掺SO_3硅酸盐水泥熟料中矿物相形成过程研究  

Phase Formation of SO_3 Doped Portland Cement Clinker

作　　者：许捷[1] 黎学润[1] 沈晓冬[1] 

机构地区：[1]南京工业大学材料科学与工程学院材料化学工程国家重点实验室,南京210009

出　　处：《硅酸盐通报》2013年第4期554-559,571,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家重点基础研究发展计划(973)项目(2009CB623100);江苏高校优势学科建设工程资助项目;长江学者和创新团队发展计划(IRT1146)

摘　　要：研究了工业原料配料生料中SO3含量为3%时,熟料主要矿物形成过程与含量变化。重点观察了C4A3$(硫铝酸钙)在烧成过程中的变化情况。借助DSC-TG,X射线衍射法及岩相分析对水泥熟料的烧成过程进行了研究。结果表明,熟料中,C4A3$在1050℃时即可形成,1290℃开始分解为C3A和C$;1350℃后C3S开始大量形成,1450℃取出急冷,f-CaO的含量小于1%,熟料中有6.2%C4A3$。1450℃保温不同0.5 h后,C4A3$完全分解。对熟料矿物形成量进行理论计算,结果与实验结论一致。Impact of the addition of 3% SO3 on the formation of cement clinker minerals in industrials clinker was investigated. Variation of the C4A3 $ during sintering process was taken into account. Sintering process of the cement clinker was investigated with DSC-TG, X-ray diffraction and microscopic analysis. Results showed that with a higher SO3 content existed, C4A3 $ could formed at 1050 ℃ and decomposed to C3A and C $ from 1290 ℃ ; C3S formed after 1350 ℃ and f-CaO content dropped to 1% at 1450 ℃. The final clinker had 6.2% C4A3 $. C4A3 $ decomposed completely when held for 0.5 h at 1450 ℃. Calculation of the theoretical mineral formation was in agreement with the above conclusions.

关 键 词：水泥 SO3 TG—DSC XRD 岩相分析 

分 类 号：TQ172[化学工程—水泥工业]