high quality of alumina bubble

1.White Fused Alumina Bubble for refractory 2.Shaped:Ball 3.High purity Alumina Bubble 4.High SiO2

Fused Alumina Bubble is produced by blowing the melt of high purity Bayer process aluminain a controlled atmosphere to produce hollow spheres. Due to its low density and extremely low thermal conductivityfused alumina bubble is ideal for high alumina based Insulating Bricks and castables.

Alumina Bubble spec:

Index Properties		Guarantee value	Typical value
Chemical composition (%)	Al2O3	98.5min	98.8
	SiO2	0.5-1.2	0.7
	Fe2O3	0.15max	0.07
	Na2O	0.4max	0.18
Packing density (g/cm3)		0.5-1.0	0.81
Damaged rate(%)		≤15	8
Refractoriness(°C)		1800
Particle size		5-0.2mm, 0.2-1mm,1-3mm,3-5mm
Test standard		GB/T3044-89
Packing		20kg/plastic bag(Dampproof)
Usage		Refractories

high quality of alumina bubble