Subramanian, R B V and Machhoya, B B and Vyas, D R and Sojitra, B G and Dan, Tapan Kumar (1992) Studies on beneficiation of Kachch sandstones. Transactions of the Indian Ceramic Society, 51 (5). pp. 113-117. ISSN 0371-750X

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Four samples of sandstone collected from Anjar taluka of Kachch district, Gujarat State, India were studied to develop applicable beneficiation routes. The sandstones were friable in nature, off white to white in colour, assaying from 90 to 96% silica content, with minor amounts of Al2O3 (1.5 to 5.0%), CaO (0.90 to 3.40%), trace amounts of TiO2 (0.13 to 0.28%) and iron oxides (0.10 to 0.35%). Petrography and XRD analyses revealed clay, feldspar and calcite as the major impurities. The samples were crushed and sieved into various size fractions. Sizing followed by attrition scrubbing with water as medium brought down the iron content from 0.17 to 0.10%. Scrubbing with mild alkali/acid medium further reduced it. The most impure sandstone sample was further investigated to explore the possibility of beneficiation. After sizing the crushed sand with a nest of sieves, the coarse sand fraction retained on 500 μm sieve was attrition ground with pebbles and sieved again. The ground sand along with the medium fraction passing through 500 μm sieve but retained on 125 μm sieve was scrubbed with water. The Iron content was brought down to 0.05% with further chemical treatment. The resultant sandstone product conformed to Grade I glass sand of the relevant Indian Standards Specification.

Item Type: Article
Subjects: Cements, Limes, Plasters
Depositing User: Bidhan Chaudhuri
Date Deposited: 02 Dec 2013 13:09
Last Modified: 05 Mar 2016 14:16

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