Description

Brown corundum is brown, made of bauxite and coke ( anthracite ) as main raw materials smelted at 2300℃ in a dumping furnace. Its main chemical components are Al2O3 and TiO2,and it also contains a small amount of SiO2 and Fe2O3 etc. Microhardness is HV 1800-2200. 

The grinding tools made of it is suitable for grinding metals with high tensile strength, such as various universal steel, wrought iron and hard bronze etc. It also can be used to make advanced refractory materials. Yuechi brown corundum has characteristics of high purity, good crystallization, corrosion resistance, no explosion and no cracking etc. The fire resistance temperature reaches to over 1900℃.

Specification

Brown fused aluminum main chemical index
Specification  Main chemical index Magnetic material(%) 
Al2O3 Fe2O3 SiO2 TiO2 CaO
F Grit F12-F24 95.5±0.5 <0.30 ≦1.00 >2.0 ≦0.45 ≦0.024
F30-F120 ≦0.019
F120-F220 ≦0.014
color  brown
crystal shape
Trigonal crystal system
Hexagonal crystal shape
hardness(mohs) ≥9.0
melting point(℃) 2250
max temperature(℃) 1900
true density(g/cm3) ≥3.90
linear expansivity (0-1600℃) 7-9
chemical indexs two nature

 

 Brown fused aluminum physical index
Color Brown 
Crystal form  Trigonal crystal system
Compression strength 34N
Milling toughness 41%
Vickers hardness 2100HV
True specific gravity 3.97g/cm3
Cleanliness  >97.5%
Capillarity 17mm

 

 

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