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.