北京科技大学学报Issue(1)：30-34,5.DOI:10.13374/j.issn2095-9389.2015.01.005
12 CaO·7 Al2 O3晶体结构及其氧化铝浸出性能
Crystal structure and Al2 O3 leaching properties of 12 CaO·7 Al2 O3
摘要
Abstract
Calcium aluminate clinkers, in which the mass ratio of Al2O3 to SiO2(A/S) is 5, were prepared at 1500℃ for 1 h by proportioning pure reagents. The alumina leaching properties and crystal structure of 12CaO·7Al2 O3 in the clinkers with different molar ratios of CaO unbonded with SiO2 to Al2 O3 ( C/A) were studied. The effect mechanism of C/A on the clinkers was also discussed by X-ray diffraction and X-ray fluorescence analysis. When C/A is 1. 0 to 1. 4, the alumina-leaching ratio improves because the amount of 12CaO·7Al2O3 increases with increasing C/A. When C/A is 1. 4, the alumina-leaching ratio reaches the maximum value of 93. 30%. In this case, 12CaO·7Al2 O3 with defects forms, and the amount of substance of CaO is less than 11. 3 mol. With the further increase of C/A, the alumina-leaching ratio decreases, which is because the preferred orientation of 12CaO·7Al2 O3 changes from the (211) crystal plane into the (420) crystal plane.关键词
铝酸钙/熟料/烧结/晶体结构/氧化铝/浸出Key words
calcium aluminate/clinkers/sintering/crystal structure/alumina/leaching分类
冶金工业引用本文复制引用
于海燕,王波,潘晓林,毕诗文..12 CaO·7 Al2 O3晶体结构及其氧化铝浸出性能[J].北京科技大学学报,2015,(1):30-34,5.基金项目
国家自然科学基金资助项目(51174054,51374065) （51174054,51374065）
中国博士后科学基金资助项目(2012M510821) （2012M510821）
