东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (1): 59-63.DOI: 10.12068/j.issn.1005-3026.2016.01.013

• 材料与冶金 • 上一篇    下一篇

低钙铝酸钙熟料的物相转变和浸出性能

张迪1,2， 于海燕1， 潘晓林1， 翟玉春1   

  1. (1.东北大学 材料与冶金学院， 辽宁 沈阳110819; 2.河北科技大学 材料科学与工程学院， 河北 石家庄 050018)
  • 收稿日期:2014-11-11 修回日期:2014-11-11 出版日期:2016-01-15 发布日期:2016-01-08
  • 通讯作者: 张迪
  • 作者简介:张迪(1985-)，男，河北衡水人，东北大学博士研究生； 翟玉春(1946-)，男，辽宁鞍山人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51174054，51374065).

Phase Transformation and Leaching Property of Low-Lime Calcium Aluminate Clinker

ZHANG Di1,2， YU Hai-yan1， PAN Xiao-lin1， ZHAI Yu-chun1   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. School of Materials Science and Engineering， Hebei University of Science and Technology， Shijiazhuang 050018， China.
  • Received:2014-11-11 Revised:2014-11-11 Online:2016-01-15 Published:2016-01-08
  • Contact: PAN Xiao-lin
  • About author:-
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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.

关键词: 熔化温度, 石灰烧结, CaAl2O4, Ca12Al14O33, 粒度

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.

Key words: melting temperature, lime sintering, CaAl2O4, Ca12Al14O33, particle size

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