Performance of Higher Column Leaching of Uranium Ore in Vein-group-type Deposit

The results of condition tests of higher column leaching of uranium ore are summarized in a vein-group-type uranium deposit. According to the detonation parameters of the in-situ blast leaching commercial trials of another uranium mine and Rosin-Rammlar Equation, the grain size distribution of the uranium ore was alloted. The leaching effects of the ores with different sizes and at different height in the column were studied. The results show that the ores in the deposit have advantages such as good leaching performance, less acid consumption and short leaching cycle. The change of the mass concentration gradient of uranium metal is obviously regular. After leaching for a certain time, the leaching rate can be greatly improved by adding a little oxidant. The results provide reference and basis for the commercial test of in-situ blast leaching of the deposit and the research of related technological parameters.