Abstract
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In order to establish the optimized recovery process for ilmenite and zircon from beach sand of Dunjang area, Chonnam Province, the physical beneficiation and subsequent mineralogical characterization of the separated minerals were conducted. There was a clear relationship between particle size and heavy mineral content that the heavy minerals were mostly concentrated in the particles sized below 150μm. Gravity separation using spiral separator and shaking table separator made it possible to pre-concentrate the heavy minerals by rejecting light and coarse particles consist mainly of quartz. High-intensity magnetic separator and induced magnetic separator were used to separate the magnetic particles from non-magnetic particles of gravity concentrate and subsequently to fractionate the magnetic particles into three fractions, high susceptible, less susceptible and magnetic-others according to their magnetic susceptibility. Most of ilmenite and ilmenite-rich particles was finally concentrated in the high susceptible magnetic fraction and the content of TiO2 was 43.9wt.%. On the other hand, zircon and zircon-rich particles were concentrated in the non-magnetic fraction and magnetic-others showing ZrO2 contents of 6.8wt.% and 3.1wt.%, respectively. The zircon and zircon-rich particles were further beneficiated by screening that most of them could be recovered.
전라남도 둔장지역의 해안사로부터 일메나이트 및 저어콘의 회수를 위한 최적공정의 확립을 위해 물리적 선별 및 분리된 산물의 광물학적 평가를 수행하였다. 시료의 입자크기와 중광물의 함량과는 밀접한 관련이 있었으며 중광물은 대부분 150㎛ 이하의 입자에 분포하고 있음을 알 수 있었다. 중광물의 농축을 위해 스파이럴 및 요동테이블을 이용한 비중선별을 행하였으며 주로 석영으로 이루어진 경광물 및 조립광물을 제거함으로써 중광물이 농축된 정광을 얻을 수 있었다. 이 비중정광으로부터 자성입자를 분리하기 위해 고밀도 자력선별기를 사용하였으며 분리된 자성입자는 유도자력선별기를 이용하여 자성입자들이 가지는 자력감응도에 따라 고감응, 저감응 및 미감응 자성입자를 각각 분리하였다. 그 결과 일메나이트 및 함 일메나이트 광물은 대부분 고감응 자성입자로 농축되었으며 이때 산물의 TiO2 함량은 43.9wt.%로 나타났다. 반면 저어콘 및 함 저어콘 광물은 비자성 입자 및 미감응 입자로 분리되었으며 ZrO2 함량은 각각 6.8wt.% 및 3.1wt.%로 나타났으며 대부분 체질을 통해 회수할 수 있었다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society for Geosystem Engineering
- Journal Title(Ko) :한국지구시스템공학회지
- Volume : 43
- No :6
- Pages :543-550
Journal of the Korean Society of Mineral and Energy Resources Engineers
