CaO-TiO2-Fe2O3三元系中Ca3TiFe2O8的生成機理

項南; 郭玉峰; 郭興敏

doi:10.13374/j.issn2095-9389.2017.11.009

CaO-TiO₂-Fe₂O₃三元系中Ca₃TiFe₂O₈的生成機理

doi: 10.13374/j.issn2095-9389.2017.11.009

項南^1,2,
郭玉峰^1,2,
郭興敏^1,2, ,

1) 北京科技大學鋼鐵冶金新技術國家重點實驗室, 北京 100083
2) 北京科技大學冶金與生態工程學院, 北京 100083

基金項目:

國家自然科學基金資助項目(U1460201,51374017)

詳細信息

中圖分類號: TF046
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出版歷程
- 收稿日期: 2016-12-01

Formation mechanism of Ca₃TiFe₂O₈ in a CaO-TiO₂ -Fe₂O₃ system

XIANG Nan^1,2,
GUO Yu-feng^1,2,
GUO Xing-min^{1,2
, ,}

1) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 釩鈦磁鐵礦是燒結礦重要的原料之一,Ca₃TiFe₂O₈作為釩鈦燒結礦中礦物被發現之后,其生成機理尚不明確.本文采用X射線衍射分析、元素能譜分析和TG-DSC分析相結合的方法,研究了Ca₃TiFe₂O₈的生成機理以及不同溫度、CaO與TiO₂含量下Ca₃TiFe₂O₈的生成規律.實驗結果表明,Ca₃TiFe₂O₈由Ca₂ Fe₂O₅和CaTiO₃反應生成,即CaO和Fe₂O₃反應生成Ca₂ Fe₂O₅;其后,與CaTiO₃反應生成Ca₃TiFe₂O₈.反應時間越長,Ca₃TiFe₂O₈的生成量越大,但反應溫度對Ca₃TiFe₂O₈生成的影響并不明顯.另外,還發現CaO含量越高,Ca₃TiFe₂O₈越易于生成,而且等摩爾Fe₂O₃和CaO下只要存在TiO₂,就會有Ca₃TiFe₂O₈生成.
- 釩鈦磁鐵礦 /
- 燒結 /
- Ca₃TiFe₂O₈ /
- 生成機理 /
- 生成規律
Abstract: Vanadium-titanium magnetite is one of the important raw materials for iron making in a blast furnace. Ca₃TiFe₂O₈, which is a mineral of vanadium-titanium sinter, was discovered to form during the process; however, its formation mechanism is not clear. In this work, an X-ray diffraction analysis, an elemental spectroscopy, and a TG-DSC were employed to investigate the formation mechanism of Ca₃TiFe₂O₈ and the formation law at different temperatures and at CaO and TiO₂ contents in the CaO-TiO₂ -Fe₂O₃ system. The formation mechanism of Ca₃TiFe₂O₈ is clarified:CaO reacts with Fe₂O₃ to form Ca₂ Fe₂O₅, and then continues to react with the CaTiO₃ to form Ca₃TiFe₂O₈. The longer the reaction time, the greater is the amount of Ca₃TiFe₂O₈ formed. However, the effect of temperature on the formation of Ca₃TiFe₂O₈ is not obvious. It is found that high CaO content contributes to the formation of Ca₃TiFe₂O₈. Further, so long as TiO₂ is present, Ca₃TiFe₂O₈ is formed under the condition of equal molar concentration Fe₂O₃ and CaO.
- vanadium and titanium magnetite /
- sintering /
- Ca₃TiFe₂O₈ /
- formation mechanism /
- formation law

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參考文獻(4)

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