Magnesia Chrome Brick is a kind of basic refractory material with more than 90% magnesium oxide content and periclase as the main crystal phase, which has excellent properties of high refractoriness, high temperature strength, good thermal shock resistance and strong basic slag erosion resistance and is mainly used for steelmaking basic open-hearth furnace, electric furnace bottom and wall, permanent lining of oxygen converter, non-ferrous metal metallurgy furnace, high-temperature tunnel kiln, lining of rotary kiln, furnace bottom and wall of heating furnace, regenerative chamber of glass furnace and etc.
Description for Magnesia Chrome Brick
Magnesia Chrome Brick, a kind of refractory material, is made of magnesite and chromium concentrate as the main raw material, molded through high pressure and fired in the high temperature.
Heat-resistance temperature of Magnesia Chrome Brick: The maximum allowed environment temperature is 1700℃. It has features of high strength, high refractoriness under load, high alkali erosion resistance and high thermal shock resistance under the load conditions of 1500~1650℃. Magnesia Chrome Brick has big advantages of environmental protection and long service life.
Direct Bonded Magnesia Chrome Brick is manufactured with quality magnesia and chromic oxide as the raw material, molded through high press and fired in the high temperature. It has features of large crystal and high direct bonding rate. The product has good cracking resistance and good acid slag erosion resistance with its low-alkaline property. Direct Bonded Magnesia Chrome Brick is the ideal lining brick material for finery out of furnace, electric furnace, glass furnace, melting furnace and rotary cement kiln.
Magnesia Chrome Brick Properties
- High Refractoriness
- High Temperature Strength
- Strong Basic Slag Erosion Resistance
- Good Thermal Shock Resistance
- Certain Resistance to Acid Slag
Application of Magnesia Chrome Brick
- Magnesia Chrome Brick is mainly used in metallurgical industry, such as for building open-hearth furnace top, electric furnace top, finery out of furnace and all kinds of non-ferrous metal metallurgy furnace.
- Fused cast magnesite chrome brick is adopted for high temperature position of furnace wall in electric furnace with ultra high power.
- Magnesia chrome brick that made of synthetic compost is adopted for strong erosion area in finery out of furnace.
- Fused cast magnesite chrome brick or magnesia chrome brick that made of synthetic compost is adopted for strong erosion area of nonferrous metals flash smelting furnace.
- Besides, Magnesia Chrome Brick also can be used for burning zone in rotary cement kiln and regenerative chamber in glass furnace.
Production Process of Magnesia Chrome Brick
- Production process of firing magnesia chrome brick is similar with magnesia brick. To eliminate the loose effect of brick in the firing process that result from expansion when generate spinel caused by the ferrous oxide reaction of MgO and Cr2O3, Al2O3 or Direct Bonded Magnesia Chrome Brick. Magnesia chrome brick also can be made of composite common sintered material.
- Besides, there is also unfired magnesite-chrome brick, such as unfired magnesite-chrome brick made of inorganic magnesium saline solution combination. It has properties of simple manufacturing process, low cost and good thermal shock resistance. But its high temperature strength is not nearly so as burnt brick.
- Direct bonding of high temperature phase of periclase and spinel and distribute isolated island-liked distribution of low melting phase of silicate make that Direct Bonded Magnesia Chrome Brick has features of pure raw material, high firing temperature, high temperature strength and slag erosion resistance.
- Use fines that made of chromium minerals and magnesia together to grind pressed shape, which is effective action to eliminate loose effect.
- Magnesia chrome brick made of this method compares with common magnesia chrome brick, its apparent porosity is low, compression strength, refractoriness under load and bending strength is higher.
- Magnesia Chrome Bricks made of synthetic magnesia chromite clinker through firing in the high temperature and pressed shape with chromium minerals and magnesite have better slag erosion resistance and high temperature strength.
- Besides, there are also fused cast magnesite chrome brick that is made of magnesia-chrome materials fused by Arc Furnaces through direct pouring and rebonded magnesia-chrome brick that is made of fused magnesia chrome materials according to the bricks’ production process.
Technical Index of Magnesia Chrome Brick
|Magnesia Chrome Brick|
|Cold Crushing Strength≥(MPA) (15℃-25℃)||24.5||24.5||24.5||24.5||40||40||40|
|0.2MPa Refractoriness Under Load ≥ (℃)||1550||1550||1550||1530||1680||1650||1620|
Magnesia Chrome Brick Manufacturer
Rongsheng Refractory Factory manufactures quality Magnesia Chrome Brick. We have professional production equipment and advanced manufacturing technology. We insist on providing customes with the best quality products according your actrual need. Welcome to buy cheap Magnesia Chrome Brick from Rongsheng Kiln Refractory Fire Bricks Supplier.Leave your requirements about our refractory bricks. We will reply you within 24 hours. :