Patent ID: 7968047

Claim:
A blaster nozzle for use in the pneumatic removal of cloggings and cakings during the transport of particulate matter through an enclosure housing, the blaster nozzle comprising a nozzle head, a flange member and a connection tube, the flange member being connected to the nozzle head, the connection tube extending from the flange member for connecting the blaster nozzle to an air cannon, the nozzle head being composed of a refractory concrete having about 4-20% by volume metal fibers therein, the nozzle head having an inner surface which defines a passageway extending from adjacent the flange member for conduction of, and contact with, high-pressure air, the nozzle head having an orifice at a distal end of the passageway where high-pressure air is expellable from the blaster nozzle, at least a majority of said inner surface being said refractory concrete, the nozzle head having an outer surface of said refractory concrete, the orifice, including the inner and outer surfaces thereof, being made entirely of said refractory concrete, the nozzle head being effective to receive high-pressure air from an air cannon, convey the air through the passageway to the orifice, and expel the air from the orifice so that at that point the air leaves the blaster nozzle, the nozzle head being effective in pneumatically removing cakings from the enclosure housing, the orifice forming a constriction with respect to the passageway.