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KMID : 0385520080210040332
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Analytical Science & Technology
2008 Volume.21 No. 4 p.332 ~ p.337
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Impurity variation in high purity silica mineral with different leaching methods
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Yoon Yoon-Yeol
Lee Kil-Yong
Cho Soo-Young
Jung Su-Bok
Chae Young-Bae
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Abstract
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Purification of silica mineral was compared with various leaching methods such as shaking, stirring, ultrasonic with 2.5% HF/HCl solution. Among them, ultrasonic method showed a best leaching effect. From the leaching experiment, Na, K, Fe, Al exist as the major impurity elements. The removal rate of Al, Fe showed little difference with various leaching methods but Ca, Mn, Na were very different. Four kinds of silica mineral (＞99% purity) after physical purification treatment were used for ultrasonic leaching experiment. Among them IN-Si had a highest impurity removal rate. Ca, Cr, K, Zn were removed above 80% using ultrasonic leaching method and Fe was also removed above 60%. But Al showed 10~60% removal rate with different samples.
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KEYWORD
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silica mineral, purification, ultrasonic leaching
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