Calcium　carbide　Slag　is　one　kind　of　industrial　wastes　from　CaC2　hydrolysis　reaction　that　will　cause　land　pollution.　In　the　research,　calcium　carbide　Slag　used　as　a　substitute　for　limestone　to　produce　cement　clinker,　which　with　a　high　portion　of　CaO　content　and　then　an　excellent　calcium　containing　raw　material.　As　a　kind　of　industrial　wastes,　the　properties　of　Calcium　carbide　slag　differentiate　from　that　of　natural　limestone.　The　formation　process　of　clinker　minerals　was　studied　by　means　of　XRD.　The　results　indicated　that　clinker　minerals　formation　is　similar　to　that　from　use　of　limestone.　The　generated　clinker　has　a　rational　mineral　composition　and　well　developed　mineral　phase　structure.　But,　there　are　many　differences　in　decomposition　temperatures　between　the　calcium　containing　raw　materials.　Therefore,　the　carbide　slag　can　be　used　as　a　substitute　of　limestone　raw　material　to　produce　cement　clinker.　©　(2013)　Trans　Tech　Publications,　Switzerland.