Refractory Castables with a true porosity not less than 45% are called insulating castale refractory. Insulating castale refractories are composed of refractory lightweight aggregates and powders, binders or admixtures. Insulation refractory castables are classified into light aggregate refractory castables, foam refractory castables and aerated refractory castables.
The aggregate of the insulating refractory castable is divided into: coarse aggregate, particle size 10~3mm, loose bulk density less than 1.0g/cm3; fine aggregate, particle size less than 3mm, loose bulk density less than 1.2g/cm3.
Lightweight aggregates mainly include expanded perlite, ceramsite, porous clinker, floating beads, pumice vermiculite, and alumina hollow spheres.
The foam refractory castable consists of refractory lightweight aggregate, binder and foaming agent. The foaming agent is used most in rosin soap.
The gas-filling agent in the aerated refractory castable is produced by reacting certain metal powder with acid to form hydrogen, or dolomite, periclase and gypsum (as a stabilizer) with sulfuric acid, or by generating acetylene reaction with calcium carbonate and water. The gas is such that the cast body is a porous lightweight body.
The insulating castale refractories isolate the heat transfer and is generally used in the tundish part of the kiln to save energy. Rongsheng insulating refractory castables refractory manufacturer, produces and sells a variety of unshaped refractory materials, welcome to quote the price and learn more about the insulating castale composition of insulating castale refractory.
