Effect of CaF2 Addition, Temperature, Basicity and Lime Diameter on The Rate of Hot Metal Dephosphorization

To clarify the optimum dephosphorization condition with CaF2 less fluxes, laboratory experiments were performed. The effect of CaF2 addition, CaO diameter, temperature and slag basicity on the rate of hot metal dephosphorization were evaluated. Addition of small amount of CaF2 drastically increased...

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Bibliographic Details
Published inTetsu-to-Hagane Vol. 100; no. 4; pp. 509 - 515
Main Author Mukawa, Susumu
Format Journal Article
LanguageJapanese
Published The Iron and Steel Institute of Japan 2014
Subjects
CaF2
dephosphorization
fluorine
hot metal
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Summary:To clarify the optimum dephosphorization condition with CaF2 less fluxes, laboratory experiments were performed. The effect of CaF2 addition, CaO diameter, temperature and slag basicity on the rate of hot metal dephosphorization were evaluated. Addition of small amount of CaF2 drastically increased the rate of dephosphorization. This effect was attributed to the decrease in solid fraction of slag. At the conditions of the target basicity of 2.0 and using powder CaO, optimum temperature range was observed. At low temperature condition of 1270 °C, lower rate of dephosphorization was obtained. These phenomena are attributed to the loss of slag fluidity.
ISSN:0021-1575
1883-2954
DOI:10.2355/tetsutohagane.100.509