Tag Archives: Vale

Rokion battery-powered vehicles hit new depths at Vale Creighton

As Vale continues to go deeper at its Creighton nickel mine, in Sudbury, Canada, it is adopting alternatives to its fleet of diesel-powered haulage, loading and utility vehicles in a bid to lower operating costs and improve environmental conditions for personnel that could eventually be working nearly 3 km underground.

Vale’s PowerShift strategy, part of the miner’s 2030 sustainability goals, aims to make the company’s energy matrix “clean” by focusing on the use of renewable energy and alternative fuels, greater efficiency of operations using new technologies, and forest promotion. As part of this strategy, it will test and adopt existing ‘green’ solutions as well as develop technologies with the potential for greater impact on its carbon footprint.

This has involved the use of Rokion’s battery-powered personnel carriers/utility vehicles at Creighton.

The company has been working with Rokion for close to two years after placing an order for three of its vehicles for the Creighton mine. Alongside these vehicles are other battery-powered haul trucks, loaders and production support machines supplied by the likes of Epiroc and MacLean Engineering. All these machines are being added to the fleet as the company looks to access deeper, more ventilation-constrained areas of the mine.

Todd Van Den Enden, Process Superintendent at Creighton Mine, told IM recently that the Rokion R100, R200 and R400 units had been “very well received at Creighton Mine” and the company had moved forward in purchasing more of these units to further its battery-electric vehicle development at the operation.

The units are currently used by Vale’s service groups – such as industrial mechanics, electrical and planning departments – and generally run for the entirety of a 10.5-hour shift.

The ramps at Creighton, which go from 15-20% on both the incline and decline, according to Van Den Enden, will aid the continual operation of these battery-powered machines. Equipped with lithium-iron phosphate battery technology, the Rokion units recharge their batteries on descent thanks to regenerative braking. This translates to not only a longer operating time without charge, but also greater savings per vehicle over the life of the mine, according to Rokion.

Rokion trucks can navigate mine sites with 20% grade at a full gross vehicle weight and full speed while traveling more than 70 km per charge, according to the company. This is more than enough to get through a full shift without charging.

This means the vehicles are typically only charged after the 10.5-hour shift is complete at Creighton, according to Van Den Enden. The larger R400 (pictured), which includes a six- to 12-passenger crew truck and a three- to nine-passenger utility option, has completed two shifts on a single charge during testing.

When charging is required, the Rokion units can rely on existing mine power infrastructure, with the charging procedure no different to the way people top up the charge on their Tesla vehicles, Rokion says. The company worked within the Global Mining Guidelines Groups’ BEV guidelines to design this standardised system.

Vale’s Van Den Enden said the operation of both the R100, which includes a four-passenger crew truck and two-passenger utility truck option, and the R200, which has a four-passenger crew truck and two-passenger utility truck option, has “exceeded our expectations”.

He explained: “We have roughly 1,200 hours on these units and we see advantages with the availability.”

While availability is a key selling point, Rokion says its battery-powered vehicles have been designed for simple and easy maintenance. The modular change-out options – which extend to both the battery and drive system – are “ideal for remote mining locations where the priority is to have dedicated service personnel with expertise in production mining equipment”.

Rokion explained: “A mine is not going to hire an expert in battery power when introducing a new truck such as this, so we take that aspect out of the equation, compartmentalising our battery systems into a modular form so that they can be easily switched out.”

Mine operators can visualise the operation of their vehicle assets by accessing a live fleet management system that streams data between the truck and site operations team, according to Rokion. This helps customers identify vehicles that are low on power or may need servicing. Customers also have the option of having this data routed to Rokion for additional support, the company says.

“Managing this data into useful information has become a valuable tool in helping to improve operational efficiencies for our customers,” the company said.

While there is the very real prospect of Rokion selling more units to Vale’s Creighton operation, it is also working with the miner on refining its latest R400 unit, which, it says, was engineered to be the company’s most adaptive and modular truck platform.

Van Den Enden said the R400 unit was just finishing up the testing phase with the Creighton mining department, with the machine having performed well. He said the two firms were currently working on a “minor update” for the next series of this unit.

Vale extends care and maintenance period at Voisey’s Bay

Vale says it is extending the care and maintenance period at its Voisey’s Bay mine in Labrador, Canada, by up to three months while continuing to monitor progress and events associated with the COVID-19 pandemic.

On March 16, Vale announced a four-week care and maintenance period at Voisey’s Bay due to the “unique remoteness of the area” and as a precaution to help protect the health and well-being of Nunatsiavut and Innu indigenous communities in Labrador in the face of the COVID-19 spread.

The company said, as of yesterday, no employee at Voisey’s Bay had tested positive for the virus.

The Long Harbour processing plant will continue to operate, drawing down on stockpiled concentrates to produce nickel and cobalt at forecast levels, the company said. Copper concentrate production at the site will be reduced due to the mine stoppage, with an impact of up to 6,000 t in the first half of 2020.

The company said: “Vale reaffirms its commitment to the safety of its people and the communities in which it operates and will keep investors and markets informed of future developments.”

Vale evaluating wet tailings processing alternatives at Brucutu iron ore mine

Vale says it is evaluating short-term alternatives to the wet processing of tailings at its Brucutu iron ore mine, in Brazil, as it looks to step up processing activities at the Minas Gerais operation.

The Brucutu plant, which used to dispose of tailings in the Norte/Laranjeiras dam – that has been at “emergency level 1” since December 2, 2019 – is continuing to operate at around 40% of its capacity through wet processing and tailings filtration, Vale noted.

Yet, the miner said it was evaluating “short-term alternatives” for tailings disposal, such as the optimised use of the Sul dam. These options are being tested by geotechnical and operational teams and may increase Brucutu plant’s processing capacity to 80%, Vale noted.

It warned that, if such alternatives for tailings disposal or the reclassification of the emergency level for Norte/Laranjeiras dam are not achieved until the end of the June quarter, there will “likely be an impact on the 2020 annual iron ore fines production volume”.

Vale took the decision to temporarily suspend the disposal of tailings at the Laranjeiras dam, part of the Brucutu iron ore mine, while assessing the dam’s geotechnical characteristics, back in December. During the shutdown, the dam will have the Level 1 emergency protocol adopted, Vale said. At that point, Vale put the suspension period at one-to-two months.

At the same time, the company reiterated its plans to continue to invest in dry stacking technologies to reduce its exposure to wet tailings dams.

BHP and Vale invest in COVID-19 testing and mitigation measures in Chile, Brazil

BHP and Vale have invested in measures to help mitigate the spread of the COVID-19 virus in Chile and Brazil, respectively.

While BHP has already announced COVID-19-related plans to hire more people and provide preventative measures in Australia, on top of freeing up money for to support local suppliers, it has now tabled its $8 million strategy in Chile aimed at strengthening the country’s public health network in the face of the pandemic.

It has joined with the Medical Faculty of Universidad Católica with the immediate objective of raising the testing capacity and strengthening the Familiar Health Centers of the South East Area of the Metropolitan Region, as well as Antofagasta and Tarapacá – where its majority-owned Escondida and Cerro Colorado copper operations, respectively, reside.

This plan includes:

  • An Early Detection Program through rapid testing, in support of the Primary Attention Centers (this includes 150,000 rapid tests for detecting the virus). This system includes 10 units for sampling, with mobile tents and permanent units, the company said;
  • Expansion of laboratory capacity, including the purchase of new analysis equipment to maximise the speed for processing tests. Results will be delivered to patients in 24 hours, BHP said;
  • Community surveillance for cases that test positive and their contacts, based at Primary Attention Centers and telemedicine; and
  • A 24/7 call centre for identifying potential cases.

Daniel Malchuk, President Operations at Minerals Americas, said: “This plan shows our commitment and our profound belief that we should work together to face the difficult times we are going through.”

In addition, BHP will implement a program to support communities and high-risk vulnerable groups in the regions where the company operates, Antofagasta and Tarapacá. This will allow the delivery of supplies, sanitisation of public areas, areas for the isolation of potential cases and support to the state network to increase medical rounds, supplies and treatment for high-risk people, it said.

BHP previously changed the terms of payment for all providers and collaborators in Chile, with large taxpayers cut to 30 days, small and medium enterprises reduced to 14 days and local companies from the Antofagasta and Tarapacá Regions having their terms cut to seven days.

Vale, meanwhile, said its China subsidiary had recently taken delivery of the first batch of 5 million rapid test kits to diagnose COVID-19.

The tests, which can provide results in just 15 minutes, were purchased from China and will be delivered to the Brazilian government, it said. Produced by the Chinese company Wondfo, the test is registered at the National Health Surveillance Agency (Anvisa, Agência Nacional de Vigilância Sanitária) and was donated by Vale to help the Brazil Government fight the spread of the virus in the country.

Some 500,000 units are currently in transit (by plane) from Guangzhou Baiyun International Airport, in the Chinese province of Guangdong, on their way to the International Airport of Guarulhos (São Paulo). They are expected to arrive in Brazil this evening.

Vale’s CEO, Eduardo Bartolomeo, said: “Vale offers this support to the Brazilian society at this time when the country is united for the health and safety of people. We are using our logistics network from Asia to bring inputs that can make a difference in people’s lives in Brazil.”

The remaining 4.5 million units will be delivered by the supplier in April, Vale said.

The amount of test kits purchased by Vale represents half of the needs estimated by the Brazilian Ministry of Health as of March 22, it explained.

Vale to ramp down Voisey’s Bay nickel mine for a month

Vale has become the latest miner to react to the COVID-19 virus outbreak, saying it has taken the decision to ramp down its Voisey’s Bay nickel mining operation, in Canada, and place it on care and maintenance for a period of four weeks.

The move is a precaution to help protect the health and wellbeing of Nunatsiavut and Innu indigenous communities in Labrador in the face of the COVID-19 pandemic, the company said. This is all part of the company’s plans to safeguard its employees, businesses and communities surrounding its operations from the threats posed by the outbreak.

Other miners such as Newmont, Anglo American and Rio Tinto have also reacted to the virus outbreak by either slowing down development projects (Oyu Tolgoi Underground and Quellaveco) or ramping down existing mines (Yanacocha).

Vale said: “Although none of our employees has tested positive for coronavirus at any of Vale’s global operations, Vale has taken this preventive action because of the unique remoteness of that area, with fly-in and fly-out operations, with higher exposure to travel.”

The company said it will work together with the communities and authorities to ensure its operations do not act as a “catalyst to inadvertently introduce the virus in these communities”.

Operations at Vale’s open-pit mine and concentrator at Voisey’s Bay in Labrador began in 2005. This 6,000 t/d facility produces two types of concentrate: nickel-cobalt-copper concentrate and copper concentrate. Nickel concentrate produced at Voisey’s Bay is currently processed at the hydrometallurgical processing facility in Long Harbour, Newfoundland.

While the mining operation will shut down, the Long Harbour Processing Plant (LHPP) will continue to operate, Vale said. Nickel and cobalt production should not be affected given the availability of stockpiled concentrates to feed the LHPP well past the four-week care and maintenance period, but copper concentrate production at site will be reduced proportionally in line with the period of the mine stoppage (Voisey’s Bay produced 25,000 t of copper concentrate in 2019), it said. The decision also impacts on the Voisey’s Bay Mine Expansion project, which is currently underway to transition to underground operations.

Vale also said that, due to travel and equipment transportation restrictions as a result of the COVID-19 outbreak, it is revisiting its plans for the Mozambique coal processing plants stoppage. The halting of operations was previously expected to start in the June quarter of this year, with a new date under evaluation. This could ultimately affect coal production guidance for 2020, it said.

Due to the outbreak, the great majority of Vale’s and third-party employees based in its corporate offices are, from today, working from home. “The measure aims to safeguard our employees, reducing the number of people in the same workspace and the exposure to public spaces, such as buses, subways and elevators,” it said.

Vale to build New Steel plant and boost dry iron ore processing aims

Vale says it plans to invest up to $100 million to build an industrial plant for dry magnetic concentration of low-grade iron ore, bolstering its efforts to eradicate wet tailings facilities at its mines.

The technology, known as FDMS (fines dry magnetic separation), is unique, Vale says, and has been developed by New Steel – a company it acquired in late 2018.

The capacity of the plant, which is expected to be installed in Minas Gerais, will be 1.5 Mt/y, with the project due to start up by 2022. Vale estimates that, in 2024, 1% of all the company’s production will use this technology, whose patent is already recognised in 59 countries.

With New Steel, Vale estimates that, in 2024, 70% of production will come from dry or natural moisture processing, without adding water to the process and without using tailings dams. Today, the company produces 60% of its iron ore using natural moisture processing. Of the remaining 30% of production using wet processing, 16% will have filtered and dry-stacked tailings, it said.

By this point, only 14% will continue using the conventional method, with wet concentration and tailings disposal in dams or deactivated extraction sites, compared with 40% of current production. The investment is all part of Vale’s $1.8 billion filtering and dry stacking plan, which it laid out in 2019.

The first units to use the FDMS technique will be the Vargem Grande complex (in Nova Lima), Pico, Cauê and Conceição mines (in Itabira), and Brucutu mine (in São Gonçalo do Rio Abaixo).
According to the President of New Steel, Ivan Montenegro, a pilot plant for FDMS will start operating at the Ferrous Metals Technology Center (CTF, Centro de Tecnologia de Ferrosos), in Nova Lima (Minas Gerais) in the June quarter, with the investment amounting to almost $3 million. The unit will be able to concentrate 30 t/h of dry ore, using magnetic separation technology with rare earth magnets.

“Through this process, New Steel can deliver a concentrate with iron content up to 68%, from poor ore with content up to 40%, depending on its chemical and mineralogical composition,” Vale said. “Currently, this concentration is produced by the method known as flotation, which uses water. In flotation, the tailings are usually disposed of in dams. With the dry concentration technology developed by New Steel, the tailings will be stacked.”

Vale said it is already studying methods to use these dry stack tailings as an input for the civil construction industry, in addition to other initiatives, such as co-products.

The pilot project at CTF is the second carried out by Vale. Between 2015 and 2017, a similar plant was successfully operated at Fábrica mine, in Minas Gerais, it said. These results were essential for Vale to see the potential of FDMS, according to Montenegro. “The technology, however, has been tested since 2013. At the time, the equipment allowed a concentration of 5 t/h, rising to 15 t/h in 2015 and up to 30 t/h in 2017,” it said.

To be aligned with Vale’s future projects, the company is working on the development of large-capacity magnetic separators of up to 100 t/h.

According to Technical Director of New Steel, Mauro Yamamoto, more than 10,000 test samples of ore from the Iron Quadrangle region of Minas Gerais have already been analysed by the company. Yamamoto points out that, today, with technology, 90% of the iron ore from a low-content deposit can be efficiently recovered.

Currently, New Steel seeks to reduce operating costs by using industrial microwaves to dry the product. It aims to replace natural gas dryers, thereby cutting energy costs in half. “It is a sustainable process, but we have the challenge of making it more competitive,” Montenegro said.

Vale’s Director of Ferrous Metals Value Chain, Vagner Loyola, said the company has been developing technology to increase dry processing for years. Over the last decade, Vale invested almost $17.8 billion to deploy and expand the dry – or natural moisture – processing of the iron ore produced in Brazil. Over the next five years, it estimates it will invest $3.1 billion in similar processing facilities to achieve the goal of 70% dry production.

In Pará, almost 80% of production already uses this technology in Vale’s North System. The main plant in Carajás, Plant 1, is being converted to use natural moisture processing; from its 17 processing lines, 11 already use dry processing and the remaining six wet processing lines will be converted by 2023.

The treatment plants at Serra Leste (in Curionópolis) and the S11D complex (in Canaã dos Carajás) do not use water to treat the ore. At the S11D complex, for example, the use of the natural moisture processing route allows water consumption to be reduced by 93% when compared with the conventional method of iron ore production.

In Minas Gerais, dry processing was expanded from 20% in 2016 to 32% in 2019. Today, this type of processing is used by several units, such as Brucutu, Alegria, Fábrica Nova, Fazendão, Abóboras, Mutuca, and Pico. “In Minas Gerais operations, all the units that could be converted to dry processing production are already in operation,” Loyola explains. “Then, we are using tailings filtering and stacking as well as the dry concentration technology from New Steel to reduce the use of dams.”

Dry processing is associated with the quality of the iron ore from the mine face. In Carajás, as the iron content is already high (above 65% Fe), the material is only crushed and screened to be classified by size (granulometry). In some mines of Minas Gerais, the average content is 40% Fe in itabirite. To increase its grade, the ore is concentrated through processing with water and the tailings are disposed of in dams. Then, the high-grade ore resulting from this process can be transformed into pellets at the pelletising plants to increase the added value of the product.

The plants that use dry processing in Minas Gerais depend on the availability of high-grade ore – around 60% – that can be found in some mines of the state. To achieve the required quality and be included in Vale’s product portfolio, this ore must be blended with the ore from Carajás – this blending is carried out at Vale’s Distribution Centers in China and Malaysia.

ICMM’s Butler talks tailings on anniversary of Brumadinho collapse

One year on from the Brumadinho dam collapse, ICMM CEO, Tom Butler, says the mining industry may have made progress with how it operates, but it still has much more to do to on the environmental, social and governance front.

The collapse, which reportedly killed 270 people, was attributed to poor internal drainage and intense rain among other factors, Vale said back in December.

In a statement, he said: “The dam collapse at Vale’s Corrego do Feijão mine in Brumadinho, Brazil, on January 25, 2019, was a human and environmental tragedy. One year on, we remember the victims of this catastrophic event and our thoughts are with those who have lost loved ones.

“The anniversary is a stark reminder that, while the mining and metals industry has come a long way in improving how it operates, there is still much more to do to safeguard lives, improve its environmental performance and demonstrate transparency.

“Shortly after the disaster, in an effort to drive change and establish best practice, the International Council on Mining and Metals (ICMM), United Nations Environment Programme (UNEP) and Principles for Responsible Investment (PRI) co-convened the Global Tailings Review to establish an international standard for the safer management of tailings storage facilities. The Global Tailings Standard, once endorsed by all three co-conveners, will be published later this year. The standard will become a commitment of ICMM membership and we will encourage others to join us in advocating for it to be adopted more broadly across the industry.

“In addition, ICMM is taking action by working in partnership – with technology providers, experts and researchers – to promote innovation in the monitoring and surveillance of tailings storage facilities and the development of alternative methods of mineral recovery to significantly reduce or eliminate the generation of tailings.”

Vale looks to smart meters for power cost, GHG emission reductions

To reduce operating costs and greenhouse gas emissions, Vale is investing BRL20 million ($4.9 million) into the implementation of a smart energy management system to improve equipment performance and process automation across its production chain – from mine to port.

The system, known as SmartEnergy, should lead to the installation, by 2021, of 2,000 intelligent electric power meters at 57 of the company’s operating units and large equipment in Brazil – for example, in ore grinding circuits, long-distance conveyor belt systems and pumping systems.

The smart meters reduce production losses through continuous evaluation of the quality of power and identification of the causes of failures in power supply. Tests using this technology in two mines have saved BRL90 million per year, according to Vale, eliminating equipment shutdowns due to incorrect activation of the “electrical protective system”.

According to Vale’s Energy Efficiency Project Coordinator, Renato Arantes, smart meters can accurately detect voltage and electric current variations. These meters also register the power consumption and submit data to SmartEnergy, which enables interactions with several enterprise systems, including management of energy efficiency programs, among other functions.

Arantes said: “Often, the electrical protective system shuts down important equipment or processes due to electric power fluctuations that could be tolerated without adding any risks to operations. These small interruptions affect productivity as energy is wasted in restarting the equipment and processes as well as resuming normal operating capacity, not to mention the impact on production and increased CO2 emissions.”

SmartEnergy IT Coordinator, Laysa Mello, explained that the system will standardise the data generated by smart meters to analyse the energy use across the company.

“This standardisation enables better planning of energy consumption and demand in all operations, offering unprecedentedly higher data availability and accuracy,” she said. Although it is an off-the-shelf software already available on the market, SmartEnergy had to be customised for Vale’s needs, the company said. A team of 65 employees was trained to operate the system already deployed in mines in Pará and Minas Gerais and at the Ponta da Madeira port complex, in São Luís (Maranhão).

In 2017, Vale tested the smart meters at the S11D iron ore mine (pictured) and the Salobo copper mine, in southeastern Pará. Salobo saw a reduction of 107 hours of unexpected production shutdown caused by power quality issues, which translated into a production increase of 1.2 Mt/y compared with 2017 and 2018.

In the case of S11D, 18 hours of production shutdown were avoided at the plant, resulting in an increase of 130,000 t in annual production. By the end of 2019, more than 100 smart meters at S11D were connected to SmartEnergy, and, in 2020, Vale plans to deploy this equipment worldwide.

In an intermediate scenario over 10 years, the company expects to save BRL920 million worth of electric power through the installation of smart meters and process management automation in plants in Brazil and abroad. The aim is to reduce greenhouse gas emissions by 120,000 t/y, equivalent to the emissions – in terms of power consumption – of 14,400 average homes. Variables considered in this calculation included the cost of electric power; iron ore, nickel, and copper prices; and Vale’s own production.

In the long run, the project will also focus on reducing other fuels used by Vale, such as diesel, natural gas, and the bunker fuel used in ore carriers. “That brings an even greater potential to reduce emissions.”

At a December meeting with investors in New York and London, the company announced a long-term goal of neutralising CO2 emissions from its operations by 2050 and revised its emission reduction goal by 2030 to comply with the Paris Agreement. The percentage decrease will be announced in the first half of 2020.

ICMM looks to align mining industry on cleaner, safer vehicles

When the International Council on Mining and Metals (ICMM) launched its Innovation for Cleaner, Safer Vehicles (ICSV) program just over a year ago, some industry participants may not have realised how much progress could be made so quickly by taking a collaborative approach.

The ICMM has proven influential across the mining industry since its foundation in 2002 in areas such as corporate and social governance, environmental responsibility, and stakeholder relations, yet it has rarely, until this point, engaged directly as an industry group with original equipment manufacturers (OEMs) and service providers.

Close to 12 months after being established, it’s clear to see the program and the council itself has been successful in bridging a divide.

It has been able to corral a significant portion of the mining and mining OEM market players into a major industry discussion on core focus areas set to dominate the sector for the next two decades.

Now 27 of the world’s leading mining companies and 16 of the best-known truck and mining equipment suppliers are collaborating in a non-competitive space “to accelerate the development of a new generation of mining vehicles that will make vehicles cleaner and safer,” the ICMM says.

The ICSV program was created to address three of the most critical safety, health and environment performance issues in the ICMM’s mission towards zero harm and decarbonisation. Achieving this goal would involve the industry introducing and adopting the next generation of equipment to respond to the challenges.

More specifically, the program aims to:

  • Introduce greenhouse gas emission-free surface mining vehicles by 2040;
  • Minimise the operational impact of diesel exhaust by 2025; and
  • Make collision avoidance technology (capable of eliminating vehicle related collisions) available to mining companies by 2025.

In all three, it seeks to address the industry’s innovation challenge of ‘who motivates who’ or the chicken and egg analogy, according to Sarah Bell, Director, Health, Safety and Product Stewardship for the ICMM.

“You can imagine a mining company saying, ‘we can’t adopt technology that doesn’t yet exist’ or an OEM saying, ‘we can’t invest in development because we’re getting mixed market signals’. This is, of course, why this program has been set up in the way it has,” she told IM. “Bringing both the mining company and OEMs together, they have been able to work through these normal innovation challenges and align on defining the direction of travel and critical complexity to be solved for each of the ambitions set.”

High-level participation

The list of companies the ICMM has been able to involve in this program is impressive.

It is being guided by a CEO advisory group of six; three from the mining community – Andrew Mackenzie (CEO, BHP), Mark Cutifani (CEO, Anglo American) and Nick Holland (CEO, Gold Fields) – and three from the mining equipment supply side – Denise Johnson (Group President of Resource Industries at Caterpillar), Max Moriyama (President of the Mining Business Division at Komatsu) and Henrik Ager (President of Sandvik Mining and Rock Technology).

On the mining company front, ICMM membership makes up around 30% of the total metal market share, with some 46% in copper, 27% in gold and 42% in iron ore. Participating OEMs and third-party technology providers, meanwhile, include the three majors above, plus Cummins, Epiroc, Wabtec Corporation (formerly GE), Hexagon Mining, Hitachi Construction Machinery, Liebherr, MacLean Engineering, MTU, Modular Mining Systems, PBE Group, Nerospec, Future Digital Communication and Miller Technology.

Bell says the high-level participation builds the “widespread confidence” needed to accelerate investment in these three key areas”, while the ICMM’s focus on the leadership side of the technology integration equation and change management has proven “absolutely key”.

She clarified: “This collaboration operates under anti-competition and anti-trust rules. Our role is to convene the parties, motivate action and promote solutions.”

The program offers a “safe space for the OEMs and members to work openly in a non-competitive environment”, she added, explaining that the aim is not to come up with “preferred technologies”, but define the “functional and operational pathways required to meet the ambitions set”.

Vehicle interaction (VI)

Some of the ambitions look easier to achieve than others.

For instance, collision avoidance and proximity detection technology has made huge strides in the last decade, with the ICMM arguing its 2025 target is like a “sprint”, compared with the “10,000 m race” that is minimising DPM underground by 2025 and the longer-term aim to introduce GHG-free surface mining vehicles by 2040.

“There are regulations that require implementation of collision avoidance and proximity detection technology by the end of 2020 in South Africa,” Bell said. This will undoubtedly provide a catalyst for further developments to speed up.

The ICSV program is also leveraging the work of the Earth Moving Equipment Safety Round Table (EMESRT) in its development of fundamental functional/performance requirements for operators and technology providers.

These requirements were updated and released by EMESRT in September and are known as ‘PR5A’.

Credit: Hexagon Mining

Bell delved into some detail about these requirements:

“The EMERST requirements are designed around a nine-level system that seeks to eliminate material unwanted scenarios such as – equipment to person, equipment to equipment, equipment to environment and loss of control,” she said.

“The fundamental change with this newly released set of functional requirements by EMESRT is that the mining industry users have defined the functional needs for levels 7-9 (operator awareness, advisory controls, and intervention controls). That stronger level of collaboration hasn’t necessarily been there.”

EMESRT and its guidelines have been given an expanded global platform through the ICMM’s ICSV, with the program, this year, providing the convening environment for users and technology providers to help finalise these updated requirements, according to Bell.

With all of this already in place, one could be forgiven for thinking the majority of the hard work involved with achieving the 2025 goal is done, but the working group focused on VI knows that while OEMs continue to retrofit third-party vehicle collision and avoidance systems to their machines the job is not complete.

“Let’s think about the seatbelt analogy: you don’t give buyers of vehicles a choice as to whether they want a seatbelt in their car; it just comes with the car,” Bell said.

“At the moment, by design, vehicles don’t always have this collision and avoidance systems built in, therefore there is a big opportunity for collaboration between OEMs and third-party technology providers.”

Underground DPM goals

“The DPM working group have recognised that, in the case of the DPM ambition, ‘the future is already here, it’s just unevenly distributed’,” Bell said.

“Bringing together the OEMs and the mining companies this year through the ICSV program has enabled the group to explore the variety of existing solutions out there today,” she added.

These existing solutions include higher-tier engines, battery-electric equipment, tethered electric machinery, fuel cell-equipped machines for narrow vein mining and solutions to remove DPMs and other emissions from the environment like Johnson Matthey’s CRT system.

And, there are numerous examples from North America – Newmont Goldcorp at Borden, and Glencore and Vale in Sudbury – South America – Codelco at El Teniente Underground – and Europe – Agnico Eagle Mines at Kittilä (Finland, pictured) – to draw from.

Bell also mentioned some examples from Australia where regulatory changes have seen miners apply existing technology and carry out changes in their work plans and maintenance practices to minimise DPM emissions.

Haulage and loading flexibility, battery charging and mine design have all come under the spotlight since these new generation of ‘green’ machines have emerged, so achieving the 2025 goal the ICSV stated is by no means a foregone conclusion.

“There remains more work to do in achieving diesel-free vehicles underground,” Bell said.

The interested parties are aware of this and the program’s DPM maturity framework is helping miners and OEMs plot a course to reaching the target, she explained.

“The DPM maturity framework promotes existing solutions available today that would enable a mining operation to reduce their DPM emissions to a level that would meet the ambition level (shown as Level 4 – transition to zero),” she said.

These frameworks are useful for starting a “change conversation”, Bell said, explaining that mining companies can assess within their organisations where they currently sit on the five-level chart and discuss internally how to move up the levels to meet their goals.

These same frameworks look beyond minimising “the operational impact” of DPM emissions underground, with Bell explaining that Level 5 of the maturity framework involves “non-DPM emitting vehicles”.

GHG-free surface mining vehicles

Even further in the distance is the longer-term target of introducing greenhouse gas emission-free surface mining vehicles by 2040.

This ambition, more than any other, is less clearly defined in terms of technological solutions across the industry.

While battery-electric solutions look like having the goods to reach DPM-free status underground with expected developments in battery technology and charging, the jury is still out on if they can create a GHG-free large-scale open-pit mining environment.

The world’s largest battery-electric haul truck – eMining’s 63-t payload eDumper (pictured) – may have proven its worth at a Ciments Vigier-owned quarry in Switzerland, but the world’s largest open-pit mines require a solution on another scale altogether.

As Bell said: “There is a lot of work to do to develop batteries at scale for surface fleet that suit the different operating conditions.

“That’s a key point because that lends itself to the fact that we don’t want one solution; we will need multiple solutions. We don’t want to stifle innovation; we want to encourage it.”

ICMM member Anglo American has hinted that hydrogen power could be one solution, and the miner is looking to show this next year with the development of its hydrogen-powered 300-t payload haul truck.

There has also been in the last 18-24 months a mini renaissance of trolley assist projects that, ABB’s Gunnar Hammarström told IM recently, could, in the future, work in tandem with battery-powered solutions to provide a GHG-free solution.

The ability for industry to pilot and validate technology options like this “within the boundaries of anti-competition” is crucial for its later adoption in the industry, Bell said.

She said a key enabler of industry decarbonisation is access to cost competitive clean electricity, which would indicate that regions like South America and the Nordic countries could be of interest in the short and medium term for deploying pilot projects.

It is this goal where the industry R&D spend could potentially ramp up; something the ICMM and the ICSV is aware of.

“For the OEMs and mining companies to effectively minimise capital expenditure, optimise R&D expenditure and reduce the change management required by the industry, there needs to be a careful balance of encouraging innovation of solutions, whilst managing the number of plausible outcomes,” Bell said.

In terms of encouraging the development of these outcomes, carbon pricing mechanisms could provide some positive industry momentum. Vale recently acknowledged that it would apply an internal carbon tax/price of $50/t when analysing its future projects, so one would expect other companies to be factoring in such charges to their future mine developments.

Industry-wide GHG emission caps could also provide a catalyst. In countries such as Chile – where up to 80% of emissions can come from haul trucks, according to ICMM Senior Programme Officer, Verónica Martinez – carbon emission reduction legislation could really have an impact on technology developments.

Forward motion

While 2019 was a year when the three working groups – made up of close to 50 representatives in each work stream – outlined known barriers or opportunities that might either slow down or accelerate technology developments, 2020 will be the year that regional workshops convened to “encourage first adopters and fast followers” to move these three ambitions forward take place, Bell said.

A knowledge hub containing the previously spoken of maturity frameworks (delivered for all three groups) will allow the wider industry outside of the ICMM membership to gain a better understanding of how the miner-OEM-service provider collaboration is working.

Bell said the ICMM already has a number of members testing these group frameworks on an informal self-assessment basis to understand “how they are being received at an asset level and feedback insights to the group in an effort to understand how we may portray an industry representative picture of where we are today”.

Such strategies bode well for achieving these goals into the future and, potentially, changing the dynamic that has existed between end users and suppliers in the mining sector for decades.

Bell said: “The feedback that we got from OEMs is that mining companies had completely different objectives, but they have now greater confidence that we are aligned on the direction of travel towards the ambitions set.”

Vale halts tailings disposal at Brucutu dam as it outlines dry stacking investments

Vale says it has taken the decision to temporarily suspend the disposal of tailings at the Laranjeiras dam, part of the Brucutu iron ore mine, in Minas Gerais, Brazil, while assessing the dam’s geotechnical characteristics.

During the shutdown, the dam will have the Level 1 emergency protocol adopted, Vale said. This does not require the evacuation of the downstream population, according to the National Mining Agency.

The Laranjeiras dam had its Statement of Condition of Stability issued on September 30, 2019, which remains valid, Vale clarified.

During the suspension period – estimated at 1-2 months – the Brucutu plant will operate with around 40% of its capacity through wet processing with tailings filtration and dry stacking, Vale said. This will reduce output by some 1.5 Mt/mth of iron ore.

The temporary stoppage does not lead to changes in Vale’s iron ore and pellet sales guidance, which remains, in 2019 and in the December quarter, at 307-312 Mt and 83-88 Mt, respectively.

For the March quarter 2020, production and sales are expected to range between 68-73 Mt, due to weather-related seasonality, the gradual and safe return of operations and in line with the margin over volume strategy, it said.

Despite this setback, Vale executives reiterated its ambitious ‘dry processing’ tailings plan at its Vale Day event in New York, yesterday.

The company said, in its Northern System, 81% of iron ore production was already through the dry processing route, while the Minas Gerais division had 32% of production through such means. Vale plans to convert 70% of its output to dry processing by 2023, compared with 60% today.

The company is investing $1.8 billion between 2020 and 2024 to help with this dry stacking aim, with the main sites operating converting to this solution being the Cauê, Conceição and Brucutu operations.

In addition to this, Vale executives said the company plans to produce the world’s first industrial-scale dry magnetic fines concentrate through the dry concentration innovations it acquired with New Steel in 2018. Vale plans to spend $100 million for 1.5 Mt/y of dry product, with start-up planned in 2022, according to the executives.

In addition to this, Vale said it had moved up its renewable energy plans at its operations and now intended to power its Brazil mines by only renewable means by 2025, compared with its previous 2030 goal. It would go global with 100% renewables by 2030, it added.