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<p>Based on process mineralogical analysis, a three-stage physical purification process (scrubbing, magnetic separation, and flotation) was developed to purify quartzite ore. The mechanism of each stage was systematically investigated, revealing that scrubbing effectively removes iron minerals and partially disintegrates chlorite layers. Magnetic separation utilizes the inherent magnetic differences among minerals to remove impurity minerals, such as hematite, magnetite, and biotite, from quartz. Flotation, on the other hand, utilizes the selective adsorption of lauryl amine to separate muscovite from quartz. Through this comprehensive approach, the SiO<sub>2</sub> content in the quartz sand increased from 98.895% to 99.627%, while the Al<sub>2</sub>O<sub>3</sub> content decreased from 0.178% to 0.118%, and the Fe<sub>2</sub>O<sub>3</sub> content decreased from 0.349% to 0.065%. The final quartz sand can be directly used in products such as refractory silica (GSN99A/B) and industrial silica (GSG99A/B), or it can be further chemically purified to serve as raw materials for higher-end products. This study presents an efficient and practical approach for purifying quartz sand through physical methods.</p>

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Experimental Investigation and Mechanism Analysis of Quartzite to Quartz Sand: Process Mineralogy-oriented Physical Purification Technology

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Wencheng Li,
  • Zhijun Ma,
  • Xingyuan Weng,
  • Yunsheng Zheng,
  • Hao Guo,
  • Yushu Wang,
  • Huiling Xing,
  • Lin Zhao,
  • Linfeng Cheng

摘要

Based on process mineralogical analysis, a three-stage physical purification process (scrubbing, magnetic separation, and flotation) was developed to purify quartzite ore. The mechanism of each stage was systematically investigated, revealing that scrubbing effectively removes iron minerals and partially disintegrates chlorite layers. Magnetic separation utilizes the inherent magnetic differences among minerals to remove impurity minerals, such as hematite, magnetite, and biotite, from quartz. Flotation, on the other hand, utilizes the selective adsorption of lauryl amine to separate muscovite from quartz. Through this comprehensive approach, the SiO2 content in the quartz sand increased from 98.895% to 99.627%, while the Al2O3 content decreased from 0.178% to 0.118%, and the Fe2O3 content decreased from 0.349% to 0.065%. The final quartz sand can be directly used in products such as refractory silica (GSN99A/B) and industrial silica (GSG99A/B), or it can be further chemically purified to serve as raw materials for higher-end products. This study presents an efficient and practical approach for purifying quartz sand through physical methods.