低品位铀矿石微生物柱浸试验  

Column Bioleaching of Low-grade Uranium Ore

作　　者：李江[1] 刘亚洁[1] 周谷春[1] 车江华[1] 

机构地区：[1]东华理工大学,江西抚州344000

出　　处：《有色金属（冶炼部分）》2012年第6期36-39,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(50974043);江西省教育厅产学研合作基金资助项目(GJJ09008)

摘　　要：对某低品位铀矿石进行了不同喷淋条件的微生物柱浸试验。结果表明,试验用混合菌群对目标铀矿石具有较强适应性,浸出周期172d,菌浸期间5%和10%喷淋量条件下渣计平均浸出率分别为87.70%和88.53%,耗酸率分别为5.36%和5.37%。菌浸阶段采用较大喷淋量可提高浸出率,但液固比会显著增加,综合成本相应提高。因此,喷淋量的选择应综合考虑铀资源回收率与浸出成本。Column bioleaching of a low-grade uranium ore with a variety of spraying methods was carried out. The results show that the mixed culture of acidophilic microorganisms in use have a high adaptation to the uranium minerals, and the average uranium leaching rates are 87.70% and 88.53%, the acid consump- tion is 5.36% and 5.37% within 172 days, at 5% and 10% spraying condition, respectively. A bigger spray liquid quantity could increase uranium leaching rate at the bioleaching stage, however, the ratio of liquid to solid rises greatly as well, which resulted in a rise of cost for uranium recovery. Therefore, the optimum spray liquid quantity should be confirmed with a consideration of both uranium recovery and leac- hing cost.

关 键 词：低品位铀矿石 微生物柱浸 喷淋量 浸出率 耗酸率 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]