摘要
研究了盐石膏在某一硫酸盐激发剂的作用下的水化与转晶过程,使其由无水硫酸钙转化为二水硫酸钙,从而使颗粒的粒径明显增大,有利于固液分离,降低盐石膏的含盐量。通过25℃单因素试验与正交试验,确定盐石膏转晶的最佳控制条件为:激发剂溶液浓度0.20 moL/L,转晶时间54 h,搅拌速率200 r/min,水膏比10∶1,在该操作条件下得到的晶体平均粒径为76.49μm。
The hydration and crystal transformation of salt gypsum under the affect of one kind of sulfate was discussed in this essay,which transformed salt gypsum from calcium sulfate anhydrous to calcium sulfate dehydrate accompanying the increasing of the average particle diameter,improved the separation of salt gypsum and the mother liquor,decreased the sodium chloride contents of salt gypsum.According the result of single factor test and orthogonal test under the 25 ℃,the optimal condition of the crystal transformation was decided as follows： the concentration of the activator solution is 0.20 moL/L,the total time of the crystal transformation is 54 h,the stirring rate is 200 r/min,the proportion of salt gypsum and the water is 10 ∶ 1 on weight.Following the above condition,the average particle diameter of the crystal is 76.49 μm.
出处
《盐业与化工》
CAS
2011年第1期1-4,11,共5页
Jounral of Salt and Chemical Industry
关键词
盐石膏
激发剂
转晶
平均粒径
salt gypsum
activator
crystal transformation
the average particle diameter
