Abstract
During the blast furnace smelting process of titanium-bearing ores, TiC0.3N0.7 was proved to be formed on the protective layer of the hearth, which greatly affects the fluidity of blast furnace slag and the successful separation of slag and metal. The present study reported an experimental investigation into the effect of solid particles on the viscosity of molten slags by the rotating-cylinder method. The viscosities of CaO–MgO–Al2O3–SiO2 melts containing different volume fractions of TiC0.3N0.7 particles were measured at different temperatures. It was found that viscosity of TiC0.3N0.7-containing melt increased with volume fraction of solid particles, but decreased as increasing the rotation speed. Furthermore, the Arrhenius law was obeyed for both the melts with and without TiC0.3N0.7 particles. It was also found that the temperature has little influence on the relative viscosity of TiC0.3N0.7 bearing slag. By comparison, TiC0.3N0.7 can increase the viscosity of suspension system more than TiN, but less than TiC.
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