Description of Mullite Insulation Brick:

Rongsheng High Quality Mullite Insulating Brick Jm23 Jm26 Jm28 Jm30 Mullite Bricks have high refractoriness, can directly contact the flame, and have the characteristics of light weight, high strength, low thermal conductivity, good thermal shock resistance and remarkable energy saving effect and also long service life. For various industrial kilns & furnaces, it is a kind of essential refractory for energy saving and temperature preservation.

Mullite Insulation Brick Application:

1. Metallurgical industry used industrial furnace and kilns

2. Ceramic industry used industrial furnace and kilns

3. Chemical industry used industrial furnace and kilns

4. Machinery industry used industrial furnace and kilns

5. Different types of furnaces and environments are available

Technical Parameter of Mullite Insulation Brick:

Item Index
JM23 JM25 JM26 JM27
Al2O3  % ≥40 ≥50 ≥55 ≥60
Fe2O3  % ≤1.0 ≤1.0 ≤0.9 ≤0.8
Apparent porosity  % ≤0.55 ≤0.80 ≤0.85 ≤0.9
Cold Crush Strength  MPa ≥1.0 ≥1.5 ≥2.0 ≥2.5
Permanent Linear Change Rate % 1230℃×12h 1350℃×12h 1400℃×12h 1450℃×12h
Thermal Conductivity


200±25℃ ≤0.18 ≤0.26 ≤0.28 ≤0.32
350±25℃ ≤0.20 ≤0.28 ≤0.30 ≤0.32
600±25℃ ≤0.22 ≤0.30 ≤0.33 ≤0.36
0.05MPa Refractoriness Under LoadT0.5 ℃ ≥1080 ≥1200 ≥1250 ≥1300


Item Index
JM28 JM30 JM32
Al2O3  % ≥65 ≥70 ≥77
Fe2O3  % ≤0.7 ≤0.6 ≤0.5
Apparent porosity  % ≤0.95 ≤1.05 ≤1.35
Cold Crush Strength  MPa ≥2.5 ≥3.0 ≥3.5
Permanent Linear Change Rate % 1510℃×12h 1620℃×12h 1730℃×12h
Thermal Conductivity W/(m·K) 200±25℃ ≤0.35 ≤0.42 ≤0.56
350±25℃ ≤0.37 ≤0.44 ≤0.60
600±25℃ ≤0.39 ≤0.46 ≤0.64
0.05MPa Refractoriness Under Load T0.5 ℃ ≥1360 ≥1470 ≥1570


Why choose us?

1.Abundant Experience. Rongsheng Group have over 20 years experience in the refractory industry and we have a deep understanding of the materials and applications we work with. We can provide expert advice and guidance to help customers find the best solutions for their needs.

2.Quality products. We pride ourselves on providing high-quality refractory products that are made to last. Our materials are carefully sourced and tested to ensure they meet our strict standards.

3.Competitive Price. We offer competitive pricie on all of our products without sacrificing quality and make the products competitive in your market.

4.Customization. We understand that every customer is unique, which is why we offer customized solutions tailored to their specific requirements. Whether it’s a custom shape or size, we can work with customers to create the ideal product for their application.

5.Safety. We take safety seriously and ensure that all of our products meet safety standards. Safty packing, prompt delivery time, and excellent after-sales services.

6.Large stocks. With a large stock of products on hand, we can better serve our customers, save money, and gain a competitive edge in their industry.

7. Overall solutions. We offer optimal and comprehensive solutions to supply the necessary refractory material for your high temperature kiln.

8.Long-term relationships. We believe in building long-term relationships with our customers based on trust and mutual benefit. We are committed to providing ongoing support and service to ensure customer satisfaction. Rongsheng Refractory can be used in many fields of steel, nonferrous metals, glass, cement, ceramic, petrochemical, machinery, boiler, light, and power industries. What’s more, Industrial distributors, refractory contractors, sales agents, trading companies, and refractory consultants can all benefit from promoting and selling our top-of-the-line refractory products. With a focus on durability, longevity, and performance, our products are designed to exceed your expectations and provide your customers with the best possible results.

So choosing us is the right choice for you.If you are interested in our products or if you have any question, pls feel free to contact us at any time. We will reply as soon as possible.

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