Magnesia Spinel Brick
Your Professional Magnesia Spinel 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.
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![Magnesia Alumina Spinel Brick]()
Magnesia Alumina Spinel BrickMagnesia Alumina Spinel Bricks are primarily composed of periclase and magnesium-aluminate spinel. They are typically made from magnesite sand, synthetic magnesium-aluminate spinel, and specific...read more -
![Magnesia Iron Spinel Brick]()
Magnesia Iron Spinel BrickMagnesia iron spinel bricks are primarily made from high-purity magnesite and alumina-iron spinel sand.read more
● High thermal shock resistance.
● Strong corrosion... -
![Magnesia Alumina Chrome Spinel Brick]()
Magnesia Alumina Chrome Spinel BrickMagnesia Alumina Chrome Spinel Brick are specialty refractory bricks made from a composite of magnesium-aluminate-chrome spinel and fused magnesite, with the addition of special additivesread more
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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 spinel brick is a type of high-temperature refractory material made from magnesia (MgO) and spinel (MgAl2O4). It's used in industrial kilns, particularly in cement and glass manufacturing, due to its excellent thermal shock resistance, erosion resistance, and high-temperature strength.
Product Specification
We provide the following product specifications:
|
Type |
MFJ-85A |
MFJ-85B |
|
MgO % |
85 |
85 |
|
Al2O3 % |
3-5 |
4-7 |
|
Fe2O3 % |
4-6 |
3-5 |
|
SiO2 % |
1.5 |
1.8 |
|
Bulk Density (g/cm3) > |
2.98 |
2.96 |
|
Apparent Porosity(%) ≤ |
16 |
16 |
|
Cold Crushing Strength (Mpa) > |
65 |
65 |
|
Refractoriness Under Load (T6.0,9) > |
1700 |
1700 |
|
Thermal Shock Resistance (950℃-Air Cooling) (times) > |
100 |
90 |
|
Thermal Conductivity (W/m.K) |
2.6 |
2.6 |
|
Thermal Expansion (1400℃) % |
1.6 |
1.6 |
Advantages of Magnesia Spinel Brick
Thermal Shock Resistance
These bricks maintain integrity under rapid heating and cooling, minimizing the risk of spalling and unplanned shutdowns.
01
High Refractoriness
Magnesia alumina spinel brick can operate at continuous temperatures exceeding 1600°C, making them suitable for high-load, high-heat zones in kilns and furnaces.
02
Excellent Chemical Stability
They offer strong resistance against clinker, alkalis, slags, and corrosive fumes, which prolongs service life in aggressive operating environments.
03
Dimensional Stability
Their low permanent linear change ensures the lining stays intact and does not distort under high thermal cycling.
04
Compatibility with Other Refractory Materials
These bricks work well with insulating backup linings such as ceramic fibre modules, enhancing overall energy efficiency while providing robust protection on the hot face.
05
Applications of Magnesia Spinel Brick
Cement Rotary Kilns
Magnesia‑iron spinel bricks suit the burning zones of cement rotary kilns best. Their excellent resistance to slag erosion and kiln coating formation can effectively extend the service life of kiln linings and reduce the frequency of shutdowns for maintenance.
Glass Furnaces
Engineers can use both magnesia alumina spinel type and magnesia iron spinel type. However, for areas exposed to alkaline slags, magnesia iron spinel type offers greater advantages.
Steel Industry
The uses of magnesia alumina spinel type is for ladle linings, while the magnesia iron spinel type is better for specific areas of furnace linings.
Other High-Temperature Industries
Kerui technicians will give you suitable proposals.
Process of Magnesia Spinel Brick
Precise proportioning: Magnesium sand : spinel : binder = 70% : 25% : 5% (ratios adjustable per working conditions).
Nano-modified binder: Nano phosphate composite binder with 0.5% rare earth oxides (e.g., Y₂O₃) added to enhance low-temperature sintering activity.
Dynamic mixing: Fully automatic system mixes for 40 minutes to ensure even dispersion and avoid segregation.
High-pressure molding: Formed with 630-ton friction press, pressure ≥ 200 MPa, billet density ≥ 2.9 g/cm³, porosity <3%.
Microwave drying: 24-hour step drying (60°C → 110°C), moisture ≤ 0.5%, preventing cracking common in traditional kiln drying.
Gradient temperature-controlled sintering at 1600°C:
Low temperature (800–1000°C): Eliminates residual stresses
Medium temperature (1200–1400°C): Secondary spinel crystallization
High temperature (1550–1600°C): Densification sintering
Atmosphere protection: Full inert gas (nitrogen) environment to reduce oxidation and lattice defects, protecting the environment.
Certifications
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!
Package & Delivery
Package: Standard export package or Customized Package.
Delivery: By air express, by sea.
FAQ
As one of the most professional magnesia spinel brick manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy bulk customized magnesia spinel brick from our factory. Contact us for sample.
Cement Rotary Kiln Firing Zone, Calcining Zone of Cement Rotary Kiln, Magnesia iron spinel bricks for cement kiln