Study on Uranium Recovery from Uranium-Containing Waste Dump Using Heap-Bioleaching

The feasibility of uranium-containing waste dump-bioleaching using 05B mixed strains was studied,and the technological process and technical parameters were determined.The results indicated that 05B mixed strains was of fine adaptability,activity and high tolerance of fluorine and suitable for uranium-containing waste dump-bioleaching.The leaching rate value of 50.0% was achieved,and the uranium content in the heap leaching residue met the environmental requirement(0.01%).The experiment was completed in 146 days,the FeSO4·7H2O consumption was 12 kg per ton of uranium-containing waste dump,and sulfuric acid consumption rate was 2.6%.