Hollow Alumina Spherere Refractory Bricks

Hollow Alumina Sphere Refractory Bricks 1,high temperature resistance 2.low thermal conductivity 3. good thermal insulation

  

 Hollow Alumina Sphere Refractory Bricks  

Scope of application

They are widely used in inner linings of various non-contacted melt high temperature kiln and thermal insulating layers of high temperature kilns.

Physical and Chemical Indexes of Hollow Alumina Sphere Bricks
Name / Indexes/ Item		MLQ-1.5	LQ-1.2	LQ-1.5	LQ-1.7
Chemical composition	Al2O3 % ≥	84	98.5	98.5	98.5
	Fe2O3 % ≤	0.8	0.3	0.3	0.3
	SiO2 % ≤	15	1.0	1.0	1.0
Bulk density g/m3≤		1.5	1.2	1.5	1.7
Compressive strength at normal temperature MPa≥		16	3	12	15
Porosity % ≥		58	62	60	58
Soften point at 0.1MPa KD°C≥		1650	1650	1700	1700
Fire resistant (°C)≥		1800	1800	1800	1800
Thermal conductivity Hot side 1000°CW/m.k≤		1.2	0.95	1.05	1.15

Hollow Alumina Spherere Refractory Bricks