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refractories

Sintered Magnesia Brick

sintered Magnesia brick

The production process of magnesium aluminum series is quite similar to that of magnesia series. The only difference is that ingredients in the series contains a certain proportion of industrial alumina or super alumina clinker. The series is also be produced by pressure moulding and sintering within high temperature. The impurity content of industrial alumina is lower than that of high bauxite clinker. Adding natural bauxite clinker into ingredients is able to improve plasticity of the clay. In the same condition, volume density of raw bricks will be higher.

Application

The product is widely used in top space structure of glass furnace and the lining of calcined lime and cement rotary furnace.

Characteristics   

The series has advantages of good erosion resistance, peeling resistance, high temperature resistance, low product pollution, etc.

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The amount added of industrial alumina is commonly 5% ~ 10%. It is usually fine grinded together with magnesia by a certain proportion. With adding those fine powder, it is conducive to form an uniform distribution of new phases of magnesium aluminum spinel series in products substrate. In addition, another producing method is pre-synthesis magnesium aluminum spinel and then batching to produce as blocks. In the process of batching, large critical particle size is conducive to improve thermal shock resistance of the product. However, it goes against product density and strength. Therefore, the size is usually adopted to 3 mm.
The particle size is generally 3 ~ 1mm and 1 ~ 0.088mm, and the proportion of 3 ~ 2mm coarse particles and fine powder less than 0.088mm should be controlled to improve thermal shock resistance of the series. The combustion temperature of magnesium aluminum product should be determined on the basis of purity of raw materials. More specifically, the temperature should be generally 30℃~ 50℃ higher than that of magnesium product. And combustion temperature of high-purity magnesium aluminum product is 1750℃~ 1800℃.

sintered Magnesia brick Physical and Chemical Indicators

ItemMLJ-85AMLJ-93AMLJ-95AMLJ-85BMLJ-93BMLJ-95B
MgO85%88%93%82%85%90%
AI2O39%5%3%9%5%3%
Fe2O3 0.7%0.7%0.7%0.8%0.8%0.8%
SiO20.6%0.8%0.7%2.5%2%2.5%
Cr2O3
Apparent Porodsity16-18%16-18%16-18%17-18%17-18%17-18%
Bulk Density2.85g/cm32.85-3.0g/cm32.85g/cm32.8g/cm32.85g/cm32.82g/cm3
Cold Crushing Strength45Mpa45Mpa45Mpa40Mpa40Mpa40Mpa
Refraction Under Load (T0.2)1700Mpa1700Mpa1700Mpa1700Mpa1700Mpa1700Mpa
Thermal Shock Resistance cycles
1100°C (water cooling)
1100°C (air cooling)
12
100
12
100
12
100
10
80
10
80
10
80
Thermal Conductivity (1000°C)2.8W/mK2.9W/mK3.0W/mK2.8W/mK2.9W/mK3.0W/mK

sintered Magnesia brick Key Features

Elevate Your High-Temperature Operations with Sintered Magnesia Brick

In the realm of refractory materials, the Sintered Magnesia Brick, known interchangeably as Sintered Magnesia Alumina Spinel Brick, Magnesia Alumina Spinel Brick, Alumina Magnesia Spinel Brick, and variously referred to as Sintered Magnesia Block, Sintered Magnesia Alumina Spinel Block, Magnesia Alumina Spinel Block, and Alumina Magnesia Spinel Block, stands as the embodiment of excellence. Engineered for resilience in extreme heat, this versatile refractory product offers a multitude of benefits for a range of applications. Sintered Magnesia Brick is a type of refractory brick specifically designed to withstand high temperatures and harsh environments. It is made from a material known as magnesia, which is derived from naturally occurring magnesium carbonate or magnesium oxide.

Exceptional Attributes:
  • Unparalleled Heat Resistance: Sintered Magnesia Bricks are meticulously crafted to thrive in the most demanding high-temperature environments, ensuring the structural integrity of furnaces, kilns, and other critical equipment. They maintain their shape and strength even under the most intense heat conditions.
  • Chemical Durability: These bricks exhibit remarkable resistance to chemical corrosion and harsh environments, making them a dependable choice for applications where chemical stability is of utmost importance.
  • Mechanical Strength: A precise blend of magnesia and alumina spinel gives our Sintered Magnesia Brick outstanding mechanical strength, reducing wear and tear over time.
  • Precision Craftsmanship: Each brick is manufactured with precision and expertise, adhering to rigorous industry standards to deliver consistent and reliable performance across various applications.
Versatile Applications:
  • Steel Industry: These refractory products are integral to steelmaking processes, lining converters, ladles, and EAFs (Electric Arc Furnaces). Their capacity to endure extreme temperatures and chemical reactions is critical for the steel production process.
  • Glass Manufacturing: Glass furnaces rely on the resilience of these bricks to maintain high temperatures for melting raw materials, ensuring the production of top-quality glass products.
  • Ceramic Production: In ceramics and refractories manufacturing, these bricks play a pivotal role in constructing kilns and other equipment, ensuring the longevity and efficiency of operations.

By choosing Sintered Magnesia Brick, you’re investing in a refractory solution that seamlessly blends cutting-edge technology with proven reliability. Elevate your high-temperature processes, bolster efficiency, and secure long-lasting performance with this exceptional refractory product.

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