A device and method for controlling the liquid level in a zinc-aluminum ingot premelting pot

Abstract

This invention relates to the field of smelting technology, specifically a zinc-aluminum ingot pre-melting pot liquid level control device and method. The device includes a pre-melting pot, a cantilever assembly, and a liquid level control ingot. The top of the pre-melting pot is provided with a liquid level control port. The cantilever assembly includes a suspension section located above the liquid level control port. The suspension section includes a translation mechanism, a lifting mechanism, and a clamping mechanism. The translation mechanism includes a track and a translation trolley. The track is horizontally positioned, and the translation trolley is slidably mounted on the track. The fixed end of the lifting mechanism is fixedly connected to the translation trolley, and the lifting end of the lifting mechanism is fixedly connected to the clamping mechanism. The clamping mechanism is used to clamp the liquid level control ingot. This invention addresses the problem in the prior art where heating the solidified metal in the sluice with a burner leads to metal oxide impurities affecting product quality.

Description

Technical Field

[0001] This invention relates to the field of smelting technology, specifically to a device and method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot. Background Technology

[0002] In the hot-dip galvanized aluminum production process, the zinc and aluminum molten metal in the main pot is plated onto the strip steel. A pre-melting pot is used to heat and melt solid zinc and aluminum alloy ingots to replenish the main pot with the continuously consumed zinc and aluminum molten metal. After the zinc and aluminum ingots are melted in the pre-melting pot, the zinc and aluminum molten metal overflows from the outlet of the pre-melting pot and flows into the main pot through a chute.

[0003] When zinc-aluminum alloy ingots are placed in the pre-melting pot, the liquid level in the pre-melting pot will rise rapidly, and a large amount of molten metal solution will flow from the outlet into the chute. However, as the liquid level in the pre-melting pot gradually drops to the same height as the bottom of the outlet, the flow rate of the solution in the chute will gradually decrease. When the flow rate is very low, the metal solution in the chute will cool down and solidify faster. As the solidified metal adhering to the inner wall of the chute accumulates, the chute will become blocked.

[0004] Existing technology uses multiple sets of burners on the sluice to heat the sluice during the flow of molten metal, preventing solidification. However, using burners for heating consumes a large amount of fuel gas, and the combustion gases react with the molten metal to form oxidation, resulting in a significant amount of metal oxides. These oxides flow into the main pot with the molten metal, becoming impurities and severely impacting product quality. Summary of the Invention

[0005] The present invention aims to provide a device and method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot, so as to solve the problem in the prior art that the use of burners to heat the solidified metal in the chute leads to metal oxide impurities affecting product quality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a zinc-aluminum ingot pre-melting pot liquid level control device, comprising a pre-melting pot, a cantilever device and a liquid level control ingot, wherein the top of the pre-melting pot is provided with a liquid level control port, the cantilever device includes a suspension section, the suspension section is located above the liquid level control port, and the suspension section includes a translation mechanism, a lifting mechanism and a clamping mechanism.

[0007] The translation mechanism includes a track and a translation trolley. The track is horizontally arranged, and the translation trolley is slidably installed on the track. The fixed end of the lifting mechanism is fixedly connected to the translation trolley, and the lifting end of the lifting mechanism is fixedly connected to the clamping mechanism. The clamping mechanism is used to clamp the liquid level control ingot.

[0008] The principle and advantages of this solution are as follows: the clamping mechanism can be composed of at least two grippers, which are used to clamp and release the liquid level control ingot by closing and opening. The translation mechanism, lifting mechanism and clamping mechanism are all driven by independent drive devices. The lifting end of the lifting mechanism can satisfy the movement of the clamping mechanism in the vertical plane, and the sliding of the translation trolley of the translation mechanism along the track can satisfy the movement of the clamping mechanism along the track direction. The coordinated operation of the lifting mechanism and the translation mechanism allows the clamping mechanism to grab the liquid level control ingot from the ground and suspend the liquid level control ingot above the liquid level control port.

[0009] The lifting mechanism then extends the liquid level control ingot into the pre-melting pot through the liquid level control port and immerses it in the molten metal. The liquid level control ingot controls the liquid level of the molten metal in the pre-melting pot by moving it down to immerse it and moving it up to remove it. This ensures that the liquid level in the pre-melting pot is far away from the lower end of the liquid outlet. The solution in the chute only has two states: high flow rate and no flow rate. This avoids the situation where the molten metal solidifies in the chute due to low flow rate. There is no need to heat the chute, which saves production costs and prevents the formation of metal oxides, thus ensuring product quality.

[0010] Preferably, as an improvement, the cantilever device further includes a support section for supporting the suspension section. The top end of the support section is fixedly connected to the suspension section, and the bottom end of the support section is provided with a base. The base includes a chassis, a turntable, and a rotating shaft. The chassis is placed on the ground, and the turntable is rotatably connected above the chassis via the rotating shaft. The bottom end of the support section is fixedly mounted on the turntable.

[0011] The beneficial effects of this improvement are: equipping the rotating shaft with an independent drive mechanism controls the rotation of the rotating shaft, causing the suspension section to rotate around the axis of the support section. With the cooperation of the base and the translation mechanism, the translation trolley can move within the plane of the track radius, increasing the movement range of the clamping mechanism and making the use of the liquid level control device more flexible and adaptable to various production environments.

[0012] Preferably, as an improvement, the level control ingot is a long strip of zinc-aluminum alloy, and the metal content ratio of the zinc-aluminum alloy is the same as the zinc-aluminum raw material ratio in the pre-melting pot. The level control ingot can enter the pre-melting pot through the level control port.

[0013] The beneficial effects of this improvement are: the liquid level control ingot has the same composition as the raw material added to the pre-melting pot, and the molten liquid level control ingot can be used as part of the production raw material without affecting the metal composition in the pre-melting pot. At the same time, even if the part of the suspended liquid level control ingot immersed in the solution is completely melted, a new liquid level control ingot can be replaced by the clamping mechanism, resulting in low liquid level control costs. Furthermore, since the liquid level control ingot is long and narrow, the clamping mechanism can clamp only the upper part of the liquid level control ingot, allowing the lower part of the liquid level control ingot to be immersed in the solution, thus avoiding the clamping mechanism being immersed in the solution and affecting the quality of the metal solution.

[0014] Preferably, as an improvement, the zinc-aluminum ingot pre-melting pot liquid level control device further includes a main pot and a chute;

[0015] The chute is inclined from high to low. The higher end of the chute is connected to the liquid outlet of the pre-melting pot, and the lower end of the chute is connected to the liquid inlet of the main pot. The liquid outlet is lower than the liquid level control port. The top of the pre-melting pot is provided with a packing port for replenishing solid raw materials.

[0016] The beneficial effects of this improvement are: the inclined setting of the chute can speed up the flow of the molten metal through the chute and shorten the residence time of the solution in the chute; the outlet of the pre-melting pot is lower than the liquid level control port to prevent the molten metal from overflowing from the liquid level control port; and the independent setting of the filling port and the liquid level control port allows the filling and the addition of liquid level control ingots to be carried out simultaneously, improving the flexibility of use.

[0017] To better utilize the zinc-aluminum ingot premelting pot liquid level control device, this invention provides a zinc-aluminum ingot premelting pot liquid level control method, comprising the following steps:

[0018] S1. Control the clamping mechanism to clamp the liquid level control ingot, and raise the liquid level control ingot to a high position by the lifting mechanism;

[0019] S2. The translation trolley and the base drive the lifting mechanism to move horizontally, so that the liquid level control ingot is located directly above the liquid level control port;

[0020] S3. When solid raw materials are added to the filling port of the premelting pot, the lifting mechanism is controlled to move down quickly, and the liquid level control ingot is inserted from the liquid level control port to below the liquid surface of the premelting pot, further raising the liquid level height inside the premelting pot.

[0021] S4. When the liquid level in the pre-melting pot drops to a preset height, the lifting mechanism is controlled to move upward quickly, and the liquid level control ingot is pulled away from the liquid level control port of the pre-melting pot, so that the liquid level in the pre-melting pot drops rapidly below the lower end of the liquid outlet of the pre-melting pot, thereby cutting off the flow of solution in the chute.

[0022] The beneficial effects of this improvement are: before adding solid raw materials, the liquid level control ingot is prepared in advance, so that the liquid level control ingot can be immersed in the pre-melting pot in time; the solid raw materials and liquid level control ingot are added at the same time, so that the liquid level in the pre-melting pot rises rapidly, increases the liquid pressure at the outlet, and further increases the flow rate of the metal solution in the chute.

[0023] As the solution overflows from the pre-melting pot, the flow rate of the solution in the chute gradually decreases. Just before the liquid in the chute is reduced to a flow rate that is easy to solidify, i.e., the liquid level drops below the preset height, the liquid level control ingot is pulled out in advance, so that the liquid level drops rapidly below the outlet and the liquid no longer overflows from the outlet, stopping the supply of material to the main pot.

[0024] Preferably, as an improvement, the preset height is located above the lower end of the liquid outlet of the pre-melting pot.

[0025] The beneficial effect of this improvement is that it makes it easier to extract the liquid level control bar in advance.

[0026] Preferably, as an improvement, a storage space is provided next to the cantilever device for stacking liquid level control ingots;

[0027] When the weight of the liquid level control ingot held by the clamping mechanism is less than the preset weight, the translation mechanism, lifting mechanism and base are controlled to move the clamping mechanism to the storage position, and the clamping mechanism is controlled to replace the liquid level control ingot being held. The weight of the replaced liquid level control ingot is greater than the preset weight, and the unloaded liquid level control ingot is used as solid raw material to be added to the filler port.

[0028] Preferably, as an improvement, the volume of the liquid level control ingot with a weight equal to the preset weight is greater than the volume between the lower end of the liquid outlet in the pre-melting pot and the preset height.

[0029] The beneficial effects of this improvement are: ensuring that the addition or removal of the liquid level control ingot can effectively increase or decrease the liquid level in the solution, preventing the liquid level from remaining near the lower end of the outlet, increasing the distance between the liquid level and the lower end of the outlet, and avoiding the overflow of a small amount of solution due to the mechanical vibration of the pre-melting pot. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the zinc-aluminum ingot pre-melting pot liquid level control equipment.

[0031] Figure 2 This is a flowchart of a method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The reference numerals in the accompanying drawings include: cantilever device 1, pre-melting pot 2, chute 3, main pot 4, liquid level control port 5, filling port 6, track 7, translation trolley 8, lifting mechanism 9, clamping mechanism 10, chassis 11, turntable 12, rotating shaft 13, and liquid level control ingot 14.

[0034] Example 1

[0035] The basics are as follows: Figure 1 As shown, a zinc-aluminum ingot pre-melting pot liquid level control device includes a cantilever device 1, a pre-melting pot 2, a chute 3, a main pot 4, and a liquid level control ingot 14. The cantilever device 1 is located adjacent to the pre-melting pot 2. The chute 3 is inclined from high to low. The higher end of the chute 3 is connected to the liquid outlet of the pre-melting pot 2, and the lower end of the chute 3 is connected to the liquid inlet of the main pot 4. The metal solution in the pre-melting pot 2 overflows from the liquid outlet, flows through the higher end of the chute 3 to the lower end of the chute 3, and finally flows into the main pot 4 to provide hot-dip galvanizing raw materials for the main pot 4.

[0036] The top of the pre-melting pot 2 is provided with a liquid level control port 5 and a filler port 6 for replenishing solid raw materials. The liquid outlet of the pre-melting pot 2 is lower than the liquid level control port 5. The cantilever device includes a suspension section and a support section. The suspension section is set horizontally and the support section is set vertically. The top of the support section is fixedly welded to one end of the suspension section, so that the entire cantilever device is inverted "L" shape.

[0037] The suspension section includes a translation mechanism, a lifting mechanism 9, and a clamping mechanism 10. The translation mechanism includes a track and a translation trolley 8. The track 7 is horizontally set, and the translation trolley 8 is slidably installed on the track 7. The fixed end of the lifting mechanism 9 is fixedly connected to the translation trolley 8, and the lifting end of the lifting mechanism 9 is fixedly connected to the clamping mechanism 10. The clamping mechanism 10 is used to clamp the liquid level control ingot.

[0038] The bottom end of the support section is provided with a base, which includes a chassis 11, a turntable 12 and a rotating shaft 13. The chassis 11 is fixed to the ground by bolts. The chassis 11 and the rotating shaft 13 are rotatably connected by bearings. The rotating shaft 13 is fixedly connected to the turntable 12. The bottom end of the support section is fixedly installed on the turntable 12 by bolts. The rotating shaft 13 is electrically connected to a rotating shaft drive device to automatically provide power to the rotating shaft.

[0039] The translation mechanism, lifting mechanism 9, and clamping mechanism 10 have various structures. In this example, the track 1 is bolted to the top of the suspension section and overlaps with the suspension section. There are two channels in the track 1. The upper part of the translation trolley 8 is provided with four rollers. The four rollers are arranged symmetrically in pairs and are respectively embedded in the two channels of the track 1. Each roller is provided with a roller support frame. The translation trolley 8 is bolted to the roller support frame and is located below the suspension section. The rollers are clamped in the channels of the track 1, so that the translation trolley 8 surrounds the suspension section. A roller drive device is provided for the rollers to provide power for the movement of the translation trolley 8 along the track 1.

[0040] The lifting mechanism 9 can be an electric hoist, telescopic rod, lifting cylinder, or other device. In this embodiment, the lifting mechanism is a telescopic rod. The main body of the telescopic rod, i.e., the fixed end of the telescopic rod, is bolted to the bottom end of the translation trolley 8. The telescopic rod is electrically connected to the telescopic drive device, which provides the power for the extension and retraction of the telescopic rod's telescopic end.

[0041] The clamping mechanism 10 can be a hook, a gripper, or other structure. In this embodiment, the clamping device 10 is a robotic gripping mechanism. The clamping mechanism includes a left gripper, a right gripper, and a gripper seat. The gripper seat is fixedly connected to the telescopic end of the telescopic rod by bolts. The left and right grippers are rotatably connected to the gripper seat by pins. The upper ends of the left and right grippers are rotatably connected to the fixed end and the telescopic end of the hydraulic cylinder, respectively. The extension and retraction of the piston rod of the hydraulic cylinder realizes the movement of the lower ends of the left and right grippers closer and further away, so as to clamp and release the liquid level control bar.

[0042] The liquid level control port 5 of the pre-melting pot 2 is located within the movable range of the clamping mechanism 10. The liquid level control ingot 14 is a strip-shaped zinc-aluminum alloy. The metal content ratio of the zinc-aluminum alloy is the same as that of the zinc-aluminum raw materials in the pre-melting pot 2. The cross-sectional size of the liquid level control ingot 14 is smaller than that of the liquid level control port 5, so that the liquid level control ingot 14 can enter the pre-melting pot 2 through the liquid level control port 5.

[0043] This paper also provides a method for controlling the liquid level in a zinc-aluminum ingot premelting pot using a zinc-aluminum ingot premelting pot liquid level control device, as shown in the attached figure. Figure 2 As shown, it includes the following steps:

[0044] S1. Control the clamping mechanism to clamp the liquid level control ingot, and raise the liquid level control ingot to a high position by the lifting mechanism;

[0045] S2. The translation trolley and the base drive the lifting mechanism to move horizontally, so that the liquid level control ingot is located directly above the liquid level control port;

[0046] S3. When solid raw materials are added to the filling port of the premelting pot, the lifting mechanism is controlled to move down quickly, and the liquid level control ingot is inserted from the liquid level control port to below the liquid surface of the premelting pot, further raising the liquid level height inside the premelting pot.

[0047] S4. When the liquid level in the pre-melting pot drops to a preset height, the lifting mechanism is controlled to move upward quickly, and the liquid level control ingot is pulled away from the liquid level control port of the pre-melting pot, so that the liquid level in the pre-melting pot drops rapidly below the lower end of the liquid outlet of the pre-melting pot, thereby cutting off the flow of solution in the chute.

[0048] The liquid level control ingot is partially immersed in the molten metal in the pre-melting pot by the clamping mechanism, which avoids contamination of the molten metal by the clamping mechanism material itself and extends the service life of the clamping mechanism.

[0049] The speed at which the liquid level control ingot moves upward from the liquid surface and downward into the liquid surface can be set according to the specific size of the liquid level control ingot. However, this speed must ensure that the movement of the liquid level control ingot does not cause a small flow of solution to overflow. Therefore, it is necessary to shorten the displacement time of the liquid level control ingot as much as possible so that the liquid level control ingot moves quickly, such as a moving speed of 2m / s.

[0050] A storage space is provided next to the cantilever device for storing liquid level control ingots.

[0051] When the weight of the liquid level control ingot held by the clamping mechanism is less than the preset weight, the translation mechanism, lifting mechanism and base are controlled to move the clamping mechanism to the storage position, and the clamping mechanism is controlled to replace the liquid level control ingot being held. The weight of the replaced liquid level control ingot is greater than the preset weight, and the unloaded liquid level control ingot is used as solid raw material to be added to the filler port.

[0052] The preset height and preset weight can be set according to the size of the pre-melting pot. The preset height is located above the lower end of the liquid outlet of the pre-melting pot, and the volume of the liquid level control ingot with a weight equal to the preset weight is greater than the volume between the lower end of the liquid outlet and the preset height in the pre-melting pot.

[0053] Example 2

[0054] The difference from Example 1 is that a weight sensor is provided between the translation trolley and the roller support frame to weigh and detect the overall weight of the translation trolley, lifting mechanism, clamping mechanism and liquid level control ingot. The melting amount of the liquid level control ingot is calculated from the weight difference, and it is determined whether a new liquid level control ingot needs to be replaced.

[0055] An ultrasonic level sensor is installed above the filling port of the pre-melting pot. Ultrasonic waves are emitted into the pre-melting pot, and the reflected ultrasonic waves are used to calculate the current liquid level in the pre-melting pot to determine whether the liquid level control ingot needs to be extracted. This method allows the sensor to avoid contact with the metal solution and has high accuracy and reliability.

[0056] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot, used to control a zinc-aluminum ingot pre-melting pot liquid level control device; the device includes a pre-melting pot, a cantilever device, and a liquid level control ingot; the top of the pre-melting pot is provided with a liquid level control port; the cantilever device includes a suspension section located above the liquid level control port; the suspension section includes a translation mechanism, a lifting mechanism, and a clamping mechanism; the translation mechanism includes a track and a translation trolley; the track is horizontally arranged; the translation trolley is slidably mounted on the track; the fixed end of the lifting mechanism is fixedly connected to the translation trolley; the lifting end of the lifting mechanism is fixedly connected to the clamping mechanism; the clamping mechanism is used to clamp the liquid level control ingot; Its features are, The method includes the following steps: S1. Control the clamping mechanism to clamp the liquid level control ingot, and raise the liquid level control ingot to a high position by the lifting mechanism; S2. The translation trolley and the base drive the lifting mechanism to move horizontally, so that the liquid level control ingot is directly above the liquid level control port; S3. When solid raw materials are added to the filling port of the premelting pot, the lifting mechanism is controlled to move down quickly, and the liquid level control ingot is inserted from the liquid level control port to below the liquid surface of the premelting pot, further raising the liquid level height inside the premelting pot. S4. When the liquid level in the pre-melting pot drops to the preset height, the lifting mechanism is controlled to move upward quickly, and the liquid level control ingot is pulled away from the liquid level control port of the pre-melting pot, so that the liquid level in the pre-melting pot drops rapidly below the lower end of the liquid outlet of the pre-melting pot, thereby cutting off the solution flow in the chute. A zinc-aluminum ingot pre-melting pot liquid level control device also includes a main pot and a chute; The chute is inclined from high to low. The higher end of the chute is connected to the liquid outlet of the pre-melting pot, and the lower end of the chute is connected to the liquid inlet of the main pot. The liquid outlet is lower than the liquid level control port. The top of the pre-melting pot is provided with a filler port for replenishing solid raw materials. The preset height is located above the lower end of the liquid outlet of the pre-melting pot.

2. The method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot according to claim 1, characterized in that: The cantilever device further includes a support section for supporting the suspension section. The top end of the support section is fixedly connected to the suspension section, and the bottom end of the support section is provided with a base. The base includes a chassis, a turntable, and a rotating shaft. The chassis is placed on the ground, and the turntable is rotatably connected above the chassis through the rotating shaft. The bottom end of the support section is fixedly installed on the turntable.

3. The method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot according to claim 2, characterized in that: The liquid level control ingot is a long strip of zinc-aluminum alloy. The metal content ratio of the zinc-aluminum alloy is the same as that of the zinc-aluminum raw material in the pre-melting pot. The liquid level control ingot can enter the pre-melting pot through the liquid level control port.

4. The method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot according to claim 3, characterized in that: A storage space is provided next to the cantilever device, and the storage space is used to stack liquid level control ingots. When the weight of the liquid level control ingot held by the clamping mechanism is less than the preset weight, the translation mechanism, lifting mechanism and base are controlled to move the clamping mechanism to the storage position, and the clamping mechanism is controlled to replace the liquid level control ingot being held. The weight of the liquid level control ingot being replaced is greater than the preset weight, and the unloaded liquid level control ingot is used as solid raw material to be added to the filler port.

5. The method for controlling the liquid level in a zinc-aluminum ingot pre-melting pot according to claim 4, characterized in that: The volume of the liquid level control ingot whose weight is equal to the preset weight is greater than the volume between the lower end of the liquid outlet in the pre-melting pot and the preset height.

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