Product Details

Products discription

1.Introduction

The main raw material of brown fused alumina is high quality bauxite, which is fused with the carbon material and scrap iron in the electic furnace under the high temperature of above 2200°C.The product is characterized by low expansion coefficient, high refractoriness, good thermal and chemical stability.

2. Grain size commonly used

Refractory: 0-1mm, 1-3mm, 3-5mm, 5-8mm ,200#-0, 325#-0.
Abrasives: F24-F60.
Sandblasting abrasive:F10-F240.
Precision casting: F80-100, F100-F120.
Ceramic & electronic polishing:F240-800.
3.Physical properties of Brown Fused Alumina

Item

Color

Color System

Mohs Hardness

Melting Temperature(°C)

Refractory Temperature(°C)

True Density( g/cm3)

Magnetic Material

Specification

Dark Brown

Alpha-alumina trigonal system

min9.0

2050°C

1800°C

min3.90

max0.01%

4.Chemical index of Brown Fused Alumina

Purpose	Specification		Chemical composition(%)				Magnetic material content(%)
			Al₂O₃	Fe₂O₃	SIO₂	TIO₂
For abrasive	F	4#—80#	min95	max0.3	max1.5	max3.0	max0.05
		90#—150#	min94				max0.03
		180#—240#	min93	max0.3	max1.5	max3.5	max0.02
	W	1#—63#	min2.5	max0.5	max1.8	max4.0	—
For refractory	Size sand	0—1mm	min95	max0.3	max1.5	max3.0	—
		1—3mm
		3—5mm
		5—8mm
	Fine powder	200#—0	min93.5	max0.5	max1.5	max3.5	—
		325#—0