The Grudzeń Las sand plant exploits the deposits “Grudzeń Las” and “Piaskownice Zajaczków Wschód” located in the valley of Tomaszow. Sands from that area began to be used as early as the late 19th century. The Grudzeń Las site began to be exploited in the 1930s. The first application of the sands, in their raw state, was in the foundry industry.
Requirements of heavy industry on sand quality in the 1970s contributed to hydraulic classification based on Austrian technology being implemented at the “Grudzeń Las” silica sand plant in 1974. The company “Kopalnia Piasku Kwarcowego Grudzeń Las Sp. z o.o.” began independent activity on 1 June 1988.
The company’s objective is to produce moulding and glassmaking sands of the highest quality grade. New equipment and the latest machinery contribute to achieving these requirements. Physical and chemical monitoring make a great contribution to the quality assurance of all products.
In addition to the above products, the company produces filtration gravel, technical sands, kaolin, silica and dolomite flours.
Grudzeń Las Sp. z o.o. successfully certified its processes in 2005.
The company’s philosophy has evolved over time into its present form, when Grudzeń Las Sp. z o.o. became part of the Atlas Group. This exclusively Polish capital accelerated the rate of growth of the sand plant, which today includes two production complexes, namely Grudzeń Las and Syski plant.
Based on the high requirements of not only Polish but international markets for silica moulding sands, glasswork sands and filtration gravels, the company has built a new complex in the SYSKI area, lying about 5 km from the Grudzeń Las sand plant.
This is why the company includes two separate production complexes today:
Both deposits provide slightly weathered sandstone dating from the Cretaceous period. The raw material is processed using a hydraulic classification method. Following the classification, the sands and gravels are transported to process boxes and, after dehydration, they leave for dispatch boxes.
The kaolin, produced by separation from sand fractions and sedimentation without any chemical additions, is then compressed in box presses. The compressed kaolin is stored in a dry environment to prevent it from regaining moisture.
Moist sands are dried in modern drying kilns, which are followed by cooling equipment. The dried materials are stored in storage tanks or transport packaging.