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本文用电子探针分析、X射线衍射、红外光谱及穆斯堡尔谱研究了其稀土矿床中部分变生的褐帘石,褐帘石的穆斯堡尔谱表明Fe~(2+)/Fe~(3+)>1;Fe~(2+)和Fe~(3+)在M(1)和M(3)位置中的无序度分别为0.49和0.61,大于未变生的褐帘石;说明该褐帘石在温度较高,较还原的条件下形成。褐帘石晶格中的U,Th等放射性元素使其部分变生。用浮选剂C_(16-18)硫化羧酸不能有效地浮选部分变生的褐帘石,但其中Th,U的放射性衰变与氧化作用使稀土元素从晶格中释放出来,形成风化壳型的离子吸附稀土矿床,用盐水等电解质溶液即可提取80％以上的稀土元素。
In this paper, the electron-probe analysis, X-ray diffraction, infrared spectroscopy and Mossbauer spectroscopy of rare earth deposits in its partial transformation of the brown curtain, brown curtain stone Mossbauer spectrum shows Fe 2 / Fe ~ (3 +)> 1, Fe ~ (2+) and Fe ~ (3+) at the M (1) and M (3) sites were 0.49 and 0.61, respectively, Curtain stone; Description of the brown curtain stone in the higher temperature, the reduction of the formation of the conditions. Brown curtain stone lattice U, Th and other radioactive elements make it partially transformed. The use of flotation reagent C_ (16-18) sulfide carboxylic acid can not effectively flotation of some of the metamorphic brown curtain, but the Th and U radioactive decay and oxidation of rare earth elements released from the lattice, the formation of weathering shell Type ion adsorption rare earth deposits, brine and other electrolyte solution can be extracted more than 80% of rare earth elements.