Sheet glass

Sheet glass recycling – highest quality

Basically, there are two types of sheet glass. Rolled glass is more often than not cast glass that is ornamented and opaque. Float glass is transparent window glass. Broken sheet glass occurs in the production of glass windows and doors and can serve for many future functions. Other sheet glass types like wired glass or laminated glass from mirrors and car windows are not directly melted but treated in recycling companies.

Glass granulate of different grain sizes

For further processing, the material is crushed in different crushers to grain sizes between 1 and 40 mm. Plastic parts, metals, stones and ceramics are removed using magnets or by manual sorting. Small foil particles are filtered out. After sorting according to colour, the glass granulate can be transformed into flawless new glass products.

A primary focus on float glass

The sheet glass cycle for transparent float glass is particularly exciting. For producing float glass, the finely ground primary raw materials and glass granulate are melted at a temperature of about 1600°C. When the molten glass has cooled to approx. 1,000°C, the required final product can normally be formed. For producing float glass, clean potsherds are directly introduced into the production process. The sheet glass shards must not contain any contaminants, because the quality requirements applying to sheet glass are particularly stringent when it comes to transparency and visual qualities. To achieve the optimal shape, the glass is poured into a liquid zinc bath, which has an ideally smooth surface for hardening.