A device for purifying molten aluminum in a smelting furnace

Abstract

The application discloses a device for purifying aluminum liquid of a smelting furnace, relates to the technical field of hole drilling and direct pouring production of a casting smelting furnace, and solves the technical problems of existing scum blockage of filter plates and product inclusion of scum and aluminum dragging in the extrusion process of a casting rod. The device comprises a smelting furnace and a filter box which are connected through an aluminum flow channel. An aluminum liquid sedimentation tank is arranged on one side of the aluminum flow channel between the smelting furnace and the filter box. The end of the aluminum flow channel close to the smelting furnace is connected with an inlet of the aluminum liquid sedimentation tank, the end of the aluminum flow channel close to the filter box is connected with an outlet, a partition block is arranged on the aluminum flow channel between the inlet and the outlet, and the aluminum liquid direct flow is blocked. The device ensures the flow of the filtered aluminum liquid and the purification degree of the aluminum liquid, and improves the quality of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting and smelting furnace drilling and direct pouring production, and more particularly to a device for purifying molten aluminum in a smelting furnace. BACKGROUND

[0002] When molten aluminum is processed, it is generally smelted in a smelting furnace. After the processing of the molten aluminum in the smelting furnace is completed, the molten aluminum in the smelting furnace needs to be discharged into a subsequent processing container. For example, the molten aluminum in the smelting furnace is discharged through the bottom furnace eye of the furnace group into an aluminum liquid flow channel, the molten aluminum flows directly into a filter box through the flow channel for filtration, and the aluminum water is filtered and then cast. However, there are still the following defects:

[0003] 1. The molten aluminum in the smelting furnace is discharged from the bottom furnace eye of the furnace group, and the impurities deposited at the bottom of the furnace are brought out together with the molten aluminum flowing process. The molten aluminum flows directly into the filter box through the flow channel for filtration, resulting in the presence of 50mm dross above the ceramic filter plate in the filter box. The dross covers the top of the filter plate and blocks the filter holes of the filter plate. The flow rate of the molten aluminum after filtration is insufficient, which affects the production of the cast bar.

[0004] 2. When the molten aluminum flows from the furnace eye of the smelting furnace to the filter box, there is a problem of turbulence in the flowing process, the surface dross of the aluminum water increases, and the product appears to have slag inclusion and aluminum dragging during the extrusion process of the cast bar. SUMMARY

[0005] The purpose of the present application is to solve the technical problems of dross blocking the filter plate and the product appearing to have slag inclusion and aluminum dragging during the extrusion process of the cast bar. The present application provides a device for purifying molten aluminum in a smelting furnace, which has better purification effect on the molten aluminum and improves the quality of the product.

[0006] The technical solution adopted by the present application is as follows: a device for purifying molten aluminum in a smelting furnace, comprising a smelting furnace and a filter box connected through an aluminum flow channel, an aluminum liquid sedimentation tank is arranged on one side of the aluminum flow channel between the smelting furnace and the filter box. The end of the aluminum flow channel close to the smelting furnace is connected with the inlet of the aluminum liquid sedimentation tank, the end of the aluminum flow channel close to the filter box is connected with the outlet, and the aluminum flow channel between the inlet and the outlet is provided with a partition block for blocking the direct flow of the aluminum liquid.

[0007] Specifically, a bypass interface of the molten aluminum inlet and outlet is arranged at the middle position of the aluminum flow channel between the smelting furnace and the filter box; an aluminum liquid sedimentation tank is arranged at the bypass interface position of the flow channel; the middle part of the inlet and outlet flow channel is blocked by a partition block; the sedimentation tank is divided into two inner cavities, i.e., a sedimentation A cavity and a sedimentation B cavity; the internal height of the sedimentation A cavity is about 50 mm lower than that of the sedimentation B cavity (in a stepped form). The molten aluminum in the aluminum flow channel flows into the sedimentation A cavity of the aluminum liquid sedimentation tank from the bypass inlet of the flow channel; the stepped structure of the internal part of the sedimentation A cavity blocks the flow of heavy inclusions in the molten aluminum, and the inclusions are deposited at the bottom of the sedimentation A cavity. When the molten aluminum in the sedimentation A cavity continuously rises and is leveled with the molten aluminum in the inlet flow channel, the molten aluminum in the sedimentation A cavity flows out from the middle hidden flow channel of the aluminum liquid sedimentation tank to the sedimentation B cavity, and the surface floating dross of the molten aluminum in the sedimentation A cavity stays on the surface of the molten aluminum in the sedimentation A cavity. The molten aluminum in the sedimentation A cavity is deposited again in the sedimentation B cavity and then flows out from the bypass outlet of the aluminum flow channel to the filter box for filtration.

[0008] The aluminum liquid sedimentation tank comprises an inlet, an outlet, a sedimentation B cavity, a dry port, a sedimentation A cavity and a hidden flow channel; the internal height of the sedimentation A cavity is 50-80 mm lower than that of the sedimentation B cavity; one side of the bottom of the sedimentation B cavity is connected with the sedimentation A cavity through the hidden flow channel; one side of the upper part of the sedimentation A cavity is communicated with the aluminum flow channel through the inlet; one side of the upper part of the sedimentation B cavity is communicated with the aluminum flow channel through the outlet; and one side of the bottom of the sedimentation A cavity is provided with the dry port.

[0009] The sedimentation A cavity is provided with a dross removing assembly, which can remove the concentrated dross during the processing.

[0010] The dross removing assembly comprises a grid plate, a dross removing assembly and a dross bucket; the dross removing assembly is arranged between the grid plate and the dross bucket; one end of the grid plate is connected with one end of the inlet; the other end of the grid plate is connected with a corner of the sedimentation A cavity; the dross removing assembly is installed on the pool wall of the sedimentation A cavity, and one end of the dross removing assembly extends into the sedimentation A cavity, and the other end extends into the dross bucket; when it is needed to use, the dross removing assembly is extended into the sedimentation A cavity for salvage, which can prolong the service life and improve the work efficiency.

[0011] The dross removing assembly comprises a T-shaped base, a four-bar linkage wind brace hinge and a mesh belt conveyor; the mesh belt conveyor is connected with the T-shaped base through the four-bar linkage wind brace hinge on both sides; and the T-shaped base is connected with the sedimentation A cavity; the four-bar linkage wind brace hinge can adjust the inclination angle of the mesh belt conveyor, so that the mesh belt conveyor can be freely extended and retracted.

[0012] The bottom of the sedimentation A cavity is provided with a sediment removing assembly corresponding to the dry port; when the amount of the sediment reaches a certain amount, the sediment can be cleaned out.

[0013] The deslagging assembly comprises a telescopic air cylinder, a sliding block, a blocking plate and a scraper, the telescopic rod of the telescopic air cylinder is connected with the scraper through the sedimentation cavity A, the upper part of the scraper is connected with one end of the blocking plate, the other end of the blocking plate is connected with the sliding block through the sedimentation cavity A, and the sliding block is slidingly connected with the telescopic air cylinder; the sediment above the scraper is supported by the blocking plate, so that the upper layer will not be greatly fluctuated even during cleaning.

[0014] The shape of the scraper corresponds to the section of the lower horizontal line of the sedimentation cavity A, so that the sediment can be completely pushed to the dry port.

[0015] The connection part of the blocking plate and the scraper is 5-10 mm away from the top of the scraper, so that the scraper can seal the blocking plate.

[0016] The bottom of the scraper is provided with a sharp corner, so that the sediment can be more easily pushed and scraped.

[0017] As the above technical scheme is adopted, the beneficial effects of the present application are as follows:

[0018] 1. The sedimentation tank is provided with two cavities, the floating dregs and the sediment in the aluminum liquid are retained in the sedimentation cavity A by the middle dark flow channel, the aluminum liquid from which the floating dregs and the sediment are removed is sent to the sedimentation cavity B, and then is sent to the original path to pass through the filter box. Since the floating dregs and the sediment are removed before entering the filter box, the problem that the floating dregs cover the filter plate and block the filter holes of the filter plate is solved, the problem that the flow rate of the aluminum liquid after filtration is insufficient and the production of the casting rod is affected is solved, and the problems that the product is clamped with dregs and aluminum is dragged during the extrusion process of the casting rod are solved.

[0019] 2. The floating dregs removing assembly is arranged beside the sedimentation cavity A, when the floating dregs are found to be more, the floating dregs removing assembly can be put into the sedimentation cavity A to clean the floating dregs in the sedimentation cavity A. According to the requirement, the floating dregs removing assembly is used for 5-10 minutes every time, so that the sedimentation cavity A can maintain a good state of storing floating dregs.

[0020] 3. The sediment dregs removing assembly is installed on the opposite side of the dry port at the bottom of the sedimentation cavity A. The sediment dregs at the bottom of the sedimentation cavity A can be cleaned every time, so that the sedimentation cavity A can maintain a good state of storing sediment dregs in continuous use. DETAILED DESCRIPTION

[0021] The present application will be described by examples and with reference to the accompanying drawings.

[0022] Figure 1 is a schematic diagram of the overall layout structure of the present application;

[0023] Figure 2 is a schematic diagram of the overhead structure of the sedimentation tank of the present application;

[0024] Figure 3is a schematic diagram of the B-B sectional structure of the sedimentation tank of the present application;

[0025] Figure 4 is a schematic diagram of the A-A sectional structure of the sedimentation tank of the present application;

[0026] Figure 5 is a schematic diagram of the top view structure of the sedimentation tank of the embodiment 3 of the present application;

[0027] Figure 6 is a schematic diagram of the B-B sectional structure of the sedimentation tank of the embodiment 3 of the present application;

[0028] Figure 7 is a schematic diagram of the partial structure of the scum-removing assembly of the embodiment 3 of the present application;

[0029] Figure 8 is a schematic diagram of the top view structure of the sedimentation tank of the embodiment 6 of the present application;

[0030] Figure 9 is a schematic diagram of the B-B sectional structure of the sedimentation tank of the embodiment 6 of the present application;

[0031] Figure 10 is a schematic diagram of the partial structure of the sediment-removing assembly of the embodiment 6 of the present application;

[0032] In the figure, the marks are: 1-melting furnace, 2-aluminum flow tank, 3-filtration box, 4-aluminum liquid sedimentation tank, 5-ridge block, 41-entrance, 42-discharge port, 43-sedimentation B cavity, 44-dry port, 45-sedimentation A cavity, 46-dark current channel, 47-grid plate, 48-scum-removing assembly, 49-scum bucket, 481-T-shaped base, 482-four-bar linkage wind brace hinge, 483-net belt conveyor, 6-sediment-removing assembly, 61-telescopic air cylinder, 62-sliding block, 63-block plate, 64-scraping plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application. Embodiment 1

[0035] AsFigures 1-4 As shown, this embodiment provides an apparatus for purifying molten aluminum in a smelting furnace 1, including a smelting furnace 1 and a filter box 3 connected by an aluminum flow channel 2. An aluminum molten sedimentation tank 4 is provided on one side of the aluminum flow channel 2 between the smelting furnace 1 and the filter box 3. The end of the aluminum flow channel 2 near the smelting furnace 1 is connected to the inlet 41 of the aluminum molten sedimentation tank 4, and the end of the aluminum flow channel 2 near the filter box 3 is connected to the outlet 42. A baffle block 5 is provided in the section of the aluminum flow channel 2 between the inlet 41 and the outlet 42 to block the direct flow of molten aluminum.

[0036] Specifically, an aluminum molten metal inlet / outlet bypass interface is designed in the middle of the aluminum flow channel 2 between the smelting furnace 1 and the filter box 3. An aluminum molten metal settling tank 4 is installed at the bypass interface. The inlet 41 and outlet 42 of the flow channel are blocked by a baffle block 5 in the middle. The settling tank is divided into two inner chambers: settling chamber A 45 and settling chamber B 43. The internal height of settling chamber A 45 is about 50mm lower than that of settling chamber B 43 (forming a stepped structure). The aluminum molten metal in the aluminum flow channel 2 flows into the settling chamber A 45 of the aluminum molten metal settling tank 4 from the bypass inlet 41. The stepped structure inside settling chamber A 45 blocks the flow of heavy inclusions in the aluminum molten metal, and the inclusions settle to the bottom of the settling chamber A 45. As the molten aluminum in sedimentation chamber A 45 continues to rise and reaches the same level as the molten aluminum in the inlet 41 flow channel, the molten aluminum in sedimentation chamber A 45 flows out from the dark flow channel 46 in the middle of the aluminum molten sedimentation tank 4 to sedimentation chamber B 43. The suspended oxide scum on the surface of the molten aluminum in sedimentation chamber A 45 remains on the surface of the molten aluminum in sedimentation chamber A 45. After sedimentation again in sedimentation chamber B 43, the molten aluminum in sedimentation chamber A 45 flows out through the bypass outlet 42 of the aluminum flow channel 2 to the filter box 3 for filtration. Example 2

[0037] Based on Example 1, the aluminum liquid sedimentation tank 4 includes an inlet 41, an outlet 42, a sedimentation chamber B 43, a drain port 44, a sedimentation chamber A 45, and a hidden flow channel 46. The internal height of the sedimentation chamber A 45 is 50-80 mm lower than that of the sedimentation chamber B 43. The bottom side of the sedimentation chamber B 43 is connected to the sedimentation chamber A 45 through the hidden flow channel 46. The upper side of the sedimentation chamber A 45 is connected to the aluminum flow channel 2 through the inlet 41. The upper side of the sedimentation chamber B 43 is connected to the aluminum flow channel 2 through the outlet 42. The bottom side of the sedimentation chamber A 45 has a drain port 44. Example 3

[0038] Based on Example 2, such as Figures 5-7 As shown, the sedimentation chamber A 45 is equipped with a scum removal component 48, which can remove the scum that has been collected during the processing. Example 4

[0039] On the basis of embodiment 3, the scum-removing assembly 48 comprises a grid plate 47, a scum-removing assembly 48, a scum bucket 49, the scum-removing assembly 48 is arranged between the grid plate 47 and the scum bucket 49, one end of the grid plate 47 is connected with one end of the inlet 41, the other end of the grid plate 47 is connected with a corner of the sedimentation chamber A 45, the scum-removing assembly 48 is installed on the pool wall of the sedimentation chamber A 45, one end of the scum-removing assembly 48 extends into the sedimentation chamber A 45, and the other end of the scum-removing assembly 48 extends into the scum bucket 49; the scum-removing assembly 48 is only extended into the sedimentation chamber A 45 for salvage when it is needed to be used, the service life can be prolonged, and the work efficiency is improved. Embodiment 5

[0040] On the basis of embodiment 4, the scum-removing assembly 48 comprises a T-shaped base 481, a four-bar linkage wind brace hinge 482, and a mesh belt conveyor 483, the mesh belt conveyor 483 is connected with the T-shaped base 481 through the four-bar linkage wind brace hinge 482 on both sides, and the T-shaped base 481 is connected with the sedimentation chamber A 45; the four-bar linkage wind brace hinge 482 can adjust the inclination angle of the mesh belt conveyor 483, and the mesh belt conveyor 483 can be freely retracted and extended. Embodiment 6

[0041] On the basis of embodiment 2, as shown in Figures 8-10 the bottom of the sedimentation chamber A 45 is provided with a sediment-removing assembly 6 corresponding to the draining port 44, when the amount of the sediment reaches a certain amount, the sediment can be cleaned out. Embodiment 7

[0042] On the basis of embodiment 6, the sediment-removing assembly 6 comprises a telescopic cylinder 61, a sliding block 62, a blocking plate 63, and a scraper 64, the telescopic rod of the telescopic cylinder 61 is connected with the scraper 64 through the sedimentation chamber A 45, the upper part of the scraper 64 is connected with one end of the blocking plate 63, the other end of the blocking plate 63 is connected with the sliding block 62 through the sedimentation chamber A 45, and the sliding block 62 is slidingly connected with the telescopic cylinder 61; the sediment above the scraper 64 is supported by the blocking plate 63, so that the upper layer does not fluctuate too much even when it is cleaned. Embodiment 8

[0043] On the basis of embodiment 6, the shape of the scraper 64 corresponds to the cross section of the lower horizontal line of the undercurrent channel 46 of the sedimentation chamber A 45, and the sediment can be completely pushed to the draining port 44. Embodiment 9

[0044] On the basis of embodiment 6, the connection between the blocking plate 63 and the scraper 64 is 5-10 mm away from the top of the scraper 64, and the scraper 64 can seal the blocking plate 63. Embodiment 10

[0045] On the basis of embodiment 6, the bottom of the scraper 64 is provided with a sharp corner, so that it is easier to push and scrape the sludge.

[0046] The working principle of the application is that the molten aluminum in the smelting furnace 1 is discharged through the aluminum flow channel 2, and due to the blocking of the partition block 5, the molten aluminum enters the sedimentation cavity A 45. Due to the blocking of the grid plate 47, under the impact of the inlet 41, the dross is concentrated in a corner. When a certain thickness is reached, the dross assembly 48 is lowered to transfer the dross to the dross bucket 49. The inside of the sedimentation cavity A 45 is in a stepped structure to block the flow of heavy inclusions in the molten aluminum. The inclusions are precipitated to the bottom of the sedimentation cavity A 45. When a certain thickness is reached, the sediment removal assembly 6 is used to discharge the sediment from the dry port 44. The molten aluminum in the middle is transferred to the sedimentation cavity B 43 through the undercurrent channel 46. The molten aluminum enters the sedimentation cavity B 43 and is precipitated again. Then it is discharged from the bypass outlet 42 of the aluminum flow channel 2 to the filter box 3 for filtration. After filtration, it flows to the crystallizer.

Claims

1. A device for purifying molten metal in a smelting furnace, comprising a smelting furnace (1) and a filter box (3) connected by an aluminium flow channel (2), characterised in that, The aluminum flow tank (2) between the smelting furnace (1) and the filter box (3) is provided with an aluminum liquid sedimentation tank (4) on one side, the end of the aluminum flow tank (2) close to the smelting furnace (1) is communicated with the inlet (41) of the aluminum liquid sedimentation tank (4), the end of the aluminum flow tank (2) close to the filter box (3) is connected with the outlet (42) of the aluminum liquid sedimentation tank (4), the aluminum flow tank (2) between the inlet (41) and the outlet (42) is provided with a partition block (5) for blocking the direct flow of aluminum liquid. The aluminum liquid sedimentation tank (4) comprises an inlet (41), an outlet (42), a sedimentation B cavity (43), a dry port (44), a sedimentation A cavity (45) and a dark current channel (46), the internal height of the sedimentation A cavity (45) is 50-80mm lower than that of the sedimentation B cavity (43), one side of the bottom of the sedimentation B cavity (43) is connected with the sedimentation A cavity (45) through the dark current channel (46), one side of the upper part of the sedimentation A cavity (45) is communicated with the aluminum flow tank (2) through the inlet (41), one side of the upper part of the sedimentation B cavity (43) is communicated with the aluminum flow tank (2) through the outlet (42), and one side of the bottom of the sedimentation A cavity (45) is provided with the dry port (44). The sedimentation A cavity (45) is provided with a dross removal assembly (48), and the bottom of the sedimentation A cavity (45) is provided with a sediment removal assembly (6) corresponding to the dry port (44).

2. A device for purifying aluminium melt in a smelting furnace according to claim 1, characterised in that The dross removal assembly (48) is arranged between the grid plate (47) and the dross bucket (49), one end of the grid plate (47) is connected with one end of the inlet (41), the other end of the grid plate (47) is connected with a corner of the sedimentation A cavity (45), the dross removal assembly (48) is installed on the pool wall of the sedimentation A cavity (45), one end of the dross removal assembly (48) extends into the sedimentation A cavity (45), and the other end of the dross removal assembly (48) extends into the dross bucket (49).

3. A device for purifying aluminium melt in a smelting furnace according to claim 2, characterised in that The dross removal assembly (48) comprises a T-shaped base (481), a four-bar linkage wind brace hinge (482) and a mesh belt conveyor (483), the mesh belt conveyor (483) is connected with the T-shaped base (481) through the four-bar linkage wind brace hinge (482) on both sides, and the T-shaped base (481) is connected with the sedimentation A cavity (45).

4. A device for purifying aluminium melt in a smelting furnace according to claim 3, characterised in that The sediment removal assembly (6) comprises a telescopic air cylinder (61), a sliding block (62), a blocking plate (63) and a scraper (64), the telescopic rod of the telescopic air cylinder (61) is connected with the scraper (64) through the sedimentation A cavity (45), the upper part of the scraper (64) is connected with one end of the blocking plate (63), the other end of the blocking plate (63) is connected with the sliding block (62) through the sedimentation A cavity (45), and the sliding block (62) is slidingly connected with the telescopic air cylinder (61).

5. A device for purifying molten aluminum in a smelting furnace according to claim 3, wherein The shape of the scraper (64) corresponds to the cross section of the lower horizontal line of the dark current channel (46) of the sedimentation A cavity (45).

6. A device for purifying molten aluminum in a smelting furnace according to claim 3, wherein The distance between the connection position of the blocking plate (63) and the scraper (64) and the top of the scraper (64) is 5-10mm. The bottom of the scraper (64) is provided with a sharp corner.

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