Many people wonder how industrial-grade quartz sand with purity above 99% is purified. High-purity quartz sand production involves no mysterious tricks; it relies on four key procedures. However, the most critical yet easily overlooked step is the preliminary crushing and screening, which serves as the foundational first step for successful purification.
Large raw quartz ore contains abundant impurities and inconsistent particle sizes. Skipping fine crushing and screening will greatly reduce the efficiency of all subsequent purification processes. Multi-stage crushing combined with vibrating screen screening unifies ore particle sizes, screens out mud lumps and waste rock, and removes most surface impurities in advance to pave the way for follow-up procedures.
With solid pre-treatment completed, the material then goes through four core steps in sequence: desliming, mechanical scrubbing, magnetic iron removal, and flotation for mica removal, to eliminate trace impurities layer by layer. This conventional process can raise quartz sand purity above 99% to meet industrial requirements. For higher-purity quartz sand, advanced fine purification techniques such as acid leaching and bioleaching will be additionally adopted.
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