Tag Archives: Dugald River

Mine cooling solution set for 2022 start up at MMG’s Dugald River zinc mine

MMG’s Dugald River mine, in Queensland, Australia, is designing, supplying and installing a A$20 million ($14.7 million) cooling solution that, it says, will bring 9.5 MW of bulk air underground to facilitate ongoing zinc extraction.

MMG Dugald River General Manager, Tim Akroyd, said consistent temperature control is critical for the safety of the mine’s employees and contractors working in northwest Queensland’s hot climate.

“MMG has sourced a long-term refrigeration plant and ventilation system designed to deliver a safe work environment for our teams,” he said.

“To sustain mine production at a depth of 500 m below ground, cooling is essential and dramatically improves air quality. Mine ventilation firm, BBE Consulting, helped to scope options that are now spearheading MMG’s cooling works that are well underway, planned for completion by early 2022. The cooling system will be operational for the life of the mine, a period of up to 20-plus years.”

The scope of work covers the installation of 9.5 MW bulk air-cooling capacity, with a centralised refrigerative plant with distributing water circuits to the south and north mine. Water-cooled custom mine chillers, bulk air coolers, cooling towers and ancillary equipment are being deployed.

Water-cooled refrigeration machines have a lower capital project cost and use less power over a 20-year project life, when compared with air-cooled refrigeration machines, MMG said.

Suppliers and local contractors include CivilPlus Constructions, GNH Engineering, Bell Rural Contracting and Total Generators in Cloncurry to name just a few.

Barminco wins 18-month, A$140 million contract extension at MMG’s Dugald River mine

Barminco has agreed the terms of a variation and extension to its development and production contract at MMG’s Dugald River zinc-lead mine, in north Queensland, Australia.

In addition to several amended contract conditions, the variation extends the term of the contract by 18 months to December 31, 2022, with two, one-year options to extend further. The value of the 18-month extension for Perenti’s hard-rock underground miner is approximately A$140 million ($103 million).

Barminco has been operating at Dugald River since 2012. IM recently reported MMG and Barminco were trialling an automated Sandvik LHD at the mine to further boost production.

Barminco’s Chief Executive Officer, Paul Muller, said: “We are excited to continue our relationship with MMG, which began in 2001 at the Rosebery mine in Tasmania. Dugald River has been a significant project for Barminco since commencement during 2012, and this extension will take our valued relationship with MMG to over 20 years.”

Perenti Managing Director and Chief Executive Officer, Mark Norwell, said Perenti had a “robust” tender pipeline of A$8.8 billion and its Underground Industry Sector Group had secured more the A$540 million in contract extensions this financial year.

MMG, Barminco trialling Sandvik autonomous LHD at Dugald River

MMG and Barminco are trialling an automated LHD at the Dugald River mine, in Queensland, Australia, as both miner and contractor look to further boost production at the zinc-lead operation.

While still early days, Barminco (part of the Perenti Group) has a fully autonomous Sandvik LH621i LHD running at the mine, having introduced the loader to increase output.

Sandvik says the AutoMine®-ready LH621i is an intelligent 21 t loader designed for rapid mine development and large scale underground mine production.

“With superior hydraulic power for fast bucket filling and drivetrain power for high ramp speed, the Sandvik LH621i is designed to quickly clear tunnel headings for rapid advance rates,” the OEM added.

MMG’s Dugald River produced 35,505 t of zinc concentrate and 4,277 t of lead concentrate during the March quarter of 2020. While both numbers were lower than the same period of 2019 and the December quarter that preceded it due to lower grades, mining and milling volumes of 462,570 t and 443,378 t, respectively, were both in line with plan.

In this same results release, MMG said of the Dugald River operations: “After an aggressive and successful ramp up during 2019, work in 2020 will continue to focus on opening up new operating areas, to ensure a steady feed of ore to the mill.

“The optimisation of recoveries will be a major area of focus in the processing plant. This work will be key in ensuring Dugald River remains on track to deliver annual mine capacity of 2 Mt and targeted zinc-equivalent production in excess of 200,000 t per annum, by 2022.”

The mine, which achieved commercial production in May 2018, is expected to produce 170,000-180,000 t/y of zinc concentrate in 2020.