Perlite is a volcanic glassy lava from the acidic by crushing, preheating, baking expansion of porous structure made of white, loose granular materials, with a small capacity, low thermal conductivity, chemical stability, non-flammable, non- toxic, tasteless, acoustic and other characteristics. Perlite (ultra-low temperature super-power engineering expanded perlite) is selected by the selection of powder ore pellets by a vertical shaft kiln with natural gas as heat source, heating the product obtained by expansion, which enhanced the surface of expanded perlite products are silicone spray to form a hydrophobic structure. Product color, density, size similar to the ordinary perlite. This product is mainly used for large ultra-low temperature thermal insulation construction projects, such as oxygen air separation unit, natural gas, hydrogen, nitrogen, oxygen and other refrigerated transport travel. This product has a good ultra-low temperature thermal insulation performance, product quality is superior to the European classification society standards. 

 No Specification label 
 Unit performance 
 Type 50 Type 60 
 Loose Density kg/m3 50 60 1 
 2 Tap Density kg/m3 60 70 
 3 size 
 (Weight% ratio) 1.0mm volume% 1.0mm-0.05mm by not less than 90% 1.0mm-0.05mm less than 90% 
 % 0.05mm 0.05mm maximum throughput maximum of 8% 8% 0.05mm 
 4 Quality of water content (weight% ratio)% ≤ 0.5 ≤ 0.5-1 
 5 angle of repose (when the stacking height 100mm) 033-37 
 6, the increase in packing density of the process of manually% ≤ 25 
 Wind-driven% ≤ 35 
 7 Thermal conductivity in the (atmospheric temperature in 77k-301k average) W / 0.022-0.025 0.023-0.026 
 Temperature ℃ -200-800 8 
 Note: The table bulk density, tap density is maximum 
 Chemical composition: 
 SiO2 (%) TiO2 (%) AlO3 (%) Fe2O3 (%) MnO (%) MgO (%) CaO (%) 
 72 12.31 0.54 0.06 0.14 1.00 0.09 
 K2O (%) Na2O (%) P2O5 (%) LOI 
 4.67 3.29 0.04 4.94