Corrosion mechanisms of magnesia chromite bricks in contact with a secondary steelmaking slag

摘要

In the present work a post mortem sample from an RH-degasser and a sample after a rotary slagging test at 1700 °C have been investigated. Both have been in contact with a highly basic A1_2O_3 rich slag, used for the treatment of acid resistant steel qualities. The purpose of the work is to examine the occurring corrosion mechanisms of the refractory material in contact with this steelmaking slag.The study comprises experimental methods as well as thermodynamic calculations using the software package FactSage. The use of chemical profiles together with the data from a thermal simulation enabled the investigation of local equilibrium conditions using FactSage.