Black Fused Alumina Black Corundum for Abrasives

black fused alumina black corundum for abrasives

Black aluminum oxide fused corundum is also known as low aluminum corundum. It is also anew type product of polishing material, and it is adark gray crystal body made α-Al2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.

Black Fused Alumina Chemcal Analysis

Chemical Composition (% by weight)

Range of Grits

Chemical Composition

Al2O3

SiO2

Fe2O3

TiO2

24#-100#

85

11

5.0

1.5-3.5

120#-200#

75-81

9-12

4-6

2-3

240#-280#

64

10

7.0

1.5-3.0

Black Fused Alumina physical properties

Hardness (Mohs)≥ 9.0

Melting point (°C)2050

The maximum temperature (°C)1850

True Density (g/cm3)≥ 3. 50

Linear expansion coefficient (0-1600 °C)7-9

High content industry calcined black fused alumina Application

Application1. Extremely hard, sharp, and durable abrasive2. Angular shape and fairly high bulk density will produce amatte surface finish3. Abrasive is generally reusable many times because of its hardness and durability4. Anchor pattern creation prior to coating or bonding5.Rust, scale, or other tough contaminant removal6. Application must tolerate some metal removal7. Used for grinding and lapping as well as abrasive blasting
Packing and shipping

Packing1. 25pvc bags2. 25KGS PVC BAGS+1MT BIG BAG
3.1MT Big Bag+Pallet4.25KGS PVC BAGS+PalletPackaging can be customized according to customer requirement
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