All beneficiation methods which were tested increase the purity of the sand above minimum high-silica specifications. The best results were obtained, however, with a water-washed sand placed in an 18 N solution of sulfuric acid for a period of 40 minutes at a temperature of 140ø C. This leaching method produced a sand that meets specifications for the first quality glass sand.
Pinsak, A. P. 1956, High-silica sand potentialities of the Ohio River Formation: Indiana Geological Survey Bulletin 09, 54 p., 7 fig.
You may also like:
Can't find what you're looking for? Feel free to contact us directly:
Publication Sales Office
Indiana Geological and Water Survey
420 N. Walnut St.
Bloomington, IN 47404
IGS Return Policy
All sales are final. Materials may not be returned after they have been accepted by the customer. Any discrepencies in mail orders must be reported to IGWS within 10 days of receipt of order.
The Indiana Geological and Water Survey will refund the purchase price and sales tax of products if returned with the original sales receipt within 10 days of receipt of order. Refunds will be issued with the same method of payment as indicated on the original receipt except for cash purchases, which will be refunded by check. Items must be returned in the same condition as purchased. Refunds on digital products and services are not allowed, except for defective media such as CD-ROMs, flash drives, and so on. The customer is responsible for paying shipping costs to return items.