Dry Beneficiation of Kyanite Ores | Refractories and
Metastable minerals of the sillimanite group (andalusite, sillimanite, and kyanite), having the general formula Al 2 O 3 ⋅SiO 2 and theoretical contents of Al 2 O 3 and SiO 2 respectively equal to 62.9 and 37.1 mass %, are widely used as an alumosilicate raw material in the refractories industry. The volumes of andalusite, sillimanite, and …