摘要
通过高温烧结法在不同钙铝比(C/A)的条件下合成了铝酸钙熟料。利用XRD对不同C/A下合成产物进行物相分析,对含量进行半定量分析,并计算其晶格常数。采用SEM观察不同C/A下合成产物的显微结构,并通过EDS佐证所得物相;最后研究了不同C/A下氧化铝的溶出性能。结果表明:当C/A<1.6时得到的产物为CaO·Al2O3和11.3CaO·7Al2O3(C11.3A7),且随着C/A的增大,C11.3A7的含量增高,氧化铝的溶出率提高;当C/A=1.6时得到的产物只有C11.3A7,溶出率达到最大;当C/A>1.6时由于3CaO·Al2O3的形成,溶出率有所降低。C11.3A7晶格中CaO的缺失,促进了溶出反应的进行。
Calcium aluminate clinkers with different calcium/aluminum ratios （C/A） were obtained by the high-temperature sintering method. Phase composition, phase semi-quantitative content and crystal constant of sinter were studied with different C/A by XRD. SEM and EDS were used to observe microstructure and element contents. The alumina leaching property of sinter was studied. When C/A was lower than 1.6, the products were CaO·Al2O3and 11.3CaO·7Al2O3 （C11.3A7） and increase of calcium/aluminum ratio could lead to increase in the content of C11.3A7and leaching ratio of alumina. When C/A was 1.6, the phase was almost completely C11.3A7and the leaching rate of alumina reached a maximum. When C/A was higher than 1.6, the products were C11.3A7and 3CaO·Al2O3, and the leaching rate of alumina decreased accordingly. The lack of CaO in C11.3A7lattice improved the leaching reaction.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2014年第10期4183-4190,共8页
CIESC Journal
基金
国家自然科学基金项目(51104053)
中国博士后科学基金项目(2012M510821)
河北省自然科学基金项目(E2012208047)~~
