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.
出处
《有色金属(冶炼部分)》
CAS
北大核心
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)
关键词
低品位铀矿石
微生物柱浸
喷淋量
浸出率
耗酸率
low-grade uranium ore
column bioleaching
spray liquid quantity
leaching rate
acid con- sumption rate