refractory ceramic balls

thermal conductivity, excellent resistance to high temperature and the thermal shock. The product is widely used in recuperate in air separation process, and also used in blast furnace gas heating furnaces in iron & steel plants.Main Performance TypeIndex Air separation heat storage ballHeating furnace heat storage ballChemical compositionAl2O3%20-3060-65SiO2+Al2O3%≥90≥90Fe2O3%≤1≤1.5Size (mm)φ10-12/φ12-14φ16-18/φ20-25Specific capacity J/Kg k≥836≥1000Thermal conductivity Kcal/mh2.6-2.9Thermal shock resistance °C8001000Refractoriness °C15501750Abrasion loss %≤0.1≤0.1Mohs hardness scale≥6.5≥6.5Compressive strength N800-12001800-1200Bulk density kg/m31300-14001500-1600