摘要
根据内蒙古某砂岩型铀矿床水文地质条件和总抽液量、溶浸条件等工艺因素,进行CO_2+O_2中性浸出地浸试验研究。试验结果表明:增大钻孔总抽液量对浸出液中铀质量浓度几乎没有影响;将溶浸剂pH控制在6.3~6.5范围内,可以有效防止矿层化学堵塞;增大氧气浓度有利于提高浸出液中铀质量浓度;微酸洗孔可以显著改善弱渗透性地浸钻孔的渗透性。
According to the hydrogeology conditions,the total pumped lixivium and leaching conditions of a uranium deposit in Inner Mongolia,the experiment of in-situ leaching of uranium with CO_2 and O_2 was carried out.The results indicate that the total pumped lixivium had no effect on uranium concentration in lixivium.To avoid the chemical jamming,pH value in lixiviant must be controlled at 6.3 — 6.5.The increase of oxygen concentration can improve uranium concentration in lixivium.Low-Permeable borehole for in-situ leaching should be washed with acid solution.
引文
[1]张建国,王海峰,姜岩,等.美国碱法地浸采铀工艺技术概况[J].铀矿冶,2005,24(1):6-13.
[2]田新军,沈红伟,陈雪莲,等.用二氧化碳减缓碱法地浸采铀中的化学沉淀堵塞[J].铀矿冶,2006,25(1):15-20.