Key Highlights

  • A 4.75MW as-new SAG mill acquired for the Rocklands Copper Project has arrived at the Eastern Operations site.
  • The mill was sourced domestically in Cobar, New South Wales, after a road journey of around 1,700 kilometres.
  • The single SAG mill replaces the existing three-stage cone crushing circuit in the front-end design.
  • The company expects to appoint a construction contractor before the end of 2026, with production targeted for the second half of 2027.

Austral Resources Australia Ltd (ASX:AR1) has confirmed that a 4.75MW as-new SAG mill acquired for its Rocklands Copper Project has arrived at site, according to an announcement dated 12 November 2026. The mill is the largest single procurement item in the Rocklands refurbishment program, and its arrival is the company's most material equipment milestone to date. The company says the timetable for the 2027 restart remains on track, and the announcement moves the project from equipment procurement toward installation and commissioning.

Sourcing and transport of the mill

The company purchased the mill in New South Wales after identifying it as the largest single procurement risk in the refurbishment. Sourcing the equipment domestically in Cobar avoided the higher cost and longer lead time associated with importing a mill from overseas. The transport was described as logistically challenging, given the size of the components and the roughly 1,700 kilometres travelled on public roads before the mill reached Rocklands.

The delivery was reported in the company's September 2026 quarterly report, which first indicated that the mill had been transported from Cobar. The arrival removes one of the larger uncertainties in the restart schedule, although installation, commissioning and integration with the rest of the plant remain ahead of the company.

A simpler front-end circuit

The mill is central to a redesigned front-end comminution circuit. Earlier in 2026, the company's Technical Committee engaged CMD Consulting to review the existing design, and the work led to a conventional processing pathway built around a single SAG mill configuration. The existing three-stage cone crushing circuit will be replaced under the revised approach, and GR Engineering Services was responsible for the front-end engineering design study that supports the change.

The company believes the simplified approach will reduce operational risk and lower Capital intensity, and that it aligns Rocklands with proven copper concentrator designs used elsewhere. Simplifying a circuit can reduce the number of units that require maintenance and can make the plant easier to operate, although the benefits will only become clear once the circuit is commissioned and performs at design rates.

Next steps and the production timetable

Austral expects to appoint a contractor, alongside internal resources, to manage construction of the front-end modifications. The company intends to make that appointment before the end of 2026, with completion and production expected in the second half of 2027. Those dates were described as previously reported, so the announcement does not change the timetable.

The company operates two processing facilities. Western Operations at Mt Kelly is a copper oxide heap leach and solvent extraction electrowinning plant with a nameplate capacity of 30,000 tonnes a year of copper cathode. Eastern Operations at Rocklands is a sulphide concentrator with a nameplate capacity of 3 million tonnes a year. The company's Mineral Resource Estimate stands at 64 million tonnes at 0.73 percent copper, containing about 468,414 tonnes of copper.

Final Word

The arrival of the SAG mill marks a material step in the Rocklands restart, reducing one of the largest procurement uncertainties in the program. The timetable now depends on the appointment of a construction contractor, the installation of the redesigned circuit and the broader copper price environment. Reagent supply, regulatory approvals and operating performance are also identified by the company as factors that could alter the schedule.