Agitating – By injecting gas into mixing chamber – With stirrer
Utility Patent
1999-07-07
2001-01-02
Soohoo, Tony G. (Department: 1723)
Agitating
By injecting gas into mixing chamber
With stirrer
C366S169100, C366S262000, C261S087000
Utility Patent
active
06168307
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a rotor for the treatment of a liquid such as molten metal by the addition of gas and/or particulate material. The rotor comprises a hollow rotation body with openings in a base and side which is mounted on a shaft and driven via the shaft by a drive unit and which is designed to be lifted out of and lowered into the liquid.
2. Description of Related Art
Apparatus and methods have previously been known for treating a liquid and adding particulate material to it as stated above. The applicant's own Norwegian patent no. 155.447 describes a rotor for treating a liquid and adding material to it in which the rotor comprises a rotationally symmetrical hollow body and in which the material is added to the liquid via a hole drilled in the rotor shaft and emerges through holes in the side of the hollow body together with the liquid, which is sucked in, by means of centripetal force, through an opening in the base and circulated through the body.
This rotor produces a high liquid treatment capacity, i.e. the admixture of gas or particles, with very little agitation or turbulence in the liquid.
A general requirement for rotors for liquid treatment, in particular treatment of molten metals, is that the admixture of gas or particulate material is efficient. However, it is also desirable to avoid the creation of a great deal of agitation or turbulence which leads to an agitated surface and vortices in the liquid and which thus leads to increased admixture of gas from the surroundings (atmosphere).
SUMMARY OF THE INVENTION
The present invention represents a solution with respect to rotors for liquid treatment in which the efficiency of the admixture of the gas or particles to a liquid is almost doubled, but in which the agitation is unchanged compared to the solution disclosed in the applicant's own Norwegian patent. Moreover, the present invention represents a solution with respect to rotors in which the gas/particle requirement (consumption) is more than halved. The present invention is characterized in that the hollow rotation body is provided, in its cavity, with at least one partition wall or at least one rotationally symmetrical hollow body so that one or more annuli are formed and that gas and/or liquid is/are supplied to the annuli and the central cavity via channels and/or holes in the respective partition wall(s) or body(ies).
REFERENCES:
patent: 988149 (1911-03-01), Stussy
patent: 2166772 (1939-07-01), Salsas-Serra
patent: 2341536 (1944-02-01), Fash
patent: 2609189 (1952-09-01), Dering
patent: 2743914 (1956-05-01), Epprecht
patent: 2892543 (1959-06-01), Daman
patent: 3067988 (1962-12-01), Rodoz
patent: 3095149 (1963-06-01), Peebles
patent: 3554518 (1971-01-01), Ostberg
patent: 3761548 (1973-09-01), Winter et al.
patent: 4249828 (1981-02-01), Condolios
patent: 4297214 (1981-10-01), Guarnaschelli
patent: 23 43 001 (1975-03-01), None
patent: 1590125 (1990-09-01), None
Norsk Hydro ASA
Soohoo Tony G.
Wenderoth , Lind & Ponack, L.L.P.
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