(1) Chemical constitutions
|
Chemical compositions |
Content |
|
AL2O3 |
(Standard value +4) % |
|
AL2O3+SiO2 |
≥92% |
|
Fe2O3 |
<1% |
(2) Physical and chemical properties
|
Main crystal phases AL2O3 Property |
Feldstar |
|
Mullite |
Mullite-corundum |
Corundum | |
|
20-25 |
25-45 |
45-70 |
70-90 |
>90 | ||
|
Bulk density, (g/cm3) |
1.4-2.0 | |||||
|
Water sorption, （%） |
<3 |
<1 | ||||
|
Acid resistance（%） |
>98 | |||||
|
Alkali resistance（%） |
>80 |
>82 |
>85 |
>90 |
>95 | |
|
Spalling resistance（℃） |
>250 |
>300 |
>500 |
>700 |
>800 | |
|
Refractoriness(℃) |
>1300 |
>1400 |
>1500 |
>1600 |
>1700 | |
|
Crushing strength, KN/particle |
?6 |
>0.40 |
>0.45 |
>0.6 |
>0.7 |
>0.8 |
|
?8 |
>0.7 |
>0.8 |
>0.9 |
>1.0 |
>1.2 | |
|
?10 |
>0.9 |
>1.0 |
>1.2 |
>1.5 |
>1.8 | |
|
?13 |
>1.2 |
>1.3 |
>1.6 |
>1.8 |
>2.0 | |
|
?16 |
>1.5 |
>1.6 |
>1.8 |
>2.3 |
>2.6 | |
|
?20 |
>1.8 |
>2.0 |
>2.3 |
>2.8 |
>3.20 | |
|
?25 |
>2.5 |
>2.8 |
>3.2 |
>3.6 |
>4.0 | |
|
?30 |
>2.8 |
>3.0 |
>3.5 |
>4.0 |
>4.5 | |
|
?38 |
>4.0 |
>4.5 |
>5.0 |
>5.5 |
>6.0 | |
|
?50 |
>6.0 |
>6.2 |
>10.0 |
>10.5 |
>11.0 | |
|
?60 |
>8.0 |
>8.5 |
>11.0 |
>12.0 |
>14.0 | |
|
?75 |
>13.0 |
>11.0 |
>12.0 |
>14.0 |
>15.0 | |