High Alumina Refractory Bricks High temperature resistance Factory Supply

High alumina brick is a kind of refractories, the main composition of this refractory brick is Al2O3.Aluminum trioxide (Al2O3) containing more than 48% aluminum silicate refractories.

Laurel high alumina bricks are 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.

Item	HA60	HA70	HA75	HA80
AL2O3(%)	≥60	≥70	≥75	≥80
SIO2(%)	32	22	20	≥18
Fe2O3(%)	≤2.5	≤2.0	≤1.8	≤1.8
Refractoriness °C	≥1750	≥1770	≥1780	≥1790
Bulk density,g/cm3	2.35-2.4	2.45-2.5	2.5-2.55	2.55-2.6
Softening temperature under load	≥1450	≥1510	≥1520	≥1530
Apparent porosity,%	≤24	≤23	≤22	≤21
Cold Crushing strength Mpa	≥45	≥50	≥54	≥60