Hazelwood Power Station Ash Thickening

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Hazelwood Power Station, a 2000 MW brown coal power station, produces approximately 350,000 cubic metres of ash per year.

GHD assisted International Power to consider a wide range of future ash management options for the power station, and to construct and commission an ash thickening plant and in-pit thickened ash deposition.

The plant was used to convert the lean ash slurry from the power station’s existing ashing system to thickened ash, for deposition into an ash retention area in the open cut mine. GHD used existing mining industry technology to convert low concentration brown coal ash solution to thickened ash slurry.

The ash thickening plant was developed without causing disruption to power generation processes and eliminated the need for the multiple handling of ash or the construction of a water retaining ash dam.

Further benefits included reduced environmental impacts through decreased risks of groundwater being contaminated by ash deposits, improved water management and quicker access for rehabilitation.

Tailings

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Over the past 30 years, we’ve earned local and international recognition for cost-effective, practical, and innovative methods used in tailings design and management.

GHD is represented on national and international technical committees including Australasian Institute of Mining and Metallurgy (AusIMM), Australian National Committee on Large Dams (ANCOLD) and close links with organisations such as the Australian Centre for Geomechanics (ACG).

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