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Brick for Glass Furnace Regenerator

  • Magnesia Brick for Glass Furnace Regenerator

    Magnesia Brick for Glass Furnace Regenerator

    Properties of Magnesia Brick for Glass Furnace Regenerator

    Magnesia Brick for Glass Furnace Regenerator (GMZ) made of different types of pure magnesite, processed by medium to high temperature sintering. With excellent resistance to strong alkaline vapour erosion, oxidation-reduction erosion and good thermal conductivity. They are applied as checker Bricks and Wall Bricks at middle & upper part of Glass Furnaces Regenerators

    The raw material of magnesia brick is mainly magnesite, and its basic component is MgCO3.
    Magnesia Brick for Glass Furnace Regenerator is an alkaline refractory material, which has strong resistance to alkaline slag, but cannot resist the erosion of acid slag. At 1600°C, it can react with Silica Brick, Clay Brick and even High Alumina Brick. The refractories of Magnesia Brick is above 2000°C, but its Refractories under Load (RUL) point is only 1500~1550°C. And the temperature interval from softening to 40% deformation is very small, only 30~50°C. The Thermal Shock Resistance of Magnesia Brick is also poor, which is an important reason for the damage of Magnesia Brick.


    When the liquid phase appears in the brick under high temperature, it will suddenly shrink. The thermal conductivity of Magnesia Brick is high, which is second only to Carbon Brick and Silicon Carbide Brick in refractory products. It decreases with the increase of temperature.

    The thermal shock resistance of Magnesia Brick is poor. Improving the purity of Magnesia Brick can appropriately improve the thermal shock resistance.
    Magnesia Brick for Glass Furnace Regenerator 1

    Production of Magnesia Brick for Glass Furnace Regenerator

    Various grades of dead-burned magnesite are available for the production of Magnesite Brick. They range from natural dead-burned materials, with MgO contents of 90% or less, to high purity synthetic magnesites containing 96% MgO or greater.

    A large amount of work has been done to produce highly refractory magnesites. Since magnesia itself has an extremely high melting point, i.e., 5070°F (2800°C), the ultimate refractoriness of a Magnesite Brick is often determined by the amount and type of impurity within the grain. In practice, the refractoriness of a dead burned magnesite is improved by lowering the amount of impurities, adjusting the chemistry of the impurities or both.

    Classification of Magnesia Brick for Glass Furnace Regenerator

    There are many types of magnesite refractories, both burned and chemically bonded. For simplification, they can be divided into two categories on the basis of chemistry. The first category consists of brick made with low boron magnesites, generally less than 0.02% boron oxide, that have limeto-silica ratios of two to one or greater. Often, the lime-to-silica ratio of these brick is intentionally adjusted to a molar ratio of two to one to create a dicalcium silicate bond that gives the brick high hot strength. Brick with lime-to-silica ratios greater than two to one are often of higher purity than the dicalcium silicate-bonded brick. This greater chemical purity makes them more desirable for certain applications. 

    The second category of Magnesite Brick generally has lime-to-silica ratios between zero and one, on a molar basis.

    These bricks may contain relatively high boron oxide contents (greater than 0.1% B2O3) in order to impart good hydration resistance. Sometimes, for economic reasons, these bricks are made with lower purity natural dead burned magnesites with magnesia contents of 95% or less. At other times, the brick are made with very pure magnesites with MgO contents greater than 98% for better refractoriness.

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Magnesia Brick for Glass Furnace Regenerator

    rhimagnesita We can produce RHI Magnesita standard Magnesia Brick for Glass Furnace Regenerator

    Refrateknik1 We can produce Refratechnik standard Magnesia Brick for Glass Furnace Regenerator

     

    More+

    Properties of Magnesia Brick for Glass Furnace Regenerator

    Magnesia Brick for Glass Furnace Regenerator (GMZ) made of different types of pure magnesite, processed by medium to high temperature sintering. With excellent resistance to strong alkaline vapour erosion, oxidation-reduction erosion and good thermal conductivity. They are applied as checker Bricks and Wall Bricks at middle & upper part of Glass Furnaces Regenerators

    The raw material of magnesia brick is mainly magnesite, and its basic component is MgCO3.
    Magnesia Brick for Glass Furnace Regenerator is an alkaline refractory material, which has strong resistance to alkaline slag, but cannot resist the erosion of acid slag. At 1600°C, it can react with Silica Brick, Clay Brick and even High Alumina Brick. The refractories of Magnesia Brick is above 2000°C, but its Refractories under Load (RUL) point is only 1500~1550°C. And the temperature interval from softening to 40% deformation is very small, only 30~50°C. The Thermal Shock Resistance of Magnesia Brick is also poor, which is an important reason for the damage of Magnesia Brick.


    When the liquid phase appears in the brick under high temperature, it will suddenly shrink. The thermal conductivity of Magnesia Brick is high, which is second only to Carbon Brick and Silicon Carbide Brick in refractory products. It decreases with the increase of temperature.

    The thermal shock resistance of Magnesia Brick is poor. Improving the purity of Magnesia Brick can appropriately improve the thermal shock resistance.
    Magnesia Brick for Glass Furnace Regenerator 1

    Production of Magnesia Brick for Glass Furnace Regenerator

    Various grades of dead-burned magnesite are available for the production of Magnesite Brick. They range from natural dead-burned materials, with MgO contents of 90% or less, to high purity synthetic magnesites containing 96% MgO or greater.

    A large amount of work has been done to produce highly refractory magnesites. Since magnesia itself has an extremely high melting point, i.e., 5070°F (2800°C), the ultimate refractoriness of a Magnesite Brick is often determined by the amount and type of impurity within the grain. In practice, the refractoriness of a dead burned magnesite is improved by lowering the amount of impurities, adjusting the chemistry of the impurities or both.

    Classification of Magnesia Brick for Glass Furnace Regenerator

    There are many types of magnesite refractories, both burned and chemically bonded. For simplification, they can be divided into two categories on the basis of chemistry. The first category consists of brick made with low boron magnesites, generally less than 0.02% boron oxide, that have limeto-silica ratios of two to one or greater. Often, the lime-to-silica ratio of these brick is intentionally adjusted to a molar ratio of two to one to create a dicalcium silicate bond that gives the brick high hot strength. Brick with lime-to-silica ratios greater than two to one are often of higher purity than the dicalcium silicate-bonded brick. This greater chemical purity makes them more desirable for certain applications. 

    The second category of Magnesite Brick generally has lime-to-silica ratios between zero and one, on a molar basis.

    These bricks may contain relatively high boron oxide contents (greater than 0.1% B2O3) in order to impart good hydration resistance. Sometimes, for economic reasons, these bricks are made with lower purity natural dead burned magnesites with magnesia contents of 95% or less. At other times, the brick are made with very pure magnesites with MgO contents greater than 98% for better refractoriness.

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Magnesia Brick for Glass Furnace Regenerator

    rhimagnesita We can produce RHI Magnesita standard Magnesia Brick for Glass Furnace Regenerator

    Refrateknik1 We can produce Refratechnik standard Magnesia Brick for Glass Furnace Regenerator

     

    OSYMEN

    MgO

    SiO2

    CaO

    A.P

    B.D

    CCS

    RUL

    %

    %

    %

    %

    g/cm3

    MPa

    (Ta)°C

    GMZ-91

    91.0

    3.0

    2.0

    15

    2.90

    70

    1550

    GMZ-93

    93.0

    2.0

    2.0

    15

    2.93

    70

    1580

    GMZ-95A

    95.0

    1.5

    1.5

    15

    2.95

    75

    1650

    GMZ-95B

    95.0

    1.5

    1.5

    16

    2.92

    70

    1620

    GMZ-96A

    96.2

    1.0

    1.5

    15

    2.96

    75

    1680

    GMZ-96B

    96.0

    1.2

    1.5

    16

    2.93

    70

    1650

    GMZ-97A

    97.1

    0.8

    1.2

    15

    3.00

    80

    1700

    GMZ-97B

    97.0

    0.8

    1.2

    16

    2.97

    75

    1680

    GMZ-98A

    97.6

    0.6

    1.2

    14

    3.10

    85

    1700

    GMZ-98B

    97.4

    0.6

    1.2

    15

    2.98

    80

    1700

    AP: Apparent Porosity   |  BD: Bulk Density  |  CCS: Cold Crushing Strength  |  RUL: Refractories Under Load  |  TSR: Thermal Shock Resistance  |  TE: Thermal Expansion

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  • Low Porosity Clay Brick for Glass Furnace Regenerator

    Low Porosity Clay Brick for Glass Furnace Regenerator

    Low Porosity Clay Brick for Glass Furnace Regenerator (GDN) are made of super calcined flint clay and calcined bauxite, with high pressure formed and high temperature sintered. Due to its low apparent porosity, strong resistance to erosion and high refractoriness under load, they are widely used in various furnaces, especially suitable to the middle and low parts of regenerator in glass furnaces.

    Low Porosity Clay Brick for Glass Furnace Regenerator

    Technical Overview of Low Porosity Clay Brick in Glass Kiln Regenerators

    Low porosity clay brick play a crucial role in the efficiency and durability of glass kiln regenerators. Understanding their properties, applications, and advantages is essential for optimizing kiln performance.

     

    Properties and Composition

    1. Porosity and Raw Materials: Low porosity clay brick typically have a porosity between 12-16%, sometimes even less than 10%. Their low porosity is primarily achieved using coke stone to adjust this property. When burnt stones are added, the performance of these bricks is enhanced, improving compactness, strength, and erosion resistance​​.

    2. Sintering and Performance: These bricks are sintered at high temperatures (usually 1350°C to 1380°C), which causes significant changes in the raw material matrix and enhances their erosion resistance, thermal shock resistance, and strength. An increase in the firing temperature to about 1420°C can slightly increase the density of the bricks and further reduce their porosity​​.

     

    Applications in Glass Kiln Regenerators

    1. Regenerator Structure: The regenerator chamber in a glass kiln is a critical component for waste heat recovery, involving heat storage and release. Its main structure includes the wall, lattice, bottom flue, and grate arch-supporting lattice​​.

    2. Placement in the Regenerator: Low porosity clay brick are generally used in the lower part of the regenerator. This placement is due to their ability to withstand the conditions prevalent in these areas, including the total weight and unit load stresses of the regenerator lattice body​​​​.

    3. Specific Use in the Regenerator: In certain designs, low porosity clay brick are used for the lower layer of the lattice body, where the temperature is below 800°C, and chemical erosion is relatively weak. Their strong creep resistance and good thermal shock resistance make them ideal for this application. High alumina bricks can serve as a transition layer between the middle and lower layers of the lattice body to prevent reactions between different types of bricks​​.

    4. Other Parts of the Regenerator: Besides the lower part of the regenerator, low porosity clay bricks are also used for the sidewall, partition wall, and grate of the regenerator. Their use in these parts is due to their suitability in areas where refractory erosion is less intense​​​​.

    5. Versatility: While primarily used in glass kiln regenerators, low porosity clay bricks are also applicable in blast furnaces, hot blast stoves, cement kilns, chemical kilns, and other types of kilns as lining materials​​.

     

    Advantages

    1. Thermal Shock Stability: The addition of additives in low porosity clay brick creates micropores during firing. These micropores can inhibit and prevent cracking, thus enhancing the bricks’ thermal shock stability and improving their resistance to peeling. This feature significantly increases the service life of kilns​​.

    2. Cost-Effectiveness: Due to their composition and enhanced durability, these bricks offer a cost-effective solution for high-temperature industrial applications, especially in sectors where long service life and reduced maintenance are essential.

     

    In summary, low porosity clay brick are an integral component of glass kiln regenerators, offering enhanced performance, durability, and efficiency. Their specific properties, such as low porosity, high strength, and thermal shock resistance, make them suitable for various sections of the regenerator, contributing to the overall efficiency and longevity of glass kilns.

     

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Low Porosity Clay Brick

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    Low Porosity Clay Brick for Glass Furnace Regenerator (GDN) are made of super calcined flint clay and calcined bauxite, with high pressure formed and high temperature sintered. Due to its low apparent porosity, strong resistance to erosion and high refractoriness under load, they are widely used in various furnaces, especially suitable to the middle and low parts of regenerator in glass furnaces.

    Low Porosity Clay Brick for Glass Furnace Regenerator

    Technical Overview of Low Porosity Clay Brick in Glass Kiln Regenerators

    Low porosity clay brick play a crucial role in the efficiency and durability of glass kiln regenerators. Understanding their properties, applications, and advantages is essential for optimizing kiln performance.

     

    Properties and Composition

    1. Porosity and Raw Materials: Low porosity clay brick typically have a porosity between 12-16%, sometimes even less than 10%. Their low porosity is primarily achieved using coke stone to adjust this property. When burnt stones are added, the performance of these bricks is enhanced, improving compactness, strength, and erosion resistance​​.

    2. Sintering and Performance: These bricks are sintered at high temperatures (usually 1350°C to 1380°C), which causes significant changes in the raw material matrix and enhances their erosion resistance, thermal shock resistance, and strength. An increase in the firing temperature to about 1420°C can slightly increase the density of the bricks and further reduce their porosity​​.

     

    Applications in Glass Kiln Regenerators

    1. Regenerator Structure: The regenerator chamber in a glass kiln is a critical component for waste heat recovery, involving heat storage and release. Its main structure includes the wall, lattice, bottom flue, and grate arch-supporting lattice​​.

    2. Placement in the Regenerator: Low porosity clay brick are generally used in the lower part of the regenerator. This placement is due to their ability to withstand the conditions prevalent in these areas, including the total weight and unit load stresses of the regenerator lattice body​​​​.

    3. Specific Use in the Regenerator: In certain designs, low porosity clay brick are used for the lower layer of the lattice body, where the temperature is below 800°C, and chemical erosion is relatively weak. Their strong creep resistance and good thermal shock resistance make them ideal for this application. High alumina bricks can serve as a transition layer between the middle and lower layers of the lattice body to prevent reactions between different types of bricks​​.

    4. Other Parts of the Regenerator: Besides the lower part of the regenerator, low porosity clay bricks are also used for the sidewall, partition wall, and grate of the regenerator. Their use in these parts is due to their suitability in areas where refractory erosion is less intense​​​​.

    5. Versatility: While primarily used in glass kiln regenerators, low porosity clay bricks are also applicable in blast furnaces, hot blast stoves, cement kilns, chemical kilns, and other types of kilns as lining materials​​.

     

    Advantages

    1. Thermal Shock Stability: The addition of additives in low porosity clay brick creates micropores during firing. These micropores can inhibit and prevent cracking, thus enhancing the bricks’ thermal shock stability and improving their resistance to peeling. This feature significantly increases the service life of kilns​​.

    2. Cost-Effectiveness: Due to their composition and enhanced durability, these bricks offer a cost-effective solution for high-temperature industrial applications, especially in sectors where long service life and reduced maintenance are essential.

     

    In summary, low porosity clay brick are an integral component of glass kiln regenerators, offering enhanced performance, durability, and efficiency. Their specific properties, such as low porosity, high strength, and thermal shock resistance, make them suitable for various sections of the regenerator, contributing to the overall efficiency and longevity of glass kilns.

     

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Low Porosity Clay Brick

    OSYMEN

    Al2O3

    Fe2O3

    A.P

    B.D

    C.C.S

    PLC

    RUL

    1400°CX2hrs

    1500°CX2hrs

    %

    %

    %

    g/cm3

    MPa

    %

    %

    (Ta)°C

    GDN-11

    47

    1.2

    11

    2.4

    80

     

    +0.1~-0.2

    1520

    GDN-14

    45

    1.5

    14

    2.34

    65

    +0.1~-0.2

     

    1470

    GDN-17

    42

    1.8

    17

    2.26

    50

    +0.1~-0.2

     

    1430

    AP: Apparent Porosity   |  BD: Bulk Density  |  CCS: Cold Crushing Strength  |  RUL: Refractories Under Load  | PLC: Permanent Linear Change

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  • Magnesia Chrome Brick for Glass Furnace Regenerator

    Magnesia Chrome Brick for Glass Furnace Regenerator

    Magnesia Chrome Brick for Glass Furnace Regenerator (GMK) is made of magnesia and chromite, processed by high temperature or ultra-high temperature sintering. With properties of excellent thermal shock stability, resistance to alkaline vapour repeated condensing and evaporating erosions.

    Magnesia Chrome Brick containing chrome continue to be an important group of materials due to their excellent slag resistance, superior spalling resistance, good hot strengths and other features. Historically, silicates in the groundmass or matrix formed the bond between the chrome ore and periclase in the brick. However, the advent of high purity raw materials in combination with high firing temperatures made it possible to produce “direct bonded” brick, where a ceramic bond between the chrome ore and periclase particles exists. These direct bonded bricks exhibit superior slag resistance and strengths at elevated temperatures.
    Magnesia Chrome Brick for Glass Furnace Regenerator
    They are applied as Lattice Bricks and Wall Bricks at middle lower part of medium to large Glass Furnaces Regenerators.

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Magnesia Chrome Brick for Glass Furnace Regenerator

    rhimagnesita We can produce RHI Magnesita standard Magnesia Chrome Brick for Glass Furnace Regenerator

    Refrateknik1 We can produce Refratechnik standard Magnesia Chrome Brick for Glass Furnace Regenerator

    More+

    Magnesia Chrome Brick for Glass Furnace Regenerator (GMK) is made of magnesia and chromite, processed by high temperature or ultra-high temperature sintering. With properties of excellent thermal shock stability, resistance to alkaline vapour repeated condensing and evaporating erosions.

    Magnesia Chrome Brick containing chrome continue to be an important group of materials due to their excellent slag resistance, superior spalling resistance, good hot strengths and other features. Historically, silicates in the groundmass or matrix formed the bond between the chrome ore and periclase in the brick. However, the advent of high purity raw materials in combination with high firing temperatures made it possible to produce “direct bonded” brick, where a ceramic bond between the chrome ore and periclase particles exists. These direct bonded bricks exhibit superior slag resistance and strengths at elevated temperatures.
    Magnesia Chrome Brick for Glass Furnace Regenerator
    They are applied as Lattice Bricks and Wall Bricks at middle lower part of medium to large Glass Furnaces Regenerators.

    %E4%B8%8B%E8%BD%BD We can produce Harbinson Walker International standard Magnesia Chrome Brick for Glass Furnace Regenerator

    rhimagnesita We can produce RHI Magnesita standard Magnesia Chrome Brick for Glass Furnace Regenerator

    Refrateknik1 We can produce Refratechnik standard Magnesia Chrome Brick for Glass Furnace Regenerator

     OSYMEN

    MgO

    SiO2

    Cr2O3

    A.P

    B.D

    CCS

    RUL

    %

    %

    %

    %

    g/cm3

    MPa

    (Ta)°C

    GMK-12A

    74

    1.2

    12-15

    16.0

    3.10

    60

    1700

    GMK-12B

    74

    1.5

    12-15

    17.0

    3.05

    55

    1660

    GMK-12C

    72

    1.5

    12-15

    18.0

    3.00

    50

    1650

    GMK-20A

    57

    1.2

    20-23

    17.0

    3.10

    60

    1700

    GMK-20B

    57

    1.5

    20-23

    18.0

    3.05

    55

    1660

    GMK-20C

    55

    1.5

    20-23

    18.0

    3.00

    50

    1650

    AP: Apparent Porosity   |  BD: Bulk Density  |  CCS: Cold Crushing Strength  |  RUL: Refractories Under Load

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Last updated: 2024-01-03
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