棕剛玉是由鋁礬土經電弧爐冶煉而成,主要化學成份為氧化鋁,呈棕褐色,產品硬度高、韌性大,用其製成的磨具適用於磨削碳素鋼、一般合金鋼、可鍛鑄鐵、硬青銅等,並廣氾應用於剛玉鐵溝澆鑄料,搗打料等耐火製品。
Chemical Composition
|
Grit Size
|
Al2O3
mass % - min.
|
Fe2O3 (Iron Oxide)
mass % - max
|
CaO (Calcium Oxide)
mass % -max
|
Titanium Oxide (TiO2)
mass %- max
|
F12-F20
|
95.0
|
0.2
|
0.3
|
1.7
|
F24-F90
|
95.0
|
0.2
|
0.3
|
F100-F120
|
95.0
|
0.2
|
0.4
|
F150-F180
|
95.0
|
0.3
|
0.4
|
F230-F280
|
95.0
|
0.4
|
0.5
|
F320-F600
|
94.0
|
0.4
|
0.5
|
F800-F1000
|
94.0
|
0.5
|
0.5
|
F1200
|
94.0
|
0.5
|
0.7
|