Refractory cement is also called aluminate cement or high aluminum cement. Aluminate cement is a hydraulic cementing material made by calcination of bauxite and limestone with calcium aluminate as the main component and alumina content of about 50%. Aluminate cement is often yellow or brown, there are also gray. The main minerals for the refractory cement export are monocalcium aluminate (CaO·Al2O3, CA for short) and other aluminates, as well as a small amount of dicalcium silicate (2CaO·SiO2).
This series refractory cement used for cementing all kinds of refractory aggregate (such as corundum, calcined high bauxite, etc.), to make refractory mortar or concrete, used for lining industrial kiln. Refractory cement forms a low eutectic substance under the action of high temperature. When the refractory castable is configured, too much addition will reduce the high temperature performance of the castable. Silica powder can be used to replace the refractory cement in general production.
Refractory cement refers to cement with a fire resistance not lower than 1580°C. The refractory cement export Ireland is mainly made of bauxite and limestone. The clinker with calcium aluminate as the main component and alumina content of about 50% is calcined and then grinded into hydraulic cementing material. According to the different composition, can be divided into aluminate refractory cement, low calcium aluminate refractory cement, calcium magnesium aluminate cement and dolomite refractory cement. Refractory cement can be used to cement all kinds of refractory aggregates (such as corundum, calcined high bauxite, etc.), to make refractory mortar or concrete, used in cement rotary kilns and other industrial kilns as lining.
In order to ensure that there is enough time to complete the mixing, transportation, molding and other processes in the construction of refractory cement export Ireland, the initial setting time of cement should not be too short; After the completion of construction, hope the refractory cement can harden as soon as possible, producing strength, so the final setting time should not be too long.