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某铀矿石属铀-磷灰石-绿泥石类型,除沥青铀矿外,氟磷灰石和绿泥石为主要含铀矿物,铀与氟磷灰石关系密切。与氟磷灰石密切相关的铀在现有加压碱浸条件下难以浸出。试验所用原矿样直接酸浸,酸用量高达25％。原矿样直接加压碱浸,铀的浸出率只有75.2％。采用选冶联合流程提取铀,即通过浮选将原矿样分成磷酸盐精矿和尾矿两组含铀产品。磷酸盐精矿用酸法浸出,尾矿用加压碱法浸出,浸出时总的铀浸出率为90.5％,且试剂消耗也大幅度降低,效果较好。浮选时以碳酸钠为调整剂,水玻璃和栲胶为脉石抑制剂,环烷酸皂为磷矿物的捕收剂。文中叙述了矿石性质,原矿浸出,浮选分组和浮选产品浸出等数据。
A uranium ore is of uranium-apatite-chlorite type. Apart from pitch uranium, fluorapatite and chlorite are the main uranium-bearing minerals, and uranium is closely related to fluorapatite. Uranium closely related to fluorapatite is difficult to leach under the existing pressurized alkaline leaching conditions. Raw ore samples used in the test directly acid leaching, the amount of acid up to 25%. Ore samples directly pressurized alkali leaching, uranium leaching rate of only 75.2%. Uranium is extracted by the combined process of dressing and smelting, that is, the raw ore is divided into two groups of uranium-containing products, namely phosphate concentrate and tailings, by flotation. Phosphate concentrate leaching with acid, tailings leaching with pressurized alkali, the total leaching uranium leaching rate was 90.5%, and the reagent consumption is also significantly reduced, the effect is better. When flotation sodium carbonate as a regulator, sodium silicate and guar gum gangue inhibitors, naphthenic acid soap phosphate minerals collector. The article describes the nature of the ore, ore leaching, flotation grouping and flotation product leaching and other data.