重庆理工大学学报(自然科学版)
重慶理工大學學報(自然科學版)
중경리공대학학보(자연과학판)
JOURNAL OF CHONGQING INSTITUTE OF TECHNOLOGY
2014年
8期
44-49
,共6页
硅酸盐水泥%熟料烧成%阴离子掺杂%矿化%易烧性
硅痠鹽水泥%熟料燒成%陰離子摻雜%礦化%易燒性
규산염수니%숙료소성%음리자참잡%광화%역소성
portland cement%clinker sintering%anion doping%mineralization%burnability
选用NaF,CaF2,CaSO4·2H2O,Ca3(PO4)24种化合物作为掺杂剂,研究阴离子掺杂对硅酸盐水泥熟料烧成的影响。通过X射线衍射分析、扫描电镜和甘油乙醇法分析了1250℃和1350℃下煅烧熟料的矿物组成、形貌以及游离氧化钙含量。结果表明:NaF,CaF2对生料易烧性有显著的促进作用,可以降低烧成温度约100℃,可作为有效改善熟料烧成的矿化剂,其中CaF2比NaF效果更为明显;Ca3(PO4)2在高温下能明显促进熟料矿物的形成,能形成大量C3 S的最佳掺杂含量约1%;单独掺CaSO4对生料易烧性无明显作用,但可提高液相的生成量,降低液相粘度。
選用NaF,CaF2,CaSO4·2H2O,Ca3(PO4)24種化閤物作為摻雜劑,研究陰離子摻雜對硅痠鹽水泥熟料燒成的影響。通過X射線衍射分析、掃描電鏡和甘油乙醇法分析瞭1250℃和1350℃下煅燒熟料的礦物組成、形貌以及遊離氧化鈣含量。結果錶明:NaF,CaF2對生料易燒性有顯著的促進作用,可以降低燒成溫度約100℃,可作為有效改善熟料燒成的礦化劑,其中CaF2比NaF效果更為明顯;Ca3(PO4)2在高溫下能明顯促進熟料礦物的形成,能形成大量C3 S的最佳摻雜含量約1%;單獨摻CaSO4對生料易燒性無明顯作用,但可提高液相的生成量,降低液相粘度。
선용NaF,CaF2,CaSO4·2H2O,Ca3(PO4)24충화합물작위참잡제,연구음리자참잡대규산염수니숙료소성적영향。통과X사선연사분석、소묘전경화감유을순법분석료1250℃화1350℃하단소숙료적광물조성、형모이급유리양화개함량。결과표명:NaF,CaF2대생료역소성유현저적촉진작용,가이강저소성온도약100℃,가작위유효개선숙료소성적광화제,기중CaF2비NaF효과경위명현;Ca3(PO4)2재고온하능명현촉진숙료광물적형성,능형성대량C3 S적최가참잡함량약1%;단독참CaSO4대생료역소성무명현작용,단가제고액상적생성량,강저액상점도。
Effects of anion doping on clinker sintering of silicate cement were investigated using NaF, CaF2,CaSO4·2H2O,Ca3(PO4)2 as compound dopants.The mineral phase structure,morphology and free lime content of clinker sintered at 1 250℃and 1 350℃were characterized by X-ray diffrac-tion,scanning electron microscope and glycerin-ethanol method,respectively.The results show that NaF,CaF2 as effective mineralizers facilitating clinker sintering,especially for CaF2 ,can significantly improve the burnability of cement raw meal and decrease sintering temperature by about 100 ℃.Ca3 (PO4 )2 can evidently promote the formation of clinker minerals sintered at elevated temperature and its optimal doping content approximates 1%.Singly doping CaSO4 will give rise to liquid-phase yield and decrease its viscosity despite of the limited effects on burnability of cement raw meal.