我国稀土资源居世界首位,稀土工业亦在日益发展,接触和使用稀土的人员越来越多。目前,国内外对稀土的毒性方面研究较多,但就稀土对肺脏致纤维化作用的报道尚少见。为此,我们就包钢生产的高品位稀土精矿致肺脏纤维化作用问题,通过动物实验进行了研究。现将实验结果报告如下。 材料、方法和分组 稀土精矿取自包钢选矿厂稀选车间。主要成分有:稀土氧化物总含量60％(其中铈占50％,镧占23％),二氧化硅0.7％,磷2.2％,氟8.3％,二氧化锰0.14％,钍 China’s rare earth resources ranks first in the world, rare earth industry is also growing, more and more access to and use of rare earth. At present, there are many studies on the toxicity of rare earth both at home and abroad, but reports on the fibrogenic effect of rare earth on the lung are still rare. For this reason, we made a study on the role of lung fibrosis caused by the high-grade rare earth concentrate produced by Baotou Steel, through animal experiments. The experimental results are reported below. Materials, methods and grouping Rare earth concentrates were taken from the dilute-dressing plant at Baotou Steel Concentrator. The main components are: the total content of rare earth oxides 60% (of which 50% cerium, lanthanum 23%), 0.7% silica, phosphorus 2.2%, fluorine 8.3% manganese dioxide 0.14% thorium