Lightweight Insulation Refractory Castable

Lightweight Insulation Refractory Castable

Elements of insulatingrefractory casting material

Light aggregate insulation refractory castings are composed of refractory lightweight aggregate, powder, binder and admixture.Foam insulation refractory castable refractory powder, binder and foaming agent and so on, the refractory powder by clay and other components of the clinker powder, refractory clay brick powder, fly ash, cement binder for the major of silicon salt or aluminate cement, rosin soap foam agent, foaming agent often USES saponin fat foam agent, petroleum sulfonate aluminum foam agent, etc., applied the most were rosin soap foam agent.It is made up of refractory powder, binder and gas, which is the same as the material used in the foam.Air entrained agent is usually some metal powder, they will be made by hydrogen reacts with an acid to form a porous castable, there are also using dolomite or periclase quartz < > as a stabilizer and sulfuric acid reaction, or by using calcium carbide and water form acetylene gas and gas role, in addition, such as thermal freely with clay, bauxite clinker powder or industrial alumina powder for powder, with phosphate as binder, at the same time because of the phosphoric acid reacts with iron hydrogen gas effect, also made gas heat insulation refractory castable.

Characteristics of insulating refractory casting material

Heat insulation refractory castable high porosity, low thermal conductivity, have certain fire performance and good heat insulation performance, applications in industrial furnaces and thermal devices can save energy (with general refractory can reduce heat loss of 20% ~ 80%), increase the efficiency of kiln for, can also reduce bearing equipment, adopts the integral casting or prefabricated forming is convenient for installation.

Heat insulation refractory castable with aluminate cement commonly preparation, the highest use temperature is 800 ℃, such as using slag Portland cement its highest use temperature is 700 ℃.The gas insulated refractory casting material is used more with phosphoric acid and gas casting.