Abstract: A large number of quartzite ore with 98.86% SiO2 have been discovered in Hubei. In order to obtain high-quality quartz products， beneficiation purification experiment was conducted. Firstly， the samples were screened into three sizes of +0.6 mm， 0.1~0.6 mm and - 0.1 mm. -0.1 mm particle size product was discarded as tailings directly. Magnetic separation-flotation-acid leaching process was conducted on 0.1~0.6 mm particle size. Firstly， iron in ore is removed by high gradient high intensity magnetic separation. Mica in non-magnetic products are removed by one roughing one cleaning reverse flotation with oxalic acid as inhibitor and dodecyl amine as collector. Finally， quartz sand with 99.79% SiO2， 73.70×10-6 impurity Fe2O3 and 90.93% whiteness can be obtained from flotation concentrate by acid leaching with mixed acid of hydrochloric acid and sulphuric acid as leaching agent and acid leaching at 60 ℃ for 6 h，which can be used not only as photovoltaic glass quartz sand， but also as quartz plate. Quartz sand with 99.85% SiO2 and 62.65×10-6 impurity Fe2O3 can be obtained by acid leaching with +0.6 mm particle size and color separation， which meets the quality requirements of quartz plate.

Key words: Quartz purifying, Classification, Flotation, Acid leaching