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Home / Products / Refractory Brick / Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick
  • Mullite Insulating Brick

Mullite Insulating Brick

Application: Various industrial kilns, such as ceiling, wall, and lining materials of roller hearth furnaces, annular furnaces, bell furnaces, heating furnaces, cracking furnaces, thermal furnaces, shuttle kilns, tunnel kilns, roller kilns, ammonia kilns, enamel kilns.

Property: High dimensional accuracy, white appearance, uniform structure, low thermal coefficient, well heat stability. Such brick can be processed into a special form to reduce the bricking number and joint.

 

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Typical Chemical and Physical Index:

Index/Model HJM20 HJM23 HJM25 HJM26 HJM26-60 HJM28 HJM30 HJM32
Classification Temperatures（℃） 1230 1260 1380 1430 1430 1540 1650 1760
Bulk Density(kg/m³) 480 600 800 800 800 900 1030 1250
Permanent Linear Change,  ℃× hrs （% ） 1200×24 1230×24 1350×24 1400×24 1400×24 1510×24 1570×24 1620×24
-0.2 -0.2 -0.4 -0.4 -0.2 -0.5 -0.7 -0.9
Cold Crushing Strength (Mpa) 1 1 1.8 1.8 2.5 2.8 3 3.5
Modulus of Rupture (Mpa) 0.6 0.8 1.2 1.2 1.2 1.4 1.6 1.8
Thermal Conductivity(350℃ w/m.k) 0.12 0.15 0.26 0.26 0.26 0.33 0.38 0.43
Chemical Composition % Al2O3 37 39 51 55 58 65 72 78
Fe2O3 1 1 0.85 0.85 0.8 0.6 0.45 0.4

Index/Model HJM-A1 HJM-A2 HJM-A3 HJM-A4 HJM-A5 HJM-A6 HJM-A7 HJM-B1 HJM-B2 HJM-B4 HJM-B5 HJM-B6 HJM-B7 HJM-C1 HJM-C2 HJM-C3
Temperature ℃ that does not exceed a residual line change rate of ± 2% 900 1000 1100 1200 1300 1400 1600 900 1000 1200 1300 1400 1500 1300 1400 1500
Bulk Density  g/cm³ 0．50≥ 0．50≥ 0．55≥ 0．55≥ 0．60≥ 0．70≥ 0．75≥ 0．70≥ 0．70≥ 0．80≥ 0．80≥ 0．90≥ 1．00≥ 1.10≥ 1.20≥ 1.25≥
Test result 0.48 0.49 0.52 0.52 0.55 0.65 0.72 0.65 0.65 0.78 0.78 0.86 0.75 1.06 1.14 1.2
Cold Crushing Strength（Mpa） JIS R 2615 1.1 1.3 1.3 1.6 2 2.5 3 3 3.2 1.5 1.7 2.4 4 4.4 5.7 11.1
Test result
Thermal Conductivity       W/(m.K) at 600℃  JIS R2616 0．23≥ 0．24≥ 0．32≥ 0．32≥ 0．34≥ 0．36≥ 0．38≥ 0．26≥ 0．28≥ 0．37≥ 0．39≥ 0．42≥ 0．50≥ 0．50≥ 0．60≥ 0．68≥
Test result 0.2 0.21 0.25 0.25 0.26 0.35 0.37 0.22 0.26 0.33 0.33 0.37 0.41 0.44 0.52 0.64

 

 


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Company
Dongtai Hongda Heat Resistant Material Co., Ltd.
Dongtai Hongda Heat Resistant Material Co., Ltd. is China Mullite Insulation Brick Manufacturers and Wholesale JM Fire Bricks Suppliers dedicated to the research and development of high-grade insulating refractory products, specializing in the petrochemical, metallurgy, ceramics, new energy, electronics, mechanical heat treatment and other industries. It provides high-quality HJM series of insulating refractory products and amorphous castables.
Founded in 2008 with a registered capital of 20 million yuan, the company is located in Dongtai, Jiangsu Province, the home of China's refractory materials, with a beautiful environment and convenient transportation.
With a complete quality control and assurance system and in strict accordance with the American ASTM standard organization of production, the company has passed the ISO 9001:2015 quality certification in 2010, the ISO 14001:2015 environmental certification in 2019, the ISO 45001:2018 occupational health certification in 2022, achieving total quality management of the production process. We have a variety of domestic advanced manufacturing equipment, including automatic batching and molding lines, 1500 high-temperature tunnel kilns, 1700 shuttle kilns, machining equipment, product firing temperature range from 1200℃ to 1800℃, the current production capacity of 20,000 tons of insulation materials.
The company has the right to import and export agents around the world. Our products not only enjoy a high reputation in the country, but are also exported to Italy, Britain, Spain, South Korea, Japan, India, and other countries and regions by both domestic and foreign customers.
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Thermal insulation and high temperature resistance of Mullite Insulating Brick

As a high-performance thermal insulation material, Mullite Insulating Brick's thermal insulation and high temperature resistance properties are one of the important reasons why it is widely used in the industrial field.
Thermal insulation performance:
Unique structure:
Mullite Insulating Brick is mainly composed of Mullite phase, which has a unique crystal structure and low thermal conductivity. The Molite phase is formed at high temperatures, and the arrangement between alumina and silica in its structure slows down the conduction speed of heat particles, effectively reducing the overall thermal conductivity of the material.
Low thermal conductivity:
Since Mullite Insulating Brick contains a higher proportion of Mullite phase, its thermal conductivity is relatively low. Low thermal conductivity means that the insulation material does not conduct heat easily, thereby slowing down the transfer of heat in high-temperature equipment and providing good thermal insulation effect.
Stable thermal insulation performance:
Mullite Insulating Brick not only has excellent thermal insulation performance at low temperatures, but also maintains a relatively stable thermal insulation effect under high temperature conditions. This enables it to provide thermal insulation function stably for a long time in high-temperature industrial environments.
Adapt to diverse working conditions:
Due to its superior thermal insulation properties, Mullite Insulating Brick is suitable for various working conditions, including kilns and smelting furnaces with large temperature changes. Its stable thermal insulation performance enables the equipment to maintain stable working status under different temperature conditions.
High temperature resistance:
High melting point ingredients:
The main ingredients of Mullite Insulating Brick, alumina and silica, have relatively high melting points, allowing them to maintain structural stability at extremely high temperatures. This ensures that the insulation bricks are not easily softened, deformed or melted in high temperature environments.
Thermal expansion coefficient matching:
Mullite Insulating Brick's thermal expansion coefficient matches that of many metals and other refractory materials, reducing the potential for cracking and damage due to thermal expansion when temperatures change. This enables it to adapt to the cyclic heating and cooling processes of high-temperature equipment.
Thermal shock resistance:
Mullite Insulating Brick has good thermal shock resistance due to its unique structure and superior high temperature resistance. In high-temperature equipment, temperature fluctuations may cause thermal shock to materials, and Mullite Insulating Brick can relatively stably cope with such environmental changes.
Chemically inert:
Due to the chemical nature of its main ingredients, Mullite Insulating Brick exhibits high resistance to many chemical corrosive substances, allowing it to maintain stable chemical properties for a long time in high-temperature industrial environments.

Application fields of Mullite Insulating Brick

In today's high-temperature industrial environment, the demand for refractory materials is becoming increasingly urgent. Mullite Insulating Brick (Mulite Insulating Brick) has been widely used in many industries due to its excellent thermal insulation performance and high temperature resistance, providing reliable thermal insulation solutions for various high-temperature equipment.
Metal smelting field
In the field of metal smelting, Mullite Insulating Brick has become an ideal lining material for high-temperature smelting furnaces. Its high temperature resistance allows it to withstand the extreme temperatures of metal smelting, while its thermal insulation properties help improve smelting efficiency and reduce energy consumption. In addition, Mullite Insulating Brick is also widely used in manufacturing equipment such as crucibles to ensure long-term stable operation in high-temperature environments.
Industrial furnaces and kilns
In various types of industrial furnaces and kilns, the thermal insulation properties of Mullite Insulating Brick play a key role. As a thermal insulation layer and lining material, it effectively slows down heat conduction and improves the thermal efficiency of the equipment. In glass furnaces, Mullite Insulating Brick is an indispensable material, providing solid support for the high-temperature melting of glass materials.
Chemical production
In the chemical production process, the requirements of high-temperature reaction equipment pose higher challenges to the performance of materials. Mullite Insulating Brick, as a lining material, can resist high temperature and chemical attack and maintain stable operation of the equipment for a long time. Its application in petroleum refining units, especially in the lining of high-temperature cracking furnaces, provides a reliable solution for the petroleum industry.
Ceramics and pyrotechnics manufacturing
In ceramic manufacturing, Mullite Insulating Brick is the material of choice for ceramic kilns. Its thermal insulation properties help maintain a stable high-temperature sintering environment and ensure the quality of ceramic products. In addition, Mullite Insulating Brick also plays a role in explosives manufacturing equipment, and its high temperature resistance and chemical stability make it a safe choice in high temperature environments.
Iron industry
In the steel smelting process, Mullite Insulating Brick is widely used. As a lining material for steel-making furnaces, it can withstand the smelting process under high-temperature conditions, maintain structural stability, and has good heat insulation effects.
Power Industry
Power station boilers are one of the equipments in the power industry that require extremely high refractory materials. Mullite Insulating Brick is widely used in the lining of power station boilers. Its excellent thermal insulation properties help improve the thermal efficiency of the boiler and reduce energy consumption.