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Item | Specification | ||
Technical | Closed Cell Perlite | Expanded perlite | |
Size(mm) | 0.1-1.5 | 0.15-3 | |
Bulk density(kg/m3) | 100-200 | 70-250 | |
Thermal Conductivity(w/m.k) | 0.035-0.047 | 0.047-0.054 | |
Ball rate(%) | 70-90% | 0 | |
Closed cell ratio(%) | ≥95 | 0 | |
Water absorption rate | 50-85 | 360-480 | |
Compressive strength | 38-46 | 76-83 | |
Refractoriness(%) | 1280-1360 | 1250-1300 | |
Operating temperature(℃) | <800 | <750 | |
Item | Particle Size |
Raw Perlite | 20-30, 20-40, 30-50, 50-70, 70-90, 90-120 mesh |
Expanded Perlite | 1-3mm, 2-4mm, 3-6mm, 4-8mm, 150mesh, 200mesh, 325mesh or according to your need |







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