Case Studies, Crushing, Mobile Plant, Processing, Screens & Feeders

Robust screen helps to future proof coastal port development

A heavy-duty mobile screen is processing reclaimed spoil for a New Zealand coastal port development. Its contribution is saving infrastructure costs for Christchurch and the surrounding region and bolstering the environmental health and commercial growth of the port facility.

The Lincom Group, which combines industry expertise and experience with their product offering to help solve material processing needs within the quarrying and recycling industry sectors, has delivered a heavy-duty screen – the latest generation Powerscreen Warrior 2400 – to C&R Developments Ltd, of Cambridge, 
New Zealand.

C&R is a 100 per cent New Zealand-based and family-owned business formed in 1998 by the four Ross brothers. The company owns and operates a wide selection of heavy plant for the toughest and most demanding jobs. C&R Developments operates across New Zealand. It has won awards for its environmental work and takes pride in completing major projects on time and 
within budget.

C&R is assisting the Lyttelton Port Company (LPC) on a coastal land reclamation and development program. Coastal reclaimed land was formerly below the line of high tide but is now above this line thanks to reclamation.

LPC is embarking on a long-term plan to develop a modern container terminal at Te Awaparahi Bay. This C&R project, which has a duration of more than two years, involves dredging a section of seabed and replacing it with an engineering bund containing 
about 850,000 tonnes of selected material extracted from the local quarry, about 1.5km from the port.

The overall project has various stages, removing soft sediments by dredging, constructing the bund, and end tipping into the sea with a bulldozer/excavator.

A combination of blasting, excavation, screening, stockpiling, carting and placing material, will be handled over the next two years. Some 2.6 million tonnes of material is required to be excavated, carted and placed into the new reclamation area to extend the port by six hectares.

This project has benefited from a comprehensive site investigation, which included drilling on-shore and off-shore boreholes. It is believed that the design and analysis experience can be applied to similar infrastructure design in New Zealand.

More than 2.4 million tonnes of earthquake demolition material and rubble has gone into the reclamation. Much of it is from buildings in Christchurch that were demolished after the earthquakes.

This has saved Christchurch and the surrounding region more than $100 million in dumping costs. It has also provided fill for the reclamation so the Port can expand to meet the forecast increase in customer requirements and the region’s future growth in container trade.

LPC’s environmental management plan for the reclamation aims to minimise and mitigate any environment impacts and to support the ecological health of the harbour. Extensive monitoring controls are in place to mitigate any environmental impacts and to support the ecological health of the harbour.

Triple-shaft technology
The Warrior 2400 has been specially designed for large-scale producers in the quarrying and mining sectors and is capable of handling larger feed sizes and throughputs. It features a heavy-duty screen with a high amplitude triple-shaft drive mechanism, lending it to the most demanding screening, scalping, two- or three-way splitting and stockpiling applications.

Its benefits include a slide-out tail conveyor facility to aid media access and a load-sensing collection conveyor circuit to avoid blockages. It has an output potential of up to 800 tonnes per hour, an aggressive heavy-duty triple-shaft screen, with adjustable frequency, amplitude and stroke angle, and a jack-up screen facility to aid screen media changes.

Lincom worked closely with C&R Developments to understand its specific requirements and to provide the best solutions. “C&R needed big tonnage for the Lyttelton Port project and the Warrior is the biggest scalper on the market,” said the Lincom Group’s marketing manager Catrina Quinn. “It is 20’ x 6’ (6m x 1.8m) on both decks, top and bottom.”

By meeting these standards, Lincom complies with steps to ensure the safety of workers and the proper functioning of the plant. These codes of practice also assist with the risk assessment of the machine during commissioning.

“The Warrior 2400 is different to everything else on the market,” Quinn said. “It’s the only scalper with triple-shaft technology, meaning both the amplitude and the direction of throw can be altered – and independently of each other. This gives the ability to accurately tune the machine to the specification application, maximising quality and throughput of the finished product.”

The Lincom Group is headquartered in Brisbane, with offices and warehouses in every state and territory, New Zealand, Papua New Guinea, New Caledonia and other Pacific Islands. In addition to the Powerscreen range of mobile plant and equipment, it is also the distributor of sand and aggregates processing equipment, filter presses, stackers and mobile conveyors, mobile and fixed plant trommels, and static and mobile recycling plants. •

Source: The Lincom Group

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