• 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:
    In an apparatus for refining molten metal comprising, in combination : (a) a vessel having four compartments : an inlet compartment, first and second refining compartments separated by a baffle, and an exit compartment separated from the first refining compartment by a common wall, the last three compartments sharing a common bottom surface, wherein (i) the inlet compartment provides a passageway for the molten metal running from the outside of the vessel to the top section of the first refining compartment; (ii) except as provided in (iii), the baffle is constructed in such a manner that it only permits the passage of molten metal overthe top of the baffle; (iii) the bottom section of the second compartment is connected to the exit compartment by an exit tube having an opening on each end, a top wall, two side walls and a bottom wall, said exit tube (11) passing through the baffle (5) and the first refining compartment; having its bottom wall residing on the common bottom surface; and having its inlet end opening into the second refining compartment and its outlet end opening into the exit compartment (12); and (iv) the exit compartment provides a passageway to the outside of the vessel ; (b) one rotating gas distributing device (4,8) disposed at about the center of each refining compartment, said device comprising a shaft having drive means at its upper end and a rotor fixedly attached to its lower end, the upper end being positioned in the top section of the compartment and the lower end being positioned in the bottom section of the compartment, the improvement comprising providing an exit tube (11) wherein (i) the top wall (23) slants downward from inlet end to outlet end at an angle of about 5 to 15 degrees from the horizontal and (ii) the ends of the exit tube (11) are about flush with the baffle (5) and the wall (32) dividing the first refining compartment and the exit compartment (12).
    公开号:SU1058510A3
    申请号:SU813276195
    申请日:1981-04-20
    公开日:1983-11-30
    发明作者:Франклин Пелтон Джон
    申请人:Юнион Карбид Корпорейшн (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to metal rot, in particular to the refining of aluminum and its alloys.
    A device is known for filtering aluminum alloys through mesh filters with a metalostatic pressure of 50-100 mm of melt 1,
    The disadvantage of this device is the low degree of purification and plant capacity.
    The closest to the proposed technical essence and the achieved result is a device for refining metals, including four compartments - inlet, first, second, finishing compartments, separated by a partition, and an exhaust compartment, separated from the first wall, and the last three compartments are separated by a common bottom surface, the lower part of the second part is connected to the outlet section by an outlet pipe having an inlet and an outlet, the top two side and bottom walls passing through A partition, and the first refining section, the lower wall of the exhaust pipe is located on a common lower surface, the outlet of the exhaust pipe is communicated with the external refining sections, and the outlet with the exhaust section. In each refining compartment there is a rotating gas distribution device, which represents. - a shaft with a drive and a rotor, and the rotor is located in the low refining compartment 2j;
    The disadvantage of the device is low productivity.
    The purpose of the invention is to increase productivity.
    The goal is achieved by the fact that in a device for refining molten aluminum, including an inlet compartment, a first and a second refining compartments separated by a partition, and an inlet compartment separated from the first refining compartment by a wall, the lower part of the second compartment is communicated with the outlet compartment by an outlet pipe having an inlet and outlet openings, an E-trunk, two side walls and a bottom wall passing through the partition wall and the first raffin rovochnoe compartment bottom wall of the exhaust pipe located on the common bottom surface of the exhaust pipe inlet with MSG .schena vtorm refining department: Niemi and outlet - with the outlet compartment, installed in each compartment 1 rafinirovochns
    rotary gas distribution device in the form of a Baiia with a drive and a rotor, the upper wall of the exhaust pipe is inclined downward from the inlet end to the outlet at an angle
    5-15 °
    the horizontal and the ends of the exhaust pipe are adjacent to the partition and wall separating the first refining section from the inlet section. Moreover, the connection of the top and bo-.
    0 wall, facing the rotor, rounded or scored.
    In this case, a step is made in the upper wall of the exhaust pipe at the outlet.
    5 In addition, the discharge pipe is made in the form of a monolith partially embedded in the walls of the first refining section.
    FIG. 1 shows the device, top view; in fig. 2 is the same, side view (section A-A in FIG.) In FIG. 3-5 - options for the design of the exhaust pipe; in fig. 6 - exhaust pipe and dividing wall, view from
    5 at the side.
    The device contains the inlet compartment 1, the first refining compartment 2, gas distribution devices 3 and 4, made in the form of a shaft with a drive and a rotor, partition 5, the second refining compartment b, the exhaust pipe 7, the exhaust compartment 8, the outer wall 9, heating elements 10, housing 11, profiles 12 of carbI
    5 yes flint or zirconia.
    The device works as follows.
    Molten metal flows into inlet compartment 1 and then
    0 passes to the first refining section 2, where it meets with a rotating gas distributor (Figs. 1 and 2). The inlet compartment is an extension of the inlet trough or toe tilted into the first refining compartment, in the form of a descent forming a passage for the melt from the outside of the device to the top of the refining section of the HEI compartment 2,,.
    Then the melt from compartment 2 passes through the partition 5 to the second refining compartment 6 to meet with the rotating distribution. a gas divider and through a graphite outlet pipe 7 into the exhaust compartment 8, the outlet in the direction of the arrow 13. Dross floating on the surface is transferred to the inlet compartment 1 and removed. On the outside, the compartment is surrounded by a vessel with a rectangular prism configuration, having an outer wall 9 made of metal with refractory insulation, heating elements in chamber 10 (not so far aegany), cast iron body 11, graphite plates -14 as lining for most refin of the inlet and outlet compartments and parts, silicon carbide or zirconium profiles 12 as lining for the remainder of the inlet and outlet compartments and a plate 15 of silicon carbide, which is a common stack between the first refining department 4 and the released department. The bottom surface, which is common for the refining sections 2 and 6, and for the exhaust section 8, can be made in the form of a gravity plate 14, or two or more plates joined together. The profile 12 forms a sock 16, which is the lower part of the discharge chute. In the inlet compartment, there is the same sock (not shown), which is the lower part of the inlet chute. The socks or the lower parts of the gutters indicate the lowest levels at which the melt can enter the inlet 1 and exit from you. start 8 sections. The overlap is performed by the lid 17.
    With the exception of the exhaust pipe 7 and the partition 5, the structure of the proposed device is a conventional compact gas distribution refining system. The essential difference is that the device is provided with a higher partition, the upper part of which is directly below the surface of the melt, i.e. at the point where the melt can pass freely from one compartment to another during the non-working period.
    The discharge pipe 7 (Fig. 2) starts at the partition 5 and continues until the exhaust section 8. Preferably the exhaust pipe 7 does not pass into the refining b IL.And into the exhaust 8 section. Thus, the inlet and outlet ends of the outlet pipe 7 are made flush with the partition 5 and with the silicon carbide plate 15, which is common for refining 2 and outlet 8 compartments. The discharge pipe is a hollow pipe, open at each end and may be considered divided into four parts, i.e. top, two parallel side and horizontal bottom walls. The top wall of the exhaust pipe is tilted down from. the inlet end to the outlet at an angle of about 5-15 ° to the horizontal (preferably 7-10).
    The maximum width of the exhaust pipe is limited by the radius of the rotor.
    having the ability to rotate freely. In order to reduce the pressure differential, the width is as large as possible under the condition of this limitation, however, the more space is created in the refining zone with an exhaust pipe, the higher the speed of rotation of the rotor is required to create the same refining
    0 effect, and with a smaller distance between the exhaust pipe and the rotor, the likelihood of solid pieces of foreign material becoming trapped increases, causing the rotor shaft to break.
    five
    In the grooves made in the side and bottom walls (Fig. 3), a rounded refractory element is installed and fixed, the walls of the device are used as walls of the exhaust pipe. Element 18 forms the top and side walls for discharging pipe 7. Instead of the right angle when connecting the top and side walls, the element angle
    5 rounded or skoien so as not to inhibit the flow of the melt in the compartment.
    The exhaust pipe 7 (FIGS. 4 and 5) can be made in the form of a monolith, which is expanded by removing the graphite sections of the side and bottom walls 14 and when the exhaust pipe 7 is fixed at this point. If the material is
    5, graphite has been selected; the structure in FIG. 5, since it can be obtained by machining. The width of the outlet pipe can be approximately 1/2 to 3/4 of the distance from the wall.
    0 14 to the outer periphery of the rotor. In addition, the configuration of the outlet tube 7 and the partition 5 must be such that there are no other openings in the partition 5 (except for the upper part of the partition) or in a common silicon carbide plate 15. The preferred location of the outlet pipe 7 is. Dits at the junction side
    0 and the lower walls (Fig. 3-5). The passage in the discharge pipe is straight, gradually decreasing with a constant width, and the inclination of the top wall represents a modification of FIG. 6
    Two variants of the flow pattern in the exhaust pipe 7 are shown in FIG. 2 and 6. The liquid flows through the exhaust pipe 7 in the direction of the arrow 19, small bubbles 20, which are forcefully driven into the exhaust pipe 7 under the action of a rotating gas distributor, move along a rounded up trajectory, as shown
    five
    arrow 21. On the inner surface of the eejpxHefl wall 22, small bubbles are collected and combined into 23-large bubbles and then discharged through the inlet of the outlet pipe 7 through the projector arrow 24 with their own lifting force acting on the inclined upper surface of the exhaust pipe 7, In some cases, a stronger action of the rotating gas distributor is desirable, and a higher level of turbulence caused by such an action may cause some large bubbles 25 to enter the exhaust section. (shown by streak 26), the occurrence of which is undesirable because they rise to the surface and form surface turbulence that can trap floating dross or oxide films into the metal stream, which eliminates the removal of solid inclusions.
    According to the invention, small bubbles, both under normal and enhanced operating conditions, and larger bubbles are removed under normal conditions. However, at higher velocities of the gas distributor on the upper wall 22, an outlet of a downward step 27 or a protrusion is provided on the top wall 22 next to the outlet end of the pipe 7. Large bubbles moving to the exhaust compartment are momentarily delayed by the step 7. Down When the turbulence momentarily decreases at the entrance to the outlet pipe 7, the turbulence due to a constant change in the nature of the flow inside the refined zone b, the large bubbles 24 exit V. of the input end outlet pipe 7 according to arrow 24 as l large bubbles 23.
    I.
    The baffle 5 is made as high as possible so that it can remove the dross layer when entering the inlet compartment 11. Under normal conditions, when the system is not in operating condition, i.e. not during refining, the liquid level drops to the toe of the inlet or outlet section, which is lower. The upper part of the priborodka is located below this level, for example, 37 mm so as not to hinder the free movement of the dross from the second refining zone to the entrance.
    The proposed device can be used not only to increase the melt flow rate through the system, but also to provide a higher degree of refining by increasing the rotational speed of rotating nozzles and gas flows at a normal flow rate. In addition, any number of flow rate combinations rotational speed and gas flow to achieve the highest possible pressure drop.
    ZS 7 20 19 21
    17 (rig.2
    FIG. H
    ff
    权利要求:
    Claims (3)
    [1]
    1. A device for refining molten aluminum, including the inlet compartment, the first and second refining compartments separated by a partition, and the outlet ,, separated from the first refining compartment by a wall, the last three compartments having a common lower wall, the lower part of the second refining compartment is connected to the exhaust compartment on a common bottom surface, the inlet of the exhaust pipe is communicated with a second refining compartment, and the outlet with a discharge compartment in each raff A rotary gas distribution device in the form of a shaft with a drive and a rotor is installed on the left side, with the aim that, in order to increase productivity, the upper wall of the exhaust pipe is inclined downward from the inlet end to the outlet one at an angle of 5-15 ° to the horizontal and the ends of the exhaust pipe are washed to the partition and the wall separating the first refining compartment from the inlet.
    [2]
    2. The device according to π. 1, characterized in that the connection of the upper and side walls facing the rotor is rounded or chamfered.
    [3]
    3. The device according to π. 1, characterized in that in the upper wall of the exhaust pipe at the inlet is made you. stu-
    -SU L 058510
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3743263A|1971-12-27|1973-07-03|Union Carbide Corp|Apparatus for refining molten aluminum|
    US3870511A|1971-12-27|1975-03-11|Union Carbide Corp|Process for refining molten aluminum|
    US4024056A|1975-07-21|1977-05-17|Swiss Aluminium Ltd.|Filtering of molten metal|US4390364A|1981-08-03|1983-06-28|Aluminum Company Of America|Removal of fine particles from molten metal|
    NL8220318A|1981-08-03|1983-05-02|Aluminum Co Of America|METHOD FOR TREATING MELTED ALUMINUM|
    US4397687A|1982-05-21|1983-08-09|Massachusetts Institute Of Technology|Mixing device and method for mixing molten metals|
    JPS60204842A|1984-03-29|1985-10-16|Showa Alum Corp|Treatment of molten magnesium|
    US4784374A|1987-05-14|1988-11-15|Union Carbide Corporation|Two-stage aluminum refining vessel|
    AT176415T|1991-11-11|1999-02-15|Multiserv Int Ltd|SMOKE REDUCTION IN METAL CASTING|
    DE19504415B4|1994-06-24|2004-12-02|Denso Corp., Kariya|Holding furnace for a molten metal and method for receiving molten metal in such a furnace|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/142,444|US4290588A|1980-04-21|1980-04-21|Apparatus for refining molten aluminum|
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