前言我国稀土资源十分丰富,超过资本主义国家储量总和的数倍。建国以来,我国稀土工业坚持独立自主,自力更生的方针,从无到有从小到大,得到迅速的发展。尤其是文化大革命以来,在毛主席的革命线路指引下,我国稀土工业有了相当大的发展。目前全国十余家稀土湿法冶金工厂大多数采用萃取工艺分离、提纯稀土元素,产品 Preface China’s rare earth resources are very rich, more than several times the total capitalist state reserves. Since the founding of the PRC, rare earth industry in our country adhere to the principle of independence and self-reliance, from scratch to childhood, get rapid development. Especially since the Cultural Revolution, under the guidance of Chairman Mao’s revolutionary line, there has been considerable development of China’s rare earth industry. At present, more than ten rare earth hydrometallurgical plants nationwide adopt the extraction process to separate and purify the rare earth elements, the products