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 empower glass manufacturers to achieve safer, more efficient, and continuous production. With a proven track record, we have supplied high-performance refractories to float glass lines with daily pull rates ranging from 400 to 1,000 tons, ensuring furnace stability and optimized campaign life. By partnering with MRL, customers significantly mitigate the risk of unscheduled cold repairs, prolong furnace longevity, and enhance both glass quality and pack 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 provide full-lifecycle technical support aimed at extending lining life, enhancing operational performance, and minimizing the risk of unscheduled cold repairs.
Professional Solutions for Every Steelmaking Furnace
In glass production, the structural integrity and refractory configuration of regenerators directly determine thermal efficiency, energy performance, and campaign longevity. MRL provides zone-specific material solutions for the crown, target walls, checkerwork, and rider arches, addressing corrosion challenges caused by SOx, alkali volatiles, and vanadium from various fuel types. Supported by a comprehensive product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and energy-efficient regenerator systems.
Crown Zone
The regenerator crown forms the arched enclosure at the top of the regenerator, supporting its own weight and protecting the checkerwork below. As the area closest to the combustion chamber and high-temperature exhaust gases, the crown must withstand intense thermal shock and chemical attack while maintaining structural integrity and effective thermal insulation.
Challenge
In the crown zone, refractory linings face synergistic stresses. Vanadium- and sulfur-bearing volatiles from fuels such as heavy oil rise with flue gases and may condense on the crown surface, causing severe chemical corrosion that degrades material strength and increases the risk of penetration or even structural collapse. Simultaneously, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and thermal stress accumulation, which can lead to cracking and spalling. Additionally, the crown must bear the constant dead load of the arch and insulation; under prolonged high-temperature exposure, improper material selection can result in arch deformation or sagging, compromising furnace safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium/sulfur-induced corrosion, maintaining stability under frequent reversals and high-temperature exposure to significantly extend crown service life. For extreme conditions involving pet-coke or heavy oil with high impurity concentrations, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical resistance, a densified microstructure, and superior creep resistance, KAB bricks provide reliable protection and a maximized safety margin 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 empower glass manufacturers to achieve safer, more efficient, and continuous production. With a proven track record, we have supplied high-performance refractories to float glass lines with daily pull rates ranging from 400 to 1,000 tons, ensuring furnace stability and optimized campaign life. By partnering with MRL, customers significantly mitigate the risk of unscheduled cold repairs, prolong furnace longevity, and enhance both glass quality and pack 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 provide full-lifecycle technical support aimed at extending lining life, enhancing operational performance, and minimizing the risk of unscheduled cold repairs.
Professional Solutions for Every Steelmaking Furnace
In glass production, the structural integrity and refractory configuration of regenerators directly determine thermal efficiency, energy performance, and campaign longevity. MRL provides zone-specific material solutions for the crown, target walls, checkerwork, and rider arches, addressing corrosion challenges caused by SOx, alkali volatiles, and vanadium from various fuel types. Supported by a comprehensive product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and energy-efficient regenerator systems.
Crown Zone
The regenerator crown forms the arched enclosure at the top of the regenerator, supporting its own weight and protecting the checkerwork below. As the area closest to the combustion chamber and high-temperature exhaust gases, the crown must withstand intense thermal shock and chemical attack while maintaining structural integrity and effective thermal insulation.
Challenge
In the crown zone, refractory linings face synergistic stresses. Vanadium- and sulfur-bearing volatiles from fuels such as heavy oil rise with flue gases and may condense on the crown surface, causing severe chemical corrosion that degrades material strength and increases the risk of penetration or even structural collapse. Simultaneously, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and thermal stress accumulation, which can lead to cracking and spalling. Additionally, the crown must bear the constant dead load of the arch and insulation; under prolonged high-temperature exposure, improper material selection can result in arch deformation or sagging, compromising furnace safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium/sulfur-induced corrosion, maintaining stability under frequent reversals and high-temperature exposure to significantly extend crown service life. For extreme conditions involving pet-coke or heavy oil with high impurity concentrations, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical resistance, a densified microstructure, and superior creep resistance, KAB bricks provide reliable protection and a maximized safety margin 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 empower glass manufacturers to achieve safer, more efficient, and continuous production. With a proven track record, we have supplied high-performance refractories to float glass lines with daily pull rates ranging from 400 to 1,000 tons, ensuring furnace stability and optimized campaign life. By partnering with MRL, customers significantly mitigate the risk of unscheduled cold repairs, prolong furnace longevity, and enhance both glass quality and pack 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 comprehensive portfolio of in-house developed refractory products, tailored to withstand chemical attack and thermal shock under heavy oil, natural gas, and pet-coke firing.
On-Site Installation
We deliver standardized installation, on-site support, and remote guidance to ensure construction quality and efficiency.
Lifecycle Support
We provide full-lifecycle technical support aimed at extending lining life, enhancing operational performance, and minimizing the risk of unscheduled cold repairs.
Solutions for Glass Regenerators
In glass production, the structural integrity and refractory configuration of regenerators directly determine thermal efficiency, energy performance, and campaign longevity. MRL provides zone-specific material solutions for the crown, target walls, checkerwork, and rider arches, addressing corrosion challenges caused by SOx, alkali volatiles, and vanadium from various fuel types. Supported by a comprehensive product portfolio and on-site technical expertise, MRL helps customers build stable, durable, and energy-efficient regenerator systems.
Crown Zone
The regenerator crown forms the arched enclosure at the top of the regenerator, supporting its own weight and protecting the checkerwork below. As the area closest to the combustion chamber and high-temperature exhaust gases, the crown must withstand intense thermal shock and chemical attack while maintaining structural integrity and effective thermal insulation.
Challenge
In the crown zone, refractory linings face synergistic stresses. Vanadium- and sulfur-bearing volatiles from fuels such as heavy oil rise with flue gases and may condense on the crown surface, causing severe chemical corrosion that degrades material strength and increases the risk of penetration or even structural collapse. Simultaneously, frequent regenerator reversals generate cyclic temperature fluctuations, subjecting crown bricks to repeated thermal shock and thermal stress accumulation, which can lead to cracking and spalling. Additionally, the crown must bear the constant dead load of the arch and insulation; under prolonged high-temperature exposure, improper material selection can result in arch deformation or sagging, compromising furnace safety.
Solution
To address these challenges, MRL recommends GMB series high-performance magnesia bricks as the primary solution. GMB bricks offer excellent thermal shock resistance and strong resistance to vanadium/sulfur-induced corrosion, maintaining stability under frequent reversals and high-temperature exposure to significantly extend crown service life. For extreme conditions involving pet-coke or heavy oil with high impurity concentrations, KAB series fused chrome-corundum bricks are applied as an enhanced option. With exceptional chemical resistance, a densified microstructure, and superior creep resistance, KAB bricks provide reliable protection and a maximized safety margin 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.