冶炼废渣综合回收铀、铌、钽和锡

根据某冶炼尾渣的成分和矿物特性，研究了铀、铌、钽和锡的回收工艺。开发出酸浸提铀-重选抛尾-弱磁选回收铌、钽一强磁选除铁回收锡的联合工艺流程。铀浸出率大于80％；铌、钽品位大于31％，回收率大于80％；锡精矿品位大于62％，回收率大于65％，锡精矿经放射性去污后，其放射性水平基本符合有色冶金行业标准。

Comprehensive recovery of uranium, niobium, tantalum and tin from smelter tailings

By study of the composition and minerals properties of smelter tailings, comprehensive experiments are carried out to recover uranium, niobium, tantalum and tin from the smelter tailings. A combined technique process is developed to leach out U with acid, separate tailing with gravity and recover Nb, Ta with low intensity magnet and separate Sn from iron using strong magnetic field. The U recovery rate is over 80%. Ta-Nb is over 80% while the grade is over 31%, Sn over 65% while the grade is over 62%. The radiation dose of Sn concentrate meets the demand of nonferrous industry standards by removing nuclide.