Silica sand forms the major ingredient among natural raw materials required for glass making and it is also used in foundry, ferro-silica alloy and cement industries besides being used in many other industries like ceramic, fertilizer, abrasives, chemical, coal washery, electrode, paint, rubber, textile, water filtration, construction etc.
Silica sand is produced by crushing sand stone or quartzite of open texture, and washing and garding it to yield requisite grain distribution.
Silica flour is produced by crushing grinding and washing the high grade quartz, quartzite rocks or from white silica sand.
CHEMICAL COMPOSITION: Sio2 the general impurities are iron/aluminium oxides and lime.
PHYSICAL CHARACTERS: Sandstone is a friable & hard. The grain size of the particles is variable. it is friable & mainly brown to grey in colour.
SPECIFICATION: Glass making sand IS 488 - 1963. Indian Standard for silica sand used for glass making.