东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (1): 43-47.DOI: 10.12068/j.issn.1005-3026.2015.01.010

• 材料与冶金 • 上一篇    下一篇

含钛高炉渣活度模型的建立及热力学分析

石俊杰， 李杰， 孙丽枫， 姜茂发   

  1. (东北大学 多金属共生矿生态化冶金教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2013-12-02 修回日期:2013-12-02 出版日期:2015-01-15 发布日期:2014-11-07
  • 通讯作者: 石俊杰
  • 作者简介:石俊杰(1988-)，男，湖北随州人，东北大学博士研究生； 姜茂发(1955-)，男，山东栖霞人，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(51104039)； 辽宁省教育厅科研项目(20L2013114)； 辽宁省科学技术计划项目(2012221013)； 中央高校基本科研业务费专项资金资助项目(N130602002).

The Activity Model and Thermodynamic Analysis for Ti-Bearing Blast Furnace Slag

SHI Jun-jie， LI Jie， SUN Li-feng， JIANG Mao-fa   

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores，Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2013-12-02 Revised:2013-12-02 Online:2015-01-15 Published:2014-11-07
  • Contact: SUN Li-feng
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摘要： 根据分子离子共存理论，建立了CaO-SiO2-MgO-Al2O3-TiO2含钛高炉渣活度模型，模型计算结果与实验测定结果吻合较好.利用该模型并结合相图计算分析了碱度和w(TiO2)对含钛高炉渣主要组元活度的影响.结果表明，含钛高炉渣中钛的主要赋存相是CaO·TiO2，1500℃时典型含钛高炉渣中CaO·TiO2的活度为0.18.随着碱度和w(TiO2)增加，CaO·TiO2活度先增后减.当碱度区间在1.08~3.08，w(TiO2)在26%~43%的条件下，有利于CaO·TiO2活度的增加，促进钛组分在钙钛矿中富集.CaO·TiO2活度最大值所需碱度随TiO2含量的增加而增加，当含钛高炉渣中w(TiO2)为20%~28%时碱度为1.34~1.63，对促进钛在钙钛矿中的富集是有利的.

关键词: 活度模型, 分子离子共存理论, 热力学, 含钛高炉渣, 综合利用

Abstract: Based on the coexistence theory of molecules and ions in slags， an activity model of CaO-SiO2-MgO-Al2O3-TiO2 was constructed， and the calculated result was in good agreement with experimental data. Combined with the phase diagram， the activity model was used to calculate the influences of slag basicity and w(TiO2) on the activities of the main components in slag. The calculated result indicates that the component containing TiO2 is mainly CaO·TiO2， and the activity of CaO·TiO2 is 0.18 at 1500°C. The activity of CaO·TiO2 increases first and then decreases with the increase of w(TiO2) and basicity. It is better for the increase of activity of CaO·TiO2 when the basicity is between 1.08 and 3.08 and w(TiO2) is between 26% and 43%， which is benefit for the enrichment of titania as CaO·TiO2.The corresponding basicity for maximum activity of CaO·TiO2 increases with the increase of w(TiO2)， and the basicity is between 1.34 and 1.63 when w(TiO2) is between 20% and 28%， while the maximum enrichment of titania as CaO·TiO2 can be obtained.

Key words: activity model, the coexistence theory of molecule and ion, thermodynamics, Ti-bearing blast furnace slags, comprehensive utilization

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