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Classification of Refractory Castables

Time:2026-07-10 Click:23

Classification of Refractory Castables

Refractory castables, commonly referred to as "castables," belong to the category of unshaped (monolithic) refractory materials. Among the various types available, calcium aluminate cement is one of the most widely used binders in refractory castable production.

Classification by Characteristics

  • High-strength wear-resistant castables

  • High-temperature resistant castables

  • Low-cement castables

  • Steel-fiber reinforced castables

  • Acid- and heat-resistant castables

Classification by Raw Materials

  • Clay-based castables

  • High-alumina castables

  • Siliceous castables

  • Mullite castables

  • Corundum castables

  • Silicon carbide castables

  • Magnesia-based castables

Classification by Application Environment

  • Alumina-silicon carbide castables for iron ladles and runners

  • Alumina-magnesia spinel castables for steel ladles

  • Other specialized castables designed for industrial furnaces and kilns

Classification by Density

  • Lightweight castables

  • Dense (heavyweight) castables

Classification by Chemical Properties

  • Acid-resistant castables

  • Neutral castables

  • Alkali-resistant castables

  • Alumina-based castables

  • Magnesia-based castables

  • Carbon-based castables

The classifications above mainly refer to cement-bonded refractory castables. In addition to cement bonding, refractory castables can also utilize phosphoric acid, resin, or water glass (sodium silicate) as bonding agents. Among these options, cement-bonded castables remain the most widely used in industrial applications.

Xinxiang Tianyi Thermal Insulation Materials specializes in the production of high-temperature refractory castables, refractory bricks, lightweight insulating bricks, high-alumina bricks, and high-alumina wear-resistant castables. The company offers both shaped refractory products, including aluminum silicate bricks, silica bricks, basic refractory bricks, and lightweight insulating bricks, as well as unshaped refractory materials such as castables, self-flowing materials, and plastic refractories for industries including coking, building materials, iron and steel, non-ferrous metallurgy, and electric power generation.


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