Engineering Design
We deliver customized refractory and thermal designs for glass regenerators, to enhance heat exchange efficiency, structural stability, and campaign life.
Glass
MRL’s refractory solutions have helped numerous glass manufacturers achieve safer and more efficient production operations. With a strong track record of successful applications, we have supplied advanced refractory materials and services to float glass lines with daily melting capacities ranging from 400 to 1,000 tons, ensuring stable furnace operation and extended campaign life. By partnering with MRL, customers have significantly reduced the risk of unplanned furnace shutdowns, prolonged furnace service life, lowered maintenance costs, and improved both product quality and yield rates.
One-stop Glass Solution
Material Supply
We offer a full range of in-house developed refractory products, tailored to withstand chemical attack and thermal shock under heavy oil, natural gas, and petcoke firing.
On-Site Installation
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Lifecycle Support
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Professional Solutions for Every Steelmaking Furnace
In glass production, the structural integrity and refractory configuration of regenerators directly affect combustion efficiency, energy performance, and furnace life. MRL provides zone-specific material solutions for the crown, support, checkerwork, and bottom areas, addressing corrosion challenges caused by SOx, alkali vapors, and vanadium from different fuels. Supported by a complete product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and efficient regenerator systems.
Crown Zone
The regenerator crown is located at the top of the regenerator, forming an arched structure that supports its own weight and covers the checker brick stack below. As the area closest to the flame and high-temperature exhaust gases, the crown must withstand severe thermal shock and chemical attack while maintaining structural stability and effective thermal insulation.
Challenge
In the crown zone, refractory linings are challenged by multiple combined stresses. Vanadium- and sulfur-bearing vapors from fuels such as heavy oil rise with high-temperature flue gas and may condense on the crown surface, causing severe chemical corrosion that weakens material strength and increases the risk of penetration, local failure, or even crown collapse. At the same time, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and accumulated thermal stress, which can lead to cracking. In addition, the crown must continuously bear the dead load of the arched structure and overlying insulation; under prolonged high-temperature loading, improper material selection may result in arch deformation or sagging, compromising structural safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution for regenerator crowns. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium- and sulfur-induced corrosion, maintaining structural stability under frequent reversals and high-temperature flue gas exposure, thereby significantly extending crown service life. For extreme conditions involving petroleum coke or heavy oil combustion with high concentrations of vanadium and sulfur vapors, or where additional safety margins are required, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical corrosion resistance, a highly dense microstructure, and superior resistance to penetration and high-temperature creep, KAB bricks provide reliable protection in the most demanding crown environments.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.Contact us for more information for your specific application
Supporting Structure Zone
The regenerator supporting structure zone lies beneath the crown and includes the spring line, target wall, partition wall, and sidewalls. It serves as the primary load-bearing framework for the crown, checkerwork, and upper structures, while being directly exposed to high-temperature flames and exhaust gases. This zone endures combined thermal cycling, mechanical stress, and chemical attack, placing stringent demands on refractory strength, thermal shock resistance, and long-term structural stability.
Challenge & Solution
Target Wall
The target wall is directly exposed to flame impingement and chemical attack from fuel impurities and batch dust, making it prone to surface erosion and strength degradation. MRL applies GMB high-purity magnesia bricks or GMZ corrosion-resistant bricks to resist flame attack and alkaline vapors, ensuring long-term structural durability.
Spring Line
Located at the junction of the crown and wall, the spring line bears continuous structural loads while undergoing repeated thermal expansion and contraction, making it susceptible to stress concentration and cracking. MRL uses GMB or GMK high-strength refractory bricks to balance load-bearing capacity and thermal shock resistance, securing crown structural integrity.
Partition Wall
The partition wall supports structural loads while experiencing cyclic thermal stress, where accumulated thermal shock may cause cracking and compromise regenerator stability. MRL applies GMB or GMK bricks in the upper section, transitioning to GDN low-porosity fireclay bricks in lower areas to enhance thermal shock resistance and long-term load stability.
Sidewalls
Sidewalls are continuously exposed to dust-laden hot gases, alkali vapor attack, and gas abrasion, with improper material selection leading to deformation or accelerated wear. MRL optimizes sidewall linings with GMB, GMK, or GDN series bricks based on local thermal and flow conditions to ensure erosion resistance and long-term durability.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Checker Brick Zone
The regenerator checker brick zone is the most structurally complex and functionally critical part of the regenerator. Thousands of checker bricks are stacked to form vertical gas passages, alternately storing heat from high-temperature exhaust gases and releasing it to combustion air during flow reversal, playing a decisive role in furnace energy efficiency, fuel utilization, and overall operational stability.
Challenge & Solution
Upper Checker Zone
The upper checker zone operates at the highest temperatures and is exposed to severe thermal cycling, alkaline vapors, dust-laden flue gas, and batch carryover, making it prone to alkali attack, surface melting, and thermal spalling.MRL applies GMB high-purity magnesia bricks, with KAB or KAB-SR chrome-corundum bricks used under harsher fuel conditions, providing superior resistance to thermal shock and chemical attack to maintain long-term structural stability.
Middle Checker Zone
The middle checker zone operates in a temperature range where sulfate condensation and crystallization repeatedly occur, leading to internal salt deposition and progressive strength degradation.MRL utilizes GMZ and GMK series bricks, offering balanced sulfate resistance and thermal stability, with GMS olivine bricks applied selectively to control corrosion and maintain structural integrity.
Lower Checker Zone
The lower checker zone experiences lower temperatures with acid condensation while bearing the full mechanical load of the checker stack, requiring exceptional compressive strength and creep resistance.MRL applies GDN low-porosity fireclay bricks at the bottom layer to ensure load-bearing stability, prevent adverse reactions, and significantly reduce the risk of checker collapse.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Bottom Zone
The regenerator bottom zone is located beneath the checker brick stack and forms the foundation of the regenerator structure. The bottom refractories are installed on the checker support structure or furnace floor, bearing the weight of tens of tons of checker bricks above while also serving as the final passage for flue gas before discharge. Although this zone is not directly exposed to flame radiation, it plays a critical supporting and collecting role throughout the flow-reversal cycles and is essential to the overall structural stability of the regenerator.
Challenge
The regenerator bottom zone is challenged by condensation corrosion, dust accumulation, and sustained heavy mechanical load. Dust and debris falling from the checker structure tend to collect at the bottom, restricting airflow and accelerating corrosion. More critically, bottom bricks must continuously support the full checker stack load—reaching 8–10 t/m²—and therefore require excellent high-temperature creep resistance to prevent gradual compression, settlement, or cracking.
Solution
MRL recommends GDN low-porosity fireclay bricks for the regenerator bottom zone. With high density, extremely low apparent porosity, and strong high-temperature strength, GDN bricks resist acidic condensates while maintaining dimensional stability under heavy load. Their excellent creep resistance ensures long-term structural stability without significant deformation or collapse during prolonged high-temperature service.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Glass
MRL’s refractory solutions have helped numerous glass manufacturers achieve safer and more efficient production operations. With a strong track record of successful applications, we have supplied advanced refractory materials and services to float glass lines with daily melting capacities ranging from 400 to 1,000 tons, ensuring stable furnace operation and extended campaign life. By partnering with MRL, customers have significantly reduced the risk of unplanned furnace shutdowns, prolonged furnace service life, lowered maintenance costs, and improved both product quality and yield rates.
One-stop Glass Solution
Engineering Design
We deliver customized refractory and thermal designs for glass regenerators, to enhance heat exchange efficiency, structural stability, and campaign life.
Material Supply
We offer a full range of in-house developed refractory products, tailored to withstand chemical attack and thermal shock under heavy oil, natural gas, and petcoke firing.
On-Site Installation
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Lifecycle Support
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Professional Solutions for Every Steelmaking Furnace
In glass production, the structural integrity and refractory configuration of regenerators directly affect combustion efficiency, energy performance, and furnace life. MRL provides zone-specific material solutions for the crown, support, checkerwork, and bottom areas, addressing corrosion challenges caused by SOx, alkali vapors, and vanadium from different fuels. Supported by a complete product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and efficient regenerator systems.
Crown Zone
The regenerator crown is located at the top of the regenerator, forming an arched structure that supports its own weight and covers the checker brick stack below. As the area closest to the flame and high-temperature exhaust gases, the crown must withstand severe thermal shock and chemical attack while maintaining structural stability and effective thermal insulation.
Challenge
In the crown zone, refractory linings are challenged by multiple combined stresses. Vanadium- and sulfur-bearing vapors from fuels such as heavy oil rise with high-temperature flue gas and may condense on the crown surface, causing severe chemical corrosion that weakens material strength and increases the risk of penetration, local failure, or even crown collapse. At the same time, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and accumulated thermal stress, which can lead to cracking. In addition, the crown must continuously bear the dead load of the arched structure and overlying insulation; under prolonged high-temperature loading, improper material selection may result in arch deformation or sagging, compromising structural safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution for regenerator crowns. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium- and sulfur-induced corrosion, maintaining structural stability under frequent reversals and high-temperature flue gas exposure, thereby significantly extending crown service life. For extreme conditions involving petroleum coke or heavy oil combustion with high concentrations of vanadium and sulfur vapors, or where additional safety margins are required, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical corrosion resistance, a highly dense microstructure, and superior resistance to penetration and high-temperature creep, KAB bricks provide reliable protection in the most demanding crown environments.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.Contact us for more information for your specific application
Supporting Structure Zone
The regenerator supporting structure zone lies beneath the crown and includes the spring line, target wall, partition wall, and sidewalls. It serves as the primary load-bearing framework for the crown, checkerwork, and upper structures, while being directly exposed to high-temperature flames and exhaust gases. This zone endures combined thermal cycling, mechanical stress, and chemical attack, placing stringent demands on refractory strength, thermal shock resistance, and long-term structural stability.
Challenge & Solution
Target Wall
The target wall is directly exposed to flame impingement and chemical attack from fuel impurities and batch dust, making it prone to surface erosion and strength degradation. MRL applies GMB high-purity magnesia bricks or GMZ corrosion-resistant bricks to resist flame attack and alkaline vapors, ensuring long-term structural durability.
Spring Line
Located at the junction of the crown and wall, the spring line bears continuous structural loads while undergoing repeated thermal expansion and contraction, making it susceptible to stress concentration and cracking. MRL uses GMB or GMK high-strength refractory bricks to balance load-bearing capacity and thermal shock resistance, securing crown structural integrity.
Partition Wall
The partition wall supports structural loads while experiencing cyclic thermal stress, where accumulated thermal shock may cause cracking and compromise regenerator stability. MRL applies GMB or GMK bricks in the upper section, transitioning to GDN low-porosity fireclay bricks in lower areas to enhance thermal shock resistance and long-term load stability.
Sidewalls
Sidewalls are continuously exposed to dust-laden hot gases, alkali vapor attack, and gas abrasion, with improper material selection leading to deformation or accelerated wear. MRL optimizes sidewall linings with GMB, GMK, or GDN series bricks based on local thermal and flow conditions to ensure erosion resistance and long-term durability.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Checker Brick Zone
The regenerator checker brick zone is the most structurally complex and functionally critical part of the regenerator. Thousands of checker bricks are stacked to form vertical gas passages, alternately storing heat from high-temperature exhaust gases and releasing it to combustion air during flow reversal, playing a decisive role in furnace energy efficiency, fuel utilization, and overall operational stability.
Challenge & Solution
Upper Checker Zone
The upper checker zone operates at the highest temperatures and is exposed to severe thermal cycling, alkaline vapors, dust-laden flue gas, and batch carryover, making it prone to alkali attack, surface melting, and thermal spalling.MRL applies GMB high-purity magnesia bricks, with KAB or KAB-SR chrome-corundum bricks used under harsher fuel conditions, providing superior resistance to thermal shock and chemical attack to maintain long-term structural stability.
Middle Checker Zone
The middle checker zone operates in a temperature range where sulfate condensation and crystallization repeatedly occur, leading to internal salt deposition and progressive strength degradation.MRL utilizes GMZ and GMK series bricks, offering balanced sulfate resistance and thermal stability, with GMS olivine bricks applied selectively to control corrosion and maintain structural integrity.
Lower Checker Zone
The lower checker zone experiences lower temperatures with acid condensation while bearing the full mechanical load of the checker stack, requiring exceptional compressive strength and creep resistance.MRL applies GDN low-porosity fireclay bricks at the bottom layer to ensure load-bearing stability, prevent adverse reactions, and significantly reduce the risk of checker collapse.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Bottom Zone
The regenerator bottom zone is located beneath the checker brick stack and forms the foundation of the regenerator structure. The bottom refractories are installed on the checker support structure or furnace floor, bearing the weight of tens of tons of checker bricks above while also serving as the final passage for flue gas before discharge. Although this zone is not directly exposed to flame radiation, it plays a critical supporting and collecting role throughout the flow-reversal cycles and is essential to the overall structural stability of the regenerator.
Challenge
The regenerator bottom zone is challenged by condensation corrosion, dust accumulation, and sustained heavy mechanical load. Dust and debris falling from the checker structure tend to collect at the bottom, restricting airflow and accelerating corrosion. More critically, bottom bricks must continuously support the full checker stack load—reaching 8–10 t/m²—and therefore require excellent high-temperature creep resistance to prevent gradual compression, settlement, or cracking.
Solution
MRL recommends GDN low-porosity fireclay bricks for the regenerator bottom zone. With high density, extremely low apparent porosity, and strong high-temperature strength, GDN bricks resist acidic condensates while maintaining dimensional stability under heavy load. Their excellent creep resistance ensures long-term structural stability without significant deformation or collapse during prolonged high-temperature service.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Glass
MRL’s refractory solutions have helped numerous glass manufacturers achieve safer and more efficient production operations. With a strong track record of successful applications, we have supplied advanced refractory materials and services to float glass lines with daily melting capacities ranging from 400 to 1,000 tons, ensuring stable furnace operation and extended campaign life. By partnering with MRL, customers have significantly reduced the risk of unplanned furnace shutdowns, prolonged furnace service life, lowered maintenance costs, and improved both product quality and yield rates.
One-stop Glass Solution
Engineering Design
We deliver customized refractory and thermal designs for glass regenerators, to enhance heat exchange efficiency, structural stability, and campaign life.
Material Supply
We offer a full range of in-house developed refractory products, tailored to withstand chemical attack and thermal shock under heavy oil, natural gas, and petcoke firing.
On-Site Installation
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Lifecycle Support
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Regenerator Solution
In glass production, the structural integrity and refractory configuration of regenerators directly affect combustion efficiency, energy performance, and furnace life. MRL provides zone-specific material solutions for the crown, support, checkerwork, and bottom areas, addressing corrosion challenges caused by SOx, alkali vapors, and vanadium from different fuels. Supported by a complete product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and efficient regenerator systems.
Crown Zone
The regenerator crown is located at the top of the regenerator, forming an arched structure that supports its own weight and covers the checker brick stack below. As the area closest to the flame and high-temperature exhaust gases, the crown must withstand severe thermal shock and chemical attack while maintaining structural stability and effective thermal insulation.
Challenge
In the crown zone, refractory linings are challenged by multiple combined stresses. Vanadium- and sulfur-bearing vapors from fuels such as heavy oil rise with high-temperature flue gas and may condense on the crown surface, causing severe chemical corrosion that weakens material strength and increases the risk of penetration, local failure, or even crown collapse. At the same time, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and accumulated thermal stress, which can lead to cracking. In addition, the crown must continuously bear the dead load of the arched structure and overlying insulation; under prolonged high-temperature loading, improper material selection may result in arch deformation or sagging, compromising structural safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution for regenerator crowns. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium- and sulfur-induced corrosion, maintaining structural stability under frequent reversals and high-temperature flue gas exposure, thereby significantly extending crown service life. For extreme conditions involving petroleum coke or heavy oil combustion with high concentrations of vanadium and sulfur vapors, or where additional safety margins are required, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical corrosion resistance, a highly dense microstructure, and superior resistance to penetration and high-temperature creep, KAB bricks provide reliable protection in the most demanding crown environments.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.Contact us for more information for your specific application
Supporting Structure Zone
The regenerator supporting structure zone lies beneath the crown and includes the spring line, target wall, partition wall, and sidewalls. It serves as the primary load-bearing framework for the crown, checkerwork, and upper structures, while being directly exposed to high-temperature flames and exhaust gases. This zone endures combined thermal cycling, mechanical stress, and chemical attack, placing stringent demands on refractory strength, thermal shock resistance, and long-term structural stability.
Challenge & Solution
Target Wall
The target wall is directly exposed to flame impingement and chemical attack from fuel impurities and batch dust, making it prone to surface erosion and strength degradation. MRL applies GMB high-purity magnesia bricks or GMZ corrosion-resistant bricks to resist flame attack and alkaline vapors, ensuring long-term structural durability.
Spring Line
Located at the junction of the crown and wall, the spring line bears continuous structural loads while undergoing repeated thermal expansion and contraction, making it susceptible to stress concentration and cracking. MRL uses GMB or GMK high-strength refractory bricks to balance load-bearing capacity and thermal shock resistance, securing crown structural integrity.
Partition Wall
The partition wall supports structural loads while experiencing cyclic thermal stress, where accumulated thermal shock may cause cracking and compromise regenerator stability. MRL applies GMB or GMK bricks in the upper section, transitioning to GDN low-porosity fireclay bricks in lower areas to enhance thermal shock resistance and long-term load stability.
Sidewalls
Sidewalls are continuously exposed to dust-laden hot gases, alkali vapor attack, and gas abrasion, with improper material selection leading to deformation or accelerated wear. MRL optimizes sidewall linings with GMB, GMK, or GDN series bricks based on local thermal and flow conditions to ensure erosion resistance and long-term durability.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Checker Brick Zone
The regenerator checker brick zone is the most structurally complex and functionally critical part of the regenerator. Thousands of checker bricks are stacked to form vertical gas passages, alternately storing heat from high-temperature exhaust gases and releasing it to combustion air during flow reversal, playing a decisive role in furnace energy efficiency, fuel utilization, and overall operational stability.
Challenge & Solution
Upper Checker Zone
The upper checker zone operates at the highest temperatures and is exposed to severe thermal cycling, alkaline vapors, dust-laden flue gas, and batch carryover, making it prone to alkali attack, surface melting, and thermal spalling.MRL applies GMB high-purity magnesia bricks, with KAB or KAB-SR chrome-corundum bricks used under harsher fuel conditions, providing superior resistance to thermal shock and chemical attack to maintain long-term structural stability.
Middle Checker Zone
The middle checker zone operates in a temperature range where sulfate condensation and crystallization repeatedly occur, leading to internal salt deposition and progressive strength degradation.MRL utilizes GMZ and GMK series bricks, offering balanced sulfate resistance and thermal stability, with GMS olivine bricks applied selectively to control corrosion and maintain structural integrity.
Lower Checker Zone
The lower checker zone experiences lower temperatures with acid condensation while bearing the full mechanical load of the checker stack, requiring exceptional compressive strength and creep resistance.MRL applies GDN low-porosity fireclay bricks at the bottom layer to ensure load-bearing stability, prevent adverse reactions, and significantly reduce the risk of checker collapse.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.
Bottom Zone
The regenerator bottom zone is located beneath the checker brick stack and forms the foundation of the regenerator structure. The bottom refractories are installed on the checker support structure or furnace floor, bearing the weight of tens of tons of checker bricks above while also serving as the final passage for flue gas before discharge. Although this zone is not directly exposed to flame radiation, it plays a critical supporting and collecting role throughout the flow-reversal cycles and is essential to the overall structural stability of the regenerator.
Challenge
The regenerator bottom zone is challenged by condensation corrosion, dust accumulation, and sustained heavy mechanical load. Dust and debris falling from the checker structure tend to collect at the bottom, restricting airflow and accelerating corrosion. More critically, bottom bricks must continuously support the full checker stack load—reaching 8–10 t/m²—and therefore require excellent high-temperature creep resistance to prevent gradual compression, settlement, or cracking.
Solution
MRL recommends GDN low-porosity fireclay bricks for the regenerator bottom zone. With high density, extremely low apparent porosity, and strong high-temperature strength, GDN bricks resist acidic condensates while maintaining dimensional stability under heavy load. Their excellent creep resistance ensures long-term structural stability without significant deformation or collapse during prolonged high-temperature service.
Based on service conditions, MRL selects different grades and formulations even within the same series to ensure optimal performance by zone. Custom solutions are available—contact us for tailored support.