Lightweight castables are characterized by low density, light weight, low thermal conductivity and good thermal insulation. There are various varieties of light weight castables, with neutral and acidic properties. Some high-grade light refractory castables can also be used in the furnace lining as a working layer, such as acidic 1.5 specific gravity acid-resistant light castables, used in the chimney or flue, the effect is also quite good, with this light castable will make the chimney light weight, reduce pressure. There is also alumina hollow ball refractory castable, this material belongs to the high-grade material in the light castable, which can be used in the special light kiln lining, not only high temperature resistance, but also light kiln weight.
