东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (4): 524-528.DOI: -

• 论著 • 上一篇    下一篇

CaO-SiO_2-Al_2O_3-FeO-CaF_2-La_2O_3-Nb_2O_5-TiO_2渣系的活度计算模型

张波;姜茂发;亓捷;刘承军;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家科技支撑计划项目(2006BAB02B03,2006BAE03A04);;

Activity calculation model for a slag system consisting of CaO-SiO2- Al2O3-FeO-CaF2- La2O3-Nb2O5- TiO2

Zhang, Bo (1); Jiang, Mao-Fa (1); Qi, Jie (1); Liu, Cheng-Jun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Zhang, B.
  • About author:-
  • Supported by:
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摘要： 根据熔渣结构的分子离子共存理论,建立了CaO-SiO2-Al2O3-FeO-CaF2-La2O3-Nb2O5-TiO2八元渣系的活度计算模型.利用该活度模型,计算和分析了此渣系中铌、稀土、钛相关组元的活度变化规律.实验结果表明,模型计算结果与实际测量值能较好吻合;在本实验渣系条件下,含铌组元主要为FeO.Nb2O5,含镧组元主要为La2O3和La2O3.Al2O3,含钛组元主要为2FeO.TiO2和FeO.TiO2;随着渣中FeO质量分数的降低,含铌组元由FeO.Nb2O5转变为CaO.Nb2O5,而含钛组元主要由2FeO.TiO2和FeO.TiO2向TiO2转变;当渣中FeO质量分数较低时,...

关键词: 活度计算模型, 共存理论, 熔渣结构, 稀土铌铁复合矿, 综合利用

Abstract: Given the theory governing the molecular ionic structure of slag, a model was determined for calculating activity of an eight-element slag system consisting of CaO-SiO2- Al2O3-FeO-CaF2- La2O3-Nb2O5- TiO2. The activity change of components containing niobium, rare earth elements, or titanium was calculated and analyzed. Activity calculated by the model conformed well to experimental data. The component containing niobium were mainly FeO · Nb2O5, those containing lanthanum were mainly La2O3 and La2O3 · Al2O3, and the components containing titanium were mainly 2FeO · TiO2 and FeO · TiO2. As FeO mass fraction in the slag decreased, the niobium component changed from FeO · Nb2O5 to CaO · Nb2O5, while the titanium component changed from 2FeO · TiO2 and FeO · TiO2 to TiO2. w(CaO)/w(SiO2) was an important factor influencing activity of the components containing niobium or titanium at low levels of FeO mass fraction. Activity of 2CaO · Nb2O5 and CaO · TiO2 markedly increased with the increasing w(CaO)/w(SiO2).

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