Fused rebonded magnesia-chrome bricks are produced by first melting light-burned magnesia and chrome ore in an electric arc furnace to create fused magnesia-chrome sand.
●...
Magnesia Chrome Brick
Your Professional Magnesia Chrome Brick Supplier！
Zinfon Refractory Technology Co.,Ltd is a comprehensive enterprise integrating R&D, design, production, sales, and service, and is one of the world's large-scale production bases for magnesium refractory materials. the products cover all kinds of alumina refractories, including: high alumina series, mullite series, siliceous series, phosphate series, lightweight heat preservation series and other stereotyped products; castables, self-flowing materials, malleable materials, prefabricated blocks and other non-stereotyped products, as well as all kinds of refractory raw materials and chemical products.
-
![Fused Magnesia Chrome Brick]()
-
![Regular Bonded Magnesia Chrome Brick]()
Regular Bonded Magnesia Chrome BrickMagnesia chrome bricks are alkaline refractory products generally refer to those produced using low-grade magnesite and imported chrome ore, also known as standard sintered magnesia-chrome bricks...read more -
![Direct-Bonded Magnesia Chrome Brick]()
Direct-Bonded Magnesia Chrome BrickDirect-bonded magnesia chrome bricks are characterized by the direct bonding of periclase and magnesia-chrome spinel as their main crystal phases.read more
● Low impurity and low... -
![Semi-Rebonded Magnesia Chrome Brick]()
Semi-Rebonded Magnesia Chrome BrickSemi-rebonded magnesia chrome bricks are produced from fused magnesia-chrome composite sand along with sintered magnesite, chrome ore, or pre-reacted magnesia-chrome sand, and are burned at high...read more
Why Choose Us
Rich Experience
With more than 20 years of experience, the company has its own R&D team and has supplied products to many traders.
Production Capacity
We have invested in two production lines equipped with 120-meter ultra-high-temperature tunnel kilns and a fully automatic crushing and grinding workshop for raw materials. With more than 100 employees, we achieve an annual output of 100,000 tons of various refractory products.
Our Qualification
We have passed through ISO9001, ISO14001, ISO45001 cerifications, as well as other national and local qualificaitons, such as Reliable Quality & Service Certification and Enterprises Credit Eveluation Cerfitification.
Magnesia Chrome Brick - Overview
Magnesia chrome brick is a type of refractory brick made primarily from magnesia (MgO) and chrome oxide (Cr2O3). It is a basic refractory material, meaning it can withstand high temperatures and is resistant to corrosion from basic slags. These bricks are commonly used in high-temperature industrial applications like steelmaking, non-ferrous metal processing, and cement production.
Product Specification
We provide the following product specifications:
|
Grade / Specifications |
YXMGe-8 |
YXMGe-10 |
YXMGe-12 |
YXMGe-16 |
YXMGe-18 |
|
|
Chemical Composition (%) |
MgO % |
70 |
68 |
65 |
63 |
60 |
|
SiO2 % |
3 |
3 |
3 |
3 |
3 |
|
|
Cr2O3 % |
8 |
10 |
12 |
16 |
18 |
|
|
Apparent Porosity (%) |
22 |
22 |
22 |
20 |
20 |
|
|
Bulk Density (g/cm3) |
2.95 |
3 |
3.05 |
3.1 |
3.15 |
|
|
Cold Crushing Strength (MPa) |
35 |
35 |
35 |
35 |
35 |
|
|
Refractoriness under Load ºC @0.2MPa |
1550 |
1580 |
1600 |
1600 |
1650 |
|
|
Thermal Shock Resistance 950ºC (Times) |
4 |
4 |
4 |
4 |
4 |
|
|
Thermal expansion % 1400°C |
|
|
|
|
|
|
|
Thermal conductivity 400℃ (W/m.k) |
|
|
|
|
|
|
Types of Magnesia Chrome Brick
Common Magnesia Chrome Brick
It is made from sintered magnesia and chrome ore, and sintered at high temperature, which is with higher bulk density and stronger thermal resistance than the magnesite brick, widely used in cement rotary kilns, glass kiln regenerators, permanent lining of steel furnace, and permanent lining of refining ladle.
Direct Bonded Magnesia-Chrome Brick
It is made from high purity magnesia and chromite materials and sintered under the high temperature in the tunnel kiln, it's widely used in the lining of the RH/DH vessel , cement rotary kiln, glass tank furnace, non-ferrous metal metallurgical furnace, AOD, VOD furnaces, etc.
Re-Bonded Magnesia- Chrome Brick
It is made from fully electro-fused MgO-Cr2O3 grain, and fired under more than 1700 ° C with weak oxidizing atmosphere. It's a high quality Magnesia Chrome product with excellent strength & volume stability at high temperature, excellent slag corrosion resistance and erosion resistance; widely used in second-refining furnance, like slag line of VOD and AOD, RH/DH's snorkels and regenerators of glass kiln ,etc.
Semi-Re-Bonded Magnesia-Chrome Brick
It is made from electro fused MgO-Cr2O3 grain, fused magnesia, chromite and some sintered MgO-Cr2O3 grain, then fired at high temperature. It has some characteristics both direct bonded and re-bonded, like dense inner structure, lower porosity, good high temperature strength, thermal shock resistance is better than re-bonded, slag erosion resistance better than direct bonded.
Advantages of Magnesia Chrome Brick
High Refractoriness
Magnesia chrome bricks can withstand very high temperatures without softening or deforming, making them suitable for demanding high-temperature applications like steelmaking furnaces.
01
Strong Resistance to Alkaline Slag
They are highly resistant to the corrosive effects of alkaline slags, which are commonly encountered in metallurgical processes.
02
Good Thermal Stability
Magnesia chrome bricks can withstand repeated heating and cooling cycles without significant damage, ensuring consistent performance over time.
03
High-Temperature Strength
They retain their mechanical strength at high temperatures, which is crucial for maintaining the structural integrity of furnace linings.
04
Resistance to Erosion
Magnesia chrome bricks are resistant to wear and tear from moving materials or abrasive substances within the furnace.
05
Raw Material of Magnesia Chrome Brick
Magnesium Oxide (MgO)
60%–80%; provides refractoriness and resistance to alkaline erosion.
Chromium Oxide (Cr₂O₃)
10%–30%; enhances high-temperature strength, thermal shock resistance, and creep resistance.
Binder
5%–10% refractory clay or organic additives to ensure green body strength.
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.
Process of Magnesia Chrome Brick
•Bonding Method: Clay serves as the bonding agent, reacting with MgO and Cr₂O₃ at high temperatures to form a ceramic bond-a relatively simple process.
•Sintering Temperature: Approximately 1500–1600°C, lower than that of directly bonded MgCr bricks.
Raw Material Preparation
•MgO: Usually sourced from magnesite (MgCO₃), producing lightly calcined magnesia (MgO ≥ 85%).
•Cr₂O₃: Obtained from calcined chromite (FeCr₂O₄), added at 10%–30%.
•Binder: Refractory clays (e.g., kaolin or bentonite) added at 5%–10%.
Dry Mixing
•Mix MgO, Cr₂O₃, and clay in specified proportions.
Wet Molding
•Add water or an organic binder (e.g., carboxymethyl cellulose), then press hydraulically at ~100–200 MPa.
Drying
•Dry in a tunnel dryer at 110–150°C for 24–48 hours.
Sintering
•Sinter in a rotary or shuttle kiln at 1500–1600°C for 2–4 hours.
•Key reaction: Clay reacts with MgO to form ceramic bonding phases (e.g., MgAl₂O₄).
Quality Inspection
•Test compressive strength, bulk density, apparent porosity, and thermal shock resistance.
Finished Product Packaging
•Bricks are packed with moisture-proof protection for safe transportation.
Customization Process
Customized dimensions and shapes
Customized Brick Shape: Provide Sample Sheets--Mold Opening & Quotation--Mold Opening & Sample Making--Bulk Production Quotation--Contract Signing--Bulk Production.
Delivery cycle and logistics
Sea freight, land freight. Determine the mode of transportation according to the needs. About 30 days, customized products delivery time depends on the actual situation.
Customized packaging
Customize your brand: Logo customization, custom fonts, taglines and messages for packaging, signage, websites or printed materials. Take your brand to the next level, contact us today to discuss your project!
Certifications
Package & Delivery
Package: Standard export package or Customized Package.
Delivery: By air express, by sea.
FAQ
As one of the most professional magnesia chrome brick manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy bulk customized magnesia chrome brick from our factory. Contact us for sample.
Magnesia spinel brick for Calderys furnace, Copper Smelting Refractory, fused spinel