silica beneficiation in pretoria
Delf Sand Mine Infrasors. The Delf Sand Mine specializes in the mining and beneficiation of an alluvial sand deposit loed at Donkerhoek near Cullinan. The alluvial deposit is opencast mined for its high silica content (SiO2 greater than 96%). A by product of the opencast mining is the recovery of a high quality plaster sand which is supplied ...