lightweight ultra-low conductivity mullite fire brick归档 - Ruitailianxin https://www.lianxinrefra.com/product-tag/lightweight-ultra-low-conductivity-mullite-fire-brick/ Refractory fire bricks manufacturer Fri, 12 Jun 2026 07:09:33 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.8 https://www.lianxinrefra.com/wp-content/uploads/2025/05/cropped-4443161fbf9c19781f72639f228a8d1-32x32.png lightweight ultra-low conductivity mullite fire brick归档 - Ruitailianxin https://www.lianxinrefra.com/product-tag/lightweight-ultra-low-conductivity-mullite-fire-brick/ 32 32 Lightweight Ultra-Low Conductivity Mullite Brick https://www.lianxinrefra.com/product/lightweight-ultra-low-conductivity-mullite-brick/ https://www.lianxinrefra.com/product/lightweight-ultra-low-conductivity-mullite-brick/#respond Wed, 10 Jun 2026 03:16:52 +0000 https://www.lianxinrefra.com/?post_type=product&p=4554 Lightweight ultra-low conductivity mullite bricks are a high-end energy-saving upgrade of ordinary lightweight mullite bricks. They are based on high-purity mullite (3Al₂O₃・2SiO₂) as the main crystalline phase and adopt a microporous closed-pore composite process to construct a nanoscale fine sealed pore structure. This achieves the triple advantages of lightweight and low conductivity, including lower thermal conductivity, lower bulk density, and lower heat storage. They are specifically designed for energy-saving retrofitting of high-end intermittent kilns and high-temperature continuous kilns and are the mainstream high-efficiency heat-insulating refractory material for industrial furnaces under the dual-carbon policy.

Lightweight Ultra-Low Conductivity Mullite Brick最先出现在Ruitailianxin。

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Product Description

Description of Lightweight Ultra-Low Conductivity Mullite Brick

Lightweight ultra-low conductivity mullite fire bricks are a high-end energy-saving upgrade of ordinary lightweight mullite bricks. They are based on high-purity mullite (3Al₂O₃・2SiO₂) as the main crystalline phase and adopt a microporous closed-pore composite process to construct a nanoscale fine sealed pore structure. This achieves the triple advantages of lightweight and low conductivity, including lower thermal conductivity, lower bulk density, and lower heat storage. 

Ruitai Lianxin lightweight mullite brick
Ruitai Lianxin lightweight mullite fire brick
Ruitai Lianxin lightweight mullite firebrick
Ruitai Lianxin lightweight mullite fire bricks
Ruitai Lianxin- lightweight mullite firebrick
Ruitai Lianxin lightweight mullite bricks
Ruitai Lianxin- lightweight mullite brick

Characteristics of Lightweight Ultra-Low Conductivity Mullite Refractory Brick

Exceptional Thermal Insulation and Outstanding Energy Savings

The closed micropores eliminate internal air convection, resulting in a 40-80°C reduction in furnace outer wall temperature for the same lining thickness, significantly reducing heat loss. The kiln insulation layer can be reduced by one-third, offering a clear advantage in scenarios with limited furnace size.

The high-purity mullite skeleton has an extremely low coefficient of thermal expansion, low high-temperature creep, and even lower re-firing shrinkage. Low-alumina grades can be used as backing, while high-alumina JM28L/30L grades can be directly used as the working surface lining, eliminating the need for a layer of heavy refractory bricks and simplifying the furnace lining structure.

The microporous structure buffers thermal stress, making it less prone to cracking under rapid heating and cooling. It provides long-term stability in neutral, weakly reducing, and weakly oxidizing atmospheres. The low-alkali, low-iron formula is suitable for white porcelain, lithium-ion battery anodes, and precision electronic sintering, with no product contamination.

 

The overall furnace lining weight is further reduced, and the manufacturing costs of the kiln trolley and steel structure are lowered; the bricks have high dimensional accuracy and can be cut into irregular shapes on site. Combined with ultra-low conductivity mullite refractory mortar, there are fewer mortar joints and better sealing.

Application of Lightweight Ultra-Low Conductivity Mullite Fire Brick

1. Ceramics & Electrical Porcelain Industry (Largest Usage): Roller kilns, shuttle kilns, pusher kilns (full lining, trolley insulation layer, kiln doors); low-iron, ultra-low conductivity models are preferred for white porcelain, glazed tiles, and special ceramics to prevent product yellowing; intermittent kilns offer the highest energy-saving benefits.

2. New Energy High-Temperature Sintering Kilns: Lithium-ion battery positive and negative electrode sintering furnaces, ceramic diaphragm kilns, graphitization furnace linings; high temperature control precision required, frequent temperature rises and falls.

3. Glass & Optical Glass Industry: Annealing kilns, tin bath insulation layers, small glass experimental kilns; resists alkali metal fume volatilization corrosion.

4. Petrochemical & High-End Heat Treatment Furnaces: Ethylene cracking furnaces, precision carburizing furnaces, stainless steel bright annealing furnaces, laboratory high-temperature electric furnaces; stable temperature control, reduced heat loss.

5.Metallurgical Small High-Temperature Furnaces: Forging trolley furnaces, aluminum annealing furnaces, small hot blast furnace back lining + hot face integrated lining.

Physical and Chemical Index

Item Lightweight Ultra-Low Conductivity Mullite Brick Type I Lightweight Ultra-Low Conductivity Mullite Brick Type II
Bulk Density (g/cm2) ≤2.5 ≤2.3
Compressive Strength at Room Temperature (MPa) 60 55
Softening Temperature under Load (T0.6, °C) 1500 1430
Thermal Shock Stability (1100°C water cooling, cycles) 9 8
Thermal Conductivity (1000°C, W/m.k) 1.5 1.4
Apparent Porosity (%) 19 17

Advantages of Lightweight Ultra-Low Conductivity Mullite Fire Bricks

Lightweight ultra-low conductivity mullite refractory bricks possess high strength, high wear resistance, high corrosion resistance, high load-bearing capacity, low density, and excellent thermal shock resistance, fully meeting the production process requirements of large and medium-sized cement rotary kilns. Their performance surpasses that of similar products. Taking a φ4.8-meter rotary kiln with a 40-meter bricklaying length as an example, the economic benefits are analyzed as follows:

The kiln’s outer surface temperature decreases by 80-100°C, reducing fuel consumption by 1 kg per ton of clinker. This translates to a reduction of 1500 tons of standard coal consumption annually, saving approximately 1.1 million yuan.

Saving 1500 tons of coal annually reduces carbon dioxide emissions by 4300 tons, as well as sulfur dioxide, nitrogen oxides, and other harmful substances.

For the same 40-meter masonry section, this product is approximately 30 tons lighter than conventional products. The average operating current of the main drive motor can be reduced by 30A. Based on a 660V main drive motor voltage, this saves 19.8 kWh per hour, or 156,800 kWh per year. At an average industrial electricity price of 0.6 yuan/kWh, this translates to annual electricity cost savings of 94,000 yuan.

For the same volume of masonry, this product is 10% lighter than silicon mullite bricks and 20% lighter than magnesium aluminate spinel bricks. For the same 40-meter masonry section, silicon mullite bricks require 310 tons, while lightweight ultra-low conductivity mullite bricks only require 279 tons, saving 31 tons and reducing procurement costs by approximately 150,000 yuan.

The product’s lightweight design and low thermal conductivity reduce tire wear under pressure, effectively extending the rate of deformation and oxidation of the cylinder under high temperatures, thus extending the service life of the support rollers and the cylinder itself.

Company Profile

About Ruitai Lianxin

RuiTai LianXin factory

Henan Ruitai Lianxin Refractory Materials Co., ltd is a modern R&D-centered refractories manufacturing enterprise integrated with refractories sales and marketing, furnace engineering construction, recycling and sales of waste refractories as well as refractory raw material, technology and goods import and export, and technical services.

Well-equipped and technologically advanced, ISO/QHSE-certified management underpins a product line of ordinary, medium and high-grade magnesia series brick, magnesia-chrome brick, magnesia-alumina spinel brick, magnesia-alumina- chrome basic brick, lightweight brick, clay brick, high alumina brick, corundum brick, zircon series brick, silicon carbide brick and insulation materials, monolithic castable, ramming mix, plastic, etc.

We manufacture more than 70 categories of refractory bricks with more than a thousand specifications and models, which are widely used in high-temperature kiln/furnace, non-ferrous metallurgical smelter, cement lime rotary kiln, glass-melting furnace, electric power, petrochemical hazard waste incinerator etc.

Factory Show

As a 20 refractory bricks manufacturer, we have our own factory, professional machinery and equipments, strong technical team, complete delivery process, perfect after-sales service.

lianxin factory
lianxin-equipment
magnesia chrome bricks
magnesia chrome refractory bricks
lianxin-kiln construction
converter

Test Equipment

Ruitai Lianxin has innovative technology and advanced experimental equipment to ensure that every fire brick has the best quality and we are responsible for every customer.

Ruitai Lianxin experimental equipment
Ruitai Lianxin experimental equipments
Ruitai Lianxin testing equipment
Ruitai Lianxin testing equipments

Production Process

We have a complete production process, from raw materials to molding, and then to finished refractory materials. Each step is operated and inspected by dedicated personnel to ensure the high quality of the products.

Raw Materials

Raw Materials

Raw Materials Mixing and Tempering

Mixing and Tempering

Refractory Bricks Forming

Forming

Refractory Bricks Drying

Drying

Refractory Bricks Sintering

Sintering

Refractory Bricks Selecting

Selecting

Refractory Bricks Packing

Packing

Refractory Bricks Delivery

Shipping

Quality Control

After the refractory bricks are manufactured, we need to undergo professional testing and inspection to ensure that each high-quality refractory brick is delivered to the customer, so that the customer can rest assured.

LX Quality Control
Quality Control
Lianxin Quality Control
zzlx Quality Control

Packaging & Shipping

Our refractory fire bricks are delivered to customers in the shortest possible time by land, sea or air.

lianxin-packaging
lianxin-factory
lianxin-packaging
lianxin-shipping
lianxin-shipping
Refractory Bricks Delivery

Company Advantages

Customer Cases

As a fire bricks world-renowned exporter, Ruitai Lianxin has expanded our business scope to the world, providing high quality fire bricks to customers worldwide. We have gained loyal customers all over the world, reached cooperation again and again, and become the first choice of global customers.

Ruitai Lianxin- Indian customer

Indian customer

Ruitai Lianxin Uzbekistan customers

Uzbekistan customer

Ruitai Vietnamese customer

Vietnamese customer

Kazakhstan customers

Kazakhstan customer

Egyptian customer

Egyptian customer

converter

Kiln construction

Company Certification

We are a reliable manufacturer and supplier of refractory bricks, with a number of certificates and patents to protect your kiln, and our professional team of experienced engineers and technicians are committed to providing you with excellent service.

lianxin company certificates

Cooperation Partners

As a refractory fire bricks source manufacturer for 20 years, we use the best materials and the most cutting-edge technology to carefully make firebricks, our fire bricks have all kinds of types  to meet various application needs, has won many reliable cooperation partners.

BEIJING LIRR
CHINA GOLD
CNMC
ENFI
Jind Gold And Lead
LB GROUP
LTGF
GROUP
MINMETALS
MS
New Chun Xing
XIN JIN YE
yghs
YHCC
YONGNING GOLD$LEAD
Ysm
ZJYW

Questions & Answers

Q1: Could I get a sample before placing an order?

A1: Yes. A sample as per your requirement can be prepared for approval.

A2:We can give you reply with quotation quickly if you kindly send the inquiry with following factors: dimension (length*width*thickness), service temperature, application and quantity.

We’d be appreciated if you can also provide the density and content.

A3: Yes, but only for regular size.

A4: Our experts can recommend you the suitable way based on the quantity and your budget. Normally ,it is by sea.

A5: Yes, you will get our lowest price without quality compromise along with our professional service.As we are working with mainly players in Europe, Asia, America and Afraic.

A6:  1.Chemical inspection is performed during Raw material, production and finished refractory materials.
       2.Physical test is performed for finished refractory bricks.

A7: We are truly a refractory materials manufacturer, Ruitai Lianxin not only can provide the high quality refractory materials with the best price, but also can offer the best pre-sale service and after-service.

A8: Yes! We have a professional R&D team, and advanced QC inspection equipments to ensure the accurate size and shape for you.

Contact Us

Lightweight Ultra-Low Conductivity Mullite Brick最先出现在Ruitailianxin。

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