在扎鲁特旗大型超低品位钇族稀土矿床矿物学特性研究的基础上,以散射线本底标准法为理论依据,推导出了低品位钇族稀土矿X-荧光预选中矿石品位的最佳表征方式一“峰背比法”.研究表明,矿块的峰背比值与其中Y2O3的含量有良好的一元线性关系.在采用峰背比值作为矿块中稀土含量高低的表征方式的前提下,原矿经荧光预选后可获得Y2O3品位为1.52％,回收率为80.52％,Ce2O3品位为1.17％,回收率为82.23％的精矿,预选精矿中Y2O3含量完全达到原生稀土矿最低工业入选品位要求.
Qn the basis of the mineralogy characteristics of the family of yttrium rare earths in Jarud Banner,the "peak-back ratio" as the optimal grade representation way was deduced based on the method of scattering line background standards.The study indicated that the "peak-back ratio" has a good monadic linear correlation with the Y2O3 content of the ore.A concentrate with a Y2O3 grade of 1.52％,recovery of 80.52％,a Ce2 O3 grade of 1.17％,recovery of 82.23 ％ was obtained in the X-fluorescent pre-separation test by using the "peak-back ratio" as the grade representation way and the indexes of content can fully meet the requirements of the milling grade of rare earth ore.
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