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Lightweight Mullite Castable

Lightweight mullite castable lightweight yet high strength, energy efficient in heat preservation and stable. Used for linings of industrial kilns, thermal equipment and flues.

Al₂O₃:≥45%
Bulk Density:1.-1.8g/cm³
Operating Temp:1300-1500℃
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Lightweight Mullite Castable
Description
Technical Data
Application
Case
Related Products
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Description of Lightweight Mullite Castable

The ZKM series lightweight mullite castable is formulated with porous mullite as the aggregate, combined with materials such as pure calcium aluminate cement, mullite micro - powder, and alumina micro - powder. It is a refractory casting material suitable for medium - to - high - temperature environments (1000 - 1500℃).

Features and Properties

  1. Refractory Performance: It can be stably used in the environment of 1000-1500℃ for a long time.
  2. Mechanical Properties: The compressive strength at normal temperature is 4-25MPa, and it has excellent flexural strength.
  3. Thermal Properties: It can resist rapid heating and cooling, and the linear change rate at high temperature is ≤ ±1.0%.
  4. Chemical Properties: It resists metal corrosion and has a uniform and stable composition.

Technical Data of Lightweight Mullite Castable

Project Index ZKM - 1.8 ZKM - 1.5 ZKM - 1.2
Aggregate Lightweight Mullite Aggregate Lightweight Mullite Aggregate Lightweight Mullite Aggregate
Al₂O₃ /% ≥55 ≥50 ≥45
SiO₂ /% ≤40 ≤45 ≤50
Maximum service temperature /℃ 1500 1400 1300
Bulk density /g/cm³ After drying at 110℃×24h 1.8 ± 0.1 1.5 ± 0.1 1.2 ± 0.1
Cold compressive strength /MPa ≥ 110℃×24h 10 5 4
1400℃×3h 25 (at 1350℃) 20 (at 1300℃) 8 (at 1200℃)
Linear change after firing /% ≤ 1400℃×3h ±1.0 (at 1350℃) ±1.0 (at 1300℃) ±1.0 (at 1200℃)
Thermal conductivity /W/m·K ≤ 500℃ 0.45 0.40 0.30
800℃ 0.55 0.50 0.35

Applications of Lightweight Mullite Castable

  1.  Industrial Kilns: Used as the working lining or insulation lining of kilns in industries such as glass, metallurgy, and petrochemical (such as the top/wall of reheating furnaces and aluminum melting furnaces).
  2. Thermal Equipment: Applied to the lining of regenerators, improving thermal efficiency and service life.
  3. Other Fields: Used as the heat - insulating protective layer of the linings of flue gas ducts and chimneys.
Construction Methods
  1. Mixing: Add 5% - 8% water and stir for 5 - 8 minutes until the slurry is uniform.
  2. Casting: Vibrate to make it compact and avoid aggregate settlement.
  3. Curing: Demold after curing at room temperature and avoid vibration.

Case of Lightweight Mullite Castable

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ABOUT XZK GROUP
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Product Range:
High/mid-grade sintered zirconia, corundum, AZS bricks,lightweight insulation bricks, and unshaped refractories with annual output value exceeding 500 million RMB.
Production Capacity:
4 automated batching systems
4 high/ultra-high temperature tunnel kilns + 5 shuttle kilns
30 CNC presses (400-1500T capacity)
Digitalized workshops producing 150,000 tons/year
93 patents, including the industry-first Triple-ResistantBrick (Patent ZL201310431067.6) for glass furnaces,excelling in erosion/thermal shock resistance.
Co-drafted industry standards forandalustie/chrome-corundum/zircon bricks withChina Building Materials Academy.
Strategic partners: Baowu Group, CNBM, CSG Holding. Xinyi Glass, Kibing Group.
Led by Prof Shi Gan (renowned refractory expert), our 40+ R&D professionals drive innovation in green material technology
Prof. Shi Gan
Chief Scientist & R&D Director, XZK Group
China's highest technical for industrial R&D leadership.
Key participant in drafting 5+ national industry standards.
Principal inventor of the Triple-Resistant Brick, resolving critical glass furnace longevity challenges.
Zhengzhou Zhongke Refractories Co.
Lightweight insulation materials (alumina bubble bricks, mullite bricks)
Zhengzhou Zhongke New Materials Co.
High-temperature specialties (chrome-zirconia corundum bricks, triple-resistant bricks)
Zhengzhou Hengruida Materials Co.
Premium zirconia-series refractories
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We offer one-on-one dedicated sales and technical team services to perfectly solve any refractory material problems you encounter
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The company has over 30 technical R&D personnel and can provide professional solutions based on the on-site conditions of customers
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We have a strict quality management system to ensure the stability of the quality of each batch of products.
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Add: Micun Industrial Area, Xinmi City, Henan Province, China
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