摘要
运用连续流动法,在MSMPR结晶器中系统研究了石膏二步法制硫酸钾第一阶段中停留时间、结晶温度、进料配比及(NH4)2CO3质量分数对CaCO3结晶过程的影响,确定了适宜的结晶工艺条件。并采用间歇法考察了多种絮凝剂和表面活性剂改善CaCO3结晶的效果。结果表明,加入适量十二烷基苯磺酸钠和异丙醇可促进CaCO3结晶生长。
The effect of some factors on the crystallization of CaCO_3 in the process of potassium sulfate production by the two-step conversion of gypsum was investigated in a continuous MSMPR crystallizer such as residence time, temperature, ratio of feedstock and mass percent of (NH_4)_2CO_3. The optimum crystallization process conditions were gained. In the batch experiment, the effects of additives of flocculants and surfactants on CaCO_3 crystal growth were discussed. The results show the crystallization process can be improved by adding the dodecyl benzene sulfonic acid sodium salt and isopropanol.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2005年第3期8-12,共5页
Chemical Engineering(China)
关键词
碳酸钙
结晶过程
添加剂
石膏
二步法
calcium carbonate
crystallization
additives
gypsum
two-step conversion
