The difference between refractory castables and refractory cement

Composition, use and construction method

• The main difference between refractory castables and refractory cements is their composition, use, and construction methods.
• Composition: Refractory castables are a mixture of refractory aggregates, binders and admixtures, which are mixed with water (or liquid binders) to form a mud material that can be constructed by pouring. Refractory cement is made of high-quality bauxite and high-quality lime as raw materials, which are mixed into raw materials with appropriate ingredients in a certain proportion. After sintering, the obtained clinker with aluminate as the main component is ground into fine powder to make a hydraulic cementitious material with fire resistance.
• Application: Refractory castables are mainly used to construct various heating furnace linings and other integral structures, and are suitable for unshaped refractory materials formed by casting. Refractory cement is mainly used as lining for industrial kilns and is a high temperature resistant cementing material.
• Construction method: Refractory castables have high fluidity and are suitable for construction by pouring, and can harden without heating. Refractory cement is mainly used to bond various refractory aggregates to make refractory mortar or concrete, which is used as lining for cement rotary kilns and other industrial kilns.

In summary, although refractory castables and refractory cement are both refractory materials, their composition, uses and construction methods are different and suitable for different engineering needs.

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