Brown Fused Alumina

Brown Corundum / Brown Fused Alumina /Brown Fused  Aluminum Oxide/ Brown Aluminum Oxide

Description:
Brown fused alumina is  fused and crystallized under high temperature from a mixture of   calcined bauxite,coke(anthracite),scrap iron  and other raw materials.
Brown fused aluminum oxide is a tough, hard material (Mohs hardness 9) with high strength, excellent wear and corrosion resistance and good thermal conductivity.

Applications :

1.For Free grinding, such as glass industry.
2.For Friction products and abrasion resistance ground
3.For Resin or ceramic bonded abrasive,such as grinding wheels,cutting off wheels.
4.For Refractory Raw material, Wear-resistant and fire-proof products.
5.For Grinding  and polishing ,such as  gringing stone, Grinding block, flap disc.
6.For Coated abrasives,such as abrasive paper,abrasive cloth,abrasive belt.
7.For Producing mold of precision casting and Grinding, lapping and polishing media.

Chemical Properties:

Purpose	Specification		Chemical composition(%)				Magnetic material ≤
			Al2O3(≥)	Fe2O3(≤)	SiO2≤	TiO2≤
For abrasive	F grit	4#-80#	95.0	0.3	1.5	3.0	0.05
		90#-150#	94.0				0.03
		180#-240#	93.0			3.5	0.02
	P grit	8#-80#	95.0	0.2	1.2	3.0	0.05
		100#-150#	94.0				0.03
		180#-220#	93.0	0.3	1.5	3.5	0.02
	Micro Powder	W0.5-W63 F320-F1500	92.5	0.5	1.8	4.0
For refractory	Size for Sand	0-1mm 1-3mm 3-5mm 5-8mm 8-12mm	95.5	0.3	1.5 (1.0 from Tilting Furnace)	3.0
		0-3mm 0-5mm 0-10mm 0-25mm	95.0	0.3	1.5	3.0
	Fine powder	140F 200F 325F	94.5	0.5	1.5	3.5

We also can provide grain size as customer's special requiremen.

Physical Properties:

Item	Index
Colour	Dark brown(Deep blue after calcination)
Crystal form	Trigonal crystal
Hardness(MO)	≥9.0
Melting point(°c)	2250
Maximum service temperature°c	1900
True density(g/cm3)	≥3.9
Coefficient of linear expansion	7-9