SiO2,%

75-90

15-35

Cr2O3,%

1-5

30-45

Al2O3,%

5-10

10-15

Fe2O3,%

≤2

≤2

MgO,%

1-5

5-10

粒度/Granularity,mm

0-2

0.15-1

自開率,since opening rate%

≥98

≥98