Method and system for deep desulfurization treatment of iron ore concentrates

The invention discloses a method and system for deep desulfurization treatment of iron ore concentrates. The method comprises the following steps: magnetic separation treatment->pulping treatment->oxidation treatment->aging treatment; first ore pulp is obtained by pulping; an oxidizing agent is added into the first ore pulp and the first ore pulp is made to have a sufficient oxidation reaction with the ore pulp; the ore pulp after undergoing the oxidation reaction is conveyed into an aging reactor and stirring and aging treatment are performed to obtain second ore pulp, and SO2 gas generated by the aging reaction and the oxidation reaction is absorbed by adopting sodium salt to obtain sulfite; and the second ore pulp is conveyed to a thickening well through a conveying pipeline for concentration, then sulfur is obtained after overflow recovery, and the low-sulfur iron ore concentrates are obtained after underflow is dehydrated through subsequent dehydration operation. According to the technical scheme provide