西藏尼玛盆地油页岩的发现及其地质意义
Discovery of oil shale in the Nima basin, Tibet, China and its significance
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摘要: 介绍了密度差值很小的单矿物的分离技术方法，并利用重液折光率千分位和万分位的细微区别分离单矿物石英和绢云母。该方法由石英与长英质混合物的分离技术，推广到绢云母与绢云母长英质混合物的分离技术，改进后的重液分离技术具有快速、高效、经济的特点。当重液的折光率为1.577~1.580时，石英的分离纯度能达到95﹪~99﹪;当重液的折光率为1.5895~1.5840时，绢云母的分离纯度能达到90﹪~99﹪。Abstract: This paper describes the separation methods of single mineral with small density difference. Using extremely subtle differences of heavy liquid refractive index in thousandth and ten-thousandth could separate single mineral quartz and sericite. Quartz from felsic mixture separation technology can be used to separate sericite from sericite felsic mixture . Improved heavy liquid separation technology is characterized of fast, efficient and economic. When the heavy liquid of refractive index is 1.577-1.580, the separation purity of quartz can reach 95-99%. When the heavy liquid of refractive index is 1.5895-1.5840, the separation purity of sericite can reach 90-99%.
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