An　alunite　concentrate　is　obtained　by　flotation　of　copper　mine　tailings,　which　is　rich　in　Al,　K　and　Ga　and　other　valuable　metals.　In　order　to　utilize　alunite　concentrate　comprehensively,　firstly　a　＇calcination-cascade　leaching＇　process　was　proposed　to　selective　leaching　of　Al,　K　and　Ga.　Then,　the　combination　of　cooling　crystallization　and　evaporative　crystallization　processes　were　adopted　to　extract　alum　and　aluminum　sulfate.　Finally,　the　gallium　was　enriched　by　neutralization　method.　After　roasting　and　one-stage　acid　leaching,　the　leaching　rates　of　Al　and　K　after　calcining　alum　stone　concentrate　are　80.31%　and　87.49%,　respectively,　and　gallium　can　hardly　been　leached　out.　At　the　second-stage　acid　leaching　process,　the　leaching　rates　of　Al,　Ga　and　K　are　65.67%,　86.17%　and　94.54%,　respectively.　After　cooling　crystallization　and　evaporative　crystallization,　a　food-grade　alum　with　purity　of　99.65%　and　a　firsts　aluminum　sulfate　with　Al2O3　content　of　15.95%　are　sequently　obtained　from　one-stage　livixium.　Ga　concentrate　with　content　of　1500　g/t　is　obtained　by　controlling　the　pH　value　of　2.5-2.6　at　second-stage　lixivium　with　NaOH,　and　the　precipitation　rate　of　Ga　is　98%.　XRD　analysis　results　show　that　the　occurrence　state　of　Ga　in　the　sediment　after　calcination　is　KGa(SO4)2.　©　2018,　Science　Press.　All　right　reserved.