从上面统计数据可知,1999年日本分离稀土产品及富集物的进口状况为: 1.1999年稀土分离化合物及富集物的进口量合计为9070吨,比1998年增加了18％。其中的分离产品为7300吨,比1998年(5830吨)增加了23％,中间原料为1770吨,比1998年(1830吨)减少了3％。 2.在稀土分离化合物中,除用于磁材料的钐、镝、镨增加外,镧、铈等轻稀土也增加 As can be seen from the above statistical data, the import status of Japan’s isolated rare earth products and enrichments in 1999 was: 1. In 1999, the total imports of rare earth compounds and enrichments totaled 9,070 tons, an increase of 18% over 1998. Of these products, 7300 tonnes were separated, an increase of 23% over 1998 (5830 tonnes) and 1770 tonnes of intermediate feedstock, a 3% reduction from 1998 (1830 tonnes). In the rare earth separation compounds, in addition to the samarium, dysprosium and praseodymium used in magnetic materials, the light rare earths such as lanthanum and cerium also increase