Beijing North Refractories Co., Ltd.
Beijing North Refractories Co., Ltd.
Ladle Calcium Silicate Insulation Rigid Boards

Ladle Calcium Silicate Insulation Rigid Boards

NR-85STEEL boards are high strength calcium silicate based insulation boards.

Ladle Calcium Silicate Insulation Rigid Boards are high-temperature insulation materials specifically engineered for use in metallurgical applications, particularly in ladles and tundishes. These boards provide exceptional thermal resistance, minimizing heat loss and maintaining consistent temperatures during molten metal handling. Their rigid structure ensures durability and ease of installation, contributing to improved energy efficiency and process control in steelmaking and other high-temperature industrial environments.


Specifications of Ladle Calcium Silicate Insulation Rigid Boards

Thermal shrinkage 12hr
1000℃1000℃1000℃1000℃1000℃1000℃
@ Length or Width%0.20.200.20.40.40.40
@ Thickness%1.41.401.31.51.01.0
Screw Holding Strength
@ 22mm  penetration
kg80105110120120145
Coefficient of Thermal Expansion/℃6.5*10-66.4*10-66.4*10-66.4*10-66.3*10-66.1*10-6
Standard Sizes1200 X 600 mm ,  1200 X 1200 mm ,  2400 x 1200mm, 2520 x 1200mm
Available Thickness13, 19, 25, 27, 32, 38.1  44, 51.4, 63, 76.1, 101.6
AdvantagesLow thermal conductivity, Non‐wetting, Excellent mechanical strength, Asbestos free, easy to install, dimensional stability
Applications• Dip tubes   • Pouring spouts  • Hot‐top rings   • Stopper pins   • End dams  • Floats   • Launders, Holding furnace insulation linings, ladle insulation boards.

Note: The physical and chemical properties listed represent typical, average values obtained in accordance

with accepted test methods and are subject to normal manufacturing variations. They are supplied as a technical service and are subject to change without notice

Features of Ladle Calcium Silicate Insulation Rigid Boards

The boards are characterized by their low thermal conductivity, high compressive strength, and excellent thermal stability at elevated temperatures, often exceeding 1000°C. They exhibit minimal shrinkage and possess a low density, reducing the overall weight of the insulated structure. Furthermore, their non-combustible nature and resistance to chemical attack from molten metals and slags contribute to a safer and more reliable operational environment. The precise manufacturing process produces boards with consistent properties, allowing for predictable thermal performance.


  • Very Strong Boards with high compressive strength

  • High temperature resistance up to 1200°C

  • Low Thermal Conductivity at high temperatures

  • High Electrical Resistance at high temperature

  • High fire resistance and heat shield properties

  • Easy to cut and punch

  • Available in moulded pipe section for pipe insulation



Applications of Ladle Calcium Silicate Insulation Rigid Boards

The primary applications of Ladle Calcium Silicate Insulation Rigid Boards are in the lining of ladles and tundishes used in steelmaking, Their ability to maintain molten metal temperatures reduces energy consumption and improves the quality of the final product. They are also used in other high-temperature industrial furnaces and kilns where efficient thermal insulation is crucial. Additionally, these boards are utilized in backup insulation systems to enhance the overall thermal performance of refractory linings, extending the lifespan of the equipment and minimizing downtime.


  • Ladle & Tundish Insulation

  • Lime Kiln and Cement Kiln Insulation

  • High temperature insulation Gaskets

  • Boiler & Furnace Insulation

  • Oil & Gas Burners Insulation

  • Furnace, Dryer, and Oven Insulation

  • High temperature Pipe Insulation

  • Refractory insulation expansion joints

  • Metal clad Gaskets fillers

  • Gaskets for centrifugal casting

  • Glass rollers as washers on mandrel

  • Stainless Steel Plant Rollers Insulation

  • Electrical & home appliances insulation gaskets

  • Fire Resistant Doors, Lifts, Safes, Cupboards

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