期刊论文

Experimental Studies on Acid and Bacterial Leaching of Uraninite Ores

中文

昆明理工大学学报(自然科学版)

1007-855X

2011

36

3

9-14

10.3969/j.issn.1007-855X.2011.03.003

收稿日期：.基金项目：国家自然科学基金资助项目（项目编号：10975071）.

本校为第一机构

以某铀矿山的沥青铀矿石作为研究对象,开展了溶浸液pH=2.0的稀硫酸浸出,酸化后,溶浸液分别为改良9 K培养基中Fe^2＋完全被细菌氧化后的含菌溶液,以及按10%接种量接种细菌后的改良9 K培养基溶液的酸法-细菌分段浸出试验,三种条件下铀的浸出率分别为73.72%、78.97%和75.79%.试验结果表明,酸法-细菌分段浸出的浸出率比酸法浸出的浸出率提高了2.07%～5.25%;铀矿石的酸法-细菌分段浸出过程由化学反应控制和扩散控制两个阶段组成,两阶段的过渡期是加入细菌的最佳时期;细菌浸出时,高浓度细菌会产生群体效应,加速对铀矿物的氧化溶解.

In this paper, uraninite ores are taken as experimental objects. Three kinds of leaching experiments are conducted, including the acid solution with pH value 2.0, bacterial solutions with ferrous ions oxidized completely in improved 9k medium and improved 9k medium with 10% inoculation after acid leaching. The leaching rates for three uraninite ores leaching systems reach 73.72%, 78.97% and 75.79% respectively. The results indicate that the leaching rate of acid and bacterial leaching in sections increases by 2.07% - 5.25%. The process of uraninite ores acid and bacterial leaching is composed ...