Tag Archives: PPA

Zenith Energy and Northern Star seal renewable energy-focused PPA at Jundee

Environmental, Mining services, Power supply for mines, Precious metals, Sustainable mining, , , , , , , ,

Zenith Energy has converted the preliminary works agreement and term sheet it had in place with Northern Star Resources related to bolstering the power supply to the Jundee gold mine in Western Australia with a renewable energy Power Purchase Agreement.

Jundee is an existing mining operation that will have wind, solar and battery retrofitted into the mix and integrated into the existing gas power station. The renewable generation being added includes 24 MW of wind, 16.9 MWp of solar, and 12 MW/13.4 MWh of battery energy storage.

Zenith says this new energy mix will result in 56% of the mine site’s power coming from renewable sources, contributing towards the aim of cutting Jundee’s Scope 1 and 2 carbon emissions by 35-50% by 2030.

Currently all ore is sourced from Jundee underground operations which yield circa-1.8 Mt/y of ore. There are three underground portals which provide access to the various underground lode structures – Barton, Gateway and Invicta portals. Underground mining is being carried out by an up-hole long-hole open stoping sequence as its primary method. No backfill or paste is used.

The Jundee processing circuit is a conventional carbon-in-leach plant with a hard-rock processing capacity of approximately 3 Mt/y. The process consists of a single toggle overhead eccentric swing jaw crusher followed by a SAG and ball milling circuit incorporating gravity recovery and carbon-in-pulp process achieving 92% recoveries, according to Northern Star.

Newmont’s Gosteva urges action to achieve mining industry’s decarbonisation goals

Automation, Environmental, Mining equipment, Mining events, Mining services, Sustainable mining, , , , , , , , , , ,

Partnerships between miners and mining equipment, technology and service (METS) providers will prove key in solving the emissions reductions and sustainability targets mining companies have set for 2030 and beyond, Victoria Gosteva, Decarbonisation Program Manager at Newmont, said at the SME MineXchange Annual Conference & Expo in Salt Lake City today.

While outlining Newmont’s Energy & Decarbonization Program on stage, Gosteva made important statements about how the wider industry could decarbonise its operations and hit the goals it has set. Newmont, itself, has set a goal of reducing its greenhouse gas (GHG) emissions by more than 30% by 2030, with an ultimate goal of being net zero carbon by 2050.

Gosteva, urging actions over the near term, said partnerships with the METS community would be needed to set the companies on the right track to hit their sustainability goals, explaining that it was not only the technology-readiness element that needed to be addressed, but also the required infrastructure to, for example, charge electric vehicles.

“We can no longer afford to be fast followers as an industry,” she said. “There is really not that much time left to reach the 2030 targets.”

She said the investment community was also taking note of the need to decarbonise mine sites, with emissions likely to become a big contributor of company valuation metrics in the future.

Focusing on Newmont’s journey, in particular, she highlighted the $500 million the company committed over five years toward climate change initiatives back in 2020.

In addition to a number of PPA agreements looking to decarbonise the power grid of many of its remote mines, she also highlighted the 2021 signing of a strategic alliance with Caterpillar Inc to deliver a fully connected, automated, zero carbon emitting, end-to-end mining system, as well as a number of “energy efficiency” type of projects related to automation, data analytics and other projects that came under these initiatives.

Many of these projects were being helped by an enhanced investment system and process that incorporates and addresses emissions through an embedded carbon pricing mechanism. Gosteva said adding an emission calculator into these models where every project has an emission aspect in the investment review saw many of these projects develop a solid business case.

One project that has been helped by this is the strategic alliance with Caterpillar that will see the introduction of first-of-a-kind battery-electric haulage technology and automation at the gold miner’s Cripple Creek and Victor (CC&V) and Tanami mines in the USA and Australia, respectively.

Under the agreement, Newmont plans to provide a preliminary investment of $100 million as the companies set initial automation and electrification goals for surface and underground mining infrastructures and haulage fleets at Newmont’s CC&V mine in Colorado, USA, and Tanami mine in Northern Territory, Australia. The goals include:

  • Introduction of an automated haulage fleet of up to 16 vehicles at CC&V planned through 2023, with a transition to haulage fleet electrification and implementation of Caterpillar’s advanced electrification and infrastructure system with delivery of a test fleet in 2026. Actions include validating first-of-a-kind battery-electric haulage technology in the years prior to full production of autonomous electric haulage equipment;
  • Caterpillar will develop its first battery electric zero-emissions underground truck to be deployed at Tanami by 2026. The deployment includes a fleet of up to 10 battery-electric underground haul trucks, supported by Caterpillar’s advanced electrification and infrastructure system. This includes first-of-a-kind battery electric haulage technology for underground mining in 2024, the introduction of battery autonomous technology in 2025, with full deployment in 2026.

Gosteva highlighted that this project – which would also see the companies work on re-using batteries for energy storage when they hit their end of life in mobile mining applications – was very important to the company achieving its goals, but acknowledged that there was no silver bullet to achieving its targets.