This is a fireproof material (more than 1800 °C) whose high temperature resistance makes it ideal for places exposed to the high heat of casting, and not only of steel. Compared to silica sand, it differs in its higher cooling effect, resistance to penetration, and lower thermal expansion. However, its relative density is higher. It also finds application in glass production where glass is tinted, as well as in ceramics.
Dolomite gravels and flours are characterised by a high CaMg(CO3)2 content (min. 90 %) and a low CaCO3 content (only max. 10 %), with a low Fe2O3 content. Dolomite aggregate is crushed and ground at Grudzeń Las into gravels and flours of various grain size. These are mostly applied in glassworks, where the calcium carbonate is used as a stabiliser, modifies viscosity and increases the durability of glass. Another major area of application is the construction industry.
Our kaolin is obtained through the wet removal of clay components from silica sandstone in silica sand production. This is followed by a multi-step process of dehydration in settlement tanks and a final compression. The result is sheets of kaolin with up to 25% moisture content. Our strength is the colour range of the kaolin, from a pale beige to red tones. It is intended primarily for the ceramic industry in the production of porcelain, sanitary equipment, ceramic tiling and glazes.
"It is our endeavour to satisfy every customer,
so do not hesitate to turn to us with even highly specific requirements“