磷石膏矿化CO_(2)制备球霰石型碳酸钙试验研究  

Experimental study on preparation of vaterite-based calcium carbonate by CO_(2) mineralization with phosphogypsum

作　　者：乔静怡 陈秋菊 刘卓齐 丁文金[1,2] Qiao Jingyi;Chen Qiuju;Liu Zhuoqi;Ding Wenjin(Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Institute of Mineral Materials&Application,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学矿物材料及应用研究所,四川绵阳621010

出　　处：《化工矿物与加工》2023年第9期14-18,25,共6页Industrial Minerals & Processing

基　　金：四川省自然科学基金面上项目(2023NSFSC0348);四川省科技创新创业苗子工程重点项目(2023JDRC0070);四川省大学生创新创业训练计划项目创新训练项目(202210619021)。

摘　　要：以磷石膏为原料,采用氯化铵盐浸预处理方法获得磷石膏盐浸液,以该溶液为钙源矿化CO_(2)制备球形球霰石型碳酸钙。首先采用4因素3水平正交试验确定最佳试验条件,再通过XRD、SEM分析探究不同温度下产物的物相与形貌的变化规律,结果表明:不添加任何晶型控制剂,在碳化温度为22℃、氨水加入量为10.00%、搅拌速度为650 r/min、CO_(2)流速为0.3 L/min的条件下,可以得到球形球霰石型碳酸钙。在同一温度下,随着氨水加入量的增加,碳酸钙中球霰石含量升高。Spherical vaterite-based calcium carbonate was prepared by using phosphogypsum as raw material which was subject to pretreatment with ammonium chloride salt leaching process to produce phosphogypsum salt-leaching solution containing calcium to mineralize CO_(2).Firstly,the optimum experimental conditions were determined by performance of orthogonal test on four factors at three dosage levels,and then the changes of phase and morphology of the products at different temperatures were studied by means of XRD and SEM.The results show that spherical vate-ritebased calcium carbonate could be obtained without addition of any crystal control agent at the carbonization tempe-rature of 22℃,ammonia dosage of 10.00%,stirring speed of 650 r/min and CO_(2) flow rate of 0.3 L/min.At the same temperature,with the increase of ammonia dosage,the content of vaterite in calcium carbonate went up.

关 键 词：磷石膏 CO_(2)矿化 碳酸钙 球霰石 正交试验 氨水加入量 

分 类 号：X781[环境科学与工程—环境工程]