Product Details

White Fused Alumina

White fused alumina with high quality alumina oxide powder as raw materials, white fused alumina is produced by fusing and extracting from crystallization. It is featured by high purity, self−sharpening, and acid−alkali and corrosion resistance, temperature tolerance. Compared with brown fused alumina, its thermal stability properties is slightly higher and toughness is slightly lower. The abrasive tools made by it are applicable for grinding high carbon copper and high−speed steel.

1.For Abrasive: This kind of white fused alumina electrically fused in arc furnace with high grade processed alumina as raw material. It has higher hardness and slight lower toughness comparing with brown fused alumina. It is also characterized by its high purity, ability of self-sharpening, better cutting, less heat emit, higher efficiency, acid and alkali resistance, good thermal stability. As the abrasive materials, it is suitable for grinding high-speed, high carbon steel, as loose grains, it widely used for bonded and coated abrasives , polishing, precision casting and so on.

Purpose	Specification		Chemical composition( % )				Magnetic material content(%)
			Al2O3	Na2O	SiO2	CaO
For abrasive	F	12#-80#	99.0Min	0.5Max	-	0.4 Max	0.003 Max
		90#-150#	98.5Min	0.6 Max			0.003 Max
		180#-240#	98.2Min	0.7 Max	-	0.4 Max	0.002 Max

Item	Specification
Colour	white
Crystal System	trigonal system
Mohs Hardness	max10
Melting Temperature(°c)	2250
Refractory Temperature(°c)	1900
True Density	max3. 50

2.For Refractory: Comparing with brown fused alumina. It is also characterized by its high purity, acid and alkali resistance, good thermal stability. It’s the high grade refractory materials.

Purpose	Specification		Chemical composition(%)				Magnetic material content(%)
Purpose	Specification		Al₂O₃	Na₂O	SiO₂	CaO	Magnetic material content(%)
For refractory	Size sand	0-1mm 1-3mm 3-5mm 5-8mm 8-12mm	99.0Min	0.5 Max	—	0.4 Max	0.003 Max
For refractory	Fine powder	180#-0 240#-0 320#-0	98.5Min	0.5 Max	0.3 Max	0.5 Max	0.001 Max

3.for Sandblasting: White fused alumina for sandblasting abrasive is processed by high quality corundum from Rui Shi Abrasive Plant as raw material and utilized by unique advanced technology. It is characterized by short grinding time, high efficiency, good returns , low price and so on. In particular, its advantages such as high hardness, big specific gravity, good chemical stability and unique self−sharpening , it becomes the first choice for the sandblasting technics, meanwhile, it is also the ideal material for sandblasting and derusting, workpiece cleaning, and polishing.

Purpose	Specification		Chemical composition(%)				Magnetic material content(%)
			Al2O3	Na2O	SiO2	CaO
For sandblasting	F	12#-80#	99.0Min	0.5Max	-	0.4 Max	0.003 Max
		90#-150#	98.5Min	0.6 Max			0.003 Max
		180#-240#	98.2Min	0.7 Max	-	0.4 Max	0.002 Max

4.for Precision Casting: White fused alumina is the high grade refractory raw material, main crystal system is α− Al2O3, white color. It is characterized by high volume density, low apparent porosity, stable volume and thermal stability performance and so on, it is can be used for shell making material of heavy steel casting, especially the alloy casting, core sand, coating material and melt film precision casting, and it is also can be used as half precision blasting and precision blasting material for hardened steel, alloy steel and so on.

Purpose	Specification	Chemical and physical composition (%)
Purpose	Specification	Al₂O₃	Na₂O	SiO₂	Fe₂O₃	Apparent Porosity (%)	Volume Density (g/cm³)
Precision casting	50# –80#	≥99	≤0.5	≤0.2	≤0.15	≤8.0	≥3.45
	70# –140#	≥98.5	≤0.5	≤0.2	≤0.15	≤8.0	≥3.45
	0 – 200#	≥98.5	≤0.5	≤0.2	≤0.15	≤8.0	≥3.45
	0– 320#	≥98.5	≤0.5	≤0.2	≤0.15	≤8.0	≥3.45