Efficient cooling system for aluminum alloy ingot casting machine

Abstract

The utility model discloses an efficient cooling system for an aluminum alloy ingot casting machine, which belongs to the technical field of alloy casting and comprises an aluminum ingot casting machine, the aluminum ingot casting machine comprises a chain belt, a plurality of ingot moulds are uniformly and fixedly mounted on the chain belt, an aluminum liquid distributor is correspondingly arranged at the front end of the aluminum ingot casting machine, and a demoulding mechanism is correspondingly arranged at the rear end of the aluminum ingot casting machine; the water cooling mechanism is arranged between the molten aluminum distributor and the demolding mechanism, and the water cooling mechanism is located at the bottom of an ingot mold installed on an upper-row chain belt of the aluminum ingot casting machine; the air cooling mechanism is arranged between the molten aluminum distributor and the demolding mechanism and located in the middle of the outer side of the water cooling mechanism and the aluminum ingot casting machine. On the basis of soaking type water cooling at the bottom of the ingot mold, the air cooling mechanism is additionally arranged for air cooling, the cooling speed of melt entering the ingot mold is increased, the solidification time is shortened, after melt ingot casting, grain refinement is achieved, the loose area is minimum, the surface quality is smooth and flat, and meanwhile the mechanical strength of an aluminum ingot is improved.

Description

Technical Field

[0001] This utility model belongs to the field of alloy casting technology, and in particular relates to a high-efficiency cooling system for aluminum alloy ingot casting machines. Background Technology

[0002] Aluminum alloy casting is a method of solidifying liquid metal. It involves pouring liquid metal that meets the casting requirements into a mold (crystallizer) of a certain shape through a series of casting tools. Under the action of gravity or external force fields (such as electromagnetic force, centrifugal force, vibration inertial force, pressure, etc.), the liquid metal fills the mold cavity, cools and solidifies into an ingot or casting with the shape of the mold cavity.

[0003] There are many methods for casting aluminum alloy ingots. Based on the position and movement characteristics of the ingot relative to the mold (crystallizer), they are divided into continuous casting and discontinuous casting. When producing aluminum alloy ingots using continuous casting (also known as chain-driven continuous casting), the crystallization process gradually expands from the surface of the casting towards the center and from the bottom to the top. The metal only has the motive force to crystallize when its temperature drops below its melting point (i.e., in a supercooled state). Therefore, cooling is essential during casting.

[0004] However, the cooling intensity during the aluminum ingot casting process is crucial for the cooling water temperature. Typically, the cooling water temperature is set at 20℃. However, due to differences in regional climate conditions, water supply facilities, and factory temperatures, there are significant variations, resulting in regional or seasonal casting quality defects.

[0005] Therefore, a high-efficiency cooling system for aluminum alloy ingot casting machines is proposed. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model proposes a high-efficiency cooling system for aluminum alloy ingot casting machines.

[0007] To achieve the above objectives, this utility model provides a high-efficiency cooling system for an aluminum alloy ingot casting machine, comprising:

[0008] An aluminum ingot casting machine includes a chain belt on which several ingot molds are uniformly fixed. An aluminum liquid distributor is provided at the front end of the aluminum ingot casting machine, and a demolding mechanism is provided at the rear end of the aluminum ingot casting machine.

[0009] A water-cooling mechanism is disposed between the aluminum liquid distributor and the demolding mechanism, and the water-cooling mechanism is located at the bottom of the ingot mold mounted on the upper chain belt of the aluminum ingot casting machine;

[0010] The air-cooling mechanism is located between the aluminum liquid distributor and the demolding mechanism, at the middle of the outer side of the water-cooling mechanism and the aluminum ingot casting machine.

[0011] According to the present application, a high-efficiency cooling system for an aluminum alloy ingot casting machine is provided. The water cooling mechanism includes a water cooling box, which is filled with cooling water. The water cooling box is fixed to the frame on both sides of the aluminum ingot casting machine. The bottom of the ingot mold installed on the upper chain of the aluminum ingot casting machine is immersed in the cooling water in the water cooling box.

[0012] According to the present application, an efficient cooling system for an aluminum alloy ingot casting machine is provided. The air-cooling mechanism includes an air-cooling shroud, which is disposed on the outer side of the middle part of the water-cooling box and the aluminum ingot casting machine. Several axial flow fans are fixedly connected to the top of the air-cooling shroud.

[0013] According to the high-efficiency cooling system for an aluminum alloy ingot casting machine provided in this application, exhaust pipes are fixedly connected to one side of the axial flow fan on the top of the air-cooled cover.

[0014] According to the present application, a high-efficiency cooling system for an aluminum alloy ingot casting machine is provided, wherein the air-cooled cover has a plurality of heat dissipation holes at the position corresponding to the lower chain belt of the aluminum ingot casting machine.

[0015] According to the present application, an efficient cooling system for an aluminum alloy ingot casting machine is provided, wherein the aluminum liquid distributor is connected to the aluminum ingot casting machine via a transmission.

[0016] According to the present application, a high-efficiency cooling system for an aluminum alloy ingot casting machine is provided, wherein the aluminum liquid distributor is separated from the water cooling mechanism by a distance of ten ingot molds.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] The aluminum liquid distributor sequentially and evenly pours molten aluminum into ingot molds on a chain conveyor. The aluminum ingot casting machine drives the chain conveyor to rotate, which in turn moves the ingot molds along with the chain conveyor. After the molten aluminum is poured into the molds by the aluminum liquid distributor, the molds enter a water-cooling mechanism. The water-cooling mechanism cools the outer surface of the ingot molds, thereby promoting the solidification of the molten aluminum. Simultaneously, an air-cooling mechanism is activated. This air-cooling mechanism is located on the outer side of the middle of the water-cooling mechanism and the aluminum ingot casting machine. On top of the water cooling, this part of the ingot is air-cooled. Through direct contact between the cold air and the aluminum ingot and accelerated gas replacement, the molten aluminum is rapidly cooled and solidified, improving the mechanical properties of the aluminum ingot itself. This invention adds an air-cooling mechanism to the bottom immersion water cooling of the ingot mold, increasing the cooling rate of the melt after entering the ingot mold, shortening the solidification time, and resulting in finer grains, minimal loose areas, a smooth and flat surface after casting, while also improving the mechanical strength of the aluminum ingot itself. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the high-efficiency cooling system for aluminum alloy ingot casting machine according to this utility model.

[0021] In the diagram: 1. Aluminum ingot casting machine; 2. Aluminum liquid distributor; 3. Water cooling mechanism; 4. Air cooling cover; 5. Axial flow fan; 6. Exhaust pipe; 7. Demolding mechanism; 8. Ingot mold; 9. Chain belt; 10. Heat dissipation holes. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the prior art, when producing ingots using the continuous casting method (chain-type moving mold continuous casting method), the casting equipment and methods are as follows. Taking the linear continuous casting equipment and its usage method disclosed in CN114378266A as an example: The continuous casting equipment for crude copper includes a steel shell for an intermediate ladle, a steel shell for a chute, a liquid copper hopper, a mold, a chain belt, a copper leakage collection baffle, a spray cooling pipe, a front-end rapping device, a copper blocking device, a copper ingot chute, a copper prying device, a copper prying chute, a spraying device, a slurry blowing device, a drive sprocket device, and a driven sprocket device.

[0024] The chain belt is set in a closed loop and supported by roller bases installed on the platform foundation. Both ends are driven by a drive sprocket device and a driven sprocket device. The chain belt at one end of the drive sprocket device is set horizontally, and the chain belt at one end of the driven sprocket device is inclined at 6° to 10° with the horizontal plane. The driven sprocket device is installed below the crude copper chute of the blowing furnace.

[0025] The mold is installed on the chain belt, with the side walls tilted outward at 30° to 45° and the bottom rounded.

[0026] The molds are cast into copper blocks of a certain weight and shape. The molds have a special overlapping design, so that when one mold is full, the next mold can be filled. The molds adopt a "large arc equal wall thickness" design, with increased side wall inclination angle for easy demolding. The bottom has an overall transition arc for easy demolding, and there are no partition ribs.

[0027] The tundish steel shell is installed above the chain belt on one side of the driven sprocket device and below the crude copper chute of the blowing furnace; the chute steel shell is connected between the tundish steel shell and the liquid copper hopper; the liquid copper hopper is installed above the mold.

[0028] Copper leakage collection baffles are set on both sides of the mold, and copper leakage collection hoppers are connected to the bottom.

[0029] The spray cooling pipe is located above the horizontal section of the chain belt and is connected to the spray device. The spray device includes an electric spray water valve, a manual spray water valve, and a water distributor. The spray cooling pipe is connected to the outlet port of the water distributor through the manual spray water valve, and the electric spray water valve is located at the inlet port of the water distributor.

[0030] The front rapping device is located above the chain at one end of the drive sprocket device.

[0031] The copper blocking device is located at the discharge end of the chain belt, flush with the drive sprocket device.

[0032] A copper ingot chute is located at the bottom of the copper blocking device to receive the copper ingots that fall off.

[0033] The copper prying device is located at the lower part of the discharge end of the chain belt, and a copper prying chute is inclinedly provided at the lower part of the copper prying device.

[0034] The mortar spraying device is located on the horizontal section of the chain belt and at the lower end of the spray cooling pipe. The mortar spraying device includes a mortar collection tank, a spraying funnel, a mortar mixer, a spraying pump, a mortar tank, and mortar nozzles. The mortar collection tank is located below the spray cooling pipe, with its bottom connected to the mortar tank and equipped with a spraying funnel. The mortar tank contains a mortar mixer and a spraying pump, which is connected to the mortar nozzles via pipes. The mortar nozzles face the mold at the lower end of the chain belt and are located within the mortar collection tank.

[0035] During casting, the mortar mixer is turned on. When the mold after demolding is positioned directly above the mortar nozzle, the spray pump is activated to mix a uniform and usable mortar, which is then sprayed through the mortar nozzle into the emptied mold cavity. The isolation layer formed in the mold cavity meets the demolding requirements. Mortar that is not fully adhered is collected in the mortar collection tank and reused. A spray funnel is installed between the mortar collection tank and the mortar tank. The spray funnel serves to recover the mortar and separate the copper block from the mortar. It adopts a grate design to prevent the copper block from falling back into the mortar return pool, causing the mortar to mix with the copper block and resulting in blockage, which would make spraying, mortar return, and cleaning of the copper block inconvenient.

[0036] The method of using the above-mentioned linear continuous casting apparatus for crude copper includes the following steps:

[0037] S1: Complete equipment installation. When the anode furnace is under long-term maintenance or single-furnace operation is not timely due to faults or other reasons, or when the furnace is pressed for a long time due to untimely output, perform chute maintenance and baking work.

[0038] S2: Adjust the frequency of the chain belt according to the discharge flow rate of liquid copper, and discharge through the copper outlet. Liquid copper flows through the steel shell of the tundish and the steel shell of the chute into the liquid copper hopper, and then flows into the mold at the top of the running chain belt. Then the chain belt drives the tar liquid copper ingot mold to move forward.

[0039] S3: When the mold runs to about 10m and reaches the horizontal section of the chain, the spray device is turned on, and the copper block with a shell inside the mold is cooled through the spray cooling pipe, so that the temperature of the copper block drops to between 200 and 400℃.

[0040] S4: When the cooled copper block runs to the end of the chain at the drive sprocket device, the machine front vibration device is used to make elastic impact to separate the copper block from the mold until it loosens and falls off. The falling copper block is guided by the copper blocking device and falls into the copper ingot chute set in front of the machine.

[0041] S5: A small number of copper blocks that have not fallen off follow the chain to the copper prying device. After the copper prying device lifts the mold upward, it allows the mold to fall freely, thereby removing the copper blocks. The removed copper blocks fall into the copper prying chute.

[0042] S6: The empty chain conveyor after the copper block is removed runs to the slurry spraying device. The slurry spraying device sprays slurry into the mold cavity, which is still hot. After the slurry is applied, the mold runs to the bottom of the liquid copper hopper to continue the next casting.

[0043] The aforementioned apparatus and method employ the continuous casting method for casting crude copper.

[0044] In aluminum alloy ingot casting, cooling is a crucial temperature reduction measure. Due to cost and cooling effectiveness considerations, water is the commonly used cooling medium in existing technologies. Excess heat in the aluminum ingot is dissipated through heat conduction via direct spray cooling and forced direct water bath cooling. The casting speed, casting temperature, and cooling intensity are fundamental technical parameters in aluminum ingot production, directly affecting the yield rate of the cast ingots. However, the water cooling process in existing technologies suffers from unpredictable factors such as water temperature and climate, making the cooling intensity uncontrollable. This, in turn, affects subsequent processing steps and the final product quality.

[0045] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Reference Figure 1 As shown, this embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine, comprising:

[0047] Aluminum ingot casting machine 1 includes a chain belt 9, on which several ingot molds 8 are evenly fixed. A liquid aluminum distributor 2 is provided at the front end of aluminum ingot casting machine 1, and a demolding mechanism 7 is provided at the rear end of aluminum ingot casting machine 1.

[0048] The water cooling mechanism 3 is located between the aluminum liquid distributor 2 and the demolding mechanism 7. The water cooling mechanism 3 is located at the bottom of the ingot mold 8 installed on the upper chain belt 9 of the aluminum ingot casting machine 1.

[0049] The air-cooling mechanism is located between the aluminum liquid distributor 2 and the demolding mechanism 7, in the middle of the outer side of the water-cooling mechanism 3 and the aluminum ingot casting machine 1.

[0050] The aluminum liquid distributor 2 sequentially and evenly pours molten aluminum into the ingot mold 8 on the chain belt 9. The aluminum ingot casting machine 1 drives the chain belt 9 to rotate, thereby moving the ingot mold 8 along with the chain belt 9. After the aluminum liquid is poured into the ingot mold 8 by the aluminum liquid distributor 2, it enters the water cooling mechanism 3. The water cooling mechanism 3 cools the outer surface of the ingot mold 8, thereby promoting the solidification of the molten aluminum. At the same time, the air cooling mechanism is activated. The air cooling mechanism is located on the outer side of the middle of the water cooling mechanism 3 and the aluminum ingot casting machine 1. On the basis of water cooling, this part of the ingot is air cooled. Through the direct contact between the cold air and the aluminum ingot and the accelerated gas replacement, the molten aluminum is rapidly cooled and solidified, thereby improving the mechanical properties of the aluminum ingot itself. This utility model adds an air cooling mechanism to the bottom immersion water cooling of the ingot mold 8, which increases the cooling rate of the melt after entering the ingot mold 8, shortens the solidification time, and makes the melt ingot achieve fine grains, minimize the loose area, and have a smooth and flat surface quality, while improving the mechanical strength of the aluminum ingot itself.

[0051] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine. The water cooling mechanism 3 includes a water cooling box, which is filled with cooling water. The water cooling box is fixed to the frame on both sides of the aluminum ingot casting machine 1. The bottom of the ingot mold 8 installed on the upper chain belt 9 of the aluminum ingot casting machine 1 is immersed in the cooling water in the water cooling box.

[0052] The cooling water in the water-cooling box cools the outer surface of the ingot mold 8 by direct contact, thereby promoting the solidification of the aluminum liquid.

[0053] Furthermore, the water in the water-cooled tank needs to be replaced or circulated periodically to ensure that the cooling water temperature is within a suitable range.

[0054] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine. The air-cooling mechanism includes an air-cooling shroud 4, which is installed on the outer side of the middle part of the water-cooling box and the aluminum ingot casting machine 1. Several axial flow fans 5 are fixedly connected to the top of the air-cooling shroud 4.

[0055] After the first cast ingot mold 8 enters the water cooling box, the axial flow fan 5 is started. The air blower 5 accelerates the circulation of hot air inside the air cooling shroud 4, and the cold air directly contacts the surface of the aluminum ingot, thus accelerating the solidification of the aluminum liquid.

[0056] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine, wherein an exhaust pipe 6 is fixedly connected to one side of the axial flow fan 5 on the top of the air-cooled cover 4.

[0057] An exhaust pipe 6 is installed next to each axial flow fan 5 so that the heated air can be quickly discharged through the nearest exhaust pipe 6, thereby ensuring the ventilation rate of cold air, accelerating gas replacement, and promoting the rapid cooling and solidification of aluminum liquid.

[0058] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine. Several heat dissipation holes 10 are provided on the air-cooled cover 4 at the position corresponding to the lower chain belt 9 of the aluminum ingot casting machine 1.

[0059] The air-cooled cover 4 has evenly spaced heat dissipation holes 10 at its lower part, which allow the demolded ingot mold 8 to dissipate heat evenly, ensuring its use in the next casting cycle.

[0060] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine, wherein the aluminum liquid distributor 2 is connected to the aluminum ingot casting machine 1 via a transmission.

[0061] The aluminum liquid distributor 2 is driven by the aluminum ingot casting machine 1, which can match the speed at which the aluminum liquid distributor 2 distributes aluminum liquid with the speed at which the chain belt 9 of the aluminum ingot casting machine 1 conveys the ingot mold 8, making it easy to adjust.

[0062] This embodiment provides a high-efficiency cooling system for an aluminum alloy ingot casting machine, wherein the aluminum liquid distributor 2 and the water cooling mechanism 3 are separated by a distance of ten ingot molds 8.

[0063] When molten aluminum flows out of the molten aluminum distributor 2, its temperature is very high. If it is too close to the cooling mechanism, the molten aluminum will begin to cool rapidly before it has fully spread and partially solidified in the ingot mold 8, resulting in an excessive temperature gradient between the surface and interior of the aluminum ingot. This may cause significant thermal stress in the aluminum ingot, leading to defects such as cracks. Maintaining a certain distance allows the molten aluminum to undergo a natural cooling process before entering the effective cooling range of the cooling mechanism, enabling it to partially solidify and take shape within the ingot mold 8, thus reducing the adverse effects of rapid cooling.

[0064] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0065] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0066] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A high-efficiency cooling system for an aluminum alloy ingot casting machine, characterized in that, include: An aluminum ingot casting machine (1) includes a chain belt (9), on which several ingot molds (8) are uniformly fixed. An aluminum liquid distributor (2) is provided at the front end of the aluminum ingot casting machine (1), and a demolding mechanism (7) is provided at the rear end of the aluminum ingot casting machine (1). A water cooling mechanism (3) is provided between the aluminum liquid distributor (2) and the demolding mechanism (7). The water cooling mechanism (3) is located at the bottom of the ingot mold (8) on the upper row of the chain belt (9) of the aluminum ingot casting machine (1). The air-cooling mechanism is located between the aluminum liquid distributor (2) and the demolding mechanism (7), and is situated in the middle of the outer side of the water-cooling mechanism (3) and the aluminum ingot casting machine (1).

2. The high-efficiency cooling system for aluminum alloy ingot casting machines according to claim 1, characterized in that: The water cooling mechanism (3) includes a water cooling box, which is filled with cooling water. The water cooling box is fixed to the frame on both sides of the aluminum ingot casting machine (1). The bottom of the ingot mold (8) installed on the chain belt (9) on the upper row of the aluminum ingot casting machine (1) is immersed in the cooling water in the water cooling box.

3. The high-efficiency cooling system for aluminum alloy ingot casting machines according to claim 2, characterized in that: The air-cooling mechanism includes an air-cooling shroud (4), which is located on the outer side of the middle part of the water-cooled box and the aluminum ingot casting machine (1). Several axial flow fans (5) are fixedly connected to the top of the air-cooling shroud (4).

4. The high-efficiency cooling system for aluminum alloy ingot casting machine according to claim 3, characterized in that: Exhaust pipes (6) are fixedly connected to one side of the axial flow fan (5) at the top of the air-cooled cover (4).

5. The high-efficiency cooling system for aluminum alloy ingot casting machines according to claim 3, characterized in that: The air-cooled cover (4) is provided with several heat dissipation holes (10) at the position of the lower chain belt (9) of the aluminum ingot casting machine (1).

6. The high-efficiency cooling system for aluminum alloy ingot casting machines according to claim 1, characterized in that: The aluminum liquid distributor (2) is connected to the aluminum ingot casting machine (1) via a transmission.

7. The high-efficiency cooling system for aluminum alloy ingot casting machine according to claim 1, characterized in that: The aluminum liquid distributor (2) is separated from the water cooling mechanism (3) by a distance equal to ten ingot molds (8).

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