Heap and bacterial leaching tests on sample of low grade Uranium ore from Keruadungri, Singhbhum District, Bihar

Sample of low grade uraniferous quartz-chlorite schist analysing 0.043% U3O8, 13.0% Fe and 0.03% S and containing indigenous ferrobacillus group of bacteria were tested for amenability to heap and bacterial leaching. A leachability of 92.8% of the contained uranium was obtained in 10 weeks time using 9K nutrients for the growth of indigenous bacteria against 62.5% obtained in the same time without the use of bacteria by heap leaching method. (K.K. Dwivedy, M.C. Bhurat and K.M.V. Jayaram, Atomic Minerals Division, Department of Atomic Energy, M.T. Lab, New Delhi)