Chemical constitutions
| Chemical composition | Content index |
| AL2o3 | (Normal weighing value +4)% |
| AL2O3+Sio2 | ≥90% |
| Fe2o3 | <1% |
Chemical and physical properties
|
Main crystal phase AL2O3 Content Property |
Feldspar |
Feldspar-mullite |
Mullilte |
Mullite-corundum |
Corundum | ||
|
20-25 |
25-45 |
45-70 |
70-90 |
>90 | |||
|
Water sorption, % |
<3 |
<1 | |||||
|
Acid resistance, % |
>98 | ||||||
|
Alkali resistance, % |
>80 |
>82 |
>85 |
>90 |
>95 | ||
|
Spalling resistance, % |
>250 |
>300 |
>500 |
>700 |
>800 | ||
|
Temperature |
>1300 |
>1400 |
>1500 |
>1600 |
>1700 | ||
|
Crushing strength,N/particle |
?6 |
>200 |
>250 |
>300 |
>400 |
>500 | |
|
?8 |
>420 |
>460 |
>520 |
>600 |
>800 | ||
|
?10 |
>450 |
>500 |
>600 |
>800 |
>1000 | ||
|
?13 |
>600 |
>650 |
>700 |
>1000 |
>1200 | ||
|
?16 |
>700 |
>800 |
>1000 |
>1200 |
>1300 | ||
|
?20 |
>1100 |
>1200 |
>1500 |
>2000 |
>2300 | ||
|
?25 |
>1200 |
>1500 |
>1800 |
>2200 |
>2600 | ||
|
?30 |
>1600 |
>1800 |
>2600 |
>3000 |
>3200 | ||
|
?38 |
>1800 |
>2000 |
>3500 |
>4500 |
>3800 | ||
|
?50 |
>3500 |
>4000 |
>5000 |
>5800 |
>6200 | ||
|
?60 |
>4200 |
>5000 |
>6200 |
>7000 |
>7800 | ||
|
?75 |
>5200 |
>5800 |
>7200 |
>8000 |
>8500 | ||