Abstract
The effects of various additives (CaO, MgO, SiO2, CaF2 and Al2O3) in BaO-BaF2-MnO slags on the distribution ratios of phosphorus and manganese between the slags and ferro manganese have been studied at 1300°C. The dephosphorization ability of BaO-BaCl2-MnO slag is also investigated. It is found that replacement of BaO with CaO or MgO causes a decrease in the phosphate capacity and an increase in the manganese capacity, and that substitution of BaF2 with CaF2 or SiO2 results in a poor dephosphorizing ability and more losses of manganese from metal to slags. CaF2 in BaO-BaF2-MnO slags strongly reduces the BaO activity, which diminishes the beneficial action of BaO in the slags on dephosphorization. Comparing with BaO-BaCl2-MnO slags, BaO-BaF2-MnO slags give a higher dephosphorizing capacity. Critical contents of different additives in BaO-BaF2-MnO slags to achieve an effective dephosphorization have been given. Based on the fact that the relationships between optical basicity and the phosphate and manganese capacities are only valid in a restricted range of slag compositions, the relationships between the capacities and optical basicity and slag composition have been derived by considering the interaction of slag components and analyzing a host of experimental data from different authors. These relationships are expected to be useable in a wider range of slag compositions and temperatures and to predict the phosphorus and manganese contents in metal without serious error.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
