Effect of different parameters on wettability of graphite by CaO-SiO2-Al2O3-FeO-MgO slag

Effect of different factors such as slag chemistry, temperature and graphit e type on wettability of graphite by CaO-SiO2- Al2O3-FeO-MgO slags were inv estigated by using the sessile drop technique where wettability was determi ned by direct measurement of the interfacial contact angles. Interaction ef fects of these parameters were also determined by using a simple statistica l procedure. SiO2, dill not affect wettability. MgO had a detrimental effec t, whereas, FeO content. temperature and graphite with ash content upto 0.3 % had beneficial effects on wettability. The most significant effect was re alised from FeO content mostly towards the higher value of 9.16%. Interacti on effects were not so significant. The energy released on the interface du e to the reduction reaction of FeO by carbon had a direct correlation with decrease in surface tension of FeO containing slags which in turn improved wettability.