Highly concentrated supersonic material flame spray method and a

Fluid sprinkling – spraying – and diffusing – Processes – Including heating or cooling

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239 79, 239 81, 219121PL, 219121PY, 51321, B05B 720

Patent

active

045401217

ABSTRACT:
Particulate material, which may be heat softened or liquified, or which may remain solid, is fed outside of an electrical heating zone for electric arc heating under pressure a continuous flow of heated gas, or outside of a combustion chamber producing high pressure, high temperature products of combustion, axially into the converging flow of the heated gas or products of combustion while entering a converging portion of a flow expansion nozzle having a nozzle bore of a length that is at least five times the diameter of the nozzle bore. This restricts the diameter of the column of particles passing through the nozzle bore to prevent build up of particle material on the nozzle bore, if molten or heat softened, while insuring sufficient dwell time within the bore to effect particle heat softening or melting, or if the particles are solid, to prevent abrasion of the nozzle bore wall by the particles while accelerating the particles to supersonic velocity.

REFERENCES:
patent: 4370538 (1983-01-01), Browning
patent: 4384434 (1983-05-01), Browning
patent: 4416421 (1983-11-01), Browning

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