EFFECT OF SLAG ON CARBON-BEARING MGO REFRACTORIES

Thermodynamic and kinetic studies of MgO reduction by carbon have been carried out. Experimental results indicate that the reduction by carb on results in a porous layer on the surface of the refractory lining, which would allow easy penetration of the slag. In a study of the diss olution of MgO and carbon bearing MgO refractories in both synthetic a nd industrial slags, a two phase layer was observed on the refractory surface, which consisted of liquid slag and a large number of MgO glob ules. The implication of this two phase layer for the reactions betwee n the slag and the refractory in industrial practice is discussed. IS/ 1342. (C) 1998 The Institute of Materials.