High-Purity Quartz
High-Purity Quartz from Quartzite Resources
Y. Huang, L. Sun, Y. Du, J. Liu, X. Yang
Abstract
A mineralogical and purification study demonstrates 4N8-grade quartz (99.998% SiO₂), reducing total impurities to approximately 17.14 ppm.
High-Purity Quartz from Quartzite Resources
High-purity quartz (HPQ) is a strategic material for semiconductor manufacturing, specialty glass, optical technologies, and advanced industrial applications.
A 2025 study examined the purification potential of quartzite from the Hengshan region in China, demonstrating the importance of mineralogical characterization and multi-stage processing.
Key Research Findings
Researchers achieved:
SiO₂ purity: 99.998% (4N8 grade).
Total residual impurities: Approximately 17.14 ppm.
Major impurities investigated: Aluminum, iron, potassium, sodium, and other trace elements.
Mineralogical improvement: Significant reduction of mineral and fluid inclusions in the purified concentrate.
Purification Technologies
The study evaluated integrated processing operations, including:
Thermal treatment and particle-size preparation.
Gravity and magnetic separation.
Flotation and ultrasonic desliming.
High-temperature acid leaching.
Mineralogical and trace-element characterization.
Industrial Significance
The findings demonstrate that suitable quartzite resources can potentially be upgraded into high-purity quartz products through carefully selected processing technologies.
The feasibility of purification depends on the original mineralogy, impurity distribution, inclusions, processing efficiency, and economic conditions.
For SilexTech, this research provides a scientific reference for evaluating Mexican silica resources and potential high-value product pathways.
The reported results apply to the specific Chinese quartzite investigated, not to materials already processed by SilexTech.
Original publication: Huang, Y., Sun, L., Du, Y., Liu, J., & Yang, X. (2025). A potential 4N8-Grade raw material for high-purity quartz from quartzite ore in the Hengshan region, central-southern China: A geochemical-mineralogical study and purification.
Journal: Solid Earth Sciences, 10(4), Article 100276.
Source: https://doi.org/10.1016/j.sesci.2025.100276
Independent academic research presented by SilexTech for technical reference. Findings are not SilexTech experimental achievements.
