• Unshaped Refractory Materials

          Unshaped refractory materials are defined as” mixtures consisting of aggregates, additives, and binders, prepared for direct use in the state of delivery or after adding suited liquids”. In contrast to refractory bricks, they are without specific shape and are in majority placed in larger sections behind molds and templates forming a monolithic lining. Gunning installations without the requirement for a mold are increasing due to ease of application and higher installation speed.

tabular alumina specification

Tabular alumina is a kind of pure sintered alumina,which is sintered and completely shrink without adding any additive ,with coarse crystals and well-developed α- Al2O3 crystal structure.The tabular crystal structure is characterized by narrow pores,with more closed porosity, almost the same apparent porosity compare with fused corundum ,high purity, good stability volume density , tiny refiring shrink.After high temperature treament,tabular alumina is used for refractoris and castable characterized by good thermal shock stability and flexural strength.

FunctionGuarantee
Chemical Composition%AL2O399.0%min
Na2O0.40%max
SiO20.15%max
Fe2O30.10%max
Bulk Density g/cm33.50min
Apparent porosity %5.0max
Water Absorption %1.5max
Magnetic %0.02max
Grit size(mm)5-8 3-5 1-3 0-1mm
Fine grit200mesh,325mesh

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