An on-line refining apparatus for producing secondary aluminum

Abstract

The present application belongs to the technical field of equipment for producing aluminum alloy, and particularly relates to an online refining equipment for preparing recycled aluminum. The present application provides an online refining equipment for preparing recycled aluminum, which can simultaneously connect three aluminum melting machines through the following manner: setting a communication port, a side groove body, a transverse protruding plate, a plug-in plate rack body unit, an inverted slot, a rotating dual-purpose hole plate unit, a motor, and a stirring column on a flow tank body. The refining equipment can simultaneously connect three aluminum melting machines. When the refining equipment connects only one aluminum melting machine, the side groove body can be effectively closed to avoid the harmful phenomenon that the aluminum liquid rotates in the side groove body and cannot flow. The functions of air supply, refining agent addition, and stirring of the refining equipment are combined into one, and the position of the combined structure can be adjusted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of equipment for producing aluminum alloy, and particularly relates to an online refining equipment for preparing recycled aluminum. BACKGROUND

[0002] Generally, the production steps of aluminum alloy mainly include the following four steps: melting, casting, processing, and heat treatment. Among them, the above refining operation is located in the melting step. On the other hand, compared with primary aluminum, recycled aluminum has more impurities in the raw material, so the above refining operation is more critical.

[0003] The main purpose of the refining operation is to remove the gas and impurities in the aluminum liquid, and the common methods mainly include two kinds, one is the gas blowing method, and the other is the refining agent method. The principles of the two are different, but both need to insert the feeding pipe into the aluminum liquid, send in argon, nitrogen or refining agent, and the refining effect is better when cooperating with stirring operation.

[0004] Correspondingly, the refining equipment used in the preparation of recycled aluminum is generally a refining tank. The aluminum liquid flows in the refining tank, cooperates with the previous degassing and deslagging operation, and the subsequent deslagging operation, so as to realize the basic refining effect.

[0005] On the other hand, the flow refining method using the above refining tank is an online refining. In contrast, the degassing and deslagging operation in a single refining kettle without flow is a non-online refining. The advantage of the former is high efficiency, and the advantage of the latter is low requirement for the cooperation degree between each process step in the refining operation.

[0006] For example, the Chinese utility model patent with the patent announcement number CN207699649U and the announcement date of 2018.08.07 discloses a three-chamber refining tank, the structure of which comprises: a first refining chamber, a second refining chamber and a liquid transfer chamber, the first refining chamber and the second refining chamber are communicated through a connecting pipeline, the first refining chamber is provided with a stopper, a partition plate is arranged between the second refining chamber and the liquid transfer chamber to separate the two chambers, the partition plate is provided with a transfer injection pipe I which communicates the second refining chamber and the liquid transfer chamber, the transfer injection pipe I is provided with a filter screen I at the pipe opening of one end connected with the second refining chamber, the transfer injection pipe I is provided with a filter screen II at the pipe opening of one end connected with the liquid transfer chamber, and the liquid transfer chamber is further provided with a transfer injection pipe II connected into the liquid transfer chamber, and the transfer injection pipe II is provided with a filter screen III at the pipe opening of one end of the liquid transfer chamber.

[0007] The structure principle and advantages of the refining tank in the utility model patent are as follows: the two-stage filtration of the melt in the refining tank before entering the liquid transfer chamber can filter out a large amount of inclusions before entering the liquid transfer chamber, and the filter screen III arranged on the transfer injection pipe II can greatly improve the utilization rate of the melt in the liquid transfer chamber, so as to reduce the inclusions in the cast ingot after casting.

[0008] However, in actual use, this refining tank has at least two shortcomings, which are also the technical problems that this invention aims to solve:

[0009] First, it only has one feeding position, namely the stopper rod, so it cannot meet the more varied actual production conditions relatively efficiently, such as when three aluminum melting machines need to be refined together.

[0010] Secondly, both the first and second refining chambers lack a stable and adjustable high-efficiency gasification and refining agent addition structure, so slag removal can only be passively performed by filters, which is very inefficient.

[0011] Therefore, in summary, there is an urgent need for a new type of online refining equipment with multiple feeding methods and more flexible functions for adding gas and refining agents, in order to prepare various aluminum alloys, especially recycled aluminum with greater demand for degassing and slag removal. Summary of the Invention

[0012] This invention provides an online refining device for the preparation of recycled aluminum. By incorporating a connecting port, side tank, transverse protrusion plate, insert plate frame unit, inverted slot, rotating dual-purpose perforated plate unit, motor, and stirring column into the flow tank, the following features are achieved: 1. The refining device can simultaneously connect to three aluminum melting machines; 2. When connecting to only one aluminum melting machine, the side tank can be effectively closed, preventing the harmful phenomenon of molten aluminum swirling and failing to flow; 3. The refining device integrates the functions of gas addition, refining agent addition, and stirring into a single unit, and the position of this integrated structure is adjustable.

[0013] The technical solution adopted by the present invention to solve the above problems is: an online refining equipment for the preparation of recycled aluminum, the structure of which includes a flow tank, a motor, and a stirring column, and further includes two connecting ports respectively disposed on two side plates of the flow tank, a side channel disposed on the connecting ports, two transverse protrusions respectively disposed on both sides of the connecting ports, a plate holder unit that engages with the four transverse protrusions and is used to close the side channel, an inverted slot disposed on the upper surface of the plate holder unit and used to engage with the upper surface of the side plate of the flow tank after being pulled out when aluminum liquid is injected into the side channel, and a rotating dual-purpose perforated plate unit disposed on the plate holder unit and used to install the motor and the stirring column.

[0014] A further preferred technical solution is that the insert plate frame unit includes two vertical plates for setting the rotating dual-purpose perforated plate unit, and two vertical slots respectively set on the two vertical sides of the vertical plates, opened downward from the bottom surface of the inverted slot, and used for inserting and engaging the transverse protrusion plate.

[0015] A further preferred technical solution is that the insert plate frame unit further includes two openings disposed on the vertical plate and used for inserting and installing the rotary dual-purpose perforated plate unit.

[0016] A further preferred technical solution is that the opening is provided on the inverted slot and the vertical slot.

[0017] A further preferred technical solution is that the rotary dual-purpose perforated plate unit includes two rods respectively inserted into the two openings, several flow direction plates with one end set on one of the rods and the other end pressed on the other rod, and an opening plate set on adjacent flow direction plates for installing the stirring column, air inlet pipe, or refining agent pipe.

[0018] A further preferred technical solution is that the rotary dual-purpose perforated plate unit further includes an anti-falling connecting plate disposed on all the flow direction plates and used to press against the rod body.

[0019] A further preferred technical solution is that the rotary dual-purpose perforated plate unit further includes an anti-slip limiting sleeve sleeved on the rod body, located in the vertical groove, and used to press down the upper surface of the side plate of the flow groove.

[0020] A further preferred technical solution is that the rotary dual-purpose perforated plate unit also includes engaging grooves respectively disposed on both sides of the perforated plate.

[0021] A further preferred technical solution is that the number of flow direction plates is 4 and the number of perforated plates is 3.

[0022] A further preferred technical solution is that the motor and the stirring column are arranged on the centrally located perforated plate. Attached Figure Description

[0023] Figure 1 This is a top-down view showing the usage of the invention with only one aluminum melting machine connected. In this case, the two side tanks are idle.

[0024] Figure 2 This is a schematic diagram illustrating the harmful backflow pattern that occurs in the side channel if the insert plate frame unit is not present in this invention.

[0025] Figure 3 This is a top-down view illustrating the usage of the invention in connection with three aluminum melting machines, where both side tanks are in use.

[0026] Figure 4 This is a schematic diagram illustrating the method of using the insert frame unit on the transverse protrusion plate in this invention.

[0027] Figure 5This is a top-down view of the structure of the rotating dual-purpose perforated plate unit in this invention.

[0028] Figure 6 This is a schematic diagram illustrating the method of using the insert plate frame unit on the side plate of the flow channel in this invention.

[0029] Figure 7 This is a schematic diagram showing the position and shape of the slot used for inversion in this invention.

[0030] Figure 8 This is a schematic diagram showing the position and shape of the locking groove in this invention.

[0031] The meanings of the markings in the diagram are as follows:

[0032] a) Inlet pipe; b) Refining agent pipe; c) Direction of aluminum liquid flow; d) Upper surface of aluminum liquid; e)

[0033] Flow tank 11, motor 12, stirring column 13;

[0034] 1. Connecting port; 2. Side groove; 3. Horizontal protrusion plate; 4. Insert plate frame unit; 5. Inverted slot; 6. Rotary dual-purpose perforated plate unit.

[0035] Vertical plate 401, vertical groove 402, opening 403, rod 601, flow direction plate 602, opening plate 603, anti-fall connecting plate 604, anti-slip limit sleeve 605, locking groove 606. Detailed Implementation

[0036] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0037] As attached Figures 1-8 As shown, an online refining device for preparing recycled aluminum includes a flow tank 11, a motor 12, and a stirring column 13. It also includes two connecting ports 1 respectively disposed on two side plates of the flow tank 11, a side channel 2 disposed on the connecting ports 1, two transverse protruding plates 3 respectively disposed on both sides of the connecting ports 1, a plate holder unit 4 that engages with the four transverse protruding plates 3 and is used to close the side channel 2, an inverted slot 5 disposed on the upper surface of the plate holder unit 4 and used to engage with the upper surface of the side plate of the flow tank 11 after being pulled out when molten aluminum is injected into the side channel 2, and a rotating dual-purpose perforated plate unit 6 disposed on the plate holder unit 4 and used to install the motor 12 and the stirring column 13.

[0038] In this embodiment, the flow tank 11 is a rectangular box without a top plate, with one end for adding molten aluminum and the other end for obtaining clean molten aluminum. The air inlet pipe a, refining agent pipe b, and stirring column 13 are located upstream of the slag removal structure. Thus, the refining effect of the recycled molten aluminum is fully achieved, and the degassing and slag removal operations are all effective and relatively efficient online.

[0039] Secondly, the addition of the two side tanks 2 ensures that the online refining equipment can have three aluminum liquid addition positions, or it can add aluminum liquid or connect to the aluminum material melting machine only at the flow tank 11, ensuring that its use is more flexible.

[0040] However, the problem that arises is that when the two side tanks 2 are idle, the connecting port 1 becomes harmful. The molten aluminum will stagnate in the "dead end" of the side tank 2, that is, the molten aluminum flows back in the direction d, which makes it impossible for this part of the molten aluminum to achieve a refining effect, or even to flow out smoothly.

[0041] Correspondingly, this is the first function of the insert plate frame unit 4, namely: to block and close the communication port 1, which can be done by inserting it downwards onto the four transverse protruding plates 3.

[0042] Furthermore, the second function of the insert plate frame unit 4 requires the cooperation of the inverted slot 5. That is, when the refining equipment is simultaneously connected to three melting machines, and the two side tanks 2 are in normal use, the connecting port 1 does not need to be closed. Therefore, the insert plate frame unit 4 is moved and placed on the side plate of the downstream flow tank 11, where the inverted slot 5 engages to prevent it from falling off.

[0043] More importantly, because the side plate of the flow tank 11 is relatively long, the insertion plate frame unit 4 can flexibly choose its locking and installation position. At this time, the rotary dual-purpose orifice plate unit 6, along with the air inlet pipe a, refining agent pipe b, and stirring column 13, can also flexibly choose different working positions to ensure that the final degassing, slag removal, and stirring operations have suitable effective timing, which is very important for the aluminum liquid refining effect.

[0044] Finally, the rotary dual-purpose perforated plate unit 6 is characterized by the fact that when the inverted slot 5 is facing up or down, the installation of the air inlet pipe a, the refining agent pipe b, and the stirring column 13 is effective, ensuring that the insert plate frame unit 4 can effectively perform refining operations on the transverse protruding plate 3 and on the side plate of the flow tank 11.

[0045] However, it should be noted that during the above-mentioned up-and-down flipping process, the air inlet pipe a and the refining agent pipe b only need to be unplugged and plugged back in, while the motor 12 and the stirring column 13 need to be removed and reinstalled to ensure that the motor 12 is always on top and the stirring column 13 is always inserted into the molten aluminum.

[0046] The insert plate frame unit 4 includes two vertical plates 401 for mounting the rotating dual-purpose perforated plate unit 6, and two vertical slots 402 respectively disposed on the two vertical sides of the vertical plates 401, opened downward from the bottom surface of the inverted slot 5, and used for inserting and engaging the transverse protruding plate 3.

[0047] In this embodiment, the side plates of the transverse protrusion plate 3 and the flow channel 11 are flush and of equal thickness.

[0048] Therefore, on the vertical plate 401, the inverted slot 5 and the vertical slot 402 are also aligned left and right and of equal width, and both can be excavated and formed on the vertical plate 401 in one go.

[0049] On the other hand, the side without the inverted slot 5 is used to abut against the inner bottom surface of the flow tank 11 and the side tank 2, ensuring that when the side tank 2 is idle, the connecting opening 1 should not leak aluminum liquid as much as possible. Similarly, the width of the vertical slot 402 should not be too large, just enough to insert the horizontal protrusion 3.

[0050] The insert plate frame unit 4 also includes two openings 403 disposed on the vertical plate 401 and used for inserting and installing the rotating dual-purpose perforated plate unit 6.

[0051] In this embodiment, the rotating dual-purpose perforated plate unit 6 needs to be used both upwards and downwards, so the two openings 403 correspond to the "rotation center" and "limiting end" of the rotating dual-purpose perforated plate unit 6, respectively.

[0052] The opening 403 is provided on the inverted slot 5 and the vertical slot 402.

[0053] In this embodiment, the opening 403 is positioned to vertically span the areas of the inverted slot 5 and the vertical slot 402. The advantage of this arrangement is that:

[0054] When the inverted slotted 5 engages with the side plate of the flow tank 11, the aforementioned "rotation center" and "limiting end" can rub against the side plate of the flow tank 11 to prevent slippage, ensuring that once the optimal points for the gas injection position, refining agent injection position, and stirring position of the online refining equipment are determined, it is difficult for accidental slippage to occur.

[0055] The rotary dual-purpose perforated plate unit 6 includes two rods 601 respectively inserted into the two openings 403, a plurality of flow direction plates 602 with one end set on one of the rods 601 and the other end pressed on the other rod 601, and an opening plate 603 set on adjacent flow direction plates 602 and used to install the stirring column 13 or the air inlet pipe a or the refining agent pipe b.

[0056] In this embodiment, the rod 601 that is fixedly connected to the flow direction plate 602 is the aforementioned "rotation center", and the other is the aforementioned "limiting end".

[0057] Of course, it should be noted that since the two rods 601 are of equal height, the perforated plate 603 is always used at an angle, but this will not affect the normal gas addition, refining agent addition and stirring operation at all.

[0058] The rotary dual-purpose perforated plate unit 6 also includes an anti-falling connecting plate 604 disposed on all the flow direction plates 602 and used to press against the rod body 601.

[0059] In this embodiment, the anti-fall connecting plate 604 has at least the following two functions:

[0060] First, the original relatively independent flow direction plates 602 are connected together to increase the structural stability of the entire rotary dual-purpose perforated plate unit 6.

[0061] Second, the other end of the originally exposed flow direction plate 602 is sealed to ensure that the perforated plate 603 will not fall off when its position is adjusted.

[0062] Wherein, the long side direction of the flow direction plate 602 is the forward direction c of the aluminum liquid.

[0063] Furthermore, for the gasification, refining agent addition, and stirring operations, the "coarse adjustment" function of the position adjustment action is to directly slide the entire insert plate frame unit 4, while the "fine adjustment" function is to independently slide each of the perforated plates 603 on the flow direction plate 602.

[0064] However, when the insert plate frame unit 4 is used on the transverse protruding plate 3, the above-mentioned "coarse adjustment" function is not available; only the above-mentioned "fine adjustment" function is available.

[0065] The rotary dual-purpose perforated plate unit 6 also includes an anti-slip limiting sleeve 605 that is sleeved on the rod body 601, located in the vertical groove 402, and used to press down the upper surface of the side plate of the flow groove 11.

[0066] In this embodiment, the main body of the rotary dual-purpose perforated plate unit 6 is made of steel, while the anti-slip limiting sleeve 605 is made of ordinary rubber. The latter mainly serves the following two purposes:

[0067] First, the two ends of the anti-slip limiting sleeve 605 are respectively properly locked onto the two inner sides of the vertical groove 402, so that the rotating dual-purpose perforated plate unit 6 avoids unnecessary left and right displacement as much as possible;

[0068] Secondly, the anti-slip limiting sleeve 605 itself has a large static friction coefficient, which ensures that when it is pressed against the upper surface of the side plate of the flow channel 11, the friction and anti-slip effect of the insert plate frame unit 4 is better.

[0069] Of course, when the insert plate frame unit 4 is inverted, the inverted slot 5 is pressed entirely on the side plate surface of the flow channel 11. The anti-slip limiting sleeve 605 is only appropriately deformed to provide friction and anti-slip, and the inverted slot 5 should not be suspended in the air.

[0070] The rotary dual-purpose perforated plate unit 6 also includes engaging grooves 606 respectively disposed on both sides of the perforated plate 603.

[0071] In this embodiment, the vertical cross-sectional shape of the flow direction plate 602 and the perforation plate 603 is rectangular. Each perforation plate 603 is appropriately engaged with two adjacent flow direction plates 602 through two engaging grooves 606, ensuring that the air inlet pipe a, refining agent pipe b and stirring column 13 can be slidably adjusted in position without actively sliding or shifting.

[0072] The number of flow direction plates 602 is 4, and the number of perforated plates 603 is 3.

[0073] In this embodiment, the position of the stirring column 13 is lower than that of the air inlet pipe a and the refining agent pipe b, so as to avoid the rotating stirring action hitting the two pipes.

[0074] The motor 12 and the stirring column 13 are mounted on the centrally located perforated plate 603.

[0075] In this embodiment, the above-mentioned gasification and refining agent addition operations have a synergistic effect when combined with the stirring operation. Therefore, the stirring structure is set in the center to ensure that the final refining effect is more comprehensive and efficient.

[0076] Correspondingly, this online refining equipment also needs to be used in conjunction with existing argon or nitrogen filling equipment and refining agent addition equipment. Downstream of the insert plate frame unit 4, there is also an existing slag removal structure.

[0077] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. An online refining device for the preparation of recycled aluminum, comprising a flow tank (11), a motor (12), and a stirring column (13), characterized in that: It also includes two connecting ports (1) respectively set on the two side plates of the flow tank (11), a side tank (2) set on the connecting port (1), two transverse protrusions (3) respectively set on both sides of the connecting port (1), a plate holder unit (4) that is engaged with the four transverse protrusions (3) and used to close the side tank (2), an inverted slot (5) set on the upper surface of the plate holder unit (4) and used to engage the upper surface of the side plate of the flow tank (11) after being pulled out when aluminum liquid is injected into the side tank (2), and a rotating dual-purpose perforated plate unit (6) set on the plate holder unit (4) and used to install the motor (12) and the stirring column (13).

2. The online refining equipment for preparing recycled aluminum according to claim 1, characterized in that: The insert plate frame unit (4) includes two vertical plates (401) for setting the rotating dual-purpose perforated plate unit (6), and two vertical slots (402) respectively set on the two vertical sides of the vertical plates (401), opened from the bottom surface of the inverted slot (5) and used to insert and engage the transverse protrusion plate (3).

3. The online refining equipment for preparing recycled aluminum according to claim 2, characterized in that: The insert plate frame unit (4) also includes two openings (403) disposed on the vertical plate (401) and used for inserting and installing the rotating dual-purpose perforated plate unit (6).

4. The online refining equipment for preparing recycled aluminum according to claim 3, characterized in that: The opening (403) is provided on the inverted slot (5) and the vertical slot (402).

5. The online refining equipment for preparing recycled aluminum according to claim 4, characterized in that: The rotary dual-purpose perforated plate unit (6) includes two rods (601) respectively inserted into the two openings (403), a plurality of flow direction plates (602) with one end set on one of the rods (601) and the other end pressed on the other rod (601), and an opening plate (603) set on adjacent flow direction plates (602) for installing the stirring column (13) or the air inlet pipe (a) or the refining agent pipe (b).

6. The online refining equipment for preparing recycled aluminum according to claim 5, characterized in that: The rotary dual-purpose perforated plate unit (6) also includes an anti-falling connecting plate (604) disposed on all the flow direction plates (602) and used to press on the rod (601).

7. The online refining equipment for preparing recycled aluminum according to claim 5, characterized in that: The rotary dual-purpose perforated plate unit (6) also includes an anti-slip limiting sleeve (605) sleeved on the rod body (601), located in the vertical groove (402), and used to press down the upper surface of the side plate of the flow groove (11).

8. The online refining equipment for preparing recycled aluminum according to claim 5, characterized in that: The rotating dual-purpose perforated plate unit (6) also includes engaging grooves (606) respectively disposed on both sides of the perforated plate (603).

9. The online refining equipment for preparing recycled aluminum according to claim 5, characterized in that: The number of flow direction plates (602) is 4, and the number of perforated plates (603) is 3.

10. An online refining device for preparing recycled aluminum according to claim 9, characterized in that: The motor (12) and the stirring column (13) are mounted on the centrally located perforated plate (603).

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