化工矿物与加工2026，Vol.55Issue(8)：52-58,7.DOI:10.16283/j.cnki.hgkwyjg.2026.08.007
广东某高岭土尾砂工艺矿物学研究及其高纯石英砂提纯潜力评估
Study on process mineralogy of a kaolin tailing in Guangdong and evaluation of purification potential of high purity quartz sand
摘要
Abstract
High-purity quartz sand is an indispensable key raw material for semiconductor,photovoltaic and high-end optical industries.In order to realize the resource utilization of solid waste,a sedimentary rock weathering residual kaolin tailings in Guangdong was used as raw material,and its process mineralogy characteristics were systematically characterized by analysis means of X-ray diffraction,X-ray fluorescence spectroscopy,stereomicroscope and transmis-sion polarizing microscope.The purification potential was evaluated by the combined process of'scrubbing-magnetic separation-flotation-acid leaching-calcination-secondary acid leaching'.The results show that the+0.25 mm fraction sample in the raw ore has the characteristics of high silica content and low gangue mineral content,which can be used as the preferred raw material for the preparation of high purity quartz.After the combined process,the purity of silica in the obtained quartz concentrate is 99.98％(3N8),and the total impurity mass fraction is reduced to 187.03 μg/g.The mass fractions of aluminum and iron are 94.79 μg/g and 8.50 μg/g,respectively,which meet the requirements of JC/T 2314-2015"Silicon raw materials for photovoltaic glass".However,the micron-sized solid inclusions remaining inside the quartz particles are the main factors restricting the further improvement of its purity to 4N5 level.The kaolin tailings have good potential for preparing high-purity quartz sand,but to obtain higher purity products,it is still necessary to further develop a targeted deep removal process for solid inclusions.关键词
高岭土/尾矿/工艺矿物学/提纯/高纯石英/石英砂/包裹体/二氧化硅Key words
kaolin/tailings/process mineralogy/purification/high purity quartz/quartz sand/inclusions/silicon dioxide分类
矿业与冶金引用本文复制引用
冯杰,巢力,代雷孟,苏信汀,孙红娟,任涛红,刘波..广东某高岭土尾砂工艺矿物学研究及其高纯石英砂提纯潜力评估[J].化工矿物与加工,2026,55(8):52-58,7.基金项目
中国建筑材料工业地质勘查中心揭榜挂帅项目(建地科[2022]04号) （建地科[2022]04号）
中非高岭茂名新材料有限公司企业横向项目(ZF-GL-JSZX-20250120-1). （ZF-GL-JSZX-20250120-1）
