Abstract: In order to make efficient use of a quartz ore in Inner Mongolia，the key technical parame⁃ ters of separation were determined on the basis of the study of ore properties，aiming at the problems of many impurity minerals and difficult separation of aluminum and silicon in the quartz ore. Quartz concen⁃ trates with SiO2 grade of 99.29%，Al content of 0.25%，Fe content of 0.03%，Ba content of 0.06%，Ti content of 0.02%，K content of 0.13% and S content of 0.02% can be obtained by desliming-magnetic sep⁃ aration-flotation physical purification process. Quartz concentrate was purified by chemical purification pro⁃ cess. With the hydrochloric acid concentration of 30%, hydrofluoric acid concentration of 30%, mixed re⁃ agent ratio of water, hydrochloric acid and hydrofluoric acid is 5∶3∶2, slurry solid ratio of 3 mL/g, stirring intensity of 200 r/min, leaching temperature of 90 °C and leaching time of 2 h, high purity quartz sand con⁃ centrate with SiO2 grade of 99.923 7% and total impurity elements of 763 μg/g can be obtained. The highly effective utilization of quartz ore is realized.

Key words: high-purity quartz, purification process, comprehensive utilization