摘要:
The corrosion resistance behavior of a highly dispersed MgO-MgAl
2O
4-ZrO
2 composite refractory material is examined by testing with high-basicity and low-basicity RH (Ruhrstahl-Hereaeus) slags. The composite material exhibits greater resistance to the RH slags than the traditional MgO-Cr
2O
3 composite, MgO-ZrO
2 composite, and MgO-MgAl
2O
4-ZrO
2 composite. On the basis of the microstructural analysis and mechanisms calculations, the corrosion resistance behavior of the MgO-MgAl
2O
4-ZrO
2 composite is attributable to its highly dispersed structure, which helps protect the high activity of ZrO
2. When in contact with the slag, ZrO
2 reacts with CaO to form the stable phase CaZrO
3, which protects MgAl
2O
4 against corrosion, thereby enhancing the corrosion resistance of the composite.