minara resources

Market: Resources
Site: Murrin Murrin, Western Australia Contract, Three Years (October 2015 – October 2018)  


During planned shutdowns, the site’s acid converter plant must be cooled down. It generally operates at approximately 400 degrees  Celsius but during a shutdown the temperature drops to  approximately 200-150 degrees Celsius over a number of days.

Usually extraction fans are used for airflow but our Cat® technician discovered that this process actually provides airflow and moisture  to the catalyst, making it active and increasing heat.

EPSA’s solution is to add glycol to run lower temperatures, remove moisture and negate the freezing up of coils overnight in order  to speed up the shutdown process by a few hours.

The cooling solution that we provide drops the temperature to 50 degrees over a 14-hour period providing cost efficiencies with significantly less downtime.


Minara Resources is one of Australia’s top nickel producers and  operates the Murrin Murrin nickel cobalt site in Western Australia’s north-eastern goldfields. Conventional open pit mining techniques  are used followed by ore processing (comprising pressure acid leaching, mixed sulphide precipitation, cobalt refining and nickel refining).  Ammonium sulphate is also produced as a by-product.


EPSA was directly approached by Minara Resources to provide  a competitive quote for power generation, process cooling and  compressed air  supply to the Murrin Murrin site. Our initiatives, proven cost efficiencies and broad capabilities for service were  integral to our success.



Our contract is to supply 20kVA – 2000kVA power generation to  the entire Murrin Murrin site for outages, planned shutdowns and maintenance. Temperature control equipment does not form part of the contract but we are given first right of supply. There is also a  bi-annual requirement for 12MW of temporary power for the  main power station during shutdown maintenance, a process  
that can last for up to three months.


Cat generators and temperature control products including:

  • PM1500 generators
  •  1 additional 810kVA generator for eight months
  •  Acid converter cooling package consisting of CAT 600kVA generator, 700kW chiller, 2 X 450kW air handler units, pump, buffer tank, cables, ducting and other ancillary requirements.

“Thank you for your promptness, efficiency and willingness to help during our shutdown, which certainly was a contributing factor in bringing our shutdown to an early completion...”
– Ceri Gregory, Maintenance Utilities Coordinator, Murrin Murrin Operations, Minara Resources Pty   Ltd, August 2015


Energy Power Systems Australia (EPSA) is Australia’s specialised Cat® engine dealer, supplying Australia, Papua New Guinea and the Solomon Islands with the world’s finest power systems for any application, from marine propulsion to industrial power, electric power generation, oil and gas drilling and offshore production. With an extensive model range, EPSA can configure a solution to meet the needs of any application using a choice of diesel or gas engines.

EPSA also has a national fleet of rental generators, air compressors and temperature control units. Rent the latest technology and products with no maintenance and storage costs. Rent for a day or however long you need with a quick response anywhere in Australia.

EPSA is also a solutions provider, offering design, engineering, procurement and construction for turnkey projects of all sizes and across a broad range of applications.

EPSA’s network of offices across Australia and PNG delivers you technically superior Cat engines with unmatched engineering support, technical advice and after sales support.

Caterpillar® is your guarantee of ongoing dependability, reliability and efficiency.

Supplying Australia with the world’s best power systems.