Quartz sand (silica sand) is mainly derived from quartzite and vein quartz, which is accompanied by feldspar, mica and clay minerals, while vein quartz is accompanied by feldspar, mica, cuttings, heavy minerals, clay minerals and so on. Although the structure formed by quartzite and vein quartz is different, the composition is similar, so the selection of the mineral processing technology is similar. In the quartz sand extraction process, because there are fewer impurities in the raw ore, the main beneficiation process is to purify and remove a small amount of impurities in quartz sand. Currently, the processes used include: classification and desliming, scrubbing, magnetic separation, flotation, acid leaching and so on.
How to Improve the Fineness in Grinding Quartz Sand
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The quartz ore has good wear-resisting. Ordinary grinding quartz sand process may not achieve a good grinding effect, as well as the grinding process consumes a lot of energy. Thus, we can improve the grinding efficiency and grinding fineness by add grinding aid dosage during the grinding process. The available grinding aids are sodium chloride, ammonium chloride, sodium oleate, triethanolamine, etc., where in the grinding effect of adding ammonium chloride is relatively good.
It is necessary to pay attention to the amount of grinding aid dosage when using it. In a certain range, the more grinding aids you add, the finer grinding fineness you get. Once beyond this range, the increase of grinding aid dosage will cause the grinding fineness to decrease. Therefore, it is necessary to determine the amount of grinding aid dosage by testing before use.