Magnesia carbon bricks are a kind of unburned carbon composite refractory, which are manufactured with magnesium oxide of alkaline oxide with high-melting-point (2800℃), and carbon material with high melting point that is difficult to be eroded by furnace slag as the raw materials, and added all kinds of non-oxides additive and carbon binding agent. Magnesia carbon brick has features of low porosity, slag erosion resistance, thermal shock resistance and higher high-temperature strength. As a kind of composite refractory, magnesia carbon fire bricks utilize strong slag corrosion of magnesia and high thermal conductivity and low expansibility of carbon efficiently, can make up for the biggest disadvantage of worse spalling resistance of magnesia.
Magnesia carbon bricks main components are magnesium oxide and carbon, of which magnesium oxide content is 60~90% and carbon content is 10~40%. This kind material is made of high purity magnesia particle, carbon material, tar, pitch or resin as the raw materials through high temperature baking. So magnesite carbon bricks have properties of slag corrosion resistance, thermal shock resistance, thermal conductivity and etc.
According to cold mixing techniques with compound tar binding agent becomes harden and gets the necessary strength, thus form isotropous vitric carbon. Magnesia carbon bricks are made of pitch binding agent, which have higher high temperature plasticity because of forming anisotropic graphitization coke structure in the pitch carbonation process. This kind of carbon does not show the thermoplasticity that can duly remove amount of stress in the process of lined firing or operating.
|Apparent porosity% ≤||5.0||4.0||4.0||3.0||3.0|
|Bulk density g/cm3 ≥||3.00||3.00||2.98||2.95||2.92|
|Cold Crushing Strength MPa≥||50||40||40||35||35|
|Application||General use||Corrosion Resistance||Extra Corrosion Resistance|
Magnesia carbon bricks are mainly used for linings of converter, electric-arc furnace and direct current electric arc furnace, slag line of steel ladle and other position. and also can be used for basic oxygen furnace, slag line of ladle furnace and hot spot of electric arc furnace.
RS refractory factory as one of the leading kiln magnesite carbon bricks manufacturer, can supply quality magnesia carbon bricks for customers with professional engineers, advanced production technology and good before sale and after-sale service. RS refractory factory has specialized in magnesite carbon fire bricks for more than 20 years. If you have some demand of magnesia carbon brick, contact us for free, our sales will reply you at first time.