mullite refractory brick 1.Al2O3% over 80% 2.Refractoriness under load at 0.2MPa over 1700 3.competitive price mullite refractory brick apply to all kinds of klins ,furnaces . high refractoriness, excellent thermal stability and thermal shock resistance ,wear-resistant,low creep rate,high strength under high temprature,low expansion coefficient,good slag resistance. ITEMSCM-99CM-90CM-80high ...