1·Choosing potassium sulfate as an activator to stimulate the activity of natural anhydrite, and modified its properties by adding Portland cement and hemihydrate gypsum respectively.
选取硫酸钾作为激发剂对天然硬石膏进行活性激发，并分别掺入硅酸盐水泥与半水石膏进行改性。
2·Potassium sulfate accelerate the speed of the reaction, thus it reduce the setting time.
硫酸钾能加速凝固反应速率，缩短凝固时间。
3·Aluminium borate melting block was prepared by the combination of boric acid, anhydrous alum and potassium sulfate.
采用硼酸和无水明矾及硫酸钾压块、焙烧、制备硼酸铝熔块。
4·Laboratory study on preparing potassium sulfate from the Washing Liquor of salt slurry is introduced. Its feasibility is described through the analysis to phase diagram and experiment.
通过以盐浆洗液为原料制取硫酸钾的实验研究，并通过相图分析和实验论证了该工艺的可行性。
5·When the purity of potassium sulfate crystal is lower and the content of the potassium phosphogypsum is higher, the median diameter of crystal particle and the density of suspension are higher.
结果表明：当硫酸钾结晶产品纯度较低、钾石膏含量较高时，晶体平均粒径及悬浮密度均较大；