高纯石英原料矿物学特征与加工技术进展

Mineralogical Characteristics and Progress in Processing Technology of Raw Materials of High Purity Quartz

以天然石英矿物为原料是获取广泛应用于高科技领域重要非金属矿物材料高纯石英的主要途径。天然石英矿物中杂质元素赋存状态是选择正确高纯石英原料和制定最佳石英提纯方案的重要参考,通过分析不同杂质可选性,得出矿物包裹体、流体包裹体和晶格杂质含量决定了石英矿提纯加工后最终质量。高纯石英加工过程就是尽可能完全分离出天然石英矿物中各种杂质。通过分析石英中共伴生独立矿物分选、包裹体杂质分离和晶格杂质脱除加工高纯石英技术,认为物理分选过程中分离独立矿物杂质、连生体矿物杂质和包裹体杂质,是今后高纯石英加工中必须重视的问题;同时指出流体包裹体爆裂、氯化脱气和晶格杂质脱除技术与机理有待进行更加深入研究。在此基础上提出了关于我国高纯石英的发展建议。

Using natural quartz minerals as raw materials has been the main way to obtain high-purity quartz, which is widely used in high-tech fields as an important non-metallic mineral material. The occurrence state of impurity elements in natural quartz minerals is an important reference for choosing the right high purity quartz raw materials and formulating the best quartz purification scheme. Based on the analyzing of the beneficiability of different impurity, it is concluded that mineral inclusion, fluid inclusion and lattice impurity content jointly determine the final quality of quartz ore after purification and processing. The processing of high-purity quartz is to separate all kinds of impurities from quartz as completely as possible. By analyzing the separation of associated independent minerals, inclusion impurities and lattice impurities in quartz for processing high-purity quartz, it is considered that the physical separation of independent mineral impurities, conjoined mineral impurities and inclusion impurities must be paid more attention in the future. Meanwhile, it is pointed out that the technology and mechanism of explosion of fluid inclusions, chlorination degassing and removal of lattice impurity need to be further studied. On this basis, suggestions on the development of high purity quartz in China are put forward.