Sulfide　ores　are　susceptible　to　oxidation　in　air,　posing　a　risk　of　spontaneous　combustion.　This　oxidation　process　generates　toxic　and　harmful　acidic　gases,　which　endanger　human　health　and　cause　equipment　corrosion.　To　effectively　prevent　spontaneous　combustion　of　sulfide　ore,　this　paper　studies　the　desulfurization　and　self-heating　characteristics　of　ores　before　and　after　microwave　radiation.　Firstly,　orthogonal　experiment　and　control　variable　method　were　used　to　study　the　effect　of　heating　rate　of　sulfide　ore　in　microwave　environment　on　desulfurization　rate.　Secondly,　thermal　analysis　technique　was　employed　to　understand　the　self-heating　characteristics　of　the　ore　in　different　microwave　temperature　rising　rates.　Also,　spontaneous　combustion　risk　of　different　sulfide　ores　was　assessed　based　on　the　method　of　oxidation　mass　gain.　Finally,　the　microscopic　morphology　and　chemical　composition　of　sulfide　ores　with　different　microwave　heating　rates　were　revealed　by　material　analysis.　The　study　shows　that　the　desulfurization　rate　of　sulfide　ore　increased　with　the　increase　of　microwave　radiation　heating　rate.　Microwave　desulfurization　can　enhance　the　thermal　stability　of　sulfide　ore　and　restrain　its　self-heating　ability.　When　the　higher　microwave　heating　rate　is　used　to　treat　the　sulfide　ore,　the　hazard　of　spontaneous　combustion　can　be　significantly　reduced.　Cracks　in　sulfide　ores　can　be　caused　by　microwave　heating　conditions.　As　temperature　rising　rate　increases,　the　amount　of　FeS2　converted　to　FeS　increases,　and　the　content　of　pyrite　decreases.　©　Akadémiai　Kiadó　Zrt　2025.