The granite crushing project at the quarry comprises preparation, multi-stage crushing, safety controls, environmental measures and quality control of the fractions for the construction industry.
A granite crushing project in a quarry comprises a series of interlinked operations for the extraction and processing of hard rock into standard sizes for the construction industry; its effective organisation ensures high productivity, reduced costs and compliance with environmental standards at all stages of the work.
At the initial stage, geological exploration of the deposit is carried out to assess the granite reserves, its strength characteristics and the presence of impurities, after which a plan is drawn up for accessing the deposit, rock transport routes and a plan for the placement of crushing equipment, taking into account the topography of the quarry, in order to minimise the costs of moving raw materials.
Granite crushing takes place in several stages: the primary coarse-crushing machine breaks large boulders into pieces up to 30 centimetres in size, secondary and tertiary crushers process the raw material to the required particle sizes, whilst vibrating screens separate the resulting particles by size, sifting out substandard material for reprocessing.
At the quarry, restricted-access zones are always set up whilst crushing equipment is in operation; regular inspections of the machinery’s components are carried out to prevent breakdowns; and all workers are provided with personal protective equipment against dust, noise and falling rock debris; compliance with these standards prevents injuries and production downtime.
To reduce dust emissions at all stages of crushing, sprinkler systems and vacuum filters are installed; the wastewater from washing the fractions is sent to treatment plants for reuse, whilst processing waste is used to backfill excavated areas of the quarry, thereby preventing pollution of the surrounding areas.
Finished granite aggregates are regularly tested for compliance with national standards regarding particle size, strength and the absence of clay impurities; selected samples are tested in the laboratory, and batches that do not meet the requirements are returned for re-crushing, which guarantees the consistent quality of the products supplied to construction sites.
