Test on In-situ Leaching Mining of Some Sandstone Uranium Deposit in Xinjiang, China
The geological and hydrogeological conditions of some sandstone uranium deposit in Xinjiang are extremely complex, which exhibits especially in the high carbonate content of ore and the high salt concentration of groundwater. Two blocks in the deposit were selected for acidic in-situ leaching test and alkaline insitu leaching test differently. On acidic in-situ leaching test field, a group of leaching well was constructed as a triangle pattern (four-spot well), 5-33g/L H2SO4 and 5g/L H2O2 was selected as lixiviant. The test results show that the uranium concentration in pregnant solution is lower, and a serious chemical precipitation and blocking occur in the ore-bearing layer, which cause a significant decreasing of pumping and injection rate. On alkaline in-situ leaching test field, a group of leaching well with a square pattern(five-spot well) was constructed, 0.54g/L H2O2 solutions were injected at early stage and 550-600mg/L NH4HCO3 solutions were injected at last stage. The test results show the maximum of the uranium content in pregnant solution reach 53.7mg/L, and the pumping and injection rate do not decrease significantly. So the alkaline in-situ leaching mining can be adopted in this deposit.
LIU Jiang TAN Kai-xuan TANG Zhen-Ping QU Hui-qiong
School of Nuclear Resource and Nuclear Fuel Engineering, University of South china, Hengyang, Hunan, China
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
205-208
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）