哈萨克斯坦某铀矿床地浸采铀现场试验研究

Field test research on in-situ leaching of uranium from a uranium deposit in Kazakhstan

为工业开发哈萨克斯坦扎尔巴克砂岩型铀矿床,本文收集了详细的地质资料,得到主要开采参数,开展低酸浸出现场试验。浸出试验的结果是获得浸出周期及酸耗等影响成本的关键参数。现场试验采用行列式井型、采用膨润土止水的祼孔施工工艺、超前酸化模式、氟化氢铵洗孔等近几年地浸矿山新工艺,在矿体平均厚度、品位均不占优势的情况下,试验得到了如下结果:该矿床适宜于采用酸法地浸采铀工艺,浸出液集合样平均铀浓度为87.7 mg/L,峰值铀浓度可达150.0 mg/L,平均单孔抽液量为3.5 m^(3)/h,平均单孔注液量为1.3 m^(3)/h。本次试验取得了良好的浸出效果和经济效益,为矿床后续的工业开发提供可靠依据。

In order to develop Kazakhstan Zarbak sandstone type uranium deposit industrially, this paper collects detailed geological data, obtains main mining parameters, and carries out field tests of low acid leaching.According to the results of leaching test, the key parameters affecting the cost such as leaching cycle and acid consumption are obtained.The new in-situ leaching mine processes in recent years, such as the determinant well type, the open hole construction process using bentonite water stop, the advanced acidification mode, and the ammonium hydrogen fluoride hole washing are used in the field test.Under the condition that the average thickness and grade of the ore body are not dominant, the following results are obtained: the deposit is suitable for the acid in-situ leaching uranium mining process.The average uranium concentration of the leaching solution collection sample is 87.7 mg/L,and the peak uranium concentration can reach 150.0 mg/L,The average single hole liquid extraction volume is 3.5 m^(3)/h, and the average single hole liquid injection volume is 1.3 m^(3)/h.This test has achieved good leaching effect and economic benefits, which provides a reliable basis for the subsequent industrial development of the deposit.