摘要:利用电石废渣制备得到了不同形貌的纳米级碳酸钙晶体。实验 过程包括：电石废渣经过提纯后制成CaCl₂溶液，然后在一定条件下和 （NH₄）₂CO₃溶液反应。在添加剂存在的情况下，制备出了纳米级碳酸钙 晶体。并对反应条件如物料的浓度、反应温度、添加剂种类及作用机理 进行探讨，确定了用电石废渣生产纳米碳酸钙的最佳方法，即控制温度 为25℃，物料浓度为1.5 mol/L，使用自制水溶性高分子添加剂，得到立 方形碳酸钙，使用硼砂等可得到链状碳酸钙,添加醇类有机物可得到针状 碳酸钙。 

关键词:电石废渣；碳酸钙；添加剂；形貌

Abstract: The nano-sized calcium carbonate is prepared by the CaCl2 liquid made by refined calcium carbide waste residue reacting with the（NH₄）₂CO₃depending on the additive.The reaction influencing conditions such as materiel concentration, reaction temperature, the species of additive and their function mechanism are studied. The best way of preparing nano-sized calcium carbon ate by calcium carbide waste residue is concluded, the temperature is 25 ℃, the concentration is 1.5 mol/L. The self-made macromolecule additive can lead to cubic calcium carbonate,the borax additive can lead to chain-like calcium carbonate,and the mellow additive can lead to needle calcium carbonate. 

Keywords: calcium carbide waste residue; calcium carbonate; additive; morphology