The evaluation of various oxidants used in acid leaching ...
THE EVALUATION OF VARIOUS OXIDANTS USED IN ACID LEACHING OF URANIUM 449 In the 1950s through to 1990s in excess of 20 Witwatersrand uranium plants used pyrolusite as oxidant in the leach in preference to the auto oxidation process, which introduced SO 2 and air into the leach to oxidize the ferrous iron to ferric iron, as a result of cheap ...