TITLE:
Evaluation for the Beneficiability of White Silica Sands from the Overburden of Lignite Mine situated in Rajpardi district of Gujarat, India
AUTHORS:
M. Sundararajan, S. Ramaswamy, P. Raghavan
KEYWORDS:
White silica sand, Beneficiation, XRD, SEM, Magnetic separation
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.8 No.9,
September
20,
2009
ABSTRACT: A representative feed sample of White Silica Sand was wet-sieved in order to recover the desired
fractions for glass making. BIS specification shows that (–600, +300) μm] fraction [A] should
not be more than 50% and (–300, +125) μm fraction [B] should be 50% minimum. The mass
percentage of A and B is found to be 29.9 and 70.1% (ratio =1:3.34) which satisfies the size
specifications for glass making sand. Hence, this ratio was maintained for all the down stream
processing studies. ‘Wet Sieved desired Fraction for White sand’ (WSDFw) was subjected to
attrition followed by magnetic separation. Tests at optimum conditions gave a non-magnetic
fraction (Silica sand product) which analysed 98.1% silica with 0.09% Fe2O3, 0.13% TiO2 and 0.17 LOI. This is found to be matching with IS specifications for Grade III sand.