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Original scientific paper

Investigation of gaseous desiliconization in basic oxygen furnace (BOF)

W. W. Mao ; State key laboratory of advanced Metallurgy, University of Science and Technology Beijing, China
C. X. Li ; State key laboratory of advanced Metallurgy, University of Science and Technology Beijing, China
H. Lu ; State key laboratory of advanced Metallurgy, University of Science and Technology Beijing, China
H. Li ; State key laboratory of advanced Metallurgy, University of Science and Technology Beijing, China


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Abstract

In this paper, the gaseous desiliconization during slagging by limestone and lime in a Basic Oxygen Furnace (BOF) were studied by thermodynamic analysis. The results showed that part of the silicon in molten iron could volatilize into SiO in both slagging modes, but by using different methods. In the limestone slagging mode, CO2 from limestone could massively oxidize the silicon in molten iron into gaseous SiO in the hotspot zone. In the lime slagging mode, SiO can be reduced from SiO2 in slag. Both methods are dependent on the hotspot zone. The SiO amount generated from the former method is larger than the latter is.

Keywords

steel; BOF; thermodynamic analysis; gaseous desiliconization; limestone slagging

Hrčak ID:

168848

URI

https://hrcak.srce.hr/168848

Publication date:

2.1.2017.

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