Refractory concretes, also known as refractory castables, are heat-resistant mixtures used for constructing and repairing high-temperature industrial equipment. These materials are poured or cast into place and harden into a durable, monolithic structure capable of withstanding extreme conditions.

What Are Refractory Concretes?

Refractory concretes consist of high-grade fire-resistant aggregates, binders (such as calcium aluminate cement), and carefully selected additives. Once mixed with water, they form a dense mass that can be shaped or cast into any desired form. After drying and heat treatment, they become strong, durable, and resistant to thermal and mechanical stress.

Key Advantages:

• High temperature resistance — up to 1800°C;
• Flexible installation — casting, pumping, gunning, or troweling;
• Excellent mechanical strength and thermal shock resistance;
• Custom shapes — ideal for complex linings and repairs;
• Fast setting and curing — reduces downtime during maintenance.

Applications:

• Steel and non-ferrous metallurgy (ladles, troughs, furnace linings);
• Cement industry (rotary kilns, coolers)
  Power and energy sector (boiler linings, burners);
• Incinerators and chimneys;
• Petrochemical reactors and reformers.

Types of Refractory Concretes:

• Conventional castables — economical, for general-purpose use;
• Low Cement Castables (LCC) — improved density and strength;
• Ultra-Low Cement Castables (ULCC) — superior performance at high temperatures
• Insulating castables — lightweight, for thermal efficiency;
• Self-flowing castables — flowable, for easy application without vibration.