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The larger the
slabs, the higher their value
Veneri & Casagranda were among the first to renew production techniques, both by
introducing new machines and by structuring the production process to obtain a modern and
functional organisation of work.
Extraction
The porphyry is extracted in open-cast
quarries on quarry fronts arranged in benches of heights between 10 and 30 metres.
The porphyry, once split from the bedrock using soft blasting, is separated with power
shovels from the waste material, and the stone that can be processed is sent to the yards
for further selection.
The larger blocks are split using pneumatic drills to formats suitable for processing. The
blocks are then split again along their natural planes with hammers and wedges to obtain
slabs of varying size and thickness.
The slabs can now be sorted as to quality, thickness and size. These slabs are taken to
the final processing area, where sophisticated machinery allows production of a wide range
of articles and types of product, to enable a highly diversified market offering.
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