Abstract: To efficiently utilize a refractory iron ore containing sulfur from Liaoning and achieve the comprehensive recovery
of iron and sulfur resources,this study conducted a detailed process mineralogy analysis. It revealed that the characteristics
of close symbiosis between iron minerals (mainly magnetite) and sulfur minerals (mainly pyrrhotite and pyrite) in the ore and
their adverse effects on separation were clarified. Accordingly,a novel "magnetic-flotation-magnetic" separation flowsheet was
proposed. Through systematic conditional tests,an effective reagent regime was established,employing isopropyl xanthate as the
collector and a combination of oxalic acid and copper sulfate as activators. The closed-circuit test results demonstrated that a final
iron concentrate with yield of 30. 12%,iron grade of 67. 20%,and sulfur content of 0. 36% could be obtained,alongside
sulfur concentrate with yield of 3. 75% and sulfur grade of 32. 30%. This process successfully achieved the efficient separation
and comprehensive recovery of iron and sulfur,offering a viable technical solution for processing similar refractory iron ore resources
containing sulfur.

Key words: magnetite,pyrrhotite,stage separation,iron-sulfur separation,magnetic-flotation-magnetic combined process