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http://dx.doi.org/10.9727/jmsk.2017.30.4.137

Beneficiation of Low Grade Sericite Using Attrition Scrubbing and Sedimentation  

Chae, Sungki (Korea Institute of Geoscience and Mineral Resources)
Kim, Hyunsoo (Korea Institute of Geoscience and Mineral Resources)
Kim, Sangbae (Korea Institute of Geoscience and Mineral Resources)
Kim, Wantae (Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Mineralogical Society of Korea / v.30, no.4, 2017 , pp. 137-147 More about this Journal
Abstract
Sericite is a clay mineral that has a wide applications in the industry, depending on its purity. To maintain sericite's purity as high as possible it is necessary to remove its gangue minerals or control their contents prior to use for high value-added products and applications. In this study, the wet beneficiation of sericite by applying selective grinding and sedimentation techniques, were investigated. The ore mineral was composed mainly of sericite, quartz and calcite. Analysis showed that the content of sericite increased along with the particle size decrease, but the contents of impurity minerals as quartz and calcite were tended to decrease relatively with particle size decrease. The results of liberation tests using an attrition scrubber showed that the increase in residence time and slurry density have increased the generation of fine particles in -325 mesh size range. It was observed, however, that the contents of impurities such as quartz and calcite in such fine particles also increased during prolonged scrubbing. In the dispersed form without breaking, the yield of the recovered concentrate was 15.4 wt% and the $K_2O$ content was 9.84 wt%, after the dispersed slurry was allowed to settle for 20 minutes. On the other hand, the concentrate yield was increased to 23.4 wt% after 10 minute attrition scrubbing and 40 minute sedimentation, while its $K_2O$ content was decreased to 9.71 wt%. Most of final products were observed as platelet-shaped particles containing Si, Al and K which are main component of sericite.
Keywords
Sericite; Beneficiation; Attrition scrubbing; Selective grinding; Sedimentation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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