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Basic refractory

Direct bonded MgO-Cr₂O₃ bricks

Direct bonded MgO-Cr₂O₃ bricks are made from high quality magnesia and chrome ore. With the characteristics of little impurity, higher direct bonding rate due to being fired at high temperature, high strength, good corrosion resistance, thermal shock resistance, high temperature performance as well as easiness of kiln coating, the products have found wide application in burning zone of large dry-method cement rotary kilns as well as in refining furnace of metallurgical industry.
　

Data sheet of direct bonded MgO-Cr₂O₃ bricks

	DMC-12	DMC-9-B	DMC-9-A	DMC-6	DMC-4
MgO, %	≥60	≥70	≥70	≥75	≥80
Cr₂O₃, %	≥12	≥9	≥9	≥6	≥4
Si₂O, %	≤3.2	≤3.0	≤2.8	≤2.8	≤2.5
AP, %	≤19	≤19	≤19	≤18	≤18
BD, g/cm³	≥3.00	≥2.98	≥2.98	≥2.95	≥2.93
0.2MPa T₂ RUL, ℃	≥1580	≥1580	≥1600	≥1600	≥1600
CCS, MPa	≥35	≥40	≥40	≥40	≥40
Thermal shock resistance (1100℃, water-cooling), cycle	≥4	≥4	≥4	≥4	≥4