Effect of fluxing agent on the properties of CaO-Al<sub>2</sub>O<sub>3</sub> based mold flux

Li Chen; Qi Jie; Liu Chengjun; Jiang Maofa

doi:10.7513/j.issn.1004-7638.2021.04.021

Volume 42 Issue 4

Aug. 2021

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Li Chen, Qi Jie, Liu Chengjun, Jiang Maofa. Effect of fluxing agent on the properties of CaO-Al2O3 based mold flux[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 124-130. doi: 10.7513/j.issn.1004-7638.2021.04.021

Citation:

Li Chen, Qi Jie, Liu Chengjun, Jiang Maofa. Effect of fluxing agent on the properties of CaO-Al₂O₃ based mold flux[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 124-130. doi: 10.7513/j.issn.1004-7638.2021.04.021

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Effect of fluxing agent on the properties of CaO-Al₂O₃ based mold flux

doi: 10.7513/j.issn.1004-7638.2021.04.021

Li Chen^{1, 2
,},
Qi Jie^{1, 2},
Liu Chengjun^{1, 2
,
,},
Jiang Maofa^{1, 2}

1.
Key Laboratory of Ecological Metallurgy of Multimetallic Mineral (Ministry Education), Shenyang 110819, Liaoning, China
2.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

Received Date: 2020-12-29
Publish Date: 2021-08-10

Abstract

Abstract

In order to address the problems of serious slag strips and breakout alarms in the process of high-aluminum steel continuous casting using calcium-aluminum-based mold flux, the comprehensive effect of B₂O₃ and CaF₂ on the melting temperature, viscosity and crystalline properties were investigated. The results showed that as the mass fraction of CaF₂ replaced by B₂O₃ increased, the melting temperature and breaking temperature of the mold flux decreased, and the viscosity showed an increasing trend. Moreover, the mold flux had stronger crystallization ability with high content of CaF₂, leading to the precipitation of Ca₁₂Al₁₄O₃₂F₂ at a high temperature. As the mass fraction of CaF₂ replaced by B₂O₃ increases, the crystallization ability had been obviously inhibited, and the crystalline phases changes as follows: Ca₁₂Al₁₄O₃₂F₂ → 2CaO·Al₂O₃·SiO₂ → a single liquid phase.When B₂O₃ replaces CaF₂ with a mass fraction of 10%, the crystallization performance of the mold flux was effectively suppressed, which could effectively reduce the sticking breakout alarm and meet the casting requirements of high-aluminum steel.
- high-aluminum steel,
- continuous casting mold flux,
- viscosity,
- crystallization,
- fluxing agent

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References(12)

References

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