Sifting rubble: GCM Enviro

As Queensland’s infrastructure pipeline accelerates, Jim Murphy, Lantrak Waste Division Manager, speaks with Waste Management Review about the efficiency effects of heavy-duty separation.

Workers on Queensland’s Gateway Upgrade laid tools down in March 2019, after 15 years and a $1.1 billion spend.

Designed to unlock economic growth through congestion busting, the project saw the motorway jump from four lanes to six.

To manage material movement, the Queensland Government engaged earthmoving and plant hire specialists Lantrak to move and process clean fill.

Annually moving over 10 million cubic metres of clean and structural fill, the Gateway Upgrade isn’t Lantrak’s only landmark construction project venture, having worked on the Snowy Mountains Scheme and the Wonthaggi Desalination Pipeline.

In addition to its earthmoving service, Lantrak operates a waste and recycling facility in Swanbank, Queensland. The facility is licenced to accept C&D, clean fill and low contaminated soil.

Jim Murphy, Lantrak Waste Division Manager, says the facility prioritises investment in high-quality and heavy-duty processing equipment. He adds that this was the key driver behind Lantrak’s recent Terra Select W 80 Windsifter acquisition.

“We needed a new piece of equipment to separate construction and demolition waste after it had been screened and crushed, so we engaged equipment distributor GCM Enviro,” he says.

“As Australia’s exclusive distributor of Terra Select equipment, GCM Enviro was the obvious the choice on the parameters required.”   

The Terra Select W 80 Windsifter is designed to separate heavy from light materials, such as stone from wood or concrete and bricks from timber. It also removes other light materials such as plastic or paper. Jim says the machine’s efficient ability to separate impurities from useable material flows has streamlined Swanbank’s operations.

The Windsifter is equipped with a high continuously adjustable cleaning level, at throughput rates up to 120 cubic metres an hour in certain streams.

“The machine has a unique hopper with dosing roller, which provides closed operations independent of the screening process. This ensures an even infeed of material into the machine,” Jim says.

Material is fed via an upstream feeding conveyor, with equalisation and distribution conducted via a proportioning drum and downstream acceleration belt. A compressed air nozzle then blows under the material, holding light impurities in the air.

“At the end of the acceleration belt the material is blown over the separation gap, before moving to the separation drum,” Jim says.

“The machine is also very flexible, with the ability to fine tune configurations via taps ducts and separate on heavy and light settings.”

According to Jim, the separator hasn’t disappointed, with minimal downtime or blockages. He adds that through constant dialogue between manufacturers and clients, GCM Enviro is able to ensure reliable customer-orientated servicing support.

“If our material intake grows like I think it will, I look forward to maintaining a long-term partnership with GCM Enviro.”

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