High Alumina Bricks for EAF roof

High Alumina Bricks for EAF Roof Its produced with selected bauxite chamotte by advanced process and strict quality control. The main mineral components are corundum and mullite phases. It features excellent high temperature mechanics and chemical corrosion resistance. Main Properties Item IndexCode DL-65DL-75DL-80Al2O3 min, % 65 70 80 Refractoriness , min 17901790 1790 Refractoriness under load (0.2MPa) , min 1520 1540 1560 Linear change after reheating (1550, 2h) % 0 -0.30 -0.30 -0.2Apparent porosity max, % Roof brick 2119 19 Skew angle brick 222121Cold crushing strength Mpa, min 63.8 80.5 90.5