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Abstract

A blasting nozzle structure for wet-blasting of an abrasive slurry, which structure includes a body having substantially parallel first and second passages for flow therethrough of pressurized air and abrasive slurry, respectively. A nozzle member extends longitudinally of the member and defines a longitudinally elongated but narrow slitlike opening which opens transversely from the slurry passage for permitting discharge of a thin curtainlike stream of abrasive material. An air nozzle member is also fixed to the body part and defines a narrow slitlike flow opening threrthrough, the latter extending transversely from the air passage through the slurry passage for directing a thin curtainlike jet of air into the slurry passage directly adjacent the upstream end of the main discharge slit. The discharge slit and the air slit are each elongated parallel with the respective passages so as to have substantially rectangular configurations, whereby the nozzle structure is capable of discharging a thin curtainlike jet of air-slurry mixture, which curtainlike jet is of fairly uniform pressure and slurry concentration throughout the longitudinal extent thereof.

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First Claim