Process for applying low-cement castable refractory material

Details Process for applying low-cement castable refractory material Process for applying low-cement castable refractory material

B - Operations, Transporting

05

D

B05D 1/02 (2006.01) B28B 1/32 (2006.01) C04B 2/06 (2006.01) C04B 28/06 (2006.01) C04B 40/00 (2006.01) C21B 7/06 (2006.01) E04F 21/12 (2006.01) F27D 1/16 (2006.01)

Patent

CA 2194894

A method for placing a thixotropic low-cement castable refractory material without the necessity for forms. A low-cement castable material is mixed with a measured amount of water, then is pumped hydraulically through a hose (13) to a nozzle assembly (14). Compressed air and a cement setting agent are added to the mixture at the nozzle (14). The addition of the setting agent at the nozzle (14) overcomes the thixotropic nature of the low-cement castable, so that it will immediately "set" in position when sprayed onto a surface, including vertical and overhead surfaces.

Procédé d'application d'un matériau thixotrope, réfractaire et coulable, qui possède une basse teneur en ciment sans utiliser de moule. On mélange un matériau coulable à basse teneur en ciment avec une quantité mesurée d'eau, puis on le pompe hydrauliquement à travers un tuyau (13) vers un ensemble de pulvérisation (14). On ajoute au mélange de l'air comprimé et un agent de durcissement du ciment au niveau de la buse de pulvérisation (14). L'apport de l'agent de durcissement au niveau de la buse (14) permet d'annuler la nature thixotrope du matériau coulable et, de ce fait, ce dernier durcit immédiatement sur place quand on le pulvérise sur une surface, y compris des surfaces verticales et surélevées.

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