Study on precipitation and plugging mechanism in CO2 + O2 in-situ leaching of uranium in Nalinggou uranium deposit
摘要
In this paper, PHREEQC software was used to calculate the saturation index of insoluble minerals, the pH boundary values of precipitated CaCO3, and the boundary values of Ca2+ and HCO3− concentrations in relation to the uranium extraction process and the chemical composition of leaching in the Nalinggou uranium deposit. Based on the comparative analysis results of the mineral composition and chemical composition of the primary rock and the blockage, the formation of the blockage containing the mineral layer is mainly related to the pH-value and the corresponding ion concentration of the leaching solution, the sediment can be effectively avoided in the boundary value range.