Brown fused alumina grit

Brown fused alumina is made of high quality bauxite as main material,widely used in abrasives and refractory industry.

Brown Fused Alumina is made by high quality bauxite as main material, fusing and purifying in a pouring electric arc furnace at a temperature of over 2200 celsius degree, and made into different grain sizes through crystal, choosing, crashing, magnetic, separating, screening, washing etc. 

 

Chemical Composition(%)

Grit Size	Al2O3	TiO2	SiO2	Fe2O3	CaO	MgO
F4-F80	95.0-96.0	2.0-3.8	0.9	0.15	0.35	0.5
F90-F150	94.5-95.5
F180-F220	93.5-95.5
F200 Finer	≥92.00	1.50-3.80	≤0.45

 

Refractory sizes:

Model :0-1 1-3 3-5 5-8mm 200mesh 325mesh
Items		unit	index	typical
Chemical composition	Al2O3	%	95.00min	95.5%
	SiO2	%	0.50max	1.33%
	Fe2O3	%	3.50max	0.18%
	TiO2	%	3.50max	2.45%
	CaO	%	0.30max	0.11%
Melting point			2250
Refractoriness			1980
Bulk density		g/cm3	3.90min
Particle density		g/cm3	9.00min
Grain sizes		mm	0-1 1-3 3-5 5-8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Physical characteristics

Basic Mineral	Al2O3
Crystal Sysem	Hexagonal
Colour	Brown
True Density	3.90g/cm3 min
Mohs Hardness	9
Micro Hardness	HV1800-2200

 

 

Size Available: 

Abrasives F12-F1200,P12-P2500

Other special specification could be supplied as required.

 

Applications:

1.Coated and bonded abrasive tools

2.Lapping and polishing processes

3.Sandblasting

4.Producing mold of precision casting

5.Refractory materials including low cement castables,plastics,bricks etc.

Brown fused alumina grit