%0 Journal Article
%T 低钙铝酸钙熟料的物相转变和浸出性能
%A 张迪
%A 于海燕
%A 潘晓林
%A 翟玉春
%J 东北大学学报（自然科学版）
%D 2016
%R 10.12068/j.issn.1005-3026.2016.01.013
%X 摘要 以分析纯CaCO3，Al2O3和SiO2为原料，研究了nCaO/nAl▲2O▲3=1.0，w○Al2O3/wSiO▲2=3.0时物料的熔化温度以及熟料的物相组成、自粉化性能和氧化铝浸出性能.结果表明:物料熔化温度为1392℃；烧结温度为1350℃时熟料物相为CaAl2O4，Ca12Al14O33和γ-Ca2SiO4，自粉化性能和氧化铝浸出性能良好，氧化铝浸出率为93.37%；1400℃物料局部熔化，非均相的形成造成物料扩散受阻和物相分布不均匀，阻止β-Ca2SiO4向γ-Ca2SiO4转化，熟料自粉化性能变差，且有Ca2Al2SiO7生成，二者均使氧化铝浸出性能变差，氧化铝浸出率仅为74.50%；1450℃物料完全熔化，熟料自粉化性能和氧化铝浸出性能得到改善.</br>Abstract：The melting temperature， mineral phases， pulverization and alumina-leaching properties of clinkers were studied by using analytical reagent CaCO3， Al2O3 and SiO2 as raw materials. The molar ratio of CaO to Al2O3 is 1.0 and the mass ratio of Al2O3 to SiO2 is 3.0. The results showed that the melting temperature of the sample is 1392℃. The clinker sintered at 1350℃ is composed of CaAl2O4， Ca12Al14O33 and γ-Ca2SiO4， which has good pulverization property and alumina leaching rate of 93.37%. The materials melt locally and turn into heterogeneous phases at 1400℃， which blocks the elemental diffusion， results in non-homogeneous phases， and inhibits the conversion of β-Ca2SiO4 to γ-Ca2SiO4. The formation of Ca2Al2SiO7 and deterioration of pulverization property sintered at 1400℃ are the main reasons for the low alumina leaching rate of 74.50%. The clinker sintered at 1450℃ melts completely， which improves the pulverization property and the alumina leaching property of clinker.
%K 熔化温度
%K 石灰烧结
%K CaAl2O4
%K Ca12Al14O33
%K 粒度&lt
%K /br&gt
%K Key words： melting temperature lime sintering CaAl2O4 Ca12Al14O33 particle size
%U http://xuebao.neu.edu.cn/natural/CN/abstract/abstract9710.shtml