PROCESS FOR THE VACUUM REFINING OF METAL AND ASSOCIATED DEVICE

Title:

PROCESS FOR THE VACUUM REFINING OF METAL AND ASSOCIATED DEVICE

Document Type and Number:

WIPO Patent Application WO/1995/020057

Kind Code:

A1

Abstract:

A process for the vacuum refining of metal involves lowering the pressure of the gas mixture on the surface of the metal melt until the partial pressures of the gases above the melt are lower than the partial pressures of the gases within it; and subjecting the metal to pressure pulses of 0.02-0.08 MPa in the low-frequency range 0.03-5 Hz while also simultaneously altering the pressure in the medium-frequency range 55-195 Hz from 0.005 to 0.01 MPa, and in the high-frequency range 350-3500 Hz from 0.0001 to 0.001 MPa. To that end, the proposed device for the vacuum refining of metal by the process described above comprises: an airtight chamber (1) with a gas outlet pipe (2); an ejector (3) comprising a housing (4), a nozzle (5) and a mixer channel (6); a unit (7) for creating low-frequency pulses in the working gas flowing through the nozzle (5) of the ejector (3); a unit (8) for creating medium-frequency pulses in the gas flow at the inlet to the gas outlet pipe (2); and a unit (10) for creating high-frequency pulses in the gas flow leaving the chamber (1), the latter being designed as a regulator for, in the present case, the flow-through section of the nozzle (5) which forms an insert (20).

Inventors:

KOMRATOV JURY SERGEEVICH (RU)
KIRICHKOV ANATOLY ALEXANDROVIC (RU)
NOVOLODSKY VIKTOR PAVLOVICH (RU)
TRETYAKOV MIKHAIL ANDREEVICH (RU)
BURLAKA GENNADY VIKTOROVICH (RU)
SPIRIN VIKTOR ANDREEVICH (RU)
FETISOV ALEXANDR ARKHIPOVICH (RU)
ALEXANDROV VLADIMIR BORISOVICH (RU)
ZHIGACH STANISLAV IVANOVICH (RU)
SIZOV ANATOLY MIKHAILOVICH (RU)
NIKOLSKY VLADIMIR EVGENIEVICH (RU)
KABLUKA VALERY VLADIMIROVICH (RU)
SAVIN ANDREI VALERIEVICH (RU)

Application Number:

PCT/RU1994/000034

Publication Date:

July 27, 1995

Filing Date:

February 24, 1994

Export Citation:

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Assignee:

AKTSIONERNOE OBSCHESTVO NIZHNE (RU)
MEZHVUZOVSKY INZH TS STRUIMETT (RU)
KOMRATOV JURY SERGEEVICH (RU)
KIRICHKOV ANATOLY ALEXANDROVIC (RU)
NOVOLODSKY VIKTOR PAVLOVICH (RU)
TRETYAKOV MIKHAIL ANDREEVICH (RU)
BURLAKA GENNADY VIKTOROVICH (RU)
SPIRIN VIKTOR ANDREEVICH (RU)
FETISOV ALEXANDR ARKHIPOVICH (RU)
ALEXANDROV VLADIMIR BORISOVICH (RU)
ZHIGACH STANISLAV IVANOVICH (RU)
SIZOV ANATOLY MIKHAILOVICH (RU)
NIKOLSKY VLADIMIR EVGENIEVICH (RU)
KABLUKA VALERY VLADIMIROVICH (RU)
SAVIN ANDREI VALERIEVICH (RU)

International Classes:

C21C7/10; C22B9/04; (IPC1-7): C21C7/10

Foreign References:

US3798025A	1974-03-19
US4057421A	1977-11-08
DE1236541B	1967-03-16
DE1458935B
EP0151872A2	1985-08-21

Other References: