Initial Wetting and Spreading Phenomena of a CaO-SiO2 Liquid Slag on MgO Substrates

Initial wetting phenomena and spreading property of CaO-SiO2 slag on MgO single and poly-crystal refractory substrates are investigated using sessile drop technique and a high-speed camera (1 500 frame's). By observing and analyzing the spreading rate, change of the contact angle, and the composition change in slag and refractory, we found that the initial wetting is non-reactive and controlled by viscous friction.This work was supported by the R&D Center for Valuable Recycling (Global-Top Environmental Technology Development Program) funded by the Ministry of Environment (Project No. :11-C22-ID)