Dry gunning (also called “gunning”) is an installation technique that consists in placing by pneumatic or mechanical projection.
The refractory castable (refractory concrete) is transported dry via compressed air to the nozzle. At the nozzle, a liquid is added and the mix hits the service location.
Dry gunning is a technique used to spray insulating castable or dense castable. The formulations are based on high quality aggregates such as vermiculite, fireclay, andalusite, corundum, bubble alumina.
Kerneos manufactures and sells refractory cements that can be used in dry gunning:
Technical article on www.secar.net is available on dry gunning: