• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The apparatus of the invention is capable of injecting gas in the form of small discrete bubbles into a mass of molten metal. The apparatus comprises a rotatable shaft coupled to drive means at its upper end and a vaned rotor at its lower end. Gas under sufficient pressure to be injected into the melt is fed into a passageway extending axially through the device whereby upon rotation of the rotor the gas is injected into the molten metal and subdivided into discrete gas bubbles. The process of the invention utilizes the above described gas injection apparatus for refining molten aluminum by introducing an inert gas into the metal beneath the surface of the melt.
    公开号:SU1068040A3
    申请号:SU721864202
    申请日:1972-12-26
    公开日:1984-01-15
    发明作者:Геза Шекелы Андрю
    申请人:Юнион Карбид Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    2, the apparatus according to claim 1, characterized in that the shaft is encased above the stator, and the shaft is enclosed in a casing whose diameter is smaller than the outer diameter of the stator. ;
    3, the Device in PP. 1 and 2, what about the inside
    The shaft along it is provided with an additional axially located channel with holes for connecting the additional channel with the channel formed by the inner surface of the housing and the stator and the outer surface of the shaft.
    one
    The invention relates to the refining of molten metashers using gases, in particular, is applicable to the refining of aluminum from pacfied gases and non-metallic impurities: and aims to improve the design of the device for dispersive gas supply to the mass of molten metal.
    The closest in technical essence and achievable effect to the invention is a device for dispersion gas supply, containing a shaft passing through the stator, an upper end connected to a rotation mechanism, and a lower end rigidly connected to a vane rotor, and having an axially arranged annular channel from the outside W for supplying and introducing gas into the mass of molten metal formed by the inner surface of the stator and the outer surface of the SI shaft
    The device effectively refines the molten metals (in particular, steel) from gas and non-metallic impurities due to the dispersed feed to the refining of gases that are inert to the melt being processed.
    The purpose of the invention is to further increase the efficiency of refining molten metals due to a more uniform distribution of gas in the bulk of the metal.
    The goal is achieved by the fact that in the proposed device the lower part of the stator is made blade with the formation between the blades of a plurality of vertical channels, the shaft above the stator is enclosed in a casing whose diameter is smaller than the outer diameter of the stator.
    Inside the shaft, along it can be made an additional axially located channel with openings for connecting the additional channel to the channel formed by the inner surface of the housing and the stator and the outer surface of the shaft.
    A device for dispersing the supply of gas into a mass of molten metal, for example in aluminum or its
    alloys, contains a rotating shaft, the upper end of which is connected to the drive, and the lower end is rigidly connected to the blade rotor, a fixed casing, the surrounding shaft and rigidly fixed by the lower end to the blade stator, provided with a plurality of vertical channels between the blades; an axially shaft extending to the rotor channel for supplying and injecting gas into the mass of metal formed by the inner surface of the casing and the stator and the outer surface of the shaft; gas injection means in the upper part of the injection channel into the molten metal, by rotating the rotor and injecting the gas, the latter is injected into the molten refined metal and crushed into discrete gas bubbles, and the circulating mass of the molten metal is induced and causes intensive mixing of the gas with the metal to be processed, this leads to the fact that, in the main, the mass of molten metal comes into direct contact with gas bubbles.
    FIG. 1 shows the proposed device for dispersion of the first gas supply to the mass of molten metal, general view; in fig. 2 is the same longitudinal section; FIG. 3 a refining system equipped with a gas dispersion device.
    The device consists of a rotor 1, equipped with vertical blades 2, which are rotated by a motor, for example, a pneumatic motor or an electric motor (not shown, by means of shaft 3. Shaft 3, which
    Normal operation Does not come into contact with molten metal, may be made of steel, while the rest of the equipment is preferably made of refractory material, for example, commercially available graphite or carborundum, i.e. materials that are inert to aluminum and its alloys
    used operating temperatures. The shaft 3 is fenced off from the molten metal by a casing 4, which is rigidly attached to the stator 5. The adjacent inner surfaces b and 7, respectively, the housing 4 and the stator 5, the adjacent outer surfaces 8 and 9, respectively, of the shaft 3 and the rotor form an annular axial channel 10 for the injected gas. In the stator 5, a plurality of vertical channels 11 are cut. During operation, the stator 5 and the rotor 1 cause the upper and lower molten metal streams to move around the injection device as shown, mainly by arrows 12 and 13. In particular, the main velocity vector of the upper stream 13 is directed essentially down, t, e. it is located coaxially with the axis of rotation of the rotor 1, while the molten metal is driven into the channels 11 of the stator 5. The bottom of the institute flow, indicated by arrow 12 is more localized, is formed below the rotor 1 and is directed essentially upwards perpendicular to the axis of rotation of the rotor 1. Formed in As a result, the flow of these components is indicated by the arrow 14, which indicates that the molten metal is drawn out by means of the rotating blades 2 radially downward from the rotor 1.. The resulting stream causes a good and uniform distribution of gas in the mixture of molten metal processed in the vessel. An inert gas (the direction of its introduction is indicated by arrow 15), for example argon or nitrogen, is injected under a certain pressure and flow at a certain rate into the annular channel 10. The gas fills the recess 16, which has the shape of a bell, which is a continuation of the channel 10 surrounding the neck 17 of the rotor 1. Since the gas is supplied under pressure, greater than the pressure of the molten metal, to the height indicated by arrow 18, the recess 16 prevents the molten metal from entering the gas passage and prevents contact with the metal of the shaft 3 of the gas injection tel. The neck 17 surrounds the shaft 3 and is made of a material resistant to molten aluminum to be protected by the shaft 3. The rotational moment from the shaft 3 is transmitted to the rotor 1 by means of the wing Part 19, which is screwed onto the side 3. When assembling the wing part 19 is installed in the cavity 20 torus 1. The cavity 20 is shaped like a piece 19. After that, the cavity 20 is hermetically sealed with a thread and a cementing neck 17 in the thread 21 of the rotor 1. Injecting inert gas 15 into the annular channel 10 is not the only means of injection which is injected th gas. In another embodiment, the proposed device may include a hollow shaft in which the channel 22 passes axially through the shaft 3 and is provided with a plurality of drilled holes 23 that provide communication with the cannel 10 and the notch 16. Thus, the inert gas (shown by arrows 15 and 24) can pumped through either channel 10, or channel 22, or both together. What matters is that the cold gas (shown by arrows 15 and 24) entering the injector is preheated during passage through channel 10 or 22 and notch 16 by entering into heat exchange with the adjacent casing 4 and shaft 3, which essentially have molten metal temperature. The pre-heated gas is injected into the space between the blades of the rotor 1, where it is dissipated in the form of small discrete bubbles when it collides with the blades 2 and the flow of metal that is formed by the blades. Forced circulation around the device for injection quickly disperses gas bubbles, as they are formed in the direction of the main flow velocity vector shown by arrow 14. The initial trajectory of the gas balls corresponds to direction c; reels 14 until the lifting force causes the gas balls to float on the surface molten metal. The positive effect of the forced circulation of metal flows around the injection device is as follows: an efficient mechanism is provided for the formation of gas bubbles; coalescence is eliminated by dispersing small gas pellets almost simultaneously with their formation; effective metal circulation is provided, the residence time of gas balls in the molten metal is lengthened, i.e. they remain in the metal longer than when a single force of gravity is applied. The described device can be used in a batch or continuous process when installed in a refining system (Fig. 3). The refining system includes a cast-iron casing 25, in which the working temperature is maintained by conventional heating means, which can be located in 26 and insulated from heat losses by external refractory
    housing 27. The inner surface of the housing 25 is lined with graphite 28 or other refractory material that is inert to molten aluminum and non-metallic impurities, the presence of which is possible. A cover 29 is provided on the casing 213, which is mounted on the flanges 30. A expansion gasket is installed between the flanges 30 and the cover 29. The flanges and cover are bolted, which allows the system to operate without air. An injector / 4 for injecting gas, such as shown in Fig. 1, is attached to a cap 29.
    The gas after passing through the molten metal is collected in the upper space 31 dl. forming an inert gas surface layer over the molten metal and is discharged through the metal inlet 32 in the direction opposite to the incoming metal stream. The free cross-sectional area of the gas channel and, consequently, the pressure in the system are regulated by a valve 33 located in the opening 32. The gas, which is under a small pressure in the upper space 31, prevents air from entering the vessel.
    The metal is fed into the refining system through an inlet 32 for the metal. Inside the vessel, metal 34 is sprayed with uniformly dispersed inert gas bubbles and mixed with a rotating gas injector A. Hydrogen dissolved in the molten metal diffuses into the bubbles and is withdrawn along with the inert gas bubbles as they rise to the surface of the molten metal. The large surface area of well-dispersed gas bubbles serves as an efficient means of transporting suspended particles of oxides to the slag layer 35 of the surface of the molten metal, from which they are easily removed during the slag separation. The main circuits of the zioinche flow formed in the molten metal are schematically shown by arrows 36. This is the metal flow that continues to introduce fresh metal into contact with gas bubbles, which are removed from the space between the rotor and the stator of the injection device.
    The refined molten metal is released from the refining system through an outlet 37 located below the surface of the metal in wall 38. Then the metal passes through chamber 39 and is discharged from the system through an opening with channel 40 for the following clandestine operations.
    In the chamber 39 placed volumetric filtering material, such as graphite or durable refractory chips.
    Slag removal from the metal surface can be accomplished by closing the metal orifice with the metal inlet into the refining system, while inert gas is fed through gas injector A to push the slag layers into the outlet chute 32, from which the slag can be removed by mechanical means. . On the other hand, the metal surface can be cleaned with a hand tool inserted into the casing 25 through the chute of the inlet 32 or through the hole (not shown in the cover 29.
    Refining operations need not be carried out only in the system shown in FIG. 3. The system may contain several separate refining sections or zones through which the molten metal passes sequentially.
    The proposed device for dispersing the supply of gas into the molten metal is characterized by the ability to inject gas at high speed into the molten metal as discrete gas bubbles, which results in a high dispersion rate in the molten metal. The device stimulates the formation of flows in the metal in the area of the device. Thus, the formed bubbles move along the resulting vector of flow, which is directed radially in the opposite direction with the components located at the bottom relative to the vertical axis of the device. These streams have several positive effects: essentially vertical mixing is provided for the entire mass of molten metal, in which downward flows along the device, in combination with rotating blades, are called. gas separation into small discrete bubbles; the rapid propagation of gas bubbles away from the point of injection into the metal prevents the bubble from coalescing in the zone where the concentration of bubbles is very high; the residence time of well-dispersed gas bubbles in the molten metal increases due to the fact that right after the formation of bubbles, the bubbles do not rise to the surface under the action of gravity.
    Another factor that contributes to the maximum separation of gas into small bubbles and, consequently, leading to an increase in the contact area of the bubbles and
    权利要求:
    Claims (3)
    [1]
    (-54) 1. DEVICE FOR DISPERSIVE GAS SUPPLY TO MASS OF MELT METAL, containing a shaft passing through the stator, with an upper end connected to a rotation mechanism, and a lower end rigidly connected to a rotor rotor, and having an axially located annular channel with supply holes and injecting gas into the mass of molten metal formed by the inner surface of the stator and the outer surface of the shaft, characterized in that, in order to ensure a more uniform distribution of gas in the mass of metal, the lower part with the torus is made lobed with the formation between the blades of many vertical channels.
    [2]
    2. The device according to π. 1, characterized in that the shaft is enclosed in a casing above the stator, the diameter of which is smaller than the outer diameter of the stator. :
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that an additional axially located channel with openings is made inside the shaft along it for connecting the additional channel to the channel formed by the inner surface of the casing and the stator and the outer surface of the shaft.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1068040A3|1984-01-15|Device for dispersed gas supply into molten metal mass
    AU605020B2|1991-01-03|Rotary device, apparatus and method for treating molten metal
    US4931091A|1990-06-05|Treatment of molten light metals and apparatus
    US5846481A|1998-12-08|Molten aluminum refining apparatus
    US20170204862A1|2017-07-20|Riserless recirculation/transfer pump and mixer/pre-melter for molten metal applications
    US6960239B2|2005-11-01|Process and apparatus for adding particulate solid material to molten metal
    HU186110B|1985-06-28|Rotary gas spraying device for treating liquid smelting bath
    US4047938A|1977-09-13|Process for refining molten metal
    WO1996039545A1|1996-12-12|Method and apparatus for continuous in-line gas treatment of molten metals
    EP0556343B1|1995-01-25|Jet flow device for injecting gas into molten metal
    US6056803A|2000-05-02|Injector for gas treatment of molten metals
    EP0365013A2|1990-04-25|Device for releasing and diffusing bubbles into liquid
    US5158737A|1992-10-27|Apparatus for refining molten aluminum
    US4017307A|1977-04-12|Thermal method for the recovery of metals and/or metal combinations with the aid of a melting cyclone
    US5899566A|1999-05-04|Reactor for corrosive reaction mixtures
    CA1095732A|1981-02-17|Process for refining molten metal
    CN101104888A|2008-01-16|Molten aluminum refining equipment
    US3385585A|1968-05-28|Rotary furnace for continuously refining molten metal
    US4919396A|1990-04-24|Apparatus for smelting meltable substances, particularly ore concentrates
    US2119528A|1938-06-07|Rotary furnace
    RU2130503C1|1999-05-20|Device for electromagnetic refining of conducting melts
    JPH0338239A|1991-02-19|Granule processing apparatus having mixing and granulating function
    SU1726528A1|1992-04-15|Method of charging liquid iron with powdered agents
    CA2087253A1|1992-01-14|Method and apparatus for treating gases and/or solid material in a circulating fluidized bed reactor
    SU1089155A1|1984-04-30|Device for mixing gases and liquids
    同族专利:
    公开号 | 公开日
    AU4943672A|1974-05-30|
    CA981912A|1976-01-20|
    NO134754B|1976-08-30|
    JPS5236487B2|1977-09-16|
    ES414721A1|1976-02-01|
    IT974890B|1974-07-10|
    FR2166014A1|1973-08-10|
    AU471539B2|1976-04-29|
    NO134754C|1976-12-08|
    ES439938A1|1977-03-01|
    US3743263A|1973-07-03|
    ES410033A1|1975-12-01|
    SU982546A3|1982-12-15|
    DE2263288A1|1973-07-12|
    DE2263288B2|1976-06-24|
    IN137552B|1975-08-16|
    ES414722A1|1976-06-16|
    FR2166014B1|1975-03-28|
    IN140212B|1976-09-25|
    JPS4873314A|1973-10-03|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US21195071A| true| 1971-12-27|1971-12-27|
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