低配钙CaO-Al_2O_3-SiO_2系烧结物相形成规律  

Mineral transformation of CaO-Al_2O_3- SiO_2 system with low lime addition during sintering process

作　　者：张迪[1] 潘晓林[1] 于海燕[1] 韩月娇[1] 翟玉春[1] 毕诗文[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《轻金属》2015年第9期15-19,共5页Light Metals

基　　金：国家自然科学基金资助项目(51174054;51374065)

摘　　要：本文以分析纯化学试剂α—Al2O3、SiO2和CaCO3为原料，研究了烧结温度为1350℃，Al2O3与SiO2质量比为3.0，CaO与Al2O3摩尔比（C／A）为0．9～1．4时CaO-Al2O3-SiO2系物料的物相转化机制、熔化温度、氧化铝浸出性能和粉化性能。结果表明：C／A〈1．0时，熟料物相为γ-Ca2SiO4、CaAl2O4、Ca12Al14O33和Ca2Al2Si07；1．0≤C／A≤1．4时，熟料物相为γ-Ca2SiO4、CaAl2O4和Ca12Al14O33；提高C／A可以促使Ca2Al2SiO7结合CaO转化成γ-Ca2SiO4、CaM2O4和Ca12Al14O33，CaAl2O4进一步结合CaO生成Ca12Al14O33。随着C／A的升高，物料的熔化温度升高，熟料氧化铝浸出性能和粉化性能先增大后减小。The mineral transformation, melting temperature, alumina leaching and pulverization property of clinker in CaO - Al2O3 - Si02 system are studied by using analytical reagents a - Al2O3, SiO2 and CaCO3 as raw materials sintered at 1350℃ when the mass ratio of Al2O3 to SiO2 is 3.0 and the molar ratios of CaO to Al2O3 （C/A） are 0.9 - 1.4. The results show that the mineral phases in the clinker are γ- Ca2SiO4, CaAl2O4, Ca12Al14O33 and Ca2Al2SiO7 when C/A is below 1.0, while the mineral phases are γ - Ca2SiO4 , CaAl2O4 and Ca12Al14O33 when C/A is between 1.0 and 1.4. Increasing C/A both promotes the transformation of Ca2A12SiO7 reacting with CaO to form γ - Ca2SiO4 , CaAl2O4 and Ca12Al14O33, and the transformation of CaAl2O4 reacting with CaO to form Ca12Al14O33. The melting temperature increases gradually, alumina leaching and pulverization property of clinker in- creases and then decreases with the increase of C/A.

关 键 词：铝酸一钙 CAO-AL2O3-SIO2 自粉 物相转化 

分 类 号：TF821[冶金工程—有色金属冶金]