FIELD: metal working. SUBSTANCE: as a power carrier overheated water vapor is taken at the temperature of 400 550 C with the pressure of 3 25 MPa. The concentration of the abrasive dust having the degree of dispersity of 50-200 micrometer in the mixture makes up 1-5 wt. In this case the dust feed and its concentration in the mixture are regulated by introducing the dosing agent in the upper and lower parts of the dosing tank. It allows to obtain the jet with the speed 1300 - 1500 m/s at the output of the supersonic booster nozzle. EFFECT: enhanced efficiency. 1 cl, 2 dwg
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