Glass Industry
Specifications and Applications of Quartz in the Metal Industry Quartz (Silica) Granules
The physical specifications for silica sand require it to be mostly free from contaminants such as clay, pebbles, and other foreign materials. The sand should contain no more than 4% moisture.
Natural silica sand is the preferred material in the glass industry. However, when glass plants are located far from silica deposits, crushed quartz may be used. For glass production, the silica sand must have consistent chemical composition, grain size, and shape. A uniform grain size ensures even melting in the glass tank. The sand should not be coarser than 20 or 30 mesh, nor finer than 100 to 120 mesh.
Silica sand typically contains trace amounts of iron oxide, alumina, chromium, magnesium oxide, calcium oxide, and potassium oxide, as these elements contribute to the coloration of the glass. The acceptable limits for iron oxide in silica sand used in glass manufacturing range from 0.005% to 0.7%, depending on the type of glass being produced.
Our Specifications :
- SiO₂ content : 99.8% and above.
- Available sizes : 30/50, 30/80.
- Fe₂O₃ content : 0.002% to 0.008%.
- Al₂O₃ : Nil or a maximum of 0.05%.
- Free from contamination.
Specification of Natural Silica :
- SiO₂ content : 99%.
- Available sizes : 30/50, 30/80.
- Fe₂O₃ content : 0.04%.
- Al₂O₃ : Nil or a maximum of 0.005%.
- Triple washed.
- Free from contamination.
