Corundum Self Flowing Castable

The main application of corundum self-flowing material is the narrow parts of the kiln and the repair of damaged linings, and its characteristics can be fully demonstrated. The various self-flowing refractory castables introduced above can be used for furnace repair. In addition, high-temperature hot self-flowing repair materials generally use asphalt and phenolic resin as binders or composites, and the critical particle size of the material is 5mm.

The self-flowing degree of corundum self-flowing material is different due to the different types of refractory aggregates used. For example, when 99.4% Al2O3 of fused white corundum, 94.5% Al2O3 of fused brown corundum, 98.7% Al2O3 of fused alumina-based corundum and 98.9% Al2O3 of dense corundum are used as refractory aggregates, and their bulk densities (g·cm-3) are 3.42, 3.82, 3.83 and 3.83 respectively, when the material mix ratio and water dosage are exactly the same, the self-flow rate of the castable is 82%, 144%, 155% and 157% respectively. Because fused alumina-based corundum is dense, with a water absorption rate of 0.6%, while fused white corundum is 3.1%, the fluidity of the self-flowing corundum prepared with fused white corundum is lower than that of the other three aggregates. When preparing self-flowing refractory castables, materials with high bulk density, low water absorption rate and few impurities must be selected as refractory aggregates.