Tag Archives: haul truck tray

Newcrest looks to new FMS, haul truck trays for Red Chris improvements

Base metals, Equipment maintenance, Mine operation news, Mining consumables, Mining equipment, Mining services, Precious metals, , , , , , , ,

With gold and copper production dropping and costs increasing, the Red Chris mine, in British Columbia, Canada, is set for a number of improvement initiatives, according to 70% owner Newcrest Mining.

In the company’s September quarter results, Newcrest said Red Chris gold and copper production came in at 12,636 oz and 7,050 t, respectively, during the three-month period. This was down from the 15,440 oz of gold and 8,401 t of copper registered in the June 2020 quarter.

Newcrest said the circa-3,000 oz drop in gold output reflected a higher proportion of lower-grade stockpile material being fed to the mill due to unseasonal rainfall hitting the availability of higher grade ex-pit material.

This lower-grade mill feed adversely impacted recovery rates, partially offset by a 13% increase in mill throughput following process control improvements and a higher proportion of stockpiled material with “characteristics that enabled increased processing rates”, it said.

Red Chris’ all-in sustaining cost of $2,621/oz in the September quarter were significantly up on the $1,536/oz seen in the previous quarter. This was driven by increased sustaining capital expenditure, higher operating costs due to “seasonal benefits allowing increased activities to be scheduled”, together with the impact of a strengthening Canadian dollar against the US dollar and lower copper sales volume, it said. These factors were only partially offset by the benefit of a higher realised copper price.

With one quarter of Newcrest’s 2021 financial year down, the company said it is planning to put in place a number of additional improvements across the site. Included in this is a new fleet management system, the replacement of the conventional Cat 793 truck trays with “high-performance trays” to realise payload benefits, and several throughput and recovery-related projects.

The company has 45,000-55,000 oz of gold and 25,000-30,000 t of copper production slated for Red Chris in its 2021 financial year.

Upon announcing the acquisition of a majority stake in the asset in 2019, Newcrest Managing Director and CEO, Sandeep Biswas, said there was potential to turn the Red Chris orebody into a Tier 1 operation.

It also outlined a two-stage plan to deliver value from the $806.5 million acquisition. This included applying its “Edge transformation approach” to the existing Red Chris open-pit mine and processing plant, and potentially leveraging industry leading mining methods and technology such as block caving, coarse ore flotation and ore sorting.

WA gold mine looks for payload boost in Austin Ultima truck body trial

Equipment maintenance, Mining consumables, Mining equipment, Mining services, Precious metals, , , , , , , , ,

One of Western Australia’s key gold mines is trialling Austin Engineering’s new Ultima truck bodies on several of the operation’s 240 t haul trucks as it looks to optimise and maximise its haulage fleet payloads.

The trial has the potential to be converted into a fleet-wide body upgrade, according to Austin, continuing a program that started in 2014 when the engineering company fitted its JEC bodies and increased payload by more than 20 t/load at the operation.

The new Ultima body (pictured on a truck) will take the payload up to 240 t/load and further maximise the haul fleet’s availability and productivity, Austin said.

Going back to the previous payload increase program, the JEC bodies were fitted to the haul fleet after the mine identified a series of production-oriented challenges – including weight of the OEM bodies, the high cost of maintaining the bodies (and subsequent non-availability of the haul truck) and non-achievement of target payloads – impacting on performance and productivity of the load-haul fleet, according to Austin.

Initially 11 bodies were ordered and ultimately the mine’s load-haul fleet was retrofitted.

The customised bodies lifted payload capacity to 230 t/load – an increase of around 20 t/load over the OEM bodies – an outcome of the weight differential between the OEM tray and the JEC body. “Along with increased payload, the body change-out improved haul fleet availability and performance – the result of less frequent unscheduled body repairs, an outcome of the replaceable floor in the JEC body, which eliminated the need for heavy, maintenance-intensive wear line plates,” Austin said.

Now, with the trial progressing, the long-serving JEC units are in line to be replaced by the Ultima bodies which, due to further advances in the payload capacity vs body weight equation, will lift payload to 240 t/load and still meet all OEM dump truck specifications, according to Austin.

“The Ultima haul truck body has the potential to be a significant gamechanger in haul fleet operation due to its advanced steel and design technologies,” Austin said. “A lighter-weight module design, it features improved structural integrity for superior impact and wear resistance, extended fatigue life and lower maintenance costs – all targeted to maximised payload, improved cycle efficiency and significantly reduced total cost of ownership.”

A ‘V’ profile floor, designed to actively channel the load to the centre of the tray, improves machine stability and safety, according to Austin. The floor design also reduces dump cycle times (empty is achieved at 3/4 tipping).

Although the new tray is lighter and stronger than current OEM bodies – which translates to a 10-15% weight saving without sacrificing payload – its design reduces overall tray wear, which significantly increases availability and improves productivity of the mine’s load-haul cycle, Austin said.

The miner’s expectation of the Ultima body is for 240 t/load and, according to the manufacturer, when matched with the appropriate loading tool – such as the 32 m³ bucket on the mine’s shovel excavator – this load figure will be consistently and efficiently achieved.

Just as it did for the JEC units, Austin will maintain a condition monitoring program for the new bodies and advise the mine on any maintenance issues, it said.

The miner is also using Austin bodies in other operations around the world. Specialised hauler bodies have been customised to add significant value and reduce operational costs in underground mining operations, it said.