Tag Archives: gold

CIMIC’s CPB Contractors enters alliance partnership with Newcrest Cadia on TSF, ancillary works

CIMIC Group company CPB Contractors has been selected by Cadia Holdings, a wholly owned subsidiary of Newcrest Mining Limited, to deliver enabling works for the Cadia Tailings Storage Facility Recommissioning Project, in New South Wales, Australia.

The project, to be delivered in an alliance partnership with Cadia Holdings, will support the operation of the Cadia gold and copper mine, near Orange.

The scope involves enabling works associated with the existing Cadia tailings storage facilities and ancillary works including haul roads and supporting facilities. Work is scheduled to be completed in 2023.

CIMIC Group Executive Chairman, Juan Santamaria, said: “We are pleased to have the opportunity to apply our resources and expertise to Australia’s largest gold mining operation. CPB Contractors will work collaboratively with Newcrest to achieve the project’s business goals
while also ensuring the community’s expectations regarding environmental performance and outcomes are met.”

CPB Contractors Managing Director, Jason Spears, said: “With this alliance CPB Contractors will be working in close partnership with Cadia Holdings to ensure that the project is safely delivered to schedule and budget and that all operational objectives are secured. As always, we will be focused on safety and apply CPB Contractors’ extensive regional project expertise to maximise opportunities for cost-effective, efficient delivery.”

Minnovare’s Production Optimiser gold output, sustainability benefits highlighted by Gangemi

One of Australia’s leading decarbonisation and sustainability experts says Western Australian gold producers are not moving fast enough to reduce carbon emissions.

“Some are leading in the carbon space, but most are slow in implementation,” Adam Gangemi, Managing Director of Super Smart Energy, an environmental services company based in Perth, said. “It is time to see more action.”

Gangemi says there are cost-effective solutions to reduce emissions on mine sites that will impact the bottom line, but mining organisations aren’t taking advantage of the technology options that are available on their doorstep.

Speaking on a recent webinar, Gangemi said a Western Australian innovation, Minnovare’s underground drilling optimisation technology, the Production Optimiser, was increasing drilling efficiency, resulting in reduced CO2 emissions, and enabling companies to drill faster, cheaper and more sustainably.

“Minnovare’s Production Optimiser is one of the better solutions that’s come across my desk,” he said. “Even small projects can get big bang for their buck. This drilling solution is one example where a small investment can deliver a 10-fold return through increased production, and significantly avoid those mine site emissions simultaneously.

“Not having to haul or process waste material is a smart way to do this and it is delivering huge results not only from an emissions perspective (thousands of CO2 per year) but also increasing production. If we start to look at opportunities that will both increase production and have the benefit of reducing emissions, this will be a no brainer for underground mining companies.”

Gangemi compared a range of Western Australia Goldfields producers and found that most could be saving anywhere between 1,000 to 8,000 t of CO2 emissions each year by using the Minnovare technology.

“By using the Production Optimiser on site, you drill more accurately and that means more gold on the trucks, less waste and a significant reduction in emissions,” he said. “If we talk about avoiding even 1,000 t of emissions, a WA gold producer could be taking the equivalent of 300 Hilux utes (utility vehicles) off the road every year.”

To demonstrate the emissions savings, Minnovare has launched a new Environmental Impact Calculator, allowing mining companies to quickly compute the emissions they could avoid on site by using the technology.

The Minnovare calculator shows how CO2 emissions are reduced through improved drilling accuracy and uses the company’s own data to forecast emission savings across an operation.

Gangemi’s benchmarking of Australian gold miners showed a greenhouse gas emissions intensity range between 0.2-1.7 t CO2-e/oz of gold.

Mick Beilby, Director and co-Founder of Minnovare, said: “We know the industry wants sustainable outcomes. Through using our technology, companies will achieve less dilution and deviation from an increase in drill quality and this results in less waste.”

Gangemi describes the calculator as ‘very accurate’ and encourages Western Australian producers to use the calculator to understand the savings they can achieve implementing technology products such as the Production Optimiser.

Sandvik Leopard DI650i drill rigs make first appearance in Namibia mining industry

Namibia-based KODO Drilling has taken delivery of the country’s first Sandvik Mining and Rock Solution’s Leopard™ DI650i surface drill rigs, which are set to go to work at an open-pit gold mine.

The rigs will be used as part of KODO Drilling’s down-the-hole (DTH) production drilling remit at the mine. The units arrived at the mine site in early November 2022.

According to Andries van Wyngaard, Territory Manager and Acting Managing Director at Sandvik Namibia, the contract is an important step in the company’s expansion strategy. Over the past year, its field service department has grown to seven trained full-service technicians in-country.

“As Sandvik Namibia gears up to support more equipment sales into the local market, we are grateful to KODO Drilling for their confidence in our innovative products and committed service,” van Wyngaard says. “With the values of KODO Drilling and Sandvik Mining and Rock Solutions so closely aligned – including safety and service excellence – this is a perfect fit.”

The DI650i, a diesel powered crawler mounted intelligent DTH rig, is designed for demanding production drilling applications in surface mining, according to van Wyngaard. The self-contained unit is equipped with an ergonomic iCAB operator’s cabin, fixed boom, dry dust collector and drill pipe changer – incorporating a modern design and layout.

“The rig comes with a range of new or redesigned components to boost its productivity,” he says. “It has the capacity to drill a wide variety of hole sizes from 90-165 mm. We have also run trials in Namibia with our RH560 hammer and we’ve seen exceptional performance – drilling holes from 115-203 mm.”

KODO Drilling Director, Vilho Hanghome, says his company’s progress is based on its constant drive to deliver innovative services and perform within a safe and environmentally sustainable manner.

“Having previously procured exploration rigs from Sandvik, we have valued the equipment quality and service we have received – as these have allowed us to deliver performance within budget to our clients,” Hanghome says. “We are therefore pleased to be investing in Sandvik’s state-of-the-art DTH technology and we will rely on their high level technical support going forward.”

Van Wyngaard says the contract shows KODO’s faith in Sandvik Namibia’s ability to support its DTH offering with aftermarket service. He points to the considerable interest the local market has shown in the delivery of the two rigs.

“After we signed off on the deal and sent the units off from our Khomanani headquarters in Kempton Park, many of our Namibian customers have noticed them on the road and posted excited comments online,” he says. “The mine where the rigs will operate is also looking forward to benefiting from the results of the new machines’ performance.”

Among the advantages the units offer is ground level access to all daily maintenance and service points. This makes for greater safety – as technicians do not have to climb around the machine. It also adds to productivity, as quicker maintenance means less downtime. Its silent and ergonomic cabin is a leader in the market, and boasts excellent visibility for safety and operability, according to the company.

Contributing to its low total cost of ownership are its intelligent hydraulic and compressor systems, which, it says, can deliver 38-42% improved fuel efficiency. Incorporating intelligent technology, the Sandvik DI650i rigs can accommodate scalable automation from on-board options to full automation systems.

Sandvik Namibia has made encouraging progress with recent equipment sales into Namibia, explains van Wyngaard, and he looks forward to a new era of engagement with both the surface and underground mining segments.

“Building on our long-standing relationship with KODO Drilling, we look forward to many more successful ventures with them and other customers,” he says.

Northern Star engages Zenith for renewable power expansion at Jundee

Northern Star Resources and Zenith Energy have signed a preliminary works agreement and term sheet related to the supply of electricity from a solar farm, battery energy storage facility and wind turbines to the Jundee gold mine in Western Australia.

The aim of the initiative is to cut Jundee’s Scope 1 and 2 carbon emissions by 35-50% by 2030.

Supply contracts and planning, engineering and design works are currently being progressed by Zenith while negotiation of the definitive renewable energy power purchase agreement is ongoing, Northern Star said.

Back in 2019, Zenith completed and commissioned its 6 MW build own and operate power station expansion at Jundee, with the addition of Jenbacher 620 Spark Ignition gas generator technology.

BQE Water wins SART plant order from Shandong Gold Mining

BQE Water Inc, a leader in the treatment and management of mine impacted waters, has been awarded a contract for the design, construction and operation of a SART (sulphidisation, acidification, recycling and thickening) plant to improve gold leaching efficiency and overall cyanide management at a gold metallurgical facility in Shandong Province, China, owned by Shandong Gold Mining.

With a contract structure similar to two previous SART plants in the province signed in 2019 that are now in operation with support services from BQE Water, this contract has two project phases. The first involves engineering design, procurement, construction, plant commissioning and start-up. The second is for on-site operations support services for an initial period of five years in exchange for a quarterly service fee based on plant performance.

“The Shandong Gold contract solidifies our leadership position with the SART process technology not only in China but globally,” David Kratochvil, President & CEO of BQE Water, said. “Cyanide management needs are on the rise from the mining of more deposits containing mineralisation that interferes with gold leaching and the increased industry focus for projects to be environmentally responsible and socially acceptable. Through the capabilities of our team, we are committed to supporting the gold mining and smelting sector in meeting their project requirements.”

Songlin Ye, Vice President for Asia at BQE Water, adds: “The fact that Shandong Gold sole-sourced the project from BQE Water speaks volumes about our SART expertise. And with the backing of three SART plants for the three largest gold producers in the region, we look forward to further growing our cyanide management market in China and Asia in general.”

BQE Water says it is a global leader in the SART process which enables cyanide consumed by base metals to be recovered and recycled, lowering the cost of gold extraction and reducing the environmental footprint of gold mining projects. The company also provides solutions to manage the by-products of cyanidation and cyanide destruction such as ammonia, nitrite and thiocyanate removal.

Draslovka to bring glycine leaching expertise to OZ Minerals TAD incubator

Draslovka Holding a.s., a Czech family-owned global leader in cyanide-based specialty chemicals, says its glycine leaching technology has been selected to be part of the OZ Minerals’ Think & Act Differently (TAD) incubator and Waste-to-Value Challenge.

The latter challenge, announced back in December, sees Rio Tinto and Boliden working in collaboration with OZ Minerals to eliminate, minimise, reuse or find new value in mine tailings and ultimately reduce the global carbon footprint of the mining industry. Draslovka said: “The Waste-to-Value Challenge aims to unlock innovative technologies for managing tailings, helping the mining industry to reduce risk while extracting more of the materials the world needs from what was previously regarded as waste for the energy transition at large. Benefits that the initiative hopes to deliver include lower emissions and reduced waste.”

Draslovka offers a range of sustainable solutions to the global mining industry, and its glycine leaching technology (branded as its GlyLeach™ and GlyCat™ processes) represents the best environmentally-friendly alternative to traditional acid and cyanide leaching, according to the company. Due to its selectivity over gangue minerals and the recyclability of glycine, its use enables the recovery of both base and precious metals from lower-grade resources like tailings. This leads to a more sustainable production process and improved economics that are desperately needed to close the looming critical metal supply deficit.

Ivor Bryan, Draslovka’s Mining Innovation Director, said: “I am proud that Draslovka has been invited to participate in the Waste-to-Value Challenge with forward looking companies that understand the need to reimagine solutions for the mining industry. This aligns with our ambition to become the leading supplier for innovative and sustainable solutions for the wider mining industry.”

Speaking to IM on the sidelines of the recent Resourcing Tomorrow conference, in London, Bryan said the company was embarking on around 10 projects in the mining space, which will prove up the 3,500 hours of testing that has been conducted at MPS’ facilities in Perth, Western Australia.

Newmont transitions to Sandvik AutoMine tele-remote ops at Cerro Negro

Newmont says its Cerro Negro underground operations in Argentina have transitioned to tele-remote mode with the implementation of the Sandvik AutoMine® platform.

The transition, completed last year, is part of Newmont’s Full Potential structured and continuous improvement program that began in 2014. This program has since delivered over $4 billion in value, while serving as Newmont’s key vehicle for reducing costs and boosting productivity across its operating sites and functions.

In the company’s recent September quarter results call, Newmont Executive Vice President and Chief Operating Officer, Rob Atkinson, confirmed that Cerro Negro had become the first mine in Argentina to implement the AutoMine system for tele-remote underground loading and hauling.

“The implementation of this technology has eliminated safety risks associated with operator exposure underground, has allowed for the recovery of more ore from each of the stopes, has reduced equipment damage, and, really importantly in the Argentinian context, increased underground working time,” he said.

“We’ve had tremendous success with tele-remote operations at our Australian and Canadian underground mines, and this is yet another example of the value added through the rapid replication of leading practices across our global operations.”

Cerro Negro has three high-grade underground operating mines – Eureka, Mariana Central and Mariana Norte – and two underground deposits being developed, Emilia and San Marcos, as well as five other deposits in late-stage evaluation for development to expand the existing operations in the Marianas Complex and establish operations in the Eastern District.

The extensive Cerro Negro complex has several other deposits and exploration targets, including an open-pit mine known as Vein Zone and one cyanide leach processing facility with Merrill Crowe recovery yielding gold recoveries of 90-97%.

OZ Minerals breaks through at Carrapateena sub-level cave

OZ Minerals has announced that the Carrapateena cave safely propagated to surface on December 29, 2022, marking the transition from development to production planning at the operation in South Australia.

OZ Minerals Managing Director and Chief Executive Officer, Andrew Cole, said: “The Carrapateena cave safely breaking through to surface marks a significant milestone for the mine and an important de-risking event for ongoing operations. With the cave now through to surface it enables mine planning to be optimised for production rather than prioritising the safe development of the cave, which has been the primary focus over the first two years of the mine’s life.

“I’d like to take this opportunity to congratulate the Carrapateena team for their dedication and focus to deliver a safe working environment and successfully managing the cave propagation to surface.”

Close to a year ago, the Crusher 2 level for the sub-level cave mine at Carrapateena was reached, enabling commencement of the Block Cave Expansion declines and an increase in sub-level cave production rates to from circa 4.7 to 5.0 Mt/y from 2023.

The expansion, which will involve converting the lower part of the current sub-level cave into a series of block caves, is expected to prolong operations at the copper-gold mine, while boosting production to 12 Mt/y. This will see average copper production come in at 110,000-120,000 t/y and gold output average 110,000-120,000 oz/y from 2026, compared with production of 55,262 t and 89,778 oz, respectively, in 2021.

Rio’s Nuton venture eyes up leaching opportunities at Regulus’ AntaKori project

Regulus Resources Inc has announced a $15 million non-brokered private placement by Nuton, which will see the Rio Tinto Venture take an approximate 16.5% interest in the company and jointly undertake copper sulphide leach testing using Nuton’s copper sulphide leach technologies with samples from the AntaKori project in Peru.

The Nuton™ technologies, Rio says, have the potential to process arsenic-bearing copper sulphides with less impact on the environment and water resources than traditional concentrator processing.

Regulus has granted exclusivity to Nuton in the area of novel, patented or trade secret leaching technologies, for a period of one year after the delivery of metallurgical samples from AntaKori to Nuton for testing.

Rio, through its Nuton venture, has tabled a solution to treat primary copper sulphides such as chalcopyrite. At its centre is a portfolio of proprietary copper leach related technologies and capability that, Nuton says, offer the potential to economically unlock known low-grade copper sulphide resources, copper bearing waste and tailings, and achieve higher copper recoveries on oxide and transitional material. This allows for a significantly increased copper production outcome, according to the company.

Regulus Resources has outlined a 250 Mt at 0.48% Cu, 0.29 g/t Au and 7.5 g/t Ag indicated resource at AntaKori, in addition to a 267 Mt at 0.41% Cu, 0.26 g/t Au and 7.8 g/t Ag inferred resource.

John Black, Chief Executive Officer of Regulus, said: “The investment by Rio Tinto, one of the largest miners in the world, is another strong endorsement for the AntaKori project. Through Nuton, Rio Tinto has developed sulphide leach processing technologies that could allow for the processing of high arsenic ores without the need for additional on-site treatment or paying heavy penalties to a smelter. Utilising the Nuton sulphide leach technologies could truly be a gamechanger for the AntaKori deposit. The private placement will significantly bolster our financial position and enhance our ability to optimise the value of the existing resources in the project area.”

Rio Tinto’s Chief Executive, Copper, Bold Baatar, added: “This agreement will allow us to evaluate the potential to commercially deploy Rio Tinto’s innovative Nuton technologies for copper leaching at Regulus’ AntaKori project. Our Nuton technologies have the capacity to increase copper production for Rio Tinto and our partners, with a lower carbon footprint and leading environmental performance. Unlocking value from high-arsenic copper sulphides is a particularly exciting prospect for Nuton.”

Perenti’s AMS extends contract at Resolute Mining’s Mako mine

Perenti-owned African Mining Services (AMS) has been awarded a contract extension for surface mining activities at Resolute Mining Limited’s Mako gold mine in Senegal, it says.

The revised contract is valued at approximately $85 million over a period of four years, commencing on January 1, 2023.

Through AMS, Perenti has provided surface mining activities at the Mako mine since 2017.

Mako is owned and operated by Resolute’s Senegalese subsidiary, Petowal Mining Company S.A. Resolute has a 90% interest in Petowal and the Government of Senegal holds the remaining 10%.

It is a conventional drill and blast, truck and shovel operation with mining services undertaken by AMS. The carbon-in-leach processing plant has greater than 2 Mt/y of installed capacity and comprises a crushing circuit, an 8 MW SAG mill and gold extraction circuit.