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首页> 外文会议>Beneficiation of phosphates VIII >THE RECOVERY OF RARE EARTH ELEMENTS FROM PHOSPHATE ROCK AND PHOSPHATE MINING WASTE PRODUCTS USING A NOVEL WATER-INSOLUBLE ADSORPTION POLYMER
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THE RECOVERY OF RARE EARTH ELEMENTS FROM PHOSPHATE ROCK AND PHOSPHATE MINING WASTE PRODUCTS USING A NOVEL WATER-INSOLUBLE ADSORPTION POLYMER

机译：新型非水溶性吸附聚合物对磷矿石和磷矿废料中稀土元素的回收

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The rare earth elements (REE) or rare earth metals are vital components in many modern electronics and are critical to the advances in several high technology fields, including green energy. While numerous procedures to extract and recover rare earth elements from phosphate waste products have been reported, none have seen widespread commercial acceptance due to various limitations, such as high cost and low efficiency, and the inability to economically extend the technology to large-scale operations. One way to achieve a commercially viable separation scheme is to employ a material that will economically and selectively bind various REEs in the presence of potential interfering ions, such as sodium, calcium, and silicon. In this study, the extraction and recovery of rare earth elements and phosphorus from phosphate rock and three phosphate fertilizer waste byproducts, phosphogypsum, amine tailings, and waste clay, using 2.5% nitric acid and a novel water-insoluble adsorption polymer, poly (maleic anhydride-alt-1-octadecene) sodium salt, are examined. Overall extraction and recovery yields were between 80% for gadolinium and 8% for praseodymium from amine tailings, between 70% for terbium and 7% for praseodymium from phosphogypsum, between 56% for scandium and 15% for praseodymium from phosphate rock, and between 77% for samarium and 31% for praseodymium from waste clay. Average REE extraction and recovery yields were 50% to 60%. Poly (maleic anhydride-alt-1-octadecene) sodium salt effectively bound 100% of the rare earth elements extracted from the solids. Phosphorus was not chelated by the polymer and was isolated from the extract solution in yields of 16% to 34%. These results suggest that this process may be an efficient means of recovering rare earth elements and phosphorus from phosphate mining waste products.
机译：稀土元素（REE）或稀土金属是许多现代电子产品中至关重要的组成部分，对于包括绿色能源在内的多个高科技领域的发展至关重要。尽管已经报道了许多从磷酸盐废料中提取和回收稀土元素的方法，但是由于各种限制（例如高成本和低效率）以及无法经济地将该技术扩展到大规模生产，没有一个方法被广泛的商业接受。 。实现商业上可行的分离方案的一种方法是采用一种材料，该材料在存在潜在的干扰离子（例如钠，钙和硅）的情况下，经济而有选择地结合各种REE。在这项研究中，使用2.5％的硝酸和一种新型的水不溶性吸附聚合物聚（马来酸）从磷矿石和三种磷肥废副产品，磷石膏，胺尾矿和废粘土中提取和回收稀土元素和磷。检查了酸酐-alt-1-十八碳烯的钠盐。尾矿中的总提取和回收率在80％至and的8％之间，ter的70％至磷石膏的的7％之间，scan的56％至磷矿石的15的15％的总产率和77之间废粘土中的含量为％，and为31％。 REE的平均提取和回收率为50％至60％。聚（马来酸酐-alt-1-十八碳烯）钠盐有效地结合了从固体中提取的100％稀土元素。磷不会被聚合物螯合，而是从提取液中分离出来，产率为16％至34％。这些结果表明，该过程可能是从磷酸盐开采废品中回收稀土元素和磷的有效方法。

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