Review demonstrates targeted thermal and chemical mechanisms for deep quartz purification, highlighting greener processing pathways for high-purity materials.
High-purity quartz processing currently faces three critical factors: depleting reserves of high-grade natural ore, inadequate impurity removal efficiency, and heavy environmental pollution driven by traditional refining methods. Therefore, this article first introduces the reasons for the formation of different types of impurities in quartz, as well as the methods and difficulties in removing different types of impurities. Then, a comprehensive summary was made of the current research progress and purification mechanism of quartz purification technology. The study of acid leaching kinetics in quartz purification can accurately determine the optimal operating parameters and support process scaling up. Calcination treatment has been verified to achieve efficient impurity removal. Specifically, the phase transformation and vacuum calcination behaviors during thermal treatment dominate the impurity elimination mechanism. Correspondingly, targeted and efficient purification strategies are proposed to remove different categories of impurities. The future quartz purification holds strong potential in several key areas. These include optical sorting, microwave-assisted calcination furnaces, biological surfactants, and fluoride-free acid leaching. Additional high-potential directions involve rapid macroscopic identification methods for quartz ore and the extraction of quartz from solid waste.
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Wang et al. (2026) studied this question.
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