When leaching regent NaHCO_3 concentration is 1 (g/L), average flow rate is 0.13 m/d, leaching 96 days with total liquid/solid ratio 9.42, uranium lea-ching rate is 76%.

• 溶浸剂中NaHCO3质量浓度1g/L,平均流速0 13m/d,浸出96d,总液固体积质量比达9 42L/kg,铀浸出率为76%25。