Investigation of the Kinetics of Hot Press Leaching for Low-Grade Vein Quartz
To resolve the problem of high impurity content in low-grade vein quartz,we used vein quartz from Lingqiu Mountain in Qichun,Hubei Province as the raw material to investigate the effects of liquid-solid ratio,reaction time,and reaction temperature on impurity removal efficiency.The results showed that after purification by the hot-press leaching process,the SiO2 content in quartz sand increased from 97.766%to 99.974%,and the removal rates of major metallic impurities significantly improved.The Avrami kinetic model revealed that the impurity removal process was jointly controlled by internal diffusion and chemical reactions.These findings provided theoretical and practical guidance for optimizing the purification process of vein quartz.
hot press leachingkinetic analysisquartz sandnon-metallic mineralsremoval of impuritiespurification technology
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