Classification and Utilization of Kaolin Tailings from Maoming and Preparation of High-Purity Quartz
Under natural conditions,kaolinite and its associated veinstone minerals show different particle size distributions due to weathering.Since kaolinite and other clay minerals have small particle sizes and the associated minerals such as quartz have large particle sizes,sieving is often used to separate different kinds of mineral resources.In this study,kaolinite tailings from Maoming,Guangdong Province were classified by particle size,and the tailings samples with different particle sizes were tested for chemical composition,phase composition,macroscopic and microscopic morphological characteristics.According to the characteristics of different mineral compositions,the feasibility analysis of grading and utilization of kaolin tailings was carried out to assess the potential of kaolin tailings with different particle sizes as raw materials for quartz purification,and the most suitable part of raw materials for quartz purification was screened out,and the grading and purification and utilization of kaolin tailings yielded high-purity quartz sands with a quartz purity of 99.98%,and quartz sand for photovoltaic glass with a 98.83%quartz purity,which meets the requirements of the JC/T 2314-2015"Siliceous raw materials for photovoltaic glass".
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