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About ProductThe DF insulation castable refractory is our newly developed standard quality product based on corundum, alumina cement and additive. This product combines excellent micro structural flexibility with good coat ability and can therefore successfully be used in the various incinerators, which are used to burn a large amount of living garbage, industry scrap and exhaust gas. Compared to the castable refractory sample from Norway, our product has the characteristics of higher compactness, lower porosity, stronger compressive strength and flexural strength. The excellent performance of this product is on the following:long usage timeNo maintenanceIntermittent operation of rubbish incineratorHigh temperature corrosion resistance Item Brand, index GD-170 GZ-3 GZ-4 HDG-4 Volume density Kg/m3 110oCx24h 2350-2300 3050-3000 2900-2850 1000-950 1200oCx3h 2300-2250 3000-2950 2850-2800 950-900 Cooling Normal-temp compression /bending strength MPa 110oCx24h ≥30/5 ≥50/7 ≥90/8 ≥5/1.5 1200oCx3h ≥25/4 ≥70/9 ≥95/8.5 ≥4.5/1.1 Linear change Ratio After Firing % 1300oCx3h 1-2 ≤-0.2 ≤-0.2 8153h -0.2 Alumina contents % 45-50 ≥93 ≥92Silicon oxide contents % 35-40Thermal conductivity 350 W/M.K350 <0.25