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首页> 外文会议>Journal of Rare Earths >Rare Earth Elements in Zhijin Phosphorite and Distribution in Two-Stage Flotation Process
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Rare Earth Elements in Zhijin Phosphorite and Distribution in Two-Stage Flotation Process

机译：治金磷矿中的稀土元素及其在两阶段浮选过程中的分布

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摘要

Zhijin phosphorite is one of super large-scale medium-low grade and REE-bearing phosphorite deposit in Southwest of China. Previous investigations had revealed that this deposit contained appreciable amounts of rare earth elements (REE) reaching up to 1300μg·g<,-1>. In this paper, REE contents and existing state in single collophanite and dolomite mineral were further analyzed by ICP-MS and EPMA-1600 Electric Probe methods. The results indicated that REE content of collophanite was far more than that of dolomite, and increased with an increase of phosphor. There existed independent minerals of REE in single collophanite mineral, such as cerianite and monazite, but the amount of them was extremely little. No independent mineral of yttrium was found in this investigation. Presumedly, REE and yttrium were present in the form of ions in the lattices of collophanite. Based on above investigation, the two-stage reverse flotation technology was carried out to see the distribution of REE in flotation process. It was found that REE was mainly enriched in phosphate concentrate and recovered in the rough stage flotation. REE recovery of concentrate increased with an increase of P<,2>O<,5> content and P<,2>O<,5> recovery of concentrate. Under the optimum flotation condition, REE recovery was 79.25% in the rough stage flotation and 9.94% in scavenging flotation.
机译：致金磷矿是中国西南地区超大型中低品位稀土矿床之一。先前的研究表明，该矿床中包含的稀土元素（REE）含量高达1300μg·g，-1。本文通过ICP-MS和EPMA-1600电探针法进一步分析了单个白云石和白云石矿物中的稀土元素含量和存在状态。结果表明，白云石的稀土元素含量远高于白云石，并且随着磷的增加而增加。单一的白云石矿物中存在着独立的稀土元素矿物，例如铈陶石和独居石，但数量极少。在这项调查中未发现钇的独立矿物。据推测，稀土元素和钇以离子的形式存在于白云石的晶格中。在以上研究的基础上，进行了两阶段反浮选技术，以考察稀土在浮选过程中的分布情况。发现稀土元素主要富含磷酸盐精矿，并在粗浮选中回收。浓缩物的REE回收率随P，2，O，5含量和P，2，O，5,5浓缩物回收率的增加而增加。在最佳浮选条件下，粗浮选矿的REE回收率为79.25％，扫气浮选的REE回收率为9.94％。

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