As　a　kind　of　fundamental　industrial　material,　calcium　carbonates　have　been　widely　used　in　the　area　of　metallurgy,　plastics,　food　and　pharmaceutical　industry.　This　study　introduces　a　prototype　for　the　preparation　of　mono　dispersed　calcite　by　using　carbide　slag　as　raw　material.　It　was　found　that　the　leaching　rate　of　the　slag　could　be　significantly　increased　with　help　of　the　coordination　effect　of　citrate　anions　to　calcium　cations.　Calcium　carbonate　precipitates　are　prepared　by　the　carbonation　of　the　leachate,　in　which　citrate　anion　also　displays　a　strong　surface　effect　during　the　crystallization　process　of　calcium　carbonate　nanocrystals.　Moreover,　it　reveals　that　the　terminal　pH　condition　of　the　carbonated　leachate　is　another　key　controlling　factor,　not　only　for　the　polymorphs　and　morphologies　of　calcium　carbonates,　but　for　the　recycling　of　the　leachate.　If　the　terminal　pH　was　set　to　be　11,　the　homogeneous　calcite　micro/nanorods　crystals　could　be　successfully　obtained,　simultaneously　the　citrate　solution　could　be　reused　in　the　second　leaching.　Lower　terminal　pH　will　lead　to　the　increase　of　carbonate　anions　concentration　and　in　turn　the　decrease　of　leaching　rate　of　calcium　cations.　The　way　demonstrated　here　provides　a　valuable　prototype　for　the　high-value　reutilization　of　the　Ca-containing　industrial　solid　waste.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.