化工学报2016，Vol.67Issue(z1)：296-301,6.DOI:10.11949/j.issn.0438-1157.20151808
Al3+、Na+和Mg2+对二水硫酸钙结晶的影响
Influence of Al3+, Na+ and Mg2+ on crystallization of calcium sulfate dihydrate
刘同海 1窦焰 1方羊 1崔鹏 1沈浩 2郑之银 2刘荣2
作者信息
- 1. 合肥工业大学化学与化工学院,安徽合肥230009
- 2. 安徽六国化工股份有限公司,安徽铜陵244000
- 折叠
摘要
Abstract
The system,including CaHPO4 · 2H2O-H2SO4-H3PO4-H2O,is utilized to simulate wet process for phosphoric acid production.Based upon the slurry composition of phosphate mineral analysis,according to single factor experimental demands,the influence of Al3+,Na+ and Mg2+ on crystallization and washing rate of CaSO4 · 2H2O were investigated.The result indicated that,it is beneficial for the size of CaSO4 · 2H2O crystals when adding Al3+into the system.Na+ as the form of 0.9％ (mass) Na2O in the slurry also caused agglomeration of CaSO4 · 2H2O crystals.We also found that it is helpful for the washing rate.But when Mg2+ was added into the system,the unfavorable impact such as increasing the viscosity of solution,seriously influencing crystal growth and washing rate.For our target production,CaSO4 · 2H2O crystal,XRD,SEM were adopted to characterize the products during the process.The results showed that crystal growth conforms to Burton-Cabrera-Frank model.The impurity ions change the reaction rate and crystal plane growth rate.关键词
反应/结晶/离子/制备/二水硫酸钙Key words
reaction/crystallization/ions/preparation/calcium sulfate dihydrate分类
化学化工引用本文复制引用
刘同海,窦焰,方羊,崔鹏,沈浩,郑之银,刘荣..Al3+、Na+和Mg2+对二水硫酸钙结晶的影响[J].化工学报,2016,67(z1):296-301,6.
