Abstract:Aiming at a certain granite-type hard rock bituminous uranium ore in Jiangxi, when using conventional dilute sulfuric acid to leaching, dilute sulfuric acid and hydrogen peroxide are consumed, the leaching time is long, and the uranium leaching rate is low; in order to improve the leaching of the refractory hard rock uranium ore The comparative test of leaching uranium is carried out after magnetizing dilute sulfuric acid by using a rare earth permanent magnet internal magnetic processor. The test results: under the conditions of magnetic field strength of 610KA/m, magnetization time of 45min, fineness of -0.295mm content of 88%, sulfuric acid concentration of 21%, H2O2 dosage of 0.7%, and leaching time of 3.5h, the final leaching is obtained The slag contains 0.0092% uranium and the uranium leaching rate is 91.24%. Compared with the uranium leaching test under conventional conditions, the uranium leaching rate was increased by 8.98%, the uranium content of the leaching slag was reduced by 0.0168%, and the concentration of dilute sulfuric acid was reduced by 2%, the amount of H2O2 was reduced by 0.1%, and the leaching time was shortened by 0.5h. The magnetic field enhanced hard rock uranium ore leaching technology provides a new enhanced leaching method for hard rock uranium ore leaching technology, and also provides a technical reference for the leaching technology of the same type of mine.