













Al2O3 Content (%)
12-16%
CaO Content (%)
0.3-1.8%
Fe2O3 Content (%)
0.15%-1.5%
K2O Content (%)
1.0 ~ 3.0 %
MgO Content (%)
0.2-0.5%
SiO2 Content (%)
70 ~ 75%
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