Eriez to separate at Cadia

NEWCREST Mining has chosen Eriez-Australia and Eriez Flotation Division to supply its Cadia Valley Operations mine in New South Wales with separation equipment to recover gold and copper from a concentrator tailings stream.
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An Eriez Hydrofloat Separator.

Noel Dyson

The equipment order includes two Hydrofloat Separators and four Crossflow Classifiers.

EFD has designed, supplied and commissioned more than 1000 flotation systems worldwide for cleaning, roughing and scavenging applications in metallic and non-metallic processing equipment.

Hydrofloat Separators for coarse particle mineral concentration have the capacity of a density separator while keeping the selectivity of a flotation device.

Using a novel aeration system to disperse fine bubbles into a fluidised-bed environment, the Hydrofloat Separator can increase the selective recovery of coarse particles by applying flotation fundamentals to gravity separation.

It can be applied to coal, iron ore, industrial minerals, base metals and sulphides.

Applications include coarse particle recovery in split-feed flotation circuits and tailings scavenging, which is how it will be used at Cadia. It can also be integrated directly into grinding circuits.

The Crossflow Separator is a hydraulic classifier for the separation of material based on particle size, shape and/or density.

The technology can also be used for desliming, counter-current washing and neutralising acid in minerals.

The Crossflow separates particles based on hindered-settling principles, providing an economical and efficient means of classifying material such as silica and frac sands, mineral sands, and industrial minerals.

The technology was featured at COM 2017 in Canada. At that show Newcrest Mining’s Dr Brigitte Seaman presented a paper she co-wrote with colleague Luke Vollert, which explored recovery of coarse liberated gold particles using pneumatically assisted fluidised bed flotation, specifically the Hydrofloat technology.

Eriez-Australia managing director Jaisen Kohmuench said the company’s team had successfully led projects, operations and businesses related to mineral processing across the globe.

“This gives us the perspective and depth of experience to be a trusted equipment vendor and partner to operations, engineers and mining companies throughout the world,” he said.