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Compare the Fluxing Effect of Boron Sludge and CaF2 on CaO-Based Steelmaking Slag

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Abstract:

To reduce the pollution caused by employing CaF2 as fluxing agent in metallurgical flux, boron sludge is used as fluxing agent to substitute for CaF2. The melting temperatures of CaO-SiO2-Fe2O3-boron sludge system were investigated. The melting temperature of CaO-SiO2-Fe2O3-boron sludge slag system is increased with the increase of ω (CaO)/ω (SiO2) at first, and then fluctuates at about 1430°C. Moreover, the melting temperature of CaO-SiO2-Fe2O3-boron sludge system is decreased with the increase of boron sludge content at first and then increased, 7% content of boron sludge has the best fluxing effect and the melting temperature is1445°C. As a conclusion, the fluxing effect of boron sludge is close to CaF2, boron sludge may be considered to substitute for CaF2.

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Periodical:

Key Engineering Materials (Volumes 575-576)

Pages:

382-385

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.575-576.382

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Online since:

September 2013

Authors:

Hong Ming Wang, Xiang Zhu, Gui Rong Li, Li Li Yang, Cong Xiang Peng, Chang Chen Qu

Keywords:

Boron Sludge, Calcium Fluoride, Fluorine-Free Slag, Fluxing Effect, Melting Temperature

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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