Influence of Fe_2O_3 on molten slag properties in slag splashing on nickel smelting converter

摘要

To predict the effect of Fe_2O_3 on slag splashing properties in the nickel smelting converter, Factsage software was used to calculate the proportion of the liquid phase and the viscosity for MgO-FeO-Fe_2O_3-SiO_2 melts, the melting temperature was measured using slag column deformation, and the microstructure was also observed. The results show that, when the content of Fe_2O_3 is increased from 13.79% to 24.14%, the liquid phase at 1250°C maintains a high proportion of 82.68% and the melting temperature is below 1200°C; The magnetite and hortonolite with high melting points are considerably increased, and the viscosity rises accordingly. The melting and viscous properties for the slag with high content of Fe_2O_3 were improved by adding MgO. Desired slag splashed layer was formed with the saturated Fe_2O_3 and MgO slag.