Method for leaching vanadium slag in converter by electro-catalytic oxidation

The method discloses a method for leaching vanadium slag in a converter by electro-catalytic oxidation. In the method, the vanadium slag in the converter is mixed with MnSO4 and H2SO4 to obtain slurry and then leaching is conducted by non-membrane electro-catalytic oxidation; and after the leached ore slurry is filtered and separated, the vanadium in the obtained leaching solution is extracted through conventional ammonium salt (ammonium sulfate) vanadium precipitation so as to prepare vanadium pentoxide. During the leaching, the low-valent vanadium which is not easily leached in the vanadium slag is oxidized into high-valent vanadium which is easily leached by an anode-generated strong oxidant Mn3+ so that the leaching rate of the vanadium is improved by using an electro-catalytic oxidation method to leaching the vanadium slag, therefore, the problems of high energy consumption and high pollution in the traditional leaching methods are avoided, otherwise, the method is also suitable for the extraction of the vanadium in the raw materials including vanadium and the selective leaching of molybdenite concentrate; meanwhile, the method has the characteristics of being good in selectivity, moderate in technological condition, free of pollution and the like, therefore, a novel environmentally friendly wet decomposition method is provided.