China orient mineral refactories co.,ltd.

Refractory Products

Directly Bonded Magnesia Chrome Bricks

ltems	OR-12	OR-9B	OR-9A	OR-6	OR-4
ltems	standard value	standard value	standard value	standard value	standard value
MgO,%	≥60	≥70	≥70	≥75	≥80
Cr2O3,%	≥12	≥9	≥9	≥6	≥4
SiO2,%	≤3.2	≤3.0	≤2.8	≤2.8	≤2.5
Apparent porosity(％)	≤19	≤19	≤19	≤18	≤18
Bulk Density g/cm³	≥3.0	≥2.98	≥2.98	≥2.95	≥2.93
cold crushing strength(MPa)	≥35	≥40	≥40	≥40	≥40
Refractoriness under load℃ 0.2MPa	≥1580	≥1580	≥1600	≥1600	≥1600
Thermal shock Resistance , times （1100℃-Water coolding)	≥4	≥4	≥4	≥4	≥4