东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (9): 1292-1296.DOI: 10.12068/j.issn.1005-3026.2014.09.018

• 材料与冶金 • 上一篇    下一篇

F对CaO-Al2O3-SiO2三元系铝酸钙熟料烧结和浸出性能的影响

董凯伟，于海燕，潘晓林，毕诗文   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-03-29 修回日期:2013-03-29 出版日期:2014-09-15 发布日期:2014-04-11
  • 通讯作者: 董凯伟
  • 作者简介:董凯伟(1987-)，男，河南许昌人，东北大学博士研究生;毕诗文(1940-)，男，山东荣成人，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).

Effect of F on Sintering and Leaching Properties of Calcium Aluminate in CaOAl2O3SiO2 System

DONG Kaiwei， YU Haiyan， PAN Xiaolin， BI Shiwen   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-03-29 Revised:2013-03-29 Online:2014-09-15 Published:2014-04-11
  • Contact: YU Haiyan
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摘要： 以分析纯化学试剂为原料，研究了不同F含量的CaO-Al2O3-SiO2三元系铝酸钙熟料的自粉性能、烧结规律和Al2O3的浸出性能，并通过XRF，XRD，SEM-EDS等手段探索了其作用机理.结果表明:F的加入不影响β-2CaO·SiO2向γ-2CaO·SiO2转变，熟料的自粉性良好；F对铝酸钙熟料的物相组成产生明显影响，促进2CaO·Al2O3·SiO2和11CaO·7Al2O3·CaF2相的生成，并减少12CaO·7Al2O3，CaO·Al2O3相的生成；生成的2CaO·Al2O3·SiO2进入渣中造成Al2O3浸出率降低；当F的质量分数为0~20%时，Al2O3的浸出率随着F含量的增加急剧下降，由9501%降至70%左右；铝酸钙熟料中F的质量分数应低于05%.

关键词: CaO-SiO2-Al2O3三元系, F元素, 物相组成, 氧化铝浸出, 铝酸钙

Abstract: Calcium aluminate clinker containing different contents of F in CaOAl2O3SiO2 system was obtained with analytically pure reagents as raw materials. The selfdisintegrating property， sintering and leaching properties of the clinker were studied by XRF， XRD and SEMEDS methods. The results indicate that β2CaO·SiO2 converts into γ2CaO·SiO2 normally when clinker contains F， which has little effect on the selfdisintegrating property of clinker. But F has significant effects on the phase composition of calcium aluminates. F promotes the formation of 2CaO·Al2O3·SiO2 and 11CaO·7Al2O3·CaF2 while reduces the formation of 12CaO·7Al2O3 and CaO·Al2O3. The Al2O3 leaching rate reduces with 2CaO·Al2O3·SiO2 entering into clinker. The Al2O3 leaching rate of clinker decreases from 9501% to about 70% when the F addition increases from 0 to 20%. The content of F should be less than 05% in the clinker.

Key words: CaOAl2O3SiO2 system, F, phase composition, Al2O3 leaching, calcium aluminate

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