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| Mathematical model for design of optimized multi component slag for electroslag remelting |
| Shi-jian Li1, Guo-guang Cheng1, Yu Huang1, Wei-xing Dai1, Zhi-qi Miao1 |
| 1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Slag is the heart of electroslag remelting (ESR) process. A new mathematical model to design the optimized slag for ESR was developed based on slag–metal equilibrium theory, ion and molecule coexistence theory and modified Butler’s equation. It was assumed that an overall thermodynamic equilibrium did exist at electrode tip–slag interface. With this model, the equilibrium slag and its surface tension could be obtained quantitatively when the initial compositions of consumable electrode were given. An industrial experiment with four types of slags was carried out in a special steel plant in China. The variation of Al, Si and Mn corresponded well with the deviation of corresponding oxide from equilibrium, reflecting the reasonability of the model. Besides that, the effects of Al in electrode as well as CaO, CaF2 and MgO in slag on the equilibrium slag, dissolved oxygen and surface tension were discussed in detail.
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| Cite this article: |
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Shi-jian Li,Guo-guang Cheng,Yu Huang, et al. Mathematical model for design of optimized multi component slag for electroslag remelting[J]. Journal of Iron and Steel Research International, 2020, 27(4): 380-391.
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2020, Vol. 27 
