Carnac were engaged to assess the operating limits of an alumina refinery in relation to its environmental licence restrictions.

Carnac’s assessment was successful in providing the client with a go-forward strategy to improve the operation’s return on investment whilst ensuring environmental limits are adhered to.

Carnac were engaged to perform a site wide guarding review of machinery for a nickel processing facility. Carnac inspected the guarding of the entire facility to identify deficiencies in meeting the relevant Codes and Practices and Standards.

Carnac undertook a debottlenecking study and provided plant improvement recommendations for an existing Tailings Liquor Treatment Plant at an Alumina Refinery.

Carnac assessed the suitability of several pumps in a Titanium Dioxide refinery.

Carnac were engaged to perform a review of as-built drawings for a dewatering piping system at a nickel refinery. The aim of the assignment was to confirm that the as-built drawings were suitable for the installation of new pipework.

Carnac assessed the hydraulic suitability of existing spent liquor pumps on an Alumina refinery to determine if the existing electric motors were upgrades to higher-rated motors.

The Alumina Refinery was set to decommission their Cogeneration facility, which would reduce the supply capacity for low pressure and medium pressure steam for use in various facilities across the refinery. Carnac developed a hydraulic model for each of the low pressure and medium pressure steam systems using Piping Systems Fluid Flow and the hydraulic review of the system identified which nodes did not meet the required supply criteria.

Carnac was engaged by the client to provide engineering support to assess operational issues that the client's fines plant was experiencing since the completion of commissioning late 2015. 

The client reported that the flash vessels in the digestion facility were receiving significant internal erosion around the flash vessel inlet nozzle, the inlet riser, witches hat and cone shell. With past investigations and mitigations to minimise wear in mind, Carnac reviewed and provided recommendations on how these nozzles may be modified to potentially reduce internal vessel wear and optimise flows.

Carnac was engaged to perform an engineering design check on the footing of their existing radial stacker to confirm its adequacy under updated loading conditions. The load capacity of the footing was to be used in the design of a future replacement rail stacker.