High aluminium content fire clay bricks

High aluminium content fire clay bricks    Specific 1.Made by bauxite clinker and binder through Crushing,Mixing,Shaping,Drying and high temperature Sintering. 2.Al2O3 content is 35%-80%. 3.Main mineral components are corundum and mullite phases. 4.Refractoriness is usually above 1690°C,refractoriness under load is 1300-1550°C.It is a neutral refractory material so that it enjoys excellent resistance to acid and alkali corrosion. 5.Working temperature:1350°C -1650°C. 6. Thermal expansion <0.6%  

Brand	SK-32	SK-34	SK-36	HA-60	HA-70	HA-80
Al2O3(%)	>35	>40	>50	>60	>70	>80
Fe2o3(%)	<3	<2	<2	<2	<2	<2
Refractoriness	1690	1720	1750	1770	1790	1790
refractoriness under load 0.2mpa(C)	1300	1450	1450	1450	1510	1530
Porosity(%)	19-23	19-23	19-23	19-23	19-23	19-23
Bulk density(g/cm3)	>2.15	>2.2	>2.3	>2.35	>2.4	>2.4
Cold cushing strength (mpa)	>25	>30	>40	>45	>50	>60
Thermal expansion at 1000C(%)	<0.6	<0.6	<0.6	<0.6	<0.6	<0.6