Research on Properties of Low Fluorine CaF2-CaO-Al2O3-MgO-SiO2 Refining Slag
SHI Guan-yong ZHANG Ting-an NIU Li-ping DOU Zhi-he
School of Materials and Metallurgy, Northeastern University School of Materials & Metallurgy，Northeastern University Shenyang School of Materials & Metallurgy，Northeastern University Shenyang Key Laboratory for Ecological Utilization of Multimetallic Mineral (Ministry of Education), Northeastern University
Abstract：Low fluorine CaF2-CaO-Al2O3-MgO-SiO2 slag system was used as refining slag for preparation of Cu-Cr alloy. Its viscosity, density, surface tension and melting temperature were studied. The results indicated that the melting temperature of the slag was between 1336~1402℃. The density and surface tension of CaF2-CaO-Al2O3-MgO-SiO2 slag decreased with increasing of temperature, adding of CaF2 and MgO could decrease its density and surface tension. Its viscosity decreased with increasing of MgO and CaF2 content, and achieved the minimum value when MgO content was 6%, and increased when MgO content up to 9% with 10% and 15% CaF2 content. The slag had lower surface tension and better fluidity, so the refining efficiency with it was very good.
2011, Vol. 11 
