●Transition Zone: As there is no protection by clinker coating, the refractory used at transition zone must have excellent resistance to thermal shock and mechanical abrasion. The practice shows that mag-spinel and mag-galaxite brick are the most and stable one. The silicon carbide also performs well.
● Burning Zone: Refractory will be damaged in very short period of time without clinker coating protection. The refractory used must have clinker coating property besides other properties such as excellent thermal shock resistance, mechanical intensity and resistance to overheat damage. Mag-chrome brick were the best choice. Furthermore, mag-alumina spinel, mag-hercynite and mag-galaxite can be mature replacement considering the chrome contamination problem
Nature comparison of the bricks
●Clinker Coating Ability
●Hot Mechanical Flexibility
●Refractoriness under Load