Melting property of a slag for FeV alloy production by the electrical thermite method

SONG Ming-ming; SONG Bo; CAO Min; XIN Wen-bin; SUN Gui-lin; MAO Jing-hong

doi:10.13374/j.issn2095-9389.2015.04.006

Volume 37 Issue 4

Jul. 2021

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Article Navigation > Chinese Journal of Engineering > 2015 > 37(4): 436-440

SONG Ming-ming, SONG Bo, CAO Min, XIN Wen-bin, SUN Gui-lin, MAO Jing-hong. Melting property of a slag for FeV alloy production by the electrical thermite method[J]. Chinese Journal of Engineering, 2015, 37(4): 436-440. doi: 10.13374/j.issn2095-9389.2015.04.006

Citation:

SONG Ming-ming, SONG Bo, CAO Min, XIN Wen-bin, SUN Gui-lin, MAO Jing-hong. Melting property of a slag for FeV alloy production by the electrical thermite method[J]. Chinese Journal of Engineering, 2015, 37(4): 436-440. doi: 10.13374/j.issn2095-9389.2015.04.006

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Melting property of a slag for FeV alloy production by the electrical thermite method

doi: 10.13374/j.issn2095-9389.2015.04.006

SONG Ming-ming^1,2,
SONG Bo^{1,2
,
,},
CAO Min³,
XIN Wen-bin^1,2,
SUN Gui-lin^1,2,
MAO Jing-hong⁴

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;
3. Panzhihua Iron and Steel Research Institute, Chengdu 610000, China;
4. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2013-11-22
Available Online: 2021-07-10

Abstract

Abstract

The effect of CaO content on the liquidus of a CaO-Al₂O₃-22% MgO-1% SiO₂-2% FeO system and the influence of CaF₂ and B₂O₃ contents on the liquid content of the slag at 1700℃ were calculated using Phase Diagram and Equilib module in thermodynamic software FactSage. The starting and ending melting temperatures of the slag obtained from production were measured by differential thermal analysis. When the CaO content in the slag is controlled at 25% approximately for FeV alloy production by the electrical thermite method, the melting property of the slag is good. The effect of CaF₂ on the melting point depression of the slag is better than that of B₂O₃. Meanwhile, these two fluxes are not suitable to be used together when the mass ratio of Al₂O₃/MgO is high in the slag. Considering industrial application and environmental protection, the best addition of CaF₂ in the slag is 2% to 5%.
- ferroalloys,
- electrical thermite method,
- melting,
- thermodynamic calculations,
- optimal control