Effect of TiO2 on the Slag Properties for CaO-SiO2-MgO-Al2O3-TiO2 System

Abstract

In the present work, the slag properties were investigated for CaO-SiO₂-MgO-Al₂O₃-TiO₂ system. Effects of TiO₂ and temperature on viscosity, melting characteristics and surface tension were analyzed. The results showed that temperature decreases the viscosity within the range studied and all the viscosity values are less than 0.4 Pa.s at high temperature. The viscosity of the slag fluctuates within 0.2 Pa.s at a given temperature above 1350 ºC. However, the viscosity of the slag containing 20 % TiO₂ increases sharply up to even more than 2.9 pa.s at lower temperature (<1350 ºC). The liquidus temperature increases gradually then decreases slightly with increasing titania and all of them are lower than 1300 ºC. Surface tension follows an oppsite trend at a given temperature. It reaches a maximum value when tiatania content in slag is 18 %. The temperature seems to have no obvious effect on surface tension.