Quartzite is very hard, compact, fine grained, equi-granular homogeneous rocks of metamorphic nature (quartzite) making it an ideal product for use in foundries.chemically they are very resistant mono-mineralic rocks, principally composed of silica. The other minor constituents vary from origin to origin.
High purity quartzite is used to produce ferrosilicon, industrial silica sand, silicon and silicon carbide.
si02 98% - 99.7%
loi less then 0.5%
iron (fe2o3) 0.5%-1.5%
alumina (al2o3) 1 to 1.5%
soda (na2o) & potash (kro) less then 1%
lime (cao) less then 0.5%
magnesia (mgo) less then 0.5%

Quartzite is very hard, compact, fine grained, equi-granular homogeneous rocks of metamorphic nature (quartzite) making it an ideal product for use in foundries.chemically they are very resistant mono-mineralic rocks, principally composed of silica. The other minor constituents vary from origin to origin.
High purity quartzite is used to produce ferrosilicon, industrial silica sand, silicon and silicon carbide.
si02 98% - 99.7%
loi less then 0.5%
iron (fe2o3) 0.5%-1.5%
alumina (al2o3) 1 to 1.5%
soda (na2o) & potash (kro) less then 1%
lime (cao) less then 0.5%
magnesia (mgo) less then 0.5%