An attempt has been made in this paper to recover pure monazite, a source for thorium, from the red sediments badlands topography of Kalipalli village of Ganjam district of Odisha, India by developing an industrially viable process flow sheet from a feed sample containing monazite mineral 0.63 % by weight. Results have indicated that monazite purity of 98 % could be achieved with a recovery of 63 % by weight. Recovery of monazite can be enhanced if the spiral concentrate is further scrubbed in alkaline media prior to subjecting to mineral separation studies. In the present investigation an attempt is also made to compare the monazite occurring from red sediment sample with naturally occurring monazite from beach sands. It is found that in spite, their morphological and topographical characteristics are markedly different the monazite occurring from both sources, have chemical elemental similarity. It is also seen that the chemical states of rare earth (RE) elements in monazite of both sources are matching. Further, due to natural occurrence of finer particle size of monazite (< 150 micron) in red sediments sample, the material is found to be suitable for chemical treatment to recover easily the valuable rare earths from it. Hence, it is recommended for mining of red sediments for recovery of monazite from red sediments of badlands topography as an additional resource for beach sand monazite.

中文翻译：

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印度东南沿海荒地地形红色沉积物中独居石的回收及其工业应用表征

本文尝试通过从含独居石矿物0.63的进料样品中开发出一种工业上可行的工艺流程图，从印度奥里萨邦Ganjam区Kalipalli村的红色沉积物荒地地形中回收纯的独居石（th源）。重量百分比。结果表明，独居石的纯度可以达到98％，回收率为63％（重量）。如果在进行矿物分离研究之前，在碱性介质中进一步洗涤螺旋浓缩物，可以提高独居石的回收率。在本研究中，还尝试将红色沉积物样品中的独居石与沙滩上的天然独居石进行比较。发现尽管如此，它们的形态和形貌特征明显不同，两种来源都存在独居石，具有化学元素相似性。还可以看出，两种来源独居石中稀土元素的化学状态都匹配。此外，由于在红色沉积物样品中自然存在的独居石的粒径较小（<150微米），因此该材料适用于化学处理，可轻松地从中回收有价值的稀土。因此，建议开采红色沉积物以从荒地地形的红色沉积物中回收独居石，作为海滩砂独居石的额外资源。由于天然存在的红色沉积物样品中独居石的粒径较小（<150微米），因此该材料适用于化学处理，可轻松从中回收有价值的稀土。因此，建议开采红色沉积物以从荒地地形的红色沉积物中回收独居石，作为海滩砂独居石的额外资源。由于天然存在的红色沉积物样品中独居石的粒径较小（<150微米），因此该材料适用于化学处理，可轻松从中回收有价值的稀土。因此，建议开采红色沉积物以从荒地地形的红色沉积物中回收独居石，作为海滩砂独居石的额外资源。