Experimental study on the melting temperature characteristic of the CaO-FeO-Al2O3-SiO2 slag system

XING Wei; WU Long; LI Shi-qi; YAO Li; LIU Run-zao

doi:10.13374/j.issn1001-053x.2014.05.006

Volume 36 Issue 5

Jul. 2021

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XING Wei, WU Long, LI Shi-qi, YAO Li, LIU Run-zao. Experimental study on the melting temperature characteristic of the CaO-FeO-Al2O3-SiO2 slag system[J]. Chinese Journal of Engineering, 2014, 36(5): 603-607. doi: 10.13374/j.issn1001-053x.2014.05.006

Citation:

XING Wei, WU Long, LI Shi-qi, YAO Li, LIU Run-zao. Experimental study on the melting temperature characteristic of the CaO-FeO-Al₂O₃-SiO₂ slag system[J]. Chinese Journal of Engineering, 2014, 36(5): 603-607. doi: 10.13374/j.issn1001-053x.2014.05.006

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Experimental study on the melting temperature characteristic of the CaO-FeO-Al₂O₃-SiO₂ slag system

doi: 10.13374/j.issn1001-053x.2014.05.006

XING Wei¹,
WU Long^1,2,
LI Shi-qi¹,
YAO Li^1,3,
LIU Run-zao^{1
,
,}

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Central Research Institute of Building and Construction, MCC Group, Co., Ltd., Beijing 100088, China;
3. Tangshan Iron and Steel Group Co. Ltd., Tangshan 063016, China

Received Date: 2013-03-03
Available Online: 2021-07-10

Abstract

Abstract

Theoretical calculations by FactSage software and melting experiments were performed to systematically study the melting temperature characteristic of a CaO-FeO-Al₂O₃-SiO₂ fluoride-free slag system used for hot metal dephosphorization pretreatment. Three influence factors of the melting temperature of the slag were researched which were the slag's binary basicity, the mass fractions of Al₂O₃ and FeO. The results show that the mass fraction of FeO has the greatest impact on the melting temperature of the slag among three factors. The obtained best proportion of the slag is the binary basicity of 5.5, 10% Al₂O₃ and 45% FeO. Under the experimental conditions, the melting temperature characteristic of the optimal slag can meet requirements for hot metal dephosphorization pretreatment.
- ironmaking,
- dephosphorization,
- slags,
- melting point