Study on dehydration characteristics of desulfurization gypsum by thermal loss gravimetric method
ZHAO Hua
LIAO Hongqiang
SONG Huiping
CHENG Fangqin
Abstract：The thermal dehydration characteristics of FGD gypsum were respectively investigated by thermal gravimetric ana-lyzer (TGA) under different heating rates and temperatures at different final temperatures for a period of time. The results show that the higher heating rate increases,the higher the temperature of desulfurization gypsum water starting weightlessness and ending weightlessness,the faster desulfurization gypsum crystal water loss. What's more,the higher final temperature,the longer the desulfu-rization gypsum crystal water weightlessness starting time,the shorter weightlessness ending time,and the faster the desulfurization gypsum water loss rate. Final temperature is 1000 ℃,the desulfurization gypsum appears three times of weightlessness,the first weight loss is because of the desulfurization gypsum free water lost,the reason of second weight loss is the desulfurization gypsum crystal water lost,the third weight loss is caused by the decomposition of FGD gypsum impurities in calcium carbonate.
Keywords：desulfurization gypsumTGAdewatering characteristicsdehydration ratethe rate of weight loss
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 24-27 )