Corrosion behavior of MgO-C refractory in ferromanganese slags

Abstract

The corrosion behavior of MgO-C refractory used in oxygen blowing process in the manufacture of ferromanganese was investigated for different slag compositions. Finger Rotating Test (FRT) was introduced to observe the dependence of the corrosion behavior on various conditions: rotation speed, immersion time, slag, basicity, temperature and slag composition. As a result, the corrosion rate of MgO-C refractory increases with increasing time and rotation speed. Also, the strong corrosion of MgO-C refractory occurred when MnO is included in the slag composition. A kinetic study has been carried out with different slag contents. © 2012 ISIJ.