基于电石渣为原料的涂层填料用球形碳酸钙的制备研究  

Study on preparation of spherical calcium carbonate for coating fillers based on carbide slag as raw materials

作　　者：张金君 郭琳琳 苗成朋 李星宇 庞亚恒 杨荣凯 于雅森 ZHANG Jinjun;GUO Linlin;MIAO Chengpeng;LI Xingyu;PANG Yaheng;YANG Rongkai;YU Yasen(College of Chemistry and Chemical Engineering,Cangzhou normal university,Cangzhou 061001,China;Cangzhou Blue Environmental Protection Technology Co.,Ltd.,Cangzhou 061000,China;School of Mines,North China University of Science and Technology,Tangshan 063509,China)

机构地区：[1]沧州师范学院化学与化工学院,河北沧州061001 [2]沧州市碧蓝环保科技有限公司,河北沧州061000 [3]华北理工大学矿业工程学院,河北唐山063509

出　　处：《无机盐工业》2025年第2期113-119,共7页Inorganic Chemicals Industry

基　　金：河北省自然科学基金面上项目(E2022110002);河北省教育厅科研项目(ZC2024129);沧州市自然科学基金面上项目(221001005D);沧州师范学院校内科研基金重点项目(XNJJLZD2021001);沧州师范学院“先进复合材料与涂层科研创新团队(cxtdl2302)”资助。

摘　　要：为制备满足涂层填料用的球形碳酸钙,实现固体废物电石渣的高附加值资源化利用,以电石渣为原料、氨水为添加剂、碳酸铵为碳化剂制备球形碳酸钙。研究了反应物加料顺序、反应温度、滴加速度、添加剂、反应物比例对碳酸钙形貌的影响。结果表明:在氨水、碳酸铵、氯化钙物质的量比为1.5∶1.5∶1的条件下向碳酸铵溶液中瞬时加入Ca^(2+)溶液,当搅拌速率为1500 r/min、反应温度为20℃、反应时间为30 min时制得的碳酸钙为球形,中位粒径(D50)为2.733μm,团聚指数为1.59;颗粒均匀,分散良好,产品纯度为97.67%。其晶型以球霰石为主,含有少量方解石。在以氨水为添加剂的条件下,通过调整制备工艺条件成功实现了球形碳酸钙的形貌控制。从降低原料成本和减少环境污染方面考虑,该工作为未来以电石渣为原料制备球形碳酸钙的工艺研究提供参考。To prepare spherical CaCO_(3) that met the requirements of coating fillers and simultaneously achieved high value-added resource utilization of solid waste carbide slag,spherical CaCO_(3) was prepared using carbide slag as raw materials,ammonia as additive,and(NH_(4))2CO_(3) as carbonizing agent.The effects of feeding order,reaction temperature,dropping speed,additive and reactant ratio on the morphology of CaCO_(3) were studied.The results indicated that spherical CaCO_(3) could be achieved under the condition of the ratio of the amount of ammonia,ammonium carbonate,and calcium chloride substances at 1.5∶1.5∶1,and when Ca^(2+)solution was instantly added to(NH_(3))2CO_(3) solution,and the stirring speed was 1500 r/min,and the reaction temperature at 20℃,and react for 30 min.The obtained CaCO_(3) were spherical with a par-ticle size(D50)of 2.733μm and an aggregation index of 1.59.The particles were uniform and well dispersed with a purity of 97.67%,in which the crystal form was mainly vaterite,containing a small amount of calcite.Under the condition of using am-monia as the additive,the morphology control of spherical calcium carbonate was realized by adjusting the preparation pro-cess conditions.From the perspective of reducing raw materials cost and reducing environmental pollution,which provided reference for the future process research of preparing spherical single crystal CaCO_(3) from calcium carbide slag as raw mate-rials.

关 键 词：涂层填料 球形碳酸钙 电石渣 氨水 碳酸铵 

分 类 号：O657.3[理学—分析化学]