18 Quartz, Quartzite, and Silica Sand
Quartzite is used in the manufacture of silica refractories and as a flux in iron , plants are located far away from silica deposits, crushed quartz is also used For use in glass industry the silica sand must be uniform in chemical , Indian standards (IS: 3343 - 1965) specification for natural moulding sand for use in foundri...


