文档介绍：doi:.1007-
低品位铀矿石微生物柱浸试验
李江,刘亚洁,周谷春,车江华
(东华理工大学,江西抚州 344000)
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172 d,菌浸期间5%和10%%%,%%。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。
关键词:低品位铀矿石;微生物柱浸;喷淋量;浸出率;耗酸率
中图分类号:+2 文献标识码:A 文章编号:1007-7545(2012)06-0000-00
Column Bioleaching of Low-grade Uranium Ore
LI Jiang, LIU Ya-jie, ZHOU Gu-chun, CHE Jiang-hua
(East China Institute of Technology, Fuzhou 344000, Jiangxi, China)
Abstract: 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 anisms in use have a high adaptation to the uranium minerals, and the average uranium leaching rates are % and %, the acid consumption is % and % 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 leaching cost.
Key words: low-grade uranium ore; column bioleaching; spray liquid quantity; leaching rate; acid consumption rate
我国铀矿资源相对贫乏,而且铀矿石品位