Tag Archives: Gold Fields

Gekko installs OLGA, Carbon Scout solutions at Gruyere as part of collaborative project

Gekko Systems, as part of a collaborative project to collect and analyse real-time gold reconciliations and automate gold processing plants, has installed its OLGA and Carbon Scout solutions at the Gruyere gold mine in Western Australia.

In October 2020, METS Ignited Industry Growth Centre announced the consortium of Gold Fields, Orway IQ, CSIRO, Curtin University and Gekko Systems as recipients of the Tranche 4 Collaborative Project Funds. The METS Ignited funding will assist the development of this project.

In a world-first, the project draws together a range of technologies, including the Gekko OLGA and Carbon Scout, and skill sets that are the first step to truly understanding what is happening in a gold production plant in real time and will eventually lead to a fully autonomous gold plant, Gekko said.

Gekko recently installed the OLGA and Carbon Scout at Gruyere (a joint venture between Gold Fields and Gold Road Resources), the site where the project will become reality.

“The Gekko OLGA and Carbon Scout will revolutionise the industry’s ability to measure gold circuit inventory and recovery in real time, move it into the digital world and provide opportunity for full automation,” Gekko said.

OLGA is a world first on-stream analyser designed to continuously read low grade gold grades in slurries and solutions, giving operations the ability to see and control their plants in real time, the company says. The alternative traditional sampling methods involve significant delays – of up to one or two days for feedback.

The Carbon Scout is a self-contained, ground-level sampling system to improve carbon concentration measurements in carbon-in-leach and carbon-in-pulp circuits to an accuracy of ±0.5 grams of carbon per litre of pulp. Uniquely, multiple other data points include slurry density, pH, DO and gold loading on carbon, Gekko explained. Data profiles are provided in every tank, every hour.

“The combination of OLGA and Carbon Scout, supported by the Gekko Sample Delivery System, means all CIL/CIP sampling can be done conveniently and safely at ground level,” it said. “Each tank is sampled by a patented pumpless delivery system. All samples in the plant including leach feed and tails will be delivered through this system to potentially alleviate the need for expensive cross-cut samples.”

The team of Orway IQ will deliver the data through the Trinity program. With the MillROC data system and the Gekko technical team using the data for system analytics.

The ultimate aim of the project is to have gold process and recovery data being analysed within minutes rather than days from anywhere in the world and for production to be adapted to reflect this data, Gekko said.

DDH1 drilling contractor debuts on ASX after stellar IPO

DDH1 Ltd has officially commenced trading on the Australian Securities Exchange following an initial public offering last week that saw the drilling contractor secure gross proceeds of A$150 million ($115 million) through the issue of around 40% of its shares.

The IPO proceeds were used to allow existing shareholders to realise part of their investment in the company and to repay company borrowings, the company said. The IPO was one of the largest by a Western Australia-based business in the past decade, according to DDH1.

“The ASX listing marks a significant milestone in the evolution of DDH1, which was established in Perth in 2006 with the vision to create Australia’s premier mineral drilling contractor,” the company said. “Over time, DDH1 has earned the custom of Australia’s premier mining companies through its repeated and meticulous service offering of gathering the critical geological data that supports the decision making in respect of all mining activity through the complete cycle of a mine’s life.”

DDH1 has a portfolio of approximately 102 clients, with a financial year 2020 pro-forma revenue of A$249.8 million. Its earnings are diversified across multiple commodities and geographies, with a client base that includes Newcrest Mining, BHP, Evolution Mining, Gold Fields, Independence Group, Kalgoorlie Consolidated Gold Mines, Newmont Corp, Ramelius Resources, Rio Tinto, Roy Hill Iron Ore and St Barbara.

It offers both surface and underground drilling services, with diamond coring and reverse circulation rigs on offer.

Sy Van Dyk, DDH1’s Managing Director and CEO, said: “The growth and success of DDH1 to date is testament to the commitment of the whole team, which strives to ensure the safety of all stakeholders while delivering exceptional service to our clients.

“Our long-term client relationships are built on the provision of quality drilling services and a deep understanding of our client’s business needs. The company’s significant market position reinforces the strong levels of industry recognition.”

He concluded: “There is growing demand in the Australian mineral drilling sector for DDH1’s services because of increased exploration, development and production spending by minerals exploration and mining companies. As an ASX-listed company with a strong balance sheet, a committed shareholder base, a disciplined approach to growth and access to capital markets, DDH1 is well positioned to pursue its growth strategy.”

Aggreko to energise mine power space with investment proposition

Mobile power provider Aggreko says it is making the transition from being a pure power provider to a long-term mining project investor that is helping miners navigate the energy transition.

Aggreko has built an almost 60-year-long reputation for powering many sectors around the globe. It has also supplied power and underground cooling to the mining sector for more than 35 years and has evolved into life-of-mine contracts and renewables.

In its latest report – which details its future energy transition – Aggreko cites mining as a major growth sector. Aggreko Australia Pacific Managing Director, George Whyte, stated that Aggreko’s global team’s unique offering is with build-own-operate investments across all continents.

As well as continuing to invest upward of £250 million ($347 million) annually in technology and innovation, the company says it is ready to further boost its investments in the natural resources industry.

Whyte said: “Investor partnerships can support the rapid changes in technology and emissions compliance that our mining customers are facing. Investing millions of dollars in capital for a mine’s power plant is a risk for any company, and, as a partner, Aggreko takes on this risk instead of the mining company. It is a smart way for miners to do business in the post-COVID and renewables era.”

Aggreko’s Global Head of Mining, Rod Saffy, said miners struggling to get funding for capital expenditure projects were looking to outsource, and there was a trend toward creating partnerships with providers.

“Partnerships provide more value beyond de-risking project finances,” Saffy said. “There are technology and emissions risks, so by partnering with us, for example, we aren’t just supplying equipment and labour, we share in decision making and project milestones, we invest and update technology on-site and navigate social and environmental impacts together.”
Saffy said companies looking to build power stations for the first time particularly benefited from supportive partnerships with Aggreko.

“Power stations are our core business, and they have become much more complex on mine sites than they have been in the past,” he said. “It is challenging to get funding to build power stations, and miners are needing support to integrate renewables into their plans immediately or in the future, or needing solutions designed from scratch.

“Partnering with us is a sustainable and beneficial business solution. Miners are wanting hybrid power stations that might utilise a mix of energy sources such as diesel, gas, solar or battery, for example. They also want that power to be scaled up or down and upgraded as their needs change and new technology comes online.”

Saffy said mines throughout the world were becoming less dependent on mass-scale thermal plants to deliver baseload power through national grids.

“With the cost of renewable power generation falling, there is also growth in localised microgrids, which means less dependence or complete independence from the grid,” he said. “Miners in Australia, Africa and South America, where there is less infrastructure in remote locations, are finding it particularly helpful to partner with us from the start of a major project.”

One such example is the Gold Fields Salares Norte Mine in northern Chile where Aggreko has become a major investor, and partner for the mining project for at least 10 years. The mine is located 190 km from the nearest town and is 4,500 m above sea level, and Aggreko is creating an off-grid hybrid power solution, comprising of diesel and solar for the harsh environmental conditions. Aggreko estimates the mine will experience $7.4 million in cost energy savings across the 10 years.

Saffy said the benefits for Aggreko in partnering and investing with miners from the beginning of their project to the end of the life of mine was beneficial for both parties.

“As a partner, Aggreko de-risks the threat of future innovation and technology for miners,” he said. “Our build, own, operate and maintain model frees up working capital without increasing the debt ratio for mining projects. Modular equipment also gives miners the ability to leverage innovation at low risk and not be concerned about having the latest equipment.

“We benefit too, by showcasing our expertise and innovations throughout a project’s lifecycle and support mining companies to reduce emissions and increase their operational efficiencies.”

Late last year, Aggreko committed to achieving net zero emissions by 2050.

Gold Fields wins NERSA approval for South Deep solar power plant

Gold Fields says it has received the electricity generation licence approval from the National Energy Regulator of South Africa (NERSA) for the construction of a 40 MW solar power plant at its South Deep gold mine in the country.

The acting CEO of NERSA now has to authorise the licence, a decision that should be forthcoming over the next two weeks, the miner said. All the regulatory approvals to proceed with the project will then be in place.

Gold Fields will update its definitive costings and finalise all the required internal processes to commence the project as soon as possible. The company has stated previously that the solar plant has the potential to provide around 20% of South Deep’s average electricity consumption.

Nick Holland, Gold Fields CEO, said: “The solar power plant will increase the reliability and affordability of power supply to South Deep, ultimately enhancing the long-term sustainability of the mine.

“The approval of this licence sends a strong, positive message to mining companies and their investors, potentially leading to decisions being taken to sustain and grow mining operations in the country, especially in deep-level, underground, marginal mines. Enabling companies to generate their own power also gives Eskom room to address operational issues at its power plants.”

Gold Fields says its energy objectives are based on four pillars – energy must be reliable, available, cost-effective and clean – which promote a shift to self-generation using renewable energy sources. “We are fully committed to making our contribution towards net-zero emissions,” Holland says.

During 2020, Gold Fields successfully implemented solar and wind power plants, backed by battery storage, at two of its Australian mines, Agnew and Granny Smith, and committed to renewables at its other Australian mines, Gruyere and St Ives, as well as the Salares Norte project in Chile when it starts operations in 2023. All its other mines are also reviewing renewable energy options.

Since full commissioning of the Agnew microgrid, renewable electricity averages over 55% of total supply at the mine.

During 2020, renewable electricity averaged 8% for the Australia region and 3% of total group electricity, Gold Fields said. Once the South Deep project is commissioned, renewable’s contribution to the group total will rise to around 11%.

Holland concluded: “We expect our investment in renewable and low-carbon energy sources to contribute significantly to our carbon emission reductions over the next few years. Power from the South Deep solar plant will partially replace coal-fired electricity from Eskom, enabling us to significantly reduce our Scope 2 carbon emissions.”

Gold Fields keeps modernising Granny Smith with Mobilaris solutions

Gold Fields has implemented both Mobilaris Onboard and Mobilaris Situational Awareness at its Granny Smith underground mine in Western Australia as part of an ongoing modernisation program.

In 2018, Gold Fields launched a five-year modernisation program for the site. The first phase’s ambition is to ensure cost efficiency, productivity and a safe work environment by integrating data-driven solutions into the mine.

Michael Place, Mine Manager at Granny Smith, said Gold Field has three dedicated full-time personnel to work on the modernisation program. It has also employed external consultants and contractors to assist with the integration.

“Together, we integrate an underground LTE system to have full connectivity in the mine,” he said.

Gold Fields’ investment will also have environmental effects over time as its digitalisation allows the company to work more sustainably.

“Moving into a more digital world is going to make sure that we are sustainable long-term,” Place said. “For instance, we can maintain our cost profile during expansion and follow up on our environmental footprint.”

Historically, underground blasting has been one of the biggest time thieves in the Granny Smith Mine, with the operation currently losing four hours of production in a 24-hour period due to the firing. With the ongoing modernisation program, Place looks for the mine to become more efficient than before.

“Integrating technology into the mine allows us to look at options to reduce the inactive time,” he said. “We can increase efficiency through autonomous equipment, remote operations, and digital solutions. The expected outcome is a 5-15% increase in productivity.”

The Granny Smith Mine has close to 4,000 different locations, with over 100 employees underground at the same time. It already runs 1.2 km deep and, like many mines, is under constant development.

Michael Place, Mine Manager at Granny Smith

In 2019, a group from Gold Fields Granny Smith, including General Manager, Andrew Bywater, visited Boliden in Sweden to study the use of the Mobilaris product suite, with focus on Mobilaris Onboard and Mobilaris Situational Awareness in the Kristineberg mine.

Mobilaris Onboard, working as a machine navigator underground, creates traffic awareness and a safe and effective traffic flow, according to the company. Based on real-time data, Mobilaris Situational Awareness enables transparency and awareness. The information makes it possible to control the operations and resources, and people can quickly act upon what is happening and make smart decisions faster, Mobilaris says.

Because Mobilaris data and positions were shared in real time, the operation had seen an increase in safety and efficiency, according to Mobilaris.

This visit has since led to Gold Fields implementing both Mobilaris Onboard and Mobilaris Situational Awareness at its underground operations at Granny Smith.

Place said: “Mobilaris Onboard allows us to navigate to all locations underground quickly and efficiently. It will improve our productivity and decrease inactive time by reducing traffic congestion and finding equipment and machines faster.

“We are a haulage-constrained mine and, by reducing the cycle time of our haulage fleet, we can raise our productivity. It is a significant benefit.”

Strong customer relations allows Mobilaris to develop and test all products in real environments, as well as the possibility to bring companies to customer’s sites to experience the products in use, Mobilaris said.

“Our close relationship with the customer is a crucial success factor for Mobilaris,” Pascal Hansson, Sales Director, Mobilaris Mining & Civil Engineering, said. “All our solutions are tested in Boliden’s and other companies’ underground mines. This gives us the confidence to deliver what we promise to our customers.”

Gold Fields has plans to use Mobilaris Situational Awareness as its number one source of information and integrate it with fleet management, inventory systems, and the daily shift scheduler, according to Mobilaris. The mine’s digital investment is expected to pay off within a year, it added.

Place explained: “The location data will synchronise with daily schedules to ensure real-time data is captured from the time jobs are planned and executed. We are looking at efficiency improvements, but we are currently introducing this technology to maintain our production profile with the increasing depth and costs.”

The Gold Fields modernisation program has full support from top to bottom and is expected to be finished over the next two years, Mobilaris said.

During the research process, Gold Fields discovered that Mobilaris Onboard addresses specific safety issues. By sharing positional data and navigation in 3D, drivers can avoid traffic congestion and find shelter during emergencies.

Place said: “We have installed tablets in all our heavy vehicles. With Onboard’s traffic awareness feature, we can minimise the vehicle-vehicle interaction and the vehicle-personnel interaction. The application also tells us where to find the three nearest refuge chambers to our location. So, if there is an emergency, we can get the quickest path to safety.”

Barminco bags A$200 million contract extension at Gold Fields’ Agnew mine

Perenti’s hard-rock underground miner Barminco says it has been awarded a A$200 million ($153 million) contract extension at Gold Fields’ Agnew gold mine in Leinster, Western Australia.

The extension is for full underground mining services, driven by an increase in development and production “physicals” at the mine, Perenti said, adding that Barminco has been operating at Agnew since 2010.

Perenti Managing Director and Chief Executive Officer, Mark Norwell, said: “We are delighted to be extending our relationship with our long-standing client, Gold Fields.

“Part of our 2025 group strategy is to organically grow this part of our business. The recent achievements of Barminco in this regard are a result of the strong relationships we share with our clients and the value we create for them through our world-class underground mining capabilities.”

Perenti Mining Chief Executive Officer, Paul Muller, said: “We have been providing safe and efficient underground mining services at Agnew for more than 10 years and we are very pleased to be supporting Gold Fields with their increased development and production requirements. This extension will take our current term out to December 2023.”

Mines Rescue Services trials ‘world first’ mobile rescue winder at South Deep

Mines Rescue Services (MRS), a non-profit organisation, has reportedly carried out test work on a “world first” new mobile rescue winder that, it says, can reach a depth of 3 km underground.

MRS, on January 21, conducted the trial at Gold Fields’ South Deep gold mine, in Gauteng, South Africa, Engineering News reported. The winder can be used to bring employees to surface in the event that normal processes do not work, it said.

The winder was developed by MRS, in collaboration with Minerals Council South Africa members, the Department of Mineral Resources and Energy and Labour.

The testing involved lowering and raising the conveyance at a speed of 1.5 m/s, with a simulated load of six people, to a maximum depth of 3 km. The ability to reach such a depth is significant, MRS says, bearing in mind other rescue winders  could previously only go down to 1.6 km.

Aggreko to energise Gold Fields’ Salares Norte mine with hybrid power solution

Aggreko, a leading provider of mobile and modular power solutions, has signed a contract with Gold Fields to provide a 25.9 MW hybrid solar and thermal power solution to the Salares Norte open-pit mine in Chile.

This “ground-breaking solution” has been designed to provide power for the entire mine, which sits at an altitude of 4,500 m in the Andes mountain range and is 190 km from the nearest town, Aggreko says.

The hybrid system will comprise both tailormade high-altitude performance diesel gensets and Aggreko Solar Power units, optimised for off-grid applications and ready to meet the extreme wind conditions these units will experience.

The gensets will each deliver 772 kW (for 16 MW of power in total) and will incorporate spinning reserve and cold reserve units to efficiently manage peaks in demand, the company says. This diesel generation system will be integrated with solar units, which, once installed, will provide 9.9 MW of emission-free power.

“The system will deliver a reliable, modular power supply across all five of the mine’s distribution points, whilst surpassing the Chilean government’s environmental standards as well as Gold Fields’ requirement for a minimum of 20% renewable power generation for mining operations,” Aggreko said.

Once complete, it will achieve $7.4 million in cost of energy savings over the next decade and a further $1.1 million in carbon tax offset over the Aggreko project lifetime in addition to 104,000 t of carbon emissions savings, Aggreko estimates.

“The modular rental solution also supports a consolidated capital expenditure outlay, allowing for greater cost control and variable commitments whilst ensuring continued operational excellence at the mine,” it added.

The deployment of this hybrid solution follows Aggreko’s recent launch of Aggreko Solar Power, which will be deployed to provide power at the site. This solution is designed for weak or off-grid energy applications, providing clean and efficient power supply to a range of operations without long-term financial commitments.

Pablo Varela, Latin America Managing Director from Aggreko, said: “As the energy transition continues to gather pace, our customers are increasingly looking for more flexible power solutions which can reliably support operations whilst reducing carbon emissions and lowering costs.

“Hybrid products, such as the one we are deploying for Salares Norte, enable a reliable and flexible power supply whilst reducing carbon emissions, thanks to the incorporation of Aggreko Solar Power units as part of the system. Having a standardised product such as this provides the kind of consistency and reliability which our customers have come to expect from us.”

The 10-year contract between Aggreko and Gold Fields for power generation at the mine represents the strong working relationship between the companies, reinforced with the recent installation of one of the world’s largest renewable microgrids at Gold Fields’ Granny Smith mine in Western Australia.

First production from the mine is set for early 2023, with Salares Norte having an 11.5-year life of mine with a production average of 450,000 oz/y for the first seven years of operations.

Gold Fields installs CAS safety solution at Tarkwa gold mine

Gold Fields is upping the safety stakes at its Tarkwa gold mine in Ghana, employing a collision avoidance system (CAS) that should reduce the number of vehicle-to-vehicle and vehicle-to-personnel interactions at the open-pit operation.

Having installed a fatigue management system back in 2012-2013 – which saw equipment interactions and accidents decrease – the company has now purchased the HxGN MineProtect Collision Avoidance System Pro as part of a “discrete, dedicated project”, a company spokesperson confirmed to IM.

Hexagon says the CAS Pro system protects all mining vehicles, assets and vehicle operators within 500 m of the installed cab-based unit in open-pit mines.

The solution provides 360° awareness for surrounding vehicles and selected assets, as well as a collision avoidance function based on path prediction, the company explained.

Using GNSS and RF technologies, the solution enjoys high operator adoption because of minimal nuisance alarms and enhanced safety for all mine and vehicle types, according to Hexagon.

The Gold Fields spokesperson said CAS Pro was being used in line with Earth Moving Equipment Safety Roundtable (EMESRT) guidelines. The solution includes operator awareness and advisory controls, the spokesperson added.

As part of the project, Gold Fields has issued 150 personal tags to employees working near operating equipment, including spotters and samplers. The operating equipment to benefit from the new solution includes 84 dump trucks, 21 excavators, 65 pieces of ancillary fleet (including loaders, dozers and service trucks) and 100 light vehicles (50 with fixed CAS units and 50 with removable units).

While the CAS solution does not include anti-braking functionality, it does have a range of other intervention procedures, according to the spokesperson.

“Stopping a plus-200 t haul truck in milliseconds in an open-pit environment may create other hazards,” the spokesperson explained.

MACA increases open-pit scale by acquiring Downer EDI’s Mining West business

MACA has entered into a binding agreement to acquire Downer EDI Limited’s Mining West business in a deal that could involve a consideration of A$175 million ($132 million).

Just last week, MACA said it was considering the potential purchase of Downer EDI Limited’s Mining West division as part of a stated plan to explore and pursue growth opportunities that will deliver “value to shareholders on an ongoing basis”.

The Mining West business currently comprises four large contracts at the long-life assets of Karara (Ansteel), Eliwana (Fortescue Metals Group), Cape Preston (CITIC Pacific) and Gruyere (Gold Fields, Gold Road Resources).

MACA’s CEO and Managing Director, Mike Sutton, said the acquisition provided MACA with a very meaningful addition of a large-scale mining fleet currently engaged across these projects. This comprises 14 excavators and shovels, 65 dump trucks, 11 surface drills and 36 other ancillary machines.

The fleet being acquired is currently fully utilised, or in the process of being deployed to projects, with the equipment having mixed life (with machines being on average mid-life). MACA says its due diligence has confirmed the machines are in good working order, having been well maintained by Mining West’s internal plant department.

With the inclusion of Mining West, MACA now has total contracted work in hand of over A$3.4 billion, which provides a robust revenue base well past its 2025 financial year, Sutton added.