Abstract:The column leaching test is an important step in selecting and determining the leaching process for new ore deposits. The acid and alkali column leaching tests were carried out in laboratory with the ore from an unmined sandstone uranium deposit, as well as, the oxidation leaching comparison was also carried out. The acid leaching agent is 6 g/L sulfuric acid solution, the alkali leaching agent is 3 g/L ammonium bicarbonate solution, and the oxidant is 300 mg/L hydrogen peroxide solution. The results show that acid leaching is better than alkali leaching, and oxidation leaching is better than non-oxidation leaching. The leaching result with acidity 6 g/L+300 mg/L hydrogen peroxide is the best, which leaching rate is upto 87.42% after 54 days. When the leaching rate reaches 75%, the ratio of liquid to solid is 2.29, and the acid consumption is 9.0 kg/t. Combined with the characteristics of low carbonate content of ore, it is suggested to use the acid process with 6 g/L acidity to carry out the field leaching condition test, and consider adding an appropriate amount of oxidant.