中文摘要：

选用富含铁的火山岩型铀矿石,对其进行微波预处理,然后,在常温常压下进行搅拌浸出.考察微波预处理浸出铀的效果,并比较微波预处理前后矿物粒度、硫酸浓度、液固比、搅拌时间对浸出率的影响.结果表明：微波预处理后,硫酸的消耗量未增加,浸出所需时间缩短,矿物粒度较大时仍能获得相对较好的浸出率;与对照组相比,铀浸出率有所提高,微波预处理该铀矿石可行.微波预处理后,该铀矿石最佳的浸出工艺条件为矿物粒度-150μm、硫酸浓度20 g/L、液固比3L/kg、搅拌时间9 h.

英文摘要：

An iron-rich volcanic uranium ore which was prepared for agitation leaching at ambient temperature and pressure was pretreated by microwave heating.The effect of microwave extraction from uranium ore was investigated,and after microwave pretreatment,the influence factors including mineral particle size,sulfuric acid concentration,liquid-solid ratio,leaching time were compared with untreated.The results showed that the sulfuric acid consumption didn＇t increase but the needed leaching time did shorten after microwave pretreatment,as the mineral particle size which could gain relatively superior leaching rate although it was large;Compared with control group,the leaching rate of uraniumincreased,therefore,it was feasible to use microwave pre-treat this uranium ore.The optimalleaching process parameters were 150 μm particle size,20 g / L acid concentration,3 L / kg liquid-solid ratio,and 9 hour agitation time.