Comprehensive refractory additives guide.
Refractory additives are specialized chemicals used to improve the mechanical, rheological, and thermal properties of refractory materials. The refractory industry, which includes production of bricks, castables, mortars, and high-temperature resistant coatings, heavily depends on chemical additives. Kimia Ceram Zarin offers three main categories of refractory additives: binders (for strength), dispersants (for flowability), and setting regulators (for controlling hardening time).
Refractory binders increase the green and fired strength of refractory materials and are used in pressed brick and castable production. Dispersants reduce mix viscosity and improve refractory castable flowability. Setting regulators include accelerators and retarders that control refractory castable hardening time. These additives are compatible with alumina and silica systems and are used in steel, cement, and glass industries.
What additives are suitable for refractory castables?
A combination of binder (for strength), dispersant (for flowability), and setting regulator (for hardening time control) is typically needed. The exact selection depends on the refractory system type.