二次精煉渣成分對渣中MgO飽和度的影響

顧超; 王敏; 蔡小鋒; 甘鵬

doi:10.13374/j.issn2095-9389.2018.s1.011

二次精煉渣成分對渣中MgO飽和度的影響

doi: 10.13374/j.issn2095-9389.2018.s1.011

北京科技大學鋼鐵冶金新技術國家重點實驗室

基金項目:

國家自然科學基金資助項目 (51574019)

詳細信息

通訊作者:
王敏, E-mail:worldmind@163.com

中圖分類號: TF769
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- 文章訪問數: 7
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出版歷程
- 收稿日期: 2018-02-15
- 網絡出版日期: 2023-07-18

Effect of the composition on MgO saturability in secondary metallurgical slag

State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing

摘要

摘要: 在二次精煉過程中, 流動性適中且MgO飽和的精煉渣有助于渣鋼傳質, 并可以在一定程度上延長耐火材料的壽命.本研究使用熱力學計算軟件Fact Sage及熱態平衡實驗對酸性精煉渣Ca O-Si O₂-Al₂O₃-MgO四元系中MgO飽和度進行了研究.結果表明:當酸性精煉渣堿度為0.5¹.8時, 渣中MgO飽和度在2%³9%范圍內波動.當堿度增加時, MgO飽和度明顯降低.隨渣中Al₂O₃含量增加, 在MgO飽和相方鎂石相 (MgO) 和鎂橄欖石相 (2MgO·Si O₂) 中MgO飽和度逐漸增加, 在尖晶石相 (MgO·Al₂O₃) 中逐漸減少.渣中Si O₂含量對鈣硅酸鹽中MgO的飽和度有重要影響.此外, 當溫度升高時, MgO飽和度逐漸增加.
- MgO飽和度 /
- FactSage /
- 熱力學計算 /
- 精煉渣
Abstract: A predominantly liquid and MgO saturated slag is preferred in secondary metallurgical processes.It contributes to the mass transfer in molten steel and the extension of the refractory life.In the present study, the saturability of Mg O in quaternary Ca O-Si O₂-Al₂O₃-MgO system in secondary metallurgical slag with low basicity was investigated by commercial thermodynamic software and laboratory experiments.The result shows that in the basicity (Ca O/Si O₂) range of 0.5-1.8, the saturability of MgO fluctuates between2%and 39%and decreases with the increase of basicity.The saturability of MgO increases in the MgO saturated phase periclase (MgO) and forsterite (2MgO·Si O₂) and decreases in the MgO saturated phase spinel (MgO·Al₂O₃) with an increase in Al₂O₃content.Si O₂content has a great effect on the saturability of MgO in lime-silicate slag.Besides, the MgO saturability increases with an increase in temperature.
- MgO saturability /
- FactSage /
- thermodynamic calculations /
- refining slag

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