If you’re searching for high-performance insulation materials for medium-high temperature industrial furnaces, you’ve likely encountered the term “JM28 mullite insulation brick”. As a professional refractory material widely used in ceramic, glass, metallurgy and chemical industries, JM28 mullite insulation brick is favored for its excellent thermal insulation, energy-saving effect and high-temperature stability. This article will comprehensively answer what JM28 mullite insulation brick is, interpret its model meaning, detail technical parameters, core advantages, applicable scenarios, selection methods and procurement information, helping you quickly establish a comprehensive understanding and make informed purchasing decisions.
JM28 mullite insulation brick is a high-performance lightweight refractory material based on mullite (3Al₂O₃·2SiO₂) as the main crystalline phase. It is manufactured through processes such as high-purity raw material proportioning, pore-forming, molding and high-temperature calcination, forming a lightweight porous structure with excellent thermal insulation performance. Unlike ordinary insulation bricks, JM28 mullite insulation brick has optimized chemical composition and physical structure, which can maintain stable performance under medium-high temperature conditions, balancing insulation effect, structural strength and service life.
It contains no harmful substances such as asbestos, meets environmental protection requirements of various countries, and is an ideal insulation material for energy-saving transformation of industrial furnaces and high-temperature equipment insulation.
High Temperature Insulation: Low thermal conductivity, effective reduction of furnace heat loss
Energy Saving: Reduce industrial furnace energy consumption by 18-25% after application
Long Service Life: Stable mullite phase structure, service life increased by 30%+ compared with ordinary insulation bricks
The “JM28” in JM28 mullite insulation brick is a common grading standard in the mullite insulation brick industry, and each part has a clear meaning, which helps users quickly judge the product’s positioning and performance:
“JM” is the abbreviation of “mullite” in Chinese pinyin. This prefix directly indicates that the product is based on mullite as the core crystalline phase. Mullite (chemical formula: 3Al₂O₃·2SiO₂) is a high-performance refractory material with excellent high-temperature stability, thermal shock resistance and chemical corrosion resistance, which is the key to ensuring the high-temperature performance of JM28 mullite insulation brick.
“28” refers to the grade of the product, which is closely related to its bulk density (around 280kg/m³). In the mullite insulation brick grading system, the number usually corresponds to the bulk density range of the product. This grading helps users quickly distinguish the product’s structural density and strength level:
JM23 mullite insulation brick: Bulk density around 230kg/m³, lighter weight, better insulation effect but lower strength
JM28 mullite insulation brick: Bulk density around 280kg/m³, balancing insulation effect and structural strength, medium-density product
JM30 mullite insulation brick: Bulk density around 300kg/m³, higher strength but slightly lower insulation effect and higher cost
In summary, JM28 mullite insulation brick is a medium-density mullite-based insulation material that balances insulation performance, structural strength and cost-effectiveness, suitable for most medium-high temperature industrial furnace insulation scenarios.
Technical parameters are the core basis for selecting JM28 mullite insulation brick. The following parameters are tested in strict accordance with ASTM/ISO/GB standards, and the correlation between parameters, performance and working conditions is explained in detail to help you accurately match your needs. We support custom sizes and performance optimization according to furnace design, working temperature and insulation requirements. MOQ for customization: 300pcs.
|
Parameter |
Value Range |
Unit |
Test Standard |
Performance Correlation |
|---|---|---|---|---|
|
Al₂O₃ Content |
≥42–48% |
% |
ASTM C1366 |
Guarantee mullite phase stability, enhance high-temperature resistance and structural strength |
|
SiO₂ Content |
45–50% |
% |
ASTM C1366 |
Optimize mullite phase formation, improve thermal shock stability and sintering performance |
|
Classification Temperature |
1400–1500℃ |
℃ |
ASTM C1171 |
Adapt to medium-high temperature furnace insulation, determine the maximum safe use temperature range |
|
Working Temperature |
≤1350–1450℃ |
℃ |
ASTM C1171 |
Safe operation under long-term high-temperature conditions, suitable for continuous operation of industrial furnaces |
|
Bulk Density |
280–350 |
kg/m³ |
ASTM C20 |
Lightweight design, reduce furnace weight load; balance insulation effect and structural strength |
|
Thermal Conductivity (at 800℃) |
≤0.12–0.18 |
W/(m·k) |
ASTM C518 |
Excellent insulation performance, reduce heat loss and energy consumption of the furnace |
|
Cold Crushing Strength |
≥1.5–3.0 |
MPa |
ASTM C133 |
Resist mechanical impact during installation and use, ensure structural integrity |
|
Permanent Linear Change (1400℃×24h) |
≤±1.5% |
% |
ASTM C1171 |
Stable structure, avoid deformation under high temperature, ensure long-term use effect |
|
Fe₂O₃ Content |
≤1.0% |
% |
ASTM C1366 |
Low impurity content, avoid affecting high-temperature performance and product purity |
|
Standard Size |
230×114×65 / 230×114×75 |
mm |
DIN EN 993 |
Universal size for industrial furnaces; custom sizes available |
Supplementary Note: We support custom sizes and performance optimization of JM28 mullite insulation bricks according to your furnace design, working temperature and insulation requirements. MOQ for customization: 300pcs.
JM28 mullite insulation brick stands out in the medium-high temperature insulation material market due to its four core advantages. Each advantage is supported by professional technical principles and verified by actual application data, bringing tangible economic benefits to users:
Advantage Feature: Low thermal conductivity (≤0.18W/(m·k) at 800℃) and lightweight porous structure, with closed pores accounting for more than 60% of the total pores.
Technical Principle: The stable mullite phase forms a three-dimensional skeleton structure, and the closed pores inside the brick body block the heat transfer path (conduction and convection heat transfer). At the same time, the low bulk density reduces the heat storage capacity of the brick body, further improving the insulation effect.
Industry Value: Reduce furnace heat loss by 18-25%, significantly lower energy consumption (natural gas, electricity, coal) and operation costs of industrial furnaces.
Data Case: A large Italian ceramic factory applied JM28 mullite insulation brick for the insulation layer transformation of tunnel kilns. After transformation, the monthly natural gas consumption decreased by 22%, saving about 18,000 cubic meters of natural gas and reducing energy costs by 200,000 euros annually.
Advantage Feature: Low linear expansion coefficient (≤5.5×10⁻⁶/℃), permanent linear change ≤±1.5% (1400℃×24h), no obvious cracking or peeling after multiple temperature changes.
Technical Principle: The optimized Al₂O₃-SiO₂ ratio ensures uniform distribution of mullite phase in the brick body. Mullite has excellent thermal shock resistance, and the porous structure can absorb thermal stress generated by temperature changes, avoiding brick body damage.
Industry Value: Adapt to the frequent temperature change working conditions of industrial furnaces (such as heat treatment furnaces, annealing furnaces), avoid insulation layer failure caused by brick cracking, and extend the service life of the furnace by 30%+.
Data Case: After 30 thermal shock cycle tests (1100℃→20℃, rapid cooling), the JM28 mullite insulation brick had no obvious cracks, and the compressive strength remained above 85% of the original value.
Advantage Feature: Adopt high-purity raw materials (alumina, silica), low impurity content (Fe₂O₃≤1.0%), no asbestos, no heavy metals and other harmful substances.
Technical Principle: Strict raw material screening (purity ≥99%) and advanced calcination process (1450-1500℃) effectively remove harmful impurities and volatile components, ensuring product purity and environmental performance.
Industry Value: Meet the environmental protection standards of the European Union, the United States, Japan and other countries (such as CE, SGS certification), avoid pollution to processed products (such as ceramics, glass) and the production environment, and help enterprises pass environmental protection inspections.
Advantage Feature: Lightweight (bulk density 280-350kg/m³), easy to cut and process, simple construction process; long service life, low replacement frequency.
Industry Value: Reduce the labor intensity of construction workers, shorten the construction period by 15-20%, and reduce construction costs; the long service life reduces the frequency of insulation layer replacement and maintenance costs, and the comprehensive cost-effectiveness is 40% higher than that of ordinary insulation materials.
Data Case: A 100m³ glass furnace insulation project using JM28 mullite insulation brick shortened the construction period by 3 days compared with traditional insulation bricks, and the one-time investment recovery period was only 8 months.
JM28 mullite insulation brick is widely used in medium-high temperature industrial furnaces and high-temperature equipment in ceramic, glass, metallurgy, chemical and other industries due to its excellent comprehensive performance. The following are the core application scenarios, applicable parts and application values:
Applicable Parts: Ceramic tunnel kiln insulation layer, roller kiln top and side wall insulation, shuttle kiln lining and insulation layer, kiln car insulation board.
Working Conditions: Long-term working temperature 1200-1350℃, small temperature fluctuation, no strong mechanical impact.
Application Value: Ensure uniform temperature inside the kiln, improve the qualification rate of ceramic products (by 3-5%); reduce heat loss, save energy consumption of the kiln; lightweight design reduces the load of the kiln body.
Applicable Parts: Glass melting furnace insulation layer, regenerator insulation, flue insulation, glass annealing furnace lining.
Working Conditions: High temperature 1350-1450℃, long-term continuous operation, high requirements for temperature stability.
Application Value: Stable insulation performance ensures the temperature stability of the melting furnace, improves the quality of glass products; reduces the energy consumption of the melting furnace, and the annual energy cost can be saved by 200,000 US dollars for a single furnace; extends the service life of the furnace.
Applicable Parts: Heat treatment furnace insulation layer, annealing furnace lining, metal quenching furnace insulation, galvanizing furnace insulation layer.
Working Conditions: Working temperature 1000-1300℃, frequent temperature changes, certain mechanical impact during workpiece loading and unloading.
Application Value: Good thermal shock resistance adapts to frequent temperature changes, ensuring the heat treatment effect of metals; excellent insulation performance reduces energy consumption; sufficient structural strength resists mechanical impact.
Applicable Parts: Chemical reactor insulation layer, high-temperature pipeline insulation, catalyst regeneration furnace lining, chemical roasting furnace insulation.
Working Conditions: High temperature, corrosive gas environment (such as sulfur dioxide, nitrogen oxides), long-term continuous operation.
Application Value: Good chemical corrosion resistance ensures stable performance in corrosive environments; reliable insulation performance ensures safe operation of equipment and reduces heat loss.
Applicable Scenarios: High-temperature experimental furnace insulation (laboratories, research institutes), incinerator insulation layer, building fireproof insulation (special high-temperature areas), garbage treatment equipment high-temperature insulation.
When selecting insulation materials for industrial furnaces, it is necessary to comprehensively consider working temperature, mechanical impact, insulation effect, cost and other factors. The following compares JM28 mullite insulation brick with common similar products to help you make accurate selections:
|
Product Type |
Advantages |
Disadvantages |
Applicable Scenarios |
Comparison with JM28 Mullite Insulation Brick |
|---|---|---|---|---|
|
JM23 Mullite Insulation Brick |
Lighter weight, better insulation effect, lower cost |
Lower strength, poor structural stability, not suitable for mechanical impact |
Low-temperature insulation (≤1200℃), no mechanical impact, short-term use |
JM28 has higher strength and better high-temperature stability, suitable for medium-high temperature (1200-1450℃) scenes with long-term operation |
|
JM30 Mullite Insulation Brick |
Higher strength, good structural stability, suitable for mechanical impact |
Heavier weight, slightly lower insulation effect, higher cost (15-20% higher than JM28) |
High-temperature scenes (≤1500℃) with mechanical impact, high-strength requirements |
JM28 balances insulation effect and cost, more cost-effective for general medium-high temperature scenes without strong mechanical impact |
|
Ceramic Fiber Blanket |
Lightweight, flexible, easy to install, suitable for irregular shape equipment |
Poor compressive strength, easy to age at high temperature (service life ≤3 years), easy to produce dust pollution |
Temporary insulation, irregular shape equipment insulation, low mechanical impact scenes |
JM28 has longer service life (≥8 years) and better structural stability, suitable for long-term continuous operation scenes; no dust pollution, more environmentally friendly |
|
Perlite Insulation Brick |
Low cost, lightweight, easy to process |
Low high-temperature resistance (≤1000℃), poor stability, easy to decompose and shrink at high temperature |
Low-temperature insulation (≤900℃), building insulation, non-industrial high-temperature scenes |
JM28 has higher high-temperature resistance and better insulation stability, suitable for industrial medium-high temperature (1200-1450℃) scenes |
When selecting insulation materials, priority should be given to the following four core dimensions:
Working Temperature: For medium-high temperature (1200-1450℃) long-term continuous operation, JM28 mullite insulation brick is the optimal choice; for temperature <1200℃, JM23 can be selected to save cost; for temperature >1450℃ with high strength requirements, JM30 is recommended.
Mechanical Impact: If there is strong mechanical impact (such as workpiece loading and unloading), JM30 or other high-strength insulation materials should be selected; for general scenes without strong impact, JM28 is cost-effective.
Insulation Effect Requirement: For high insulation effect requirements (such as energy-saving transformation projects), JM28 or JM23 can be selected; JM28 is more suitable for balancing insulation and strength.
Cost Budget: JM28 has higher comprehensive cost-effectiveness; if the budget is limited and the temperature is low, JM23 or perlite insulation brick can be selected; if the budget is sufficient and the strength requirement is high, JM30 can be selected.
Conclusion: For most medium-high temperature (1200-1450℃) industrial furnaces with long-term continuous operation (such as ceramic tunnel kilns, glass melting furnaces, heat treatment furnaces), JM28 mullite insulation brick is the most cost-effective insulation material due to its balanced performance of insulation, strength, service life and cost.
As a professional JM28 mullite insulation brick manufacturer, we adhere to strict production standards and quality control systems to ensure the stability and reliability of each batch of products. Our production strength and quality assurance capabilities have been recognized by customers in more than 50 countries around the world.
High-purity raw material screening: Select high-purity alumina (Al₂O₃≥99%) and silica (SiO₂≥98%) as raw materials, and strictly inspect impurity content (Fe₂O₃≤1.0%).
Proportioning and mixing: Use automatic batching equipment to accurately control the proportion of raw materials, add environmentally friendly pore-forming agents, and mix uniformly through wet mixing technology.
Foaming or pore-forming: Adopt advanced foaming technology to form uniform closed pores, ensuring the insulation performance and structural strength of the brick body.
Molding: Use hydraulic press for molding, control molding pressure accurately to ensure the density uniformity of the brick body.
Drying: Use staged drying technology to slowly remove moisture in the brick body, avoid cracking caused by rapid drying.
High-temperature calcination: Calcinate at 1450-1500℃ in a tunnel kiln to form a stable mullite phase structure, improving the high-temperature performance of the product.
Quality inspection: Conduct comprehensive performance testing on finished products, and unqualified products are eliminated.
Packaging and delivery: Use export-standard packaging to ensure product safety during transportation.
Raw material inspection: Use XRF analyzer to test the chemical composition of raw materials, and use particle size analyzer to test the particle size distribution, ensuring raw material quality meets requirements.
Process inspection: Monitor key parameters such as mixing uniformity, molding density and drying degree in real time, and adjust production parameters in time to ensure process stability.
Finished product inspection: Test thermal conductivity, compressive strength, permanent linear change and other performance parameters according to ASTM/ISO standards, and provide a detailed quality inspection report for each batch.
Our JM28 mullite insulation bricks have passed ISO 9001:2015 quality management system certification, ASTM international standard certification, CE certification (for European market) and SGS environmental protection certification, which can meet the import requirements of various countries and regions.
We are equipped with professional testing equipment, including thermal conductivity tester, high-temperature furnace (up to 1800℃), compressive strength tester, chemical composition analyzer (XRF), permanent linear change tester, etc., to ensure the accuracy and reliability of test data.
We have a technical team with 15+ years of mullite insulation brick R&D and production experience, including 40+ professional engineers. The team can provide users with one-stop services such as technical consultation, customized selection, on-site installation guidance and after-sales technical support, ensuring that the product exerts the best performance in the actual application process.
Our JM28 mullite insulation bricks have been widely used in more than 50 countries and regions around the world, and have established long-term cooperative relationships with many well-known enterprises in the ceramic, glass, metallurgy and chemical industries. The following are two typical customer cases:
Cooperation Content: The customer is a well-known ceramic tile manufacturer in Italy, with 6 tunnel kilns for ceramic tile firing. The original insulation material had poor insulation effect and high energy consumption. We provided 500 tons of JM28 mullite insulation brick for the insulation layer transformation of the tunnel kilns, and sent technical engineers to provide on-site installation guidance.
Application Effect: After the transformation, the heat loss of the tunnel kiln was reduced by 22%, the monthly natural gas consumption was saved by 18,000 cubic meters, and the annual energy cost was reduced by about 200,000 euros. At the same time, the temperature inside the kiln was more uniform, and the qualification rate of ceramic tiles was improved by 3%.
Customer Feedback: “JM28 mullite insulation brick has excellent insulation performance, which significantly reduces our energy costs. The technical support team provided professional selection and installation guidance, and the cooperation was very smooth. We have signed a long-term supply contract and will continue to use this product for subsequent kiln transformation.”
Cooperation Content: The customer is a large glass bottle manufacturer in Hebei, China, with 2 glass melting furnaces (working temperature 1400℃). We have been supplying JM28 mullite insulation brick for the insulation layer of the melting furnaces for a long time, with a monthly supply of 80 tons.
Application Effect: The insulation layer of the glass melting furnace remained stable for a long time, and the furnace service life was extended from the original 5 years to 6.5 years. The annual energy cost was saved by about 200,000 US dollars, and there was no quality problem such as insulation layer cracking or deformation during the use period.
Customer Feedback: “The quality of JM28 brick is stable and reliable, and the delivery is on time. It has become our long-term cooperative product for furnace insulation. The after-sales service is also very thoughtful, and the technical team can quickly respond to our questions about product use.”
Q1: What is the maximum working temperature of JM28 mullite insulation brick? A1: The maximum working temperature of JM28 mullite insulation brick is 1350-1450℃, and the classification temperature is 1400-1500℃. It can operate stably for a long time under the working temperature of ≤1450℃. For higher temperature scenes, we recommend JM30 mullite insulation brick.
Q2: Can JM28 mullite insulation brick be customized? A2: Yes! We support customization of size, bulk density and performance parameters of JM28 mullite insulation brick according to your specific needs (furnace design, working temperature, insulation requirements). The minimum order quantity for customization is 300pcs. Please provide drawings or detailed requirements, and our technical team will provide a customized solution within 48 hours.
Q3: How to distinguish JM28, JM23 and JM30 mullite insulation bricks? A3: The main difference lies in bulk density and performance: JM23 has a bulk density of about 230kg/m³, which is lightweight but low in strength; JM28 has a bulk density of about 280kg/m³, balancing insulation effect and strength; JM30 has a bulk density of about 300kg/m³, which is high in strength but slightly lower in insulation effect. You can choose according to your working temperature and strength requirements.
Q4: What certifications do your JM28 mullite insulation bricks have? A4: Our JM28 mullite insulation bricks have passed ISO 9001:2015, ASTM, CE and SGS certifications, and can provide complete quality inspection reports and certification documents to meet the import requirements of various countries (such as the European Union, the United States, Southeast Asia).
Q5: What is the delivery time and payment terms? A5: For standard size products, the delivery time is 7-15 working days; for customized products, it is 20-30 working days. Payment terms: T/T (30% deposit, 70% against B/L), L/C is acceptable for large orders (amount ≥50,000 US dollars).
Q6: Do you provide samples and technical data sheets? A6: Yes! We provide 1-3pcs of free samples (freight collect), and can send samples within 3 working days after confirming the request. We also provide detailed technical data sheets (including parameters, test reports, application cases, installation guides), which can be downloaded for free through the official website or obtained by contacting our sales team.
JM28 Insulation Brick, made of high-quality raw materials, is a top-tier thermal insulation solution designed to offer exceptional performance in high-temperature environments. Known for its outstanding thermal insulation properties, JM28 is ideal for use in furnaces, kilns, boilers, and other high-temperature industrial applications. With its excellent insulating qualities, low thermal conductivity, and robust physical properties, JM28 Insulation Brick provides significant benefits to industries aiming to improve energy efficiency, reduce operational costs, and increase the lifespan of high-temperature equipment. In this product description, we will explore the key features, benefits, technical specifications, and ideal applications of JM28 Insulation Brick. Whether you’re in steel manufacturing, cement production, or any other high-heat industry, JM28 is designed to meet your thermal insulation needs.
Mullite lightweight insulation brick is a high-quality insulation material.
Corundum - mullite brick refers to high purity or pure raw materials made of refractory products.
Corundum - mullite brick refers to high purity or pure raw materials made of refractory products.
High-Temperature Resistance: Withstands up to 1350°C continuous operation. Energy Efficiency: Low thermal conductivity reduces heat loss. Lightweight & Durable: Easy to handle and long-lasting. Wide Application: Steel, glass, ceramic, chemical, and energy industries.
