MgO含量對CaO-Al2O3-MgO-FexO-SiO2-K2O系熔體性質的影響

候朋濤; 王麗君; 劉仕元; 張建坤; 周國治

doi:10.13374/j.issn2095-9389.2017.02.008

MgO含量對CaO-Al₂O₃-MgO-Fe_xO-SiO₂-K₂O系熔體性質的影響

doi: 10.13374/j.issn2095-9389.2017.02.008

候朋濤¹,
王麗君^2,3, ,,
劉仕元²,
張建坤⁴,
周國治^2,3

1) 北京科技大學冶金與生態工程學院, 北京 100083
2) 北京科技大學鋼鐵共性技術協同創新中心, 北京 100083
3) 北京科技大學鋼鐵冶金新技術國家重點實驗, 北京 100083
4) 謙比希銅冶煉有限公司, 基特韋 23558

基金項目:

中國博士后科學基金委資助項目（2014M560046）；國家自然科學基金面上資助項目（51374020）

詳細信息

中圖分類號: TF801.3
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出版歷程
- 收稿日期: 2016-06-08

Influence of MgO content on the thermo-physical properties of CaO-Al₂O₃-MgO-Fe_xO-SiO₂-K₂O slags

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
3) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
4) Chambishi Copper Smelter Limited, Kitwe 23558, Zambia

摘要

摘要: 研究了MgO含量變化對CaO-Al₂O₃-MgO-Fe_xO-SiO₂-K₂O系熔體黏度和熔化特性的影響，結合X射線衍射和掃描電鏡分析熔渣冷卻過程中的物相析出，并通過FactSage軟件計算了該體系的黏度、熔點和冷卻過程中析出相的含量與溫度的關系，并與實驗結果進行了對比和分析.結果表明，MgO含量的增多會造成熔渣熔化溫度的升高，黏度隨溫度變化時會出現黏度驟增的轉折點，高于轉折點溫度時，熔渣黏度隨MgO含量變化不大，同時該轉折點溫度隨MgO含量的增加而升高.在熔渣冷卻過程中析出相主要為固溶的橄欖石相和Fe₃O₄尖晶石相，MgO含量的增大可以促進橄欖石相的析出，熔體黏度驟增主要由于橄欖石相的析出造成的.
- 黏度 /
- 熔化溫度 /
- 氧化鎂 /
- 析出相
Abstract: The effects of MgO content on the viscosity and melting behaviors of CaO-Al₂O₃-MgO-Fe_xO-SiO₂-K₂O slags were studied. The slag samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to identify precipitated phases during the cooling process. Meanwhile, theoretical calculations on the viscosities, solidus/liquidus temperatures as well as quantities of various precipitated phases from the slag system were also carried out by using the FactSage software, which were compared with the experimental results. The results indicate that the addition of MgO in slag could cause the increase of melting temperature. The relation between viscosities and temperature presents a breakpoint where the viscosity has a rapid rise, and above this transition temperature, MgO content has little effect on the viscosity. The transition temperature increases with the increasing of MgO content. In the process of slag cooling, the crystalline phases are mainly composed of olivine and spinel. From the calculation results, it could be found that the addition of MgO enhances the precipitates of olivine, which makes the viscosity increase suddenly.
- viscosity /
- melting temperature /
- magnesium oxide /
- precipitated phase

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參考文獻(13)

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