Oxidative desulfurization method for high-sulfur magnetite concentrate

The invention relates to an oxidative desulfurization method for high-sulfur magnetite concentrate, wherein the process is a pre-oxidation-low intensity magnetic separation desulfurization process. The method is characterized in that the method is characterized by comprising the following steps; the method comprises the following steps of: mixing a strong oxidant with high-sulfur magnetite concentrate feed ore with sulfur content of more than 0.3 percent, and feeding the mixture into closed-loop ore grinding operation consisting of a mill and a cyclone; the strong oxidant and pyrrhotite are subjected to a redox reaction, the pyrrhotite is oxidized into Fe2 (SO4) 3 weak magnetic minerals and even non-magnetic minerals, the difference of specific magnetization coefficients of target mineralsand sulfur-containing impurity minerals is increased, then the pyrrhotite is removed through a low-intensity magnetic separation process, and magnetite concentrate with the sulfur content smaller than 0.2% is obtained; if th