To　investigate　the　microwave　heating　mechanism　of　composite　minerals,　a　circumferential　stirring　model　based　on　the　Arbitrary　Lagrangian-Eulerian　(ALE)　method　was　established　by　COMSOL　Multiphysics　software.　This　model　aims　to　study　the　temperature　rise　characteristics　of　mineral　models　with　different　component　structures　and　proportions.　The　results　show　that　the　heating　efficiency　and　uniformity　of　the　mineral　are　higher　in　the　stirred　heating　model　with　a　5　cm　copper　disc　rotating　at　(π/3)　rad/s　compared　to　the　non-stirred　heating　model;　The　different　component　structures　of　the　composite　mineral　result　in　different　electromagnetic　wave　distributions,　which　induces　the　microwave　heating　efficiency　of　the　py-rite-enclosed　calcite　model　is　lower　than　the　calcite-enclosed　pyrite　model;　In　the　calcite-en-closed　pyrite　model,　the　variation　of　pyrite　thickness　changes　the　phase　of　electromagnetic　wave,　leading　to　the　displacement　of　hot　and　cold　spots　in　the　mineral.　Furthermore,　when　comparing　the　pyrite　thicker　and　thinner　than　the　penetration　depth,　there　is　a　significant　disparity　in　the　incident　electromagnetic　wave　intensity,　resulting　in　noticeable　differences　in　electric　field　strength;　At　the　same　component　proportion,　the　overall　electric　field　of　heterogeneous　minerals　is　lower　and　more　stable,　and　the　electric　field　intensity　between　components　is　closer　than　in　composite　homogeneous　minerals;　With　the　proportion　of　pyrite　increases,　the　temperature　variation　of　heterogeneous　minerals　after　30　s　microwave　heating　can　be　divided　into　three　regions:　small　peak　region　(0-10%),　large　peak　region　(10%　-　50%),　and　stable　region　(50%　-　75%),　and　the　temperature　differences　between　components　gradually　decrease.　©　2024　China　University　of　Mining　and　Technology.　All　rights　reserved.