微波浸出在火山岩型铀多金属矿中的应用

Application of Microwave Leaching in Volcanic Type Uranium Polymetallic Ore

考察了氧化剂种类及用量、酸用量、浸出时间、浸出温度对火山岩型铀矿铀浸出的影响,最终确定了最优的浸出条件:粒度为-160目的原矿+占矿重16.56%的浓硫酸+2%NaClO_3+400 mL水,在温度为90℃的条件下,搅拌5 h。同时做了微波加热与常规加热的对比试验,结果表明:微波加热浸出对该铀矿铀的浸出效率明显优于常规浸出,常规常压浸出铀的浸出率为82.12%;而微波浸出铀的浸出率可达85.53%,且浸出时间大幅度缩短。

The influences of kind and amount of oxidant,acid dosage,leaching time and leaching temperature on the volcanic rock type uranium deposit of in-situ leaching of uranium were examined. The optimal leaching conditions were ultimately determined： granularity for-160 ore,16. 56% of the mine heavy concentrated sulfuric acid,2% NaClO_3 and 400 mL water,under the condition of temperature 90 ℃,mixing for 5 h. At the same time,the contrast test of microwave heating and conventional heating was made. The results showed that the microwave heating to the uranium leaching uranium was better than the conventional leaching,and the leaching efficiency of normal atmospheric pressure leaching of uranium leaching rate was 82. 12%. The leaching rate of the microwave leaching uranium was 85. 53%,and the leaching time was greatly shortened.