WANG Bo, ZONG Shufeng, SUN Huilan, et al. Influence of calcium/aluminum ratio on microstructure and leaching of 11.3CaO·7Al2O3[J]. CIESC Journal, 2014, (10): 4183-4190. DOI: 10.3969/j.issn.0438-1157.2014.10.057.
WANG Bo, ZONG Shufeng, SUN Huilan, et al. Influence of calcium/aluminum ratio on microstructure and leaching of 11.3CaO·7Al2O3[J]. CIESC Journal, 2014, (10): 4183-4190. DOI: 10.3969/j.issn.0438-1157.2014.10.057.DOI:
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·Al2O3 and 11.3CaO·7Al2O3 (C11.3A7) and increase of calcium/aluminum ratio could lead to increase in the content of C11.3A7 and leaching ratio of alumina. When C/A was 1.6
the phase was almost completely C11.3A7 and the leaching rate of alumina reached a maximum. When C/A was higher than 1.6
the products were C11.3A7 and 3CaO·Al2O3
and the leaching rate of alumina decreased accordingly. The lack of CaO in C11.3A7 lattice improved the leaching reaction.