The effect of diluting groundwater on chemical sedimentation in alkaline in-situ leaching of a uranium deposit of Xinjiang

Based on the results computed by a geochemistry model,the unsuccessful reasons in acid and alkaline in-situ leaching of a uranium deposit of Xinjiang are analyzed.The necessity of diluting groundwater during leaching is pointed out.The results of laboratory and field tests indicate that the precipitation of CaSO4 and CaCO3 can be avoided by diluting groundwater.The dilution can be weakened by the mixing process of different liquids and dissolving process of mineral substances,but the effect can be neglected.Consequently,it is feasible to avoid chemical sedimentation during in-situ leaching by diluting groundwater.