关键词: 白泥脱硫, 理化特性, 白泥浆液, 白泥石膏

Abstract: White mud wet flue gas desulfurization has achieved industrial application,but physical and chemical properties of white mud desulfurization slurry and gypsum rarely reported.Therefore the physical and chemical properties of white mud desulfurization slurry and gypsum were studied.Moisture content and pH were measured.The physical and chemical properties of white mud,white mud slurry and white mud gypsum were analyzed by XRD,XPS,laser particle size distribution,ICP-MS,ion chromatograph dialogue and SEM. The influence of paper-making process to mud composition was considered,also the cause of the changes in color of white mud and white mud slurry was discussed.The results showed that the physical and chemical properties of white mud and limestone have obvious differences:The pH of white mud was higher than that of limestone,and the moisture content of white mud was up to 40%; Na,K,Mg content in white mud was higher than that of limestone; The soluble salt in white mud slurry was too high,but the heavy metal content was low; white mud gypsum quality is better,but the soluble salt may influence the application of gypsum.White mud can be used a wet flue gas desulfurization? absorbent instead of limestone,however,the effects of different physical and chemical properties between white mud and limestone in wet flue gas desulfurization require further research.

Key words: white mud desulfurization, physical and chemical properties, white mud slurry, white mud gypsum