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Glass is an ancient and at the same time modern material, it is very diverse in terms of applications in both everyday life and in high-tech products.
Plate glass and container glass are produced mainly as so-called soda lime glass from silica sand, soda and limestone and/or dolomite. The oxides from these raw materials are responsible for the chemical and physical properties as well as for the glass melting process.
Glass is 100% recyclable. Alongside the primary raw materials, processed pieces of recovered glass also play an important role in glass production.
Soda lime glass makes up by far the greatest quantity of all industrially produced glass. As the name suggests, soda and lime, alongside sand, play an essential role as components. A typical soda lime glass consists of 10 to 15% CaO or CaO + MgO. In practice, soda lime glass is used in the production of drinks bottles, food jars, simple drinking glasses and plate glass. For the most part, limestone and dolomite provide the necessary CaO und MgO portions of the glass. In particular, dolomite ( MgO ) has a positive effect both on the melting process and the properties of the glass.
Lhoist supplies the glass industry with pure dolomite and limestone products of consistent chemical composition and particle size under the VISUCAL® brand.
Also, our SORBACAL® products based on lime hydrate are tried-and-tested additives effective for the treatment of flue gas for glass melting tanks for separating out SO2 und HF amongst other things.