【摘要】 对某高酸耗砂岩铀矿石进行了低酸度、高压氧气条件下的室内浸出试验研究,结果表明:当浸出剂pH为2.00～2.20、以氧气作氧化剂时,在氧压1.5 MPa的搅拌浸出条件下,铀的浸出率可达到89%以上;在氧压为1.0 MPa的柱浸条件下,铀浸出率为80%～85%。试验条件下,低酸氧浸的浸出率均高于以H₂O₂作氧化剂条件下的浸出率,浸出过程的酸耗为17.2～37.6 t/t矿石,浸出液中Fe²⁺、Al³⁺质量浓度分别为400 mg/L和90 mg/L,生产成本和沉淀风险均大幅度降低。更多还原

【Abstract】 The leaching experiment on high acid-consuming sandstone uranium is conducted,the result indicated that the recovery rate of uranium achieves 89% under rarefactive acid and oxygen as oxidant in the pressurized batch leaching,and that is 80%～85% for the pressurized column leaching,both of which recovery rate exceed the leaching by H₂O₂ as oxidant.The acid-consuming of leaching ore is 17.2～37.6 t/t ore,and the concentration of Fe²⁺、Al³⁺ in the leach liquor reduce to 400 mg/L and90 mg/L.The cost of production and risk of ionic compound subsiding are dropped sharply.更多还原