Economically efficient processing of natural stone and recycling materials

Natural crushed stone and recycled materials in graded grain sizes are used as standard aggregate for concrete, as well as for base, binder and surface courses in road and building construction. But how are large chunks of rock converted into aggregate of defined size?

Processing of natural stone

When processing natural rock, larger rocks are broken up into defined grain sizes in a multi-stage crushing and screening process. If the rock is processed in mobile plants, excavators transfer the blasted rock to crushers which are usually located directly alongside the quarry wall.

The crushed stone is then either transferred directly to the next processing stage on conveyor belts or removed by trucks. Alternatively, the broken material can also be removed by heavy-duty trucks. Excavators or wheeled loaders load the rock onto trucks at the quarry wall for transport to the stationary processing plant.

Processing of recycling material

In addition to reinforced concrete, asphalt and bricks, rubble and mixed construction wastes are separated into their useful components by mobile crushers or stationary crushing and sorting machines.

A combined process of crushing, screening and separating metal is an efficient means of processing material to be recycled. To obtain an end-product of even higher quality, further process steps can be added, such as washing, eliminating such light materials as plastics and paper with the aid of air classification, and additional electromagnetic metal separation.

WIRTGEN SINGAPORE is a member of the WIRTGEN GROUP, an internationally operating group of companies in the construction machinery sector incorporating the traditional product brands: WIRTGEN, VÖGELE, HAMM, KLEEMANN and CIBER. As technological leader, we can offer our customers mobile machine solutions for road construction and road rehabilitation, plants for mining and processing minerals or recycling material and for the production of asphalt.
Our ratios: In 2016 the WIRTGEN GROUP generated consolidated sales of 2.59 billion euros. Presently the WIRTGEN GROUP employs 8,000 people.

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