What is gunite?
Gunite refers to an application method for refractory monoliths. The method involves a specialized piece of machinery called a gunning machine or a gunite rig. The machine uses a high volume of air to convey dry or damp refractory material through a hose to a spray nozzle. In appearance this hose and nozzle will remind you of a firemans water hose, but both items are specially designed for use with refractory materials. Enough water is introduced at the nozzle to thoroughly wet the refractory and make it sticky enough to adhere to the surface of the vessel it will protect. Gunning operations can be run to repair or build refractory linings that are cold, but the greatest value of a gunite mix is for repair of refractory linings that are still hot.
