DEVELOPMENT OF AN ELECTROFUSED MgO-CaZrO_3 REFRACTORY WITH ADDITION OF HERCYNITE FOR THE CEMENT INDUSTRY

摘要

An innovative chrome-free basic refractory brick, which is based on electrofused MgO-CaZrO_3 using as ceramic bonding spinel of hercynite to improve their properties, is presented. Microstructural, physical, mechanical, and thermal properties of new refractory brick were determined. Resistance tests static and dynamic by chemical attack of clinker's raw meal powders were carried out. The results showed that thermo-mechanical properties of new brick improved when the hercynite content is increasing. Microstructural analysis revealed that the hercynite phase aided to develop a strong bond between the magnesium oxide and the calcium-zirconate. Finally, this new refractory brick exhibits good refractory properties at high temperature and excellent chemical resistance against cement raw meal.