摘   要：以江阴某发电厂排放的烟气脱硫石膏为原料，再加工热处理后，研究热处理脱硫石膏水化体系的强度和凝结时间。结果显示，再加工处理温度达150℃时，相应水化体系的施工性能和力学强度较优。采用XRD、DTA/TG、FTIR法分析各再加工热处理石膏水化体系的水化过程发现，二水石膏为各体系中主要的水化产物，且随着石膏再加工温度的不同，各项微观性能测试特征也有所不同，其结果体现与宏观力学强度的变化规律一致。

Abstract：Flue gas desulfurization gypsum from a power plant in Jiangyin was processed by heat treatment, and the strength and setting time of hydration system with heat-treated desulfurization gypsum were studied. The results show that when the processing temperature is up to 150℃, construction performance and mechanical strength of the corresponding hydration system are better. By using the analyze methods of XRD, DTA/TG and FTIR, hydration process of hydration system with heat-treated gypsum can be determinated, and it can be shown that hydration product of the waste gypsum is mainly dihydrate gypsum. With the changing of processing temperature of the waste gypsum, the micro performances of hydration system are different, and the change law is in accordance with that of mechanical property.