A furnace threshold transition device and slag removal method

Abstract

This invention relates to the field of furnace slag removal technology, and more specifically, to a furnace threshold transition device, comprising a slag guide plate and a slag-drawing plate. One end of the slag guide plate is a free end, and the other end is connected to the slag-drawing plate. The slag guide plate is inclined in a manner that gradually decreases towards the free end. A slag removal method includes scraping floating slag in the furnace onto a slag guide mechanism and allowing it to stand; after the liquid metal contained in the slag flows back into the furnace, scraping the slag on the slag guide mechanism into the slag-drawing plate; and transferring the accumulated slag in the slag-drawing plate to a reaction vessel for post-processing. The above-mentioned device and method can remove floating slag and avoid waste of molten aluminum, saving material consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of furnace slag removal, and more specifically, to a furnace threshold transition device and a slag removal method. Background Art

[0002] Generally, during the casting process, depending on the purity of the raw metal, some scum impurities (or oxide layer) will be produced on the surface of the molten metal to a greater or lesser extent. Since these scum will affect the purity of the molten metal, they must be removed regularly to avoid affecting the quality of the metal products.

[0003] The common method of removing slag from a furnace is to manually move the slag on the surface of the molten metal to the periphery of the inner wall of the furnace, and then the operator scoops up the slag with a ladle to remove impurities and avoid affecting the quality of the cast metal products.

[0004] At present, in addition to manual slag removal, there is also mechanical slag removal, such as publication number: CN2343556, which discloses a furnace metal slag rake remover, which mainly controls the movement of a rake spoon through a horizontal and vertical movement platform, and drives its extension movement with a rake spoon brake, so that it can be extended into the furnace according to needs, scrape off the slag on the surface of the molten metal, and pour the slag into the waste barrel outside the furnace, so that the slag removal work does not require the participation of staff in on-site operations, so as to ensure the work safety of on-site staff and improve the working environment. However, the slag removal method of the public solution is still to scoop up the slag on the surface, which will have the following problems:

[0005] 1. The alumina slag scraped out contains a certain amount of qualified aluminum water, resulting in a waste of aluminum ingots;

[0006] 2. The slag removal tool directly acts on the furnace threshold, causing the furnace threshold material to be damaged, resulting in a decrease in the life of the furnace and fire from the furnace door;

[0007] 3. The alumina slag that is scraped out can easily fall from the side of the reactor to the ground, thereby burning through the ground, posing a safety hazard of aluminum leakage. Summary of the invention

[0008] The object of the present invention is to overcome the deficiencies of the prior art and to provide a furnace threshold transition device and a slag removal method, which can remove slag and avoid wasting molten metal, thereby saving material loss.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a furnace threshold transition device, including a slag guide plate and a slag guide plate, one end of the slag guide plate is a free end, and the other end of the slag guide plate is connected to the slag guide plate, and the slag guide plate is inclined in a manner of gradually lowering toward the free end.

[0010] When the present invention is used, it is installed at the outlet of the furnace, and the free end of the slag guide plate extends into the furnace. When the furnace melts the solid metal, slag often emerges on the surface of the liquid metal, and the slag needs to be removed. The device is installed at the outlet of the furnace. When the slag is removed, since the end of the slag guide plate is extended in the furnace, the threshold of the furnace will not be damaged when the staff scrapes the slag, and the slag can be scraped onto the slag guide plate, which can protect the threshold of the furnace well, thereby increasing the service life of the furnace and preventing the furnace door from catching fire. In addition, since the slag guide plate is arranged to be inclined to the direction of the furnace, the slag scraped onto the slag guide plate will carry a certain amount of liquid metal. The liquid metal has fluidity. Under the action of gravity, the liquid metal flows back into the furnace to recover the liquid metal in the slag, and the liquid metal and the slag can be separated to save raw materials. After completing the solid-liquid separation, the staff will scrape the slag stagnant on the slag guide plate into the slag guide tray for collection. This device can effectively separate the liquid metal and slag in the furnace, reduce the liquid metal remaining on the slag, and reduce the loss of raw materials. In addition, by using this device to guide the scraping of the slag, the furnace threshold can be well protected, and the slag can be prevented from falling to the ground and burning through the ground, so it is safer and more reliable to use.

[0011] Furthermore, the slag guide plate includes a slag guide plate and a transition plate, wherein the slag guide plate is connected to the transition plate, one end of the slag guide plate is a free end, the transition plate is connected to the slag guide plate, and the end of the transition plate connected to the slag guide plate is lower than the end of the transition plate connected to the slag guide plate. The slag guide plate plays a role in guiding the slag. When the staff scrapes the slag, the slag scraping tool directly acts on the slag guide plate, which can avoid the slag scraping tool directly acting on the furnace threshold, causing the furnace threshold material to be scraped and damaged, resulting in a decrease in the furnace life and fire. The transition plate is used to keep the slag still. When the slag is on the transition plate, the residual liquid metal can flow back along the transition plate toward the furnace, thereby achieving a recycling effect.

[0012] Furthermore, the transition plate is provided with a plurality of filter holes. The liquid metal below the slag will be blocked by the slag and cannot flow back smoothly. Therefore, through the filter holes provided on the transition plate, the residual liquid metal can fall on the furnace body of the furnace through the filter holes and flow back into the furnace, so that the slag and the liquid metal can be better separated, so as to better save material energy.

[0013] Furthermore, baffles are provided on both sides of the transition plate. The baffles can limit the slag and liquid metal on the transition plate, preventing the liquid metal or slag from falling to the ground from both sides of the transition plate, thereby improving the safety of the device. In addition, the baffles can strengthen the transition plate, thereby enhancing the load-bearing performance of the transition plate.

[0014] Furthermore, the slag guide plate is arranged on the frame, and a slag drop opening is arranged on the slag guide plate, and a reaction kettle is arranged below the slag drop opening. The slag is accumulated in the slag guide plate, and the slag is directly transferred to the reaction kettle below through the slag drop opening, without the need for manual transfer of the slag, which reduces manpower and can prevent the slag from falling to the ground and burning through the ground during the transfer process, posing a safety hazard.

[0015] Furthermore, a height adjustment mechanism is provided at the bottom of the frame, through which the height of the frame can be adjusted, thereby indirectly adjusting the inclination angle of the transition plate, and adjusting according to actual conditions to make the liquid metal reflux smoother and the slag removal operation more appropriate.

[0016] Furthermore, the height adjustment mechanism is a cushion block, and the cushion block supports the frame. The height of the frame can be adjusted by replacing cushion blocks of different heights.

[0017] Furthermore, the height adjustment mechanism is a telescopic leg. The height of the frame can be adjusted by adjusting the length of the telescopic leg.

[0018] Furthermore, the height adjustment mechanism is a plurality of adjustment bolts arranged at the bottom of the frame, and the height of the frame can be adjusted by adjusting the adjustment bolts.

[0019] A slag removal method comprises the following steps:

[0020] S101: scraping the slag in the furnace to the slag guiding mechanism and letting it stay still;

[0021] S102: After the liquid metal contained in the slag flows back into the furnace, the slag on the slag guiding mechanism is scraped into the slag guiding plate;

[0022] S103: The accumulated slag in the slag guide tray is transferred to the reactor for post-processing.

[0023] Compared with the prior art, the beneficial effects of the present invention are: through the present device and the present slag removal method, the slag and liquid metal can be well separated, and the liquid metal can flow back to the furnace, thereby reducing material waste. In addition, the present device can avoid direct contact between the slag rake and the furnace threshold during the slag removal process, thereby damaging the furnace threshold and extending the service life of the furnace. The slag transfer distance can be reduced, making it safer to use, and the slag will not fall to the ground and burn through. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the middle threshold transition device of the present invention;

[0025] Figure 2 for Figure 1 A top view of

[0026] Figure 3 It is a schematic diagram of the use status of the middle threshold transition device of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Embodiment 1:

[0030] This embodiment discloses a furnace threshold transition device, such as Figure 3 As shown, the device is installed at the outlet of the furnace, where Figure 1 As shown, the device includes a slag guide plate and a slag guiding plate 201, the slag guide plate includes a slag guide plate 101 and a transition plate 102 that are connected to each other, one end of the transition plate 102 is connected to the slag guide plate 101, and the other end is connected to the slag guiding plate 201, wherein the slag guide plate 101 is arranged in the furnace, specifically, the slag guide plate 101 covers the threshold of the furnace, so when slagging, the slag rake will not directly act on the threshold of the furnace, but on the slag guide plate 101, thereby protecting the threshold of the furnace and avoiding damage to the threshold material of the furnace, resulting in a reduction in the life of the furnace and fire.

[0031] In this embodiment, the slag guide plate 101 and the transition plate 102 are both arranged to be inclined toward the furnace. The slag guide plate 101 guides the slag. When the staff removes the slag, the slag removal tool directly acts on the slag guide plate 101, which can prevent the slag removal tool from directly acting on the furnace threshold, causing the furnace threshold material to be damaged, resulting in a decrease in the furnace life and crossfire. The transition plate 102 is used to keep the slag still. When the slag is on the transition plate 102, the residual liquid metal can flow back along the transition plate 102 toward the furnace, thereby achieving the purpose of recycling.

[0032] In particular, if Figure 2 As shown, a plurality of filter holes are provided on the transition plate 102. The liquid metal below the slag will be blocked by the slag and cannot flow back smoothly. Therefore, through the filter holes provided on the transition plate 102, the residual liquid metal can fall on the furnace body of the furnace through the filter holes and flow back into the furnace, so that the slag and the liquid metal can be better separated, so as to better save material energy. Among them, the filter holes are waist holes, which have better permeability for the liquid metal, so as to improve the recycling rate of the liquid metal.

[0033] Baffles 103 are provided on both sides of the transition plate 102. The baffles 103 can limit the slag and liquid metal on the transition plate 102, preventing the liquid metal or slag from falling to the ground from both sides of the transition plate 102, thereby improving the safety of the device. In addition, the baffles 103 can strengthen the transition plate 102, thereby enhancing the bearing capacity of the transition plate 102. In addition, a baffle 103 can also be added in the middle of the transition plate 102 according to actual conditions to play a role of separation and to enhance the strength of the transition plate 102.

[0034] In this embodiment, the slag inlet 201 is arranged on the frame 301, and a slag outlet 202 is arranged at the bottom of the slag inlet 201, and a reactor 401 is arranged below the slag outlet 202. The slag accumulates in the slag inlet 201, and is directly transferred to the reactor 401 below through the slag outlet 202. There is no need to transfer the slag manually, which reduces manpower and can prevent the slag from falling to the ground and burning through the ground during the transfer process, posing a safety hazard.

[0035] In particular, in order to adjust the inclination angle of the transition plate 102 to adapt to the actual requirements of different usage scenarios, a height adjustment mechanism 302 is set at the bottom of the frame 301. The height of the frame 301 can be adjusted by the height adjustment mechanism 302, thereby indirectly adjusting the inclination angle of the transition plate 102. The adjustment is made according to the actual situation, so that the liquid metal refluxes more smoothly and the slag removal operation is more appropriate.

[0036] The height adjustment mechanism 302 can be selected from different types according to actual needs, for example, the height adjustment mechanism 302 is a cushion block, and the cushion block supports the frame 301. The height of the frame 301 can be adjusted by replacing cushion blocks of different heights. Or the height adjustment mechanism 302 is a telescopic leg. The height of the frame 301 can be adjusted by adjusting the length of the telescopic leg. Or the height adjustment mechanism 302 is a plurality of adjustment bolts arranged at the bottom of the frame 301. The height of the frame 301 can be adjusted by adjusting the adjustment bolts.

[0037] The device can be used for slag removal in a liquid aluminum furnace. In the present embodiment, the application in an aluminum furnace is taken as an example for explanation. After the solid material is melted in the aluminum furnace, there is alumina slag that needs to be removed. The slag floats on the surface of the liquid aluminum. When the staff uses the device for slag removal, they use a slag rake to scrape the floating alumina slag in the furnace to the threshold of the furnace. In the slag removal process, the slag rake directly acts on the slag guide plate 101, so as to scrape the solid-liquid mixture along the slag guide plate 101 to the transition plate 102. The slag on the transition plate 102 will carry a certain amount of liquid aluminum. The liquid aluminum has fluidity. Under the action of gravity, part of the liquid aluminum flows back into the furnace, and the other part of the liquid aluminum falls from the filter hole and drips onto the threshold of the aluminum furnace and flows back into the furnace. After completing the solid-liquid separation, the staff scrapes the slag stagnant on the slag guide plate to the slag guide plate 201 for collection, and transfers the accumulated slag from the slag drop port 202 to the reactor 401 below, so as to facilitate post-processing of the slag. This device can effectively separate the liquid metal and slag in the furnace, reduce the residual liquid metal on the slag, and save the loss of raw materials. In addition, by using this device to guide the slag to be scraped out, the furnace threshold can be well protected, and the slag can be prevented from falling to the ground and burning through the ground, so it is safer and more reliable to use.

[0038] Embodiment 2:

[0039] This embodiment discloses a slag removal method, which uses the device in embodiment 1, and the method comprises the following steps:

[0040] S101: scraping the slag in the furnace to the slag guiding mechanism and letting it stay still;

[0041] S102: After the liquid metal contained in the slag flows back into the furnace, the slag on the slag guiding mechanism is scraped into the slag guiding plate 201;

[0042] S103: The accumulated slag in the slag guide tray 201 is transferred to the reaction kettle 401 for post-processing.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A furnace threshold transition device, characterized in that: Installed at the outlet of the furnace, comprising a slag guide plate and a slag guide plate (201), one end of the slag guide plate being a free end, the free end of the slag guide plate extending into the furnace, the other end of the slag guide plate being connected to the slag guide plate (201), and the slag guide plate being inclined in a manner of gradually descending toward the free end; the slag guide plate comprising a slag guide plate (101) and a transition plate (102), the slag guide plate (101) being connected to the transition plate (102), one end of the slag guide plate (101) being a free end, the transition plate (102) being connected to the slag guide plate (201), and the end of the transition plate (102) connected to the slag guide plate (101) being lower than the end of the transition plate (102) connected to the slag guide plate (201).

2. A furnace threshold transition device according to claim 1, characterized in that: The transition plate (102) is provided with a plurality of filter holes.

3. A furnace threshold transition device according to claim 2, characterized in that: Baffles (103) are arranged on both sides of the transition plate (102).

4. A furnace threshold transition device according to claim 1, characterized in that: The slag guiding plate (201) is arranged on the frame (301), a slag dropping opening (202) is arranged on the slag guiding plate (201), and a reaction kettle (401) is arranged below the slag dropping opening (202).

5. A furnace threshold transition device according to claim 4, characterized in that: A height adjustment mechanism (302) is provided at the bottom of the frame (301).

6. A furnace threshold transition device according to claim 5, characterized in that: The height adjustment mechanism (302) is a cushion block, and the cushion block supports the frame (301).

7. A furnace threshold transition device according to claim 5, characterized in that: The height adjustment mechanism (302) is a telescopic leg.

8. A furnace threshold transition device according to claim 6, characterized in that: The height adjustment mechanism (302) is a plurality of adjustment bolts arranged at the bottom of the frame (301).

9. A slag removal method, characterized in that: Using the furnace threshold transition device according to claim 1 comprises the following steps: S101: scraping the slag in the furnace to the slag guiding mechanism and letting it stay still; S102: After the liquid metal contained in the slag flows back into the furnace, the slag on the slag guiding mechanism is scraped into the slag guiding plate (201); S103: The accumulated slag in the slag guide plate (201) is transferred to the reaction kettle (401) for post-processing.

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