At Longcliffe, we process pure limestone at our Brassington Moor Quarry, as well as quality dolomite aggregates at our Ryder Point Quarry.
Our base limestone deposits are of an exceptionally high quality, typically measured as 99.5% pure calcium carbonate. This purity, combined with sophisticated production techniques, enables us to offer a broad range of products – over 100 in all.
From large natural block to fine granules and powders we can supply calcium carbonate for demanding applications including glassmaking, rubber, carpet-backing and architectural structures.
Extraction and Processing of Quality Limestone
The extraction process begins some time before the blasting. To plan the phasing of the quarry development, boreholes are drilled to analyse the geology of the limestone and identify the location of the most pure material.
Once the quarry plan has been agreed, ‘overburden’ (the soil lying on top of the rock) is stripped. Then state of the art technology is used to plot the locations for the explosives drill holes.
The rock face at the quarry has to be drilled and blasted to produce stone feedstock. This is taken to the plant where it undergoes a variety of processes including crushing, drying, milling, screening and classification to produce a wide range of high quality aggregates, granules and fine powders. Continuous re-processing of any by-products ensures waste from our operations is eliminated.
