METHOD OF DRY CONCENTRATION OF QUARTZ SANDS Russian patent published in 2014 - IPC B07B9/00 

FIELD: construction.

SUBSTANCE: method of dry concentration of quartz sands includes drying of a product to remove natural moisture to catch fraction of -0.10 +0 mm for discharge of quartz dust into a separate finished product, sieving with direction of the plus material into a dump, and the minus material for classification, carried out after sieving with discharge of the production with fraction -0.10÷0.25+0 mm into finished product and supply of the fraction -0.40÷0.80+0.10÷0.25 mm of the product to magnetic separation, which is carried out to produce magnetic fraction sent to the dump, and finished quartz concentrate. Classification is carried out in an air classifier with production of three product fractions. The fraction -4+0.40÷0.80 mm of the product produced in classification is sent to the finished product - fractionated quartz sand or for grinding. The fraction -0.40÷0.80+0.10÷0.25 mm of the product is sent for attrition by dry method, which is carried out to discharge the product of the fraction -0.10÷0.25+0 mm into the finished product - fractionated quartz sand and production of the production of the fraction -0.40÷0.80+0.10÷0.25 mm, which is sent for magnetic separation.

EFFECT: increased efficiency of concentration, production of a quartz concentrate for glass industry of higher quality.

3 cl, 4 dwg