【摘要】 采用浓硫酸低温焙烧的方法分解包头稀土精矿,考察了矿酸比、焙烧温度、焙烧时间等几个因素对矿分解率及对钍分布的影响。结果水浸渣的放射性总比放符合国家低放渣排放标准,稀土和钍的浸出率均达到95%以上。更多还原

【Abstract】 Decomposition of Baotou rare earth corcentrate was carried out by using contentrated sulfuric acid at low temperatureThe effects of ratio of ore to sulfuric acid,roasting temperature and time on the decomposition were studied. The results show that the leaching rate of both REO and ThO2 is up to 95% and the dregs is in accord with radioactivity standard of China.更多还原