Description of JM23 JM26 JM28 JM30 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.

Our Advantage of JM23 JM26 JM28 JM30 Mullite Insulation Brick

1.Timely responseto your inquiry, multiple choice recommendations based on your demand, quickly respond mails and provide solutions.
2.Free sample testing available. Sample and trial order are accepted for the quality evaluation
3.Strict quality control. Arrange production on time and control quality strictly.
4.Shorter delivery time. Book the earliest vessel or plane to guarantee the delivery time.
5.Professional Services. Provide all the detailed news and pictures from order to delivery,offer relative export documents and original certificate if needed;warm annd considerable after-sale service.

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

About Rongsheng Refractory Factory

As professional refractory material supplier and manufacturer, Rongsheng Refractory Factory is located in Xinmi city, the “Capital of Refractory” in China. We specialize in refractory products for nearly 15 years, covering a full range of shaped and unshaped refractory products, such as High Alumina Series Bricks, Mullite Bricks, Corundum Series Bricks, Silica Series Bricks, Andalusite Bricks, Magnesia Series Brick, Carborundum Brick, Insulating Series Brick, Insulating and Dense Castables, also other related products for more sophisticated applications.

280 workers, 20000 square meter workshop, 30 years experience, CE & ISO9001 / 2008 certificated, biggest raw refractory material original area in China, this is how we keep good quality and reliable cooperation for global valued customers. After nearly 30 years of innovation, Rongsheng Refractory has developed into a large-scale group enterprise known as a collection of science, industry and trade all over the world. Cooperate with many universities to establish research and development center, professional customer service and technology continuous tracking, can provide customers with differentiated, serialized, customized refractory products and services.
Believe that you will be the same as the customers which are from more than 100 countries and regions all over the world, and think it is so wise to choose Rongsheng Refractory, Rongsheng is here for you at any time. Welcome your inquiry.

Rongsheng Refractory Factory

Certificates of Rongsheng Refractory Group

Rongsheng Group has a number of international certifications, such as,ISO9001/ISO14001/OHSAS18001/CE/SGS. Besides, Rongsheng Refractory also has a number of domestic certifications.

Professional Sales Team

Engineering Case

Customer Visit

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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