Nonhazardous pumpable refractory insulating composition

Details Nonhazardous pumpable refractory insulating composition Nonhazardous pumpable refractory insulating composition

C - Chemistry, Metallurgy

04

B

C04B 35/66 (2006.01) C04B 35/18 (2006.01) C04B 35/63 (2006.01)

Patent

CA 2145563

A granular castable refractory composition is provided which has excellent insulating properties as well as high strength and resistance to oxidation, corrosion or erosion. The refractory insulating composition can be easily transported using a pump, and avoids the potential hazards associated with asbestos and ceramic fibers. The refractory insulating composition is prepared by mixing a low density expanded granular refractory insulating material having a density of 7-50 lb/ft3 with a conventional high density refractory material having a density of at least 150 lb/ft3 to form a dry component, and by mixing the dry component with aqueous colloidal silica to provide excellent flow properties for pumping and, ultimately, excellent binding properties.

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