In　the　zinc　production　industry　using　Mn-rich　zinc　ore,　substantial　quantities　of　anodic　slime　are　generated　during　electrolytic　zinc　production,　containing　∼　40　%　Mn　and　∼　3　%　Pb.　While　a　valuable　secondary　resource,　this　material　poses　environmental　risks　as　solid　waste.　Conventional　reductive　leaching　methods　rely　on　costly　reductants　and　generate　high　carbon　emissions.　This　study　introduces　a　process　utilizing　flue　gas　from　zinc　plants　as　a　reductant,　achieving　92　%　Mn　leaching　efficiency　while　simultaneously　extracting　25　%　Sr　and　fixing　92　%　SO2　as　sulfate　in　solution.　Kinetic　analysis　shows　a　mixed　control　model　with　an　activation　energy　of　13.83　kJ/mol,　with　reaction　rates　further　enhanced　by　optimizing　gas　inlet　design.　The　MnSO4-rich　leachate　is　processed　into　battery-grade　MnSO4　powder,　and　Sr　is　recovered　as　SrCO3,　suitable　for　use　as　an　additive　in　electrolytic　zinc　processes.　Additionally,　NaOH　consumption　for　flue　gas　desulfurization　decreases　significantly　from　2.14　kg　to　0.17　kg　per　Nm3.　Economic　evaluation　indicates　reagent　costs　represent　only　2　%　of　the　total　value　of　MnSO4　and　SrCO3　products,　offering　a　sustainable　pathway　for　anodic　slime　utilization　and　SO2　mitigation　in　zinc　smelting.　©　2025　Elsevier　B.V.