|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Energy Technologies and Carbon Dioxide Management
||Development of Fluorine-Free Mold Flux Based on CaO-SiO2-B2O3 Slag System
||Lejun Zhou, Wanlin Wang
|On-Site Speaker (Planned)
Fluorine plays important roles on the properties of mold flux as fluxing agent; however, it tends to cause serious environment and health problems. In this paper, a new fluorine-free mold flux based on the CaO-SiO2-B2O3 slag system was developed for the continuous casting technology. Results found that the melting temperature range of F-free mold flux decreases with the addition of Na2O/Li2O and B2O3 contents; and the heat flux decreases with the increase of basicity and Na2O/Li2O, as well as the decrease of B2O3 contents. Also, the crystallization temperatures of F-free mold fluxes increased with the increase of basicity and Na2O/Li2O content. The analysis of EDS and XRD show that Ca11Si4B2O22 and Ca14Mg2(SiO4)8 are the two main precipitated crystalline phases in F-free mold fluxes, and the Ca11Si4B2O22 is common and stable crystalline phase in the designed F-free mold fluxes system that shows the potential to replace Ca4Si2O7F2 in the conventional F-containing mold fluxes.
||Planned: A print-only volume