≥60
≥50
≥45
≥70
≥85
≥55
≥65
≥12
≥30
≥7
MgO≥12
MgO≥10
SiO2≤40
SiO2≤30
≤1.5
≥2.7
≥2.6
≥2.4
≥2.3
≥2.5
≥2.35
≥20
≥40
≥5
≥4
5~7
5~8
≥6