磷石膏常压酸溶液法制备二水硫酸钙晶须  

Preparation of Dihydrate Calcium Sulphate Whisker Using Phosphogypsum by Atmospheric Acidification Method

作　　者：耿庆钰 李建锡[1] 郑书瑞 段正洋 韩伟明[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《硅酸盐通报》2015年第12期3731-3736,共6页Bulletin of the Chinese Ceramic Society

摘　　要：以固体废弃物磷石膏为原料,利用常压酸化法制备二水硫酸钙晶须。采用均匀设计实验与单因素实验相结合的方法,研究了反应温度、料桨含固量、反应时间和盐酸质量分数对产物的影响,并且借助透射偏光显微镜、X射线衍射仪(XRD)等仪器对产物进行表征。实验结果表明,最佳反应条件为:反应温度80℃,料浆含固量0.20 g·m L-1,反应时间10 min,HCl质量分数20%。在此条件下制备出了外观均匀、长径比达到138.46且纯度在99.8%以上的的二水硫酸钙晶须产品,研究结果对磷石膏的高值化利用具有指导意义。Using solid waste phosphogypsum as raw material,dihydrate calcium sulphate whisker were prepared by the atmospheric acidification method. The products were characterized by transmission polarizing microscope,XRD,etc. This research combined uniform design method the experiments and single factor experiments. To study the influence of reaction temperature,paddle solid content,reaction time and mass fraction of hydrochloric acid on the product. The experimental results show that the best experimental conditions are reaction temperature 80 ℃,solid content in slurry 0. 20 g · m L-1,the reaction time of 10 min,HCl 20% mass fraction. Under the condition of the preparation of a uniform appearance,length to diameter ratio is 138. 46 and in more than 99. 8% of purity of dihydrate calcium sulphate whisker products. The results have guiding significance for the high value utilization of phosphogypsum.

关 键 词：磷石膏 常压酸化法 二水硫酸钙晶须 

分 类 号：U664[交通运输工程—船舶及航道工程]