【摘要】 为了研究微生物浸铀工艺过程中的微生物行为特征和工艺参数对铀地浸效果的影响，建立了同时考虑微生物生长的储层变形、物质运移传递和化学反应的微生物浸铀耦合模型，以新疆伊犁盆地某砂岩型铀矿为工程背景，采用COMSOL Multiphysics有限元分析软件针对微生物浸铀过程进行了数值模拟。结果表明：微生物浸铀过程中浸出液铀浓度整体趋势为浸出开始后逐渐上升，400 d左右达到峰值，最后再缓慢下降；抽注单元尺度分析浸铀过程存在溶浸死角；抽注液流量越高，浸出液铀浓度所能达到的峰值也就越高；微生物数量与可逆解吸附速率和最大比生长速率呈正相关，与可逆吸附速率和比衰亡速率呈负相关；抽注液井附近由于流体压力的不同，渗透率的演化规律也不同。研究结果对于微生物浸铀工艺有一定的指导意义。更多还原

【Abstract】 To study the influence of microbial behavior characteristics and process parameters on the in-situ leaching of uranium in the process of microbial leaching of uranium, a microbial leaching uranium coupling model considering reservoir deformation, material migration and transfer, and chemical reaction of microbial growth was established. Based on the engineering background of a sandstone-type uranium mine in Ili Basin, Xinjiang, COMSOL Multiphysics finite element analysis software was used to simulate the process of microbial leaching of uranium. The results showed that, in the process of microbial leaching of uranium, the uranium concentration in the leaching solution gradually increased after the start of leaching, reached the peak value around 400 days, and finally decreased slowly. From the analysis of a five-point pumping well and injection well unit scale, a reaction dead angle in the process of in-situ leaching of uranium was found. The higher the flow rate of extraction and injection was, the higher the peak value of uranium concentration in the leaching solution could be reached. The number of microorganisms was positively correlated with the reversible desorption rate and the maximum specific growth rate, and negatively correlated with the reversible adsorption rate and the specific decay rate. The evolution law of permeability near the pumping well and the injection well was also different due to the different fluid pressures. The research results had a certain guiding significance for the microbial uranium leaching process.更多还原