Influence of TiO2on the viscosity of the molten slag and the confirmation of the acid-base property on TiO2

The viscosities of high titanium containing slag with TiO(2)ranging from 23 to 43 mass%, Al(2)O(3)9 mass% and CaO/SiO(2)ranging from 0.3 to 0.7 were experimentally determined by the rotating cylinder method. Experiments were conducted in the temperature range of 1573-1873 K. The effects of TiO2, basicity, and temperature on viscosity were studied. The experimental results indicated that above the liquidus temperatures, the viscosities decrease with TiO(2)and basicity increasing. And increasing on CaO content should be more effective in depolymerizing slag structure and lowering viscosity compared to TiO(2)addition. Moreover TiO(2)behaved as a weak acid oxide in the experiment slags by XPS analysis. Based on the experimental data of CaO-SiO2-Al2O3-TiO(2)quaternary system, the activation energy of viscous flow was calculated between 115 and 141 kJ mol(-1)depending on the slag composition.

Automated summary

The experimental study investigated the viscosities of high titanium containing slag, revealing that increasing TiO2 and basicity can decrease viscosity, with increasing CaO content being more effective in reducing viscosity compared to TiO2 addition. Additionally, TiO2 was found to behave as a weak acid oxide in the experimental slags. The activation energy of viscous flow ranged between 115 and 141 kJ mol(-1) depending on the slag composition in the CaO-SiO2-Al2O3-TiO2 quaternary system.