, has released a first of its kind “Net Zero Standard” for diversified mining companies such as Anglo American, BHP, Glencore, Rio Tinto, South32, Teck Resources and Vale.

The new standard aims to help investors assess the progress of diversified mining companies as they move towards net zero, providing them with robust tools to independently and consistently assess these companies’ transition plans, in order to understand their transition risk and support their engagement efforts.

Designed to complement the sector-neutral Climate Action 100+ Net Zero Company Benchmark, the standard will provide a transparent, systematic and evidence-backed engagement tool, giving Climate Action 100+ signatories and the wider investor landscape the metrics most specific to this important, but complex, sector, the organisation says.

“The Net Zero Standard for Diversified Mining reflects the outcome of extensive consultation with investors, mining companies themselves and other key stakeholders,” it said, adding that a final consultation on a draft of the standard was conducted in the June quarter before the final release.

As part of this development, the organisation has devised a set of metrics that diversified mining companies engaged with under Climate Action 100+ will be assessed against, and the scoring methodology that will be used. These metrics are additional to the Climate Action 100+ Net Zero Company Benchmark.

Additionally, a document called Investor Expectations for Diversified Mining has been published that, the organisation says, fleshes out the standard with background and rationale behind the metrics found in the standard itself.

The metrics laid out in both documents will now be piloted by assessing selected miners with the objective of testing their practicality. Feedback from these pilots will be used to further refine the metrics into a final list, with which it is expected public assessments will be made. These assessment results (as well as the narrative and context provided in the Investor Expectations) will bring impactful insights to engagement conversations, the organisation says.

The list of Climate Action 100+ companies that will be assessed with the standard include Anglo American, ANTAM, BHP, Glencore, Grupo México, Rio Tinto, South32, Teck Resources, Vale, Vedanta.

Rebecca Mikula-Wright, Chief Executive Officer, Investor Group on Climate Change, says: “The world’s leading miners are already shifting their businesses to help the world decarbonise, but some are just making claims that aren’t backed by reality. This new standard will help investors and governments separate the greenwashers from the companies that will have sustainable businesses in a net zero world.”

Laura Hillis, Church of England Pensions Board, added: “Investors often have exposure not only to the mining sector, but to many other sectors that are underpinned and enabled by mining. For example, the autos, property, steel and manufacturing sectors are highly dependent on the commodities produced by miners. By focusing on the strategic role of mining in the net zero transition, we can boost the resilience of our overall portfolio. This standard provides an ambitious but credible framework for investors and mining companies to ensure this critical sector supports a just and orderly transition to net-zero, and it raises the bar at a crucial time in this essential global economic transformation.”

Vale gears up for low-carbon iron ore briquette production in Brazil

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Vale has started load tests of its iron ore briquette plants at the Tubarão Unit in Vitória, Brazil, as part of a project it believes could eventually reduce steel industry CO2 emissions by up to 10%.

The load tests are part of the plant’s commissioning and are one of the last stages before production begins, it said.

Vale’s CEO, Eduardo Bartolomeo, said: “This is a historic moment for the steel industry. After several years of development in Brazil, we are offering an innovative product that will support our clients in the challenge of decarbonising their operations and we are meeting demands from society to fight climate change.”

The briquette is produced from the low-temperature agglomeration of high-quality iron ore using a binder technology solution, which gives the final product high mechanical strength.

Announced by Vale in 2021, the briquette has the capacity to reduce greenhouse gas emissions in steel production by up to 10% compared with the traditional blast furnace process by eliminating the carbon-intensive sintering stage. This reduction is significant when considering that the steel industry is responsible for around 8% of the world’s emissions.

The product also reduces the emission of particulates and gases such as sulphur dioxide and nitrogen oxide, as well as eliminating the use of water in its production. The briquette can also be used in the direct reduction route, replacing the pellet.

The first briquette plant in Tubarão (pictured, photo: Rafael Coelho) is scheduled to start up this year and the second plant at the beginning of 2024. They will have the capacity to produce 6 Mt/y of briquette. The two units were originally dedicated to the production of pellets and were converted for briquettes. Investment in the project amounted to $256 million and generated 2,300 jobs during construction.

Vale began developing briquettes around 20 years ago at the Ferrous Technological Center in Nova Lima (Minas Gerais). It is part of the evolution of iron ore products offered by the company throughout its history, the result of significant investments in research and innovation. Until the 1960s, the basic product was high-iron lump. As the supply of lump fell, the first pelletising plants were set up in Brazil, which allowed the use of fine ore (pellet feed) and continue to be important for the steelmaking chain. The briquette, as well as pellets, are part of Vale’s portfolio of high-quality products. The company expects to expand its production capacity to 100 Mt/y of briquettes and pellets after 2030.

The briquette is also included in Vale’s strategy to reduce its Scope 3 emissions, related to the value chain, by 15% by 2035.

The company also aims to reduce its net direct and indirect carbon emissions (Scope 1 and 2) by 33% by 2030, as a first step towards becoming a zero-carbon company by 2050. Vale has already signed more than 50 agreements with clients to offer decarbonisation solutions, which account for 35% of the company’s Scope 3 emissions. Among the proposed solutions is the construction of briquette plants co-located on the premises of some customers.

Among the agreements signed, three aim to set up “Mega Hubs” in Middle Eastern countries (Saudi Arabia, the UAE and Oman) to produce “hot-briquetted iron” (HBI), in order to supply the local and transoceanic markets, with a significant reduction in CO2 emissions. It is expected Vale will build and operate iron ore concentration and briquetting plants at the hubs, supplying the raw material for the HBI plants, which will be built and operated by investors and/or clients. Vale is also studying the creation of similar hubs in Brazil, though no location has yet been defined.

Vale hits ICMM’s GISTM target for tailings storage facilities

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Vale says it has implemented the Global Industry Standard for Tailings Management (GISTM) in 48 of its 50 tailings storage facilities (TSFs), with plans to bring the two remaining TSFs into conformance by August 2025.

The GISTM was developed after the tragic failure of a tailings facility at Brumadinho, Brazil, in 2019, through an independent process convened by ICMM, the United Nations Environment Programme and Principles for Responsible Investment.

The standard sets a high bar and contains 77 requirements integrating social, environmental, local economic and technical considerations which strive to achieve the goal of zero harm to people and the environment, according to ICMM.

Vale says of the 48 TSFs now in conformance with the GISTM, 35 are in the Iron Solutions business unit in Brazil and 13 in the Energy Transition Metals business unit (11 in Canada and 2 in Brazil).

“The two remaining Iron Solutions TSFs in Brazil have a lower consequence classification and will be in conformance with the standard by August 2025, following the criteria of the Conformance Protocols defined by ICMM,” Vale said.

The 48 TSFs in conformance meet the GISTM requirements, and some of them have action plans in place according to the Conformance Protocols, according to the company. In addition to meeting the 77 standard requirements, a TSF in conformance with the GISTM means that the oversight, monitoring and transparency of information have been and will continue to be improved, according to Vale. The focus is on the safety of people and the environment throughout the entire TSFs life cycle.

When the GISTM was published in August 2020, ICMM members committed to conform with the standard for tailings facilities classified as ‘extreme’ or ‘very high’ consequences by August 2023, and all other facilities by August 2025. Members are due to publish their progress towards conformance with the GISTM by August 5, 2023, for tailings facilities with the highest potential consequences in the event of a failure.

The ICMM said earlier this week that it anticipated some companies will not achieve full conformance with the standard’s requirements.

Implementing GISTM for Vale’s TSFs represents only one part of the company’s efforts to become safer and more sustainable, the miner says. Vale has been improving the management of its mining dams by conducting an in-depth technical analysis of the historical, current condition and performance of each structure. The preventive, corrective and monitoring actions have also been intensified, being increasingly integrated with social movements and updated according to legislation.

Vale also continues to progress de-characterisating its upstream tailings dam structures in Brazil. As of 2019, out of the 30 dams of this kind included in the program, 12 have already been de-characterised, representing 40% of the total. The program is expected to be completed in 2035. The de-characterisation of upstream facilities in Brazil is Vale’s commitment, in addition to being part of the current Brazilian federal and state legislation on dam safety.

Vale hits solar generation capacity at Sol do Cerrado energy complex in Brazil

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Vale says it has reached maximum capacity at the Sol do Cerrado solar energy complex in Brazil, one of the largest solar parks in Latin America.

The project is set to supply 16% of all the energy consumed by Vale in its operations in Brazil, in line with the company’s strategy of achieving zero CO2 emissions by 205o.

Vale reached the full installed capacity of the Sol do Cerrado project, in Jaíba, in the state of Minas Gerais, Brazil, on Tuesday (July 18). On this date, the company received authorisation from the National Electric Energy Agency (ANEEL) for the commercial operation of the last photovoltaic plant of the project, of a total of 17. The project has an installed capacity of 766 MW (peak), equivalent to the consumption of a city of 800,000 inhabitants, Vale says. Operating at full capacity, the solar complex will supply 16% of all the energy consumed by Vale in Brazil.

Sol do Cerrado, whose investments totalled around R$3 billion ($590m), is an important step in helping Vale achieve its climate goals of reducing net carbon emissions (Scope 1 and 2) by 33% by 2030 and zeroing them by 2050. The energy generated by the solar park will reduce Vale’s emissions by 134,000 t/y CO2e, which represents the emission of approximately 100,000 compact cars, according to the company. Vale also expects to reach 100% of renewable energy consumption in Brazil by 2025, and globally by 2030.

Vale began operations at Sol do Cerrado in November last year, with the start-up of four of the 17 photovoltaic plants or sub-parks of the complex, and expanded the operation over the following months, according to authorisations from the regulatory body.

The project has 1.4 million solar panels with an automatic tracking system of the sun’s movement during the day, for greater use of the sun’s rays in energy generation. Some 10.2 million metres of cables are used to conduct the energy.

Currently, Sol do Cerrado has about 100 permanent workers of various qualifications, such as electrotechnicians, electricians and general service assistants. During the implementation of the solar park, between 2021 and 2023, about 3,000 jobs were generated at the peak of activities, with almost 50% deemed to be local labour and 16% of the total jobs taken up by women.

Ludmila Nascimento, Vale’s Energy and Decarbonisation Director, said: “Over the past few months, we have been working hard on the ramp-up of the project, which went exactly as planned. We have successfully connected the 17 plants of the solar park and should already reach peak production next summer. Sol do Cerrado is a complex that brings together local development and renewable energy, contributing to our goal of being leaders in sustainable mining.”

The project also includes a 15-km-long transmission line, with a voltage of 230,000 volts, connecting the Sol do Cerrado and Jaíba collector substations, from where the energy is discharged to the National Interconnected System.

Vale and Wabtec look to decarbonise Carajás Railroad operations with battery power and ammonia

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Vale has announced a partnership with Wabtec Corporation to advance the decarbonisation of the company’s rail operations. The deal includes an order for three of Wabtec’s FLXdrive battery locomotives and a collaboration to test ammonia as a potential clean, alternative fuel to replace diesel.

The three 100% battery-powered FLXdrive locomotives will be used on the Carajás Railroad (EFC), which runs the world’s largest iron ore train consisting of 330 railcars transporting 45,000 t.

Today, three to four diesel locomotives pull the train. Once delivered, the FLXdrives will join the diesel locomotives to form Brazil’s first hybrid consist pulling the train uphill for 140 km in Açailândia, in the state of Maranhão, where fuel consumption is the highest. The FLXdrives will replace the two diesel locomotives, known as “dynamic helpers”, that are used to pull the train uphill today, Vale says.

Wabtec will build the FLXdrive locomotives at its plant in Contagem (state of Minas Gerais). The locomotives’ delivery is forecast for 2026.

Vale’s Director of Energy, Ludmila Nascimento, said: “Initially, we are maximising energy efficiency, replacing the diesel locomotives in the dynamic helper with battery ones, but the idea is that, in the future, the other locomotives on the train can be fueled by ammonia. This way, we would have a clean operation at EFC. This agreement is the first of many that we are seeking in order to accelerate the decarbonization of our railway operation.”

Vale and Wabtec will work together on a study to use ammonia as a clean alternative fuel, which does not emit CO2. The study will initially be carried out as lab tests to validate performance, emission reductions and feasibility. Among the advantages of ammonia is the fact that it allows the locomotive a longer range than other carbon-free fuels. In addition, ammonia has a high-octane rating and an established large-scale distribution infrastructure, according to Vale. The two companies will carry out the study in a laboratory over the next two years.

The FLXdrive locomotive’s energy management system recharges the batteries along the route as the train brakes.

Alexandre Silva, Manager of Vale’s Powershift Program, said: “It’s what we call regenerative energy produced by dynamic braking. Today, that energy is lost when a traditional locomotive brakes. In the downhill sections, we will be able to recharge the batteries, without having to stop the train’s operation.”

Vale introduced the Powershift Program to study alternative technologies to replace fossil fuels with clean sources in the company’s operations.

The FLXdrive locomotives are estimated to save 25 million litres of diesel per year, considering the consumption of all the railway’s trains that use the dynamic helper. These savings would reduce carbon emissions by approximately 63,000 t, the equivalent emissions of around 14,000 passenger cars per year, it says.

Danilo Miyasato, President and General Manager of Wabtec for Latin America, said: “Technological advances in battery power and alternative fuels are accelerating the decarbonisation journey for railroads. Vale’s innovative approach to adopting alternative fuels for its locomotives will benefit its customers, shareholders and communities. The FLXdrive provides Vale productivity, safety, fuel economy and emission reductions for its rail network.”

In 2020, Vale announced an investment of between $4 billion and $6 billion to reduce its direct and indirect emissions (Scope 1 and 2) by 33% by 2030. Today, Vale’s rail network represents 10% of the company’s carbon emissions. The initiative is one more step towards achieving the goal of net zero carbon emissions by 2050, in line with the ambition of the Paris Agreement to limit global warming to below 2°C by the end of the century.

The company also committed to reducing its net emissions from its value chain (Scope 3) by 15% by 2035.

Novamera plots path forward for surgical mining technologies

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Having completed a proof of concept of its entire surgical mining technologies portfolio in 2021, Novamera has furthered its credentials in the narrow-vein mining space by proving out its proprietary guidance tool in the same setting and testing out the ability to transport the concept to an underground mining environment.

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.

The 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.

Dustin Angelo, CEO of Novamera, expanded on this.

“Throughout the technology development, we have had questions or statements about the ability to carry out the type of narrow-vein mining we are talking about by simply using a large diameter drill rig to extract the orebody following a conventional resource model,” he told IM. “The typical spacing a narrow-vein orebody is drilled on – traditional cross-cutting holes associated with exploration and infill work – is too wide to get the resolution needed for an exact picture of the orebody geometry.

“What we were able to demonstrate in the latest trial is that you need a tool like ours to collect, in real time, the amount of data required to accurately extract the orebody in question.”

Novamera demonstrated this in a March webinar, which highlighted the existing infill model at the Romeo and Julie deposit implied a large-diameter drill hole could be drilled on a 62° dip angle to accurately extract the orebody.

“In actuality when we imaged the hole and used our guidance tool, it suggested the orebody was on a 67° dip angle,” Angelo said. “We validated this assessment with data and then reconciled the results to show the impact.”

The original drill hole dip angle coordinates would have resulted in only 60% of the orebody being extracted, whereas Novamera’s guidance tool-aided drilling obtained 87% of the orebody.

“At the same time, the data coming back allowed us to locate where the other 13% would be, allowing the company to pick the remainder up with the next hole,” Angelo said.

Also part of the CMIC consortium, the company brought the guidance tool to an underground mine and was able to successfully operate it in that underground environment.

“We had never been underground, so we simply wanted to show we could take the tool underground, operate it and gather data in real time,” Angelo said.

Able to break the unit down into two pieces and mount the technology in stages on the drill rig, this was a pivotal demonstration for the company, opening up further possibilities with its solution.

“Novamera’s technologies can go underground; it is the large diameter drill we are piggybacking off that has issues due to its sheer size,” Angelo said. “We are working with OEMs and contractors to augment existing large diameter drilling equipment so it can be easily deployed in the confines of an underground deposit for the surgical mining application.”

In terms of the next steps for the technologies, Angelo 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 recently confirmed 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.

This project, which has a budget of circa-C$8 million – will see the company test out its technologies on a vein located outside the current proposed open-pit mine plan, demonstrating one use case where surgical mining can help mining companies add production to supplement the conventional method being employed.

Angelo said of such testing: “When we get to this point, it is no longer about simply a proof of concept, it is about demonstrating the capabilities and value of our technologies to enable surgical mining by reconciling the grade and tonnes associated with that mining exercise against an already established resource model.

“This is where we will really generate significant interest from the mining community, when we can show that we can help mining companies add production and extend mine life from currently uneconomic, steeply-dipping narrow vein deposits or zones in their mineral resource portfolio.”

SpectraFlow NIR technology helping Vale with iron ore analysis

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Vale, one of the world’s biggest iron ore producers, has approved the SpectraFlow Crossbelt Analyzer for online measurement of iron ore material at its ports and mines, the technology provider says.

After a rigorous trial that tested the stability of the hardware and measurement accuracy of the analyser, SpectraFlow Analytics is now the chosen provider for Vale’s online iron ore analysis, it says.

Vale’s Guaíba Island Terminal (TIG) is a port that receives raw material from a large number of variable iron ore sources by train and loads the material onto ships for export. Global demand, local supply and heightening climate change and sustainability pressures necessitate stricter quality assurance and control measures from the world’s largest iron ore producer, SpectraFlow says. Also, as one of the largest logistics operators in Brazil, Vale has impetus to manage train and ship loading schedules with ever smaller margins for delay. Online analysis has the potential to address all these concerns through real time chemical and mineral analysis, according to SpectraFlow, which is providing its online near infrared (NIR) technology to the company.

Minute by minute measurements for iron and other key chemical constituents from an installed Crossbelt Analyzer were compared with sample measurements by Vale’s laboratory. Accurate moisture analysis is of particularly high importance at TIG, as there is risk of ships capsizing if the moisture levels are not strictly controlled.

“Fortunately for Vale, SpectraFlow’s online measurements of moisture and all other critical chemical constituents were found to be well within the strict delta limits set by Vale’s quality control protocol,” it said. “In fact the analyser’s measurements have already been used to eliminate unplanned stoppages at TIG, helping Vale reduce downtime and deliver value timeously. Now that the technology is proven, the SpectraFlow analyzer can also be used to blend material to reach optimum grade and gangue targets at the port and even sooner in the value chain, at Vale’s mines.”

The SpectraFlow online analyser measures dry raw material composition at key points in mining, processing and refining value chains. Usually placed over a conveyor belt, or in an airslide, the analyser can measure fine deviations in the moisture, grade or gangue composition of the material in real time. By using the measurements from the analyser that are exchanged directly with the control room PLC or from SpectraFlow’s database and monitoring user interface, bulk mineral, precious metal and cement producers can create automated control loops for quality control and assurance of their final product, the company says.

SpectraFlow’s summarised benefits of its online NIR analyser are:

  • The analyser is free of any radioactive sources, neutron generators or any hazardous components. This means the SpectraFlow analyser does not require any permits or licences regarding importation, operation or maintenance. This also means that the SpectraFlow analyser is completely safe, with maintenance able to be carried out by the plant personnel;
  • Real time, short acquisition time measurements of the complete flow of material gives the customer the opportunity to provide high resolution feed forward information to downstream processing or make value-based ore sorting control decisions on the material; and
  • The Crossbelt Analyzer reduces the need for frequent belt cuts or manual sampling of the material for quality control, and instead gives the user the user large amounts of accurate composition data for real-time feedback on upstream quality delivery like ore block control and stockpile blending.

SpectraFlow says it has installed more than 75 analysers in 28 countries worldwide.