一、前言当前我国南方各稀土冶炼厂,以独居石为原料生产的氯化稀土产品,其“比放”均在n×10~(-6)居里/公斤,超过国家规定的允许标准(1×10~(-7)居里/公斤),妨碍了稀土产品的销售和应用。解决这一重大课题,将为我国南方各省大力开发独居石矿物,发展稀土工业,打开新的局面。氯化稀土产品中的放射问题,国外早已引起重视,据报导法国罗纳·普朗克公司生产 I. Introduction At present, all rare earth smelters in southern China produce monochloride rare earth products with monazite as their raw materials, with “specific release” of more than n × 10-6 (Curie / kg) exceeding the permissible standards 1 × 10 ~ (-7) Curie / kg), which hinders the sales and application of rare earth products. To solve this major issue, we will vigorously develop monazite minerals for the provinces in southern China, develop the rare earth industry and open up a new situation. Radiation problems in rare earth chloride products have long drawn great attention from foreign countries. According to reports, France’s Ronald Planck Company