Brown corundum

High hardness, strength, impact resistance, high temperature resistant, anti-oxidation, corrosion resistance, low creep Technology: Brown fused alumina use high-quality bauxite as main raw material, it is made in different particle size after purification, impurity cleaning, crystallization, sorting, crushing, magnetic separation in temperature above 2200Product performance: High hardness, strength, impact resistance, high temperature resistant, anti-oxidation, corrosion resistance, low creep.Application: Resin ceramic abrasive, sand blasting, grinding and polishing, and is widely used in anti-wear runways, high-temperature coating matrix and metallurgy, chemical industry, and other high-level furnace refractories.Physical and chemical indicators of corundum

Use	Specifications		The main chemical components%				Magnetic materials%
			Al2O3	Fe2O3	SiO2	TiO2
Abrasives	F	4#80#	≥95.0	≤0.25	≤1.5	≤2.3	≤0.05
		90#150#	≥95.0				≤0.03
		180#240#	≥94.0	≤0.25	≤1.5	≤2.3	≤0.02
	P	8#80#	≥95.0	≤0.25	≤1.2	≤2.5	≤0.05
		100#150#	≥94.0				≤0.03
		180#220#	≥93.0	≤0.3	≤1.5	≤2.5	≤0.02
	W	1#-63#	≥92.5	≤0.4	≤1.8	≤3
Refractories	Sand paragraph	0-1mm1-3mm3-5mm5-8mm8-12mm	≥95	≤0.25	≤1.5	≤2.3
		25-0mm10-0mm50-0mm30-0mm	≥95	≤0.25	≤1.5	≤2.3
	Powder	180#-0200#-0320#-0	≥94.5≥93.5	≤0.3	≤1.5	≤3

Note: F for the consolidation abrasive and sand blasting  P for Coated Abrasives  W for the powder, W40,that is, 320 # 

The physical properties of corundum
Item	Indicators
Color	Dark brown (dark blue after calcining)
Crystal shape	Trigonal system
Hardness (Mo's)	≥9.0
Melting Point ()	2250
The maximum temperature ()	1900
True Density (g/cm3)	≥3. 90
Linear expansion coefficient (0-1600 )	79

Brown corundum