The paper shows the results of an investigation carried out to enhance the value of two commercial products currently destined for ceramic industry and to beneficiate the non-magnetic fraction of a granite quarry waste, applying electric separation techniques based on triboelectric charging and the use of a free-fall chamber. The test conducted on the k-feldspar/quartz commercial product, with 5,7 % K2O content, shows that is possible to obtain a 9,7 % feldspar concentrate and a quartz product with less than 1 % K2O content, preheathing the feed, without the use of additives. As concern granite quarry waste, the results obtained without the use of additives and pre-treating the feed material with HF and NaOH solutions are compared. It has been found that the pre-treatment with the above mentioned reagents enables to obtain marketable feldspar and quartz products.
Use of triboelectric Techniques for Separating Feldspar from Quartz
SERCI, ANTONELLO
2010-01-01
Abstract
The paper shows the results of an investigation carried out to enhance the value of two commercial products currently destined for ceramic industry and to beneficiate the non-magnetic fraction of a granite quarry waste, applying electric separation techniques based on triboelectric charging and the use of a free-fall chamber. The test conducted on the k-feldspar/quartz commercial product, with 5,7 % K2O content, shows that is possible to obtain a 9,7 % feldspar concentrate and a quartz product with less than 1 % K2O content, preheathing the feed, without the use of additives. As concern granite quarry waste, the results obtained without the use of additives and pre-treating the feed material with HF and NaOH solutions are compared. It has been found that the pre-treatment with the above mentioned reagents enables to obtain marketable feldspar and quartz products.
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