Huachen Refractory
Magnesia Chrome Refractory Brick Factory From China
Phone / WhatsApp
008618939512185
Email: info@hcrefractory.com
www.magnesiachromebrick.com
Huachen Refractory
Magnesia Chrome Refractory Brick Factory From China
Direct bonded magnesia chrome brick
Other name: Direct bonded MgO-Cr2O3 refractory brick
Model Number: DMC12A,DMC9A,DMC12B,DMC9B,DMC20C,DMC18C,DMC16C,DMC12C
Certification: ISO9001-14001
Minimum Order Quantity: 5 MT
Direct bonded magnesia chrome brick
Introduction
Direct bonded magnesia chrome refractory brick uses high purity sintered magnesia and chromium concentrate as main raw materials, manufactured by sintering at high temperature or ultra-high temperature. In order to form direct bonded, the SiO2 content in raw materials is best to low, and that the sintering temperature must be raised to about 1700℃.
Features
Direct bonded magnesia chrome refractory bricks for RH furnace have the advantages of less impurities, lower porosity, high strength, strong abrasion resistance, high corrosion resistance, high thermal shock-resistance and flake resistance.
Physical and Chemical
Index | DMC12A | DMC9A | DMC12B | DMC9B | DMC20C | DMC18C | DMC16C | DMC12C |
MgO(%) ≥ | 65 | 70 | 65 | 75 | 55 | 60 | 65 | 70 |
Cr2O3(%) ≥ | 12 | 9 | 12 | 9 | 20 | 18 | 16 | 12 |
SiO2(%) ≤ | 2.5 | 2.2 | 2.0 | 1.8 | 2.5 | 2.4 | 2.4 | 2.0 |
Apparent porosity(%) ≤ | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
Bulk density(g/cm3) ≥ | 3.00 | 3.00 | 3.05 | 3.05 | 3.15 | 3.10 | 3.05 | 3.00 |
Cold Crushing Strength MPa ≥ | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
Refractoriness Under Load 0.2MPa℃ | 1650 | 1650 | 1680 | 1680 | 1700 | 1700 | 1700 | 1680 |
Thermal Shock Resistance 950℃ Air cooling, 1100℃ Water cooling (times) ≥ | 4 | 4 | 6 | 6 | 6 | 6 | 6 | 6 |
Application
Direct bonded magnesia chrome refractory bricks are mainly used as permanent linings in lower vessel and snorkel etc. Besides, direct bonded magnesia chrome bricks are also used for VOD furnace barrel.
