The　separation　and　purification　of　kish　graphite　is　an　important　prerequisite　for　its　high　value　and　com-prehensive　utilization.　The　comprehensive　separation　process　including　water　washing　dust　removal,　magnetic　separation　and　acid　leaching　purification　can　effectively　enrich　and　purify　kish　flake　graphite　(KFG)　from　low-cost　industrial　by-product　kish　graphite.　When　the　magnetic　strength　is　2000　Gauss,　the　purified　KFG　has　suitable　recovery　(57.34%),　high　fixed　carbon　content　(99.38%)　and　low　ash　content　(0.62%).　Compared　with　natural　flake　graphite,　KFG　has　a　highly　ordered　graphite　microcrystalline　layer　structure　with　higher　graphitization　degree　(99.77%)　and　well-developed　micro/nanopore　with　larger　specific　surface　area　(4.12　m2　center　dot　g-1).　Such　distinctive　microstructure　features　ensure　KFG　to　be　applied　as　a　cathode　material　for　aluminum　ion　batteries　(AIBs)　to　exhibit　superior　electrochemical　behaviors.　KFG　exhibits　a　high　re-versible　specific　capacity　(110.7　mAh/g　at　50　mA/g),　outstanding　rate　capability　(56.9　and　26.6　mAh/g　at　high　current　densities　of　1000　and　2000　mA/g)　and　superior　long-term　cycling　stability　(101.8　mAh/g　with　a　Coulombic　efficiency　of　99.5%　at　1000　mA/g　after　2000　cycles).　This　study　demonstrates　a　promising　fea-sibility　for　mass　production　of　KFG　from　industrial　by-product　kish　graphite　for　high　performance　AIBs.　(c)　2023　Elsevier　B.V.　All　rights　reserved.