2013•Key engineering materialsOpen access
Research on the Melting Temperature of CaO-SiO2-B2O3 Ternary Slag Systems
Li Yang, Hong Ming Wang, Xiang Zhu, Gui Rong Li
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Abstract
The melting temperature of CaO-SiO2-B2O3-(boron mud, CaF2) slag system was investigated. The slag melting temperature was measured by using the hemisphere method. The results indicate that B2O3 has a significant fluxing effect on the slag system. When 1%-11% B2O3 was employed as fluxing agent, the melting temperature of the slag changed from 1525°C to 1200°C. When the content of B2O3 is 5% and the range of basicity is 1.5~3.5, the melting temperature of the slag increases with the increase of the basicity. However, when boron mud or CaF2 was added to the slag, the melting temperature of the slags decreased with the increase of addition at a fixed B2O3 content (5%) and a fixed basicity (R=2.5). Furthermore, the melting temperature of the slag system which contains CaF2 is lower than the slag system which contains boron mud.