Home Brick for Glass Furnace Regenerator 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

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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Last updated: 2024-01-03
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