Acid Column Leaching Test of Manglai Uranium Ore in Inner Mongolia
In order to explore the feasibility of acid leaching of ore from Manglai uranium deposit in Inner Mongo-lia,and obtain the characteristics and test parameters of uranium leaching under different sulfuric acid mass con-centrations(5,10,15 and 20 g/L),indoor column leaching tests of uranium were carried out.The test results show that the mass concentration of uranium and the leaching rate of uranium in leaching solution increase with the increase of sulfuric acid concentration,and the leaching period is shortened.The decrease of leaching fluid flow at the late stage of the experiment was related to clayification alteration of feldspar minerals.For the ore with an av-erage uranium grade of 8.8 × 10-5,the uranium leaching rate is 49.80％～54.35％.It is considered that the mass concentration leaching solution of 10 g/L H2SO4 is suitable for the uranium acid leaching mining from the as-pects of leaching rate,blockage prevention and uranium leaching cost.
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