氯化铵浸取电石渣制备碳酸钙研究  

Preparation of calcium carbonate with carbide slag leached by ammonium chloride

作　　者：郭琳琳[1,2] 徐美[1] 刘博静[1] 王洪敏[1] 

机构地区：[1]沧州师范学院化学与化工学院,河北沧州061001 [2]天津大学材料科学与工程学院,天津300350

出　　处：《应用化工》2017年第9期1757-1760,共4页Applied Chemical Industry

基　　金：河北省教育厅高等学校科学技术研究项目(ZC2016092);河北省沧州市渤海新区管委会资助课题

摘　　要：电石渣105℃干燥,以氯化铵溶液为浸取剂,提取电石渣中的钙资源以制备碳酸钙。研究表明,反应时间30 min、pH=8、氯化铵过量程度为0的条件下,电石渣中的Ca^(2+)提取率最高,为93.31%。以Na_2CO_3溶液为碳化剂进行碳化反应,得碳酸钙产率90.76%,纯度97.67%。XRD和SEM分析表明,产品为球霰石型碳酸钙,颗粒呈类球形团聚,粒径为1~3μm。After the carbide slag was dried at 105 ℃ to prepared the calcium carbonate with carbide slag as resources was studied. The calcium in carbide slag can be easily and quickly leached by ammonium chloride. Study shows the maximal extraction percentage of Ca2＋ is 93. 3 1 % under the optimized condi-tions that reaction time for 30 min, pH =8 and excessive degree of ammonium chloride is 0. With sodium carbonate as carbonize agent, the productivity of calcium carbonate is 90. 7 6 % , the purity is 97. 67%. XRD and SEM shows that vaterite calcium carbonate was obtained. The amorphous of the particle is ball-shaped with a particle size of 1-3μm.

关 键 词：电石渣 氯化铵 提取率 碳酸钙 球霰石 

分 类 号：TQ420.9[化学工程] TU59[建筑科学—建筑技术科学]