Silica sands for glassworks are required to be of the utmost purity, meaning SiO2 content of at least 99,2 % and low contents of Fe2O3, Al2O3 and TiO2. Our silica sands are supplied to window glass manufacturers worldwide for solar glass and colourless, packaging and technical glass. Our sands are also used for glass batches which are in turn used for soluble glass manufacturing. An equally essential application is in glass wool production for the construction industry.
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.
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.
Laboratory instruments from the MULTISERW-MOREK company are sought after for their tradition, quality and reliability. The H-GLOST company, a prominent sales representative for the Czech Republic and Slovakia, provides complete supplies of the entire range of products. We are not the best in the world, which is why we provide you, our customers, with all warranty and post-warranty repairs directly in the MULTISERW-MOREK company. This guarantees our customers that all spare parts are original and that the software used is updated.
Our laboratories at Grudzeń Las sand plants and the H-GLOST laboratory have these products installed and we use them to our full satisfaction. Therefore, we only offer such products of which we are convinced, based on our experience, that are of high quality.