Filtering device for preventing ash from being transferred into smelting furnace in molten aluminum ladle process
By using a round table-shaped filter device during the aluminum liquid bag lifting process, the impurities in the bag lifting are isolated, and the quality pollution problem caused by impurities entering the furnace in aluminum alloy production is solved, and the effect of reducing impurities in the furnace and reducing production costs is achieved.
Patent Information
- Application Number
- CN202420803084.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-18
AI Technical Summary
During the aluminum alloy production process, impurities in the aluminum liquid such as carbon slag, electrolyte and aluminum ash enter the furnace with aluminum water, resulting in melt mass pollution and increasing production costs and labor intensity.
A filter device is designed for the process of lifting the aluminum liquid bag. The device body is in the shape of a round table and is hollow inside. A side grille is provided between the bottom and the upper part to isolate the impurities in the lifting the bag and prevent it from entering the furnace.
It effectively isolates most of the impurities in the lifting bag, reduces the impurities content in the furnace, and reduces the secondary pollution of the impurities in the aluminum water by the aluminum liquid during the transfer process, thereby reducing the refining time and cost of the melting furnace.
Smart Images
Figure CN222588105U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cleaning impurities in a molten aluminum ladle, and in particular relates to a filtering device used for preventing ash slag from transferring into a melting furnace during the molten aluminum ladle lifting process. Background Art
[0002] In the production process of aluminum alloy, the purity of the melt is the most critical factor to ensure the quality of the product, especially in the process of directly using electrolytic aluminum liquid to produce alloy. Due to the special production process of the electrolytic cell, the aluminum liquid extracted from the electrolytic cell contains a large amount of impurities such as carbon slag, electrolyte, aluminum ash, etc. These impurities float on the surface of the aluminum liquid in the ladle. When the aluminum liquid in the ladle is transferred to the smelting furnace, the impurities enter the smelting furnace along with the aluminum liquid, causing secondary pollution to the melt quality, increasing the cost and labor intensity of the melt refining process and the hidden dangers of the melt quality.
[0003] In the production of aluminum electrolysis and aluminum alloys, the transfer and pouring of molten aluminum through ladle transfer is an essential process in production. Most of the traditional processes adopt the method of direct transfer from the ladle. This transfer method is to transfer the molten aluminum in the ladle and all the impurities in the ladle into the smelting furnace, and then separate them through the refining and slagging process; in the production of high-end products such as double-zero aluminum foil, battery foil, can materials and other products with high quality requirements, in order to reduce the impurities in the smelting furnace entering the furnace and causing secondary pollution during the transfer process, some companies use the siphon method to transfer the molten aluminum in the ladle into the smelting furnace. Although this method is effective, it requires more auxiliary equipment, such as siphon pipes, compressed air with sufficient pressure required for siphoning, and the smelting furnace must be equipped with a front furnace that is long-term filled with high-temperature liquid aluminum. Therefore, this siphon undercurrent transfer method has low production efficiency, and the molten aluminum in the ladle cannot be completely transferred, which greatly increases the production cost. Utility Model Content
[0004] The purpose of the utility model is to solve the above-mentioned problem. The present application proposes a filtering device for preventing ash from being transferred into the furnace during the aluminum liquid lifting process. During the aluminum liquid transfer process, most of the impurities in the lifting ladle are effectively isolated in the lifting ladle, and the impurities are not allowed to enter the smelting furnace along with the aluminum liquid, thereby reducing the amount of impurities in the furnace and reducing the secondary pollution of the aluminum liquid caused by the impurities in the aluminum liquid being impacted by the aluminum liquid into the melt during the transfer process.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a filtering device for preventing ash from being transferred into a furnace during the process of lifting a ladle of molten aluminum, comprising a device body installed at the ladle outlet, the device body being in a truncated cone shape and having a hollow interior, the bottom diameter of the device body being smaller than the upper diameter, a side grid composed of a plurality of round bars being arranged between the bottom and the upper part, the upper part of the device body being open, the bottom being provided with a bottom grid composed of a plurality of round bars, and fixing ears being arranged at both ends of the upper part of the device body.
[0006] Furthermore, the round bars constituting the edge grille, the round bars constituting the bottom grille, the bottom, the top and the fixing ears are all made of φ15 stainless steel.
[0007] Further: the fixing ear is aligned with the bayonet of the aluminum liquid lifting bag cover, and the device body is fixed by a stainless steel rod.
[0008] Furthermore: the round bars of the side grid are evenly arranged at a spacing of 50 mm, and the round bars of the bottom grid are evenly arranged at a spacing of 35 mm.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] This device is placed in advance at the aluminum outlet of the ladle, and a stainless steel rod is inserted to lock it, so that most of the impurities in the ladle are isolated in the ladle, preventing the impurities from entering the smelting furnace along with the molten aluminum, which not only reduces the impurity content in the smelting furnace, but also reduces the secondary pollution of the molten aluminum caused by the impurities in the molten aluminum being impacted by the molten aluminum during the transfer process. Since most of the impurities in the ladle remain in the ladle, the amount of slag in the smelting furnace is reduced, thereby reducing the time for refining the melt in the smelting furnace and the amount of refining agent used, and at the same time reducing the amount of slag removal, so that the aluminum alloy casting burn loss is reduced. This device has a simple structure and obvious effects, is easy to use, and avoids the mixing of direct transfer aluminum slag to cause secondary pollution affecting the quality of the furnace, and also avoids the problem of a large amount of aluminum being removed during the slag removal process to remove the oxide film, causing a sharp increase in the aluminum alloy casting burn loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the utility model or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0012] Figure 1 This is a schematic diagram of the overall structure of the device body of the utility model;
[0013] In the figure: 1 - bottom grille, 2 - side grille, 3 - fixing ears, 4 - upper part. DETAILED DESCRIPTION
[0014] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, the utility model is further described below in conjunction with specific embodiments. However, the embodiments are only used as an explanation of the utility model and are not intended to limit the utility model.
[0015] like Figure 1 A filtering device for preventing ash from entering a furnace during the aluminum liquid ladle lifting process is shown, comprising a device body installed at the ladle outlet, the device body consisting of an upper part, a bottom, and fixed ears, the device body is truncated cone-shaped and hollow inside, the bottom diameter of the device body is smaller than the diameter of the upper part 4, the structure of a larger upper part and a smaller lower part is convenient for installation and removal, a side grid 2 composed of a plurality of round bars is provided between the bottom and the upper part 4, the round bars of the side grid 2 are evenly arranged at a spacing of 50 mm, the upper part 4 of the device body is open, and a bottom grid 1 composed of a plurality of round bars is laid on the bottom, the round bars of the bottom grid 1 are evenly arranged at a spacing of 35 mm, and fixed ears 3 are provided at both ends of the upper part 4 of the device body, so that most of the aluminum slag can be isolated in the ladle, and only a small part enters the ladle, thereby achieving the purpose of filtering.
[0016] The round bars constituting the side grid 2, the round bars constituting the bottom grid 1, the bottom, the upper part 4 and the fixing ears 3 are all made of φ15 stainless steel material.
[0017] The fixing ear 3 is aligned with the bayonet of the aluminum liquid lifting bag cover and is fixed to the device body through a stainless steel rod.
[0018] Preferably, the size of the filtering device can be made according to the size and depth of the ladle.
[0019] How it works
[0020] 1. Use the traditional method to safely open the aluminum outlet cover of the lifting bag according to the operating procedures;
[0021] 2. Place the device in the aluminum outlet of the ladle, and make sure the fixing ear is flush with the bayonet of the ladle cover;
[0022] 3. Insert the stainless steel rod into the fixing ear of the device and the bayonet of the bag lifting cover to fix the device to prevent it from slipping out during transfer;
[0023] 4. After the device is fixed, it can be operated according to the normal aluminum liquid transfer method;
[0024] 5. After the transfer is completed, pull out the stainless steel rod, take out the filter device, apply protective paint on it and bake it for use, and at the same time pour the slag in the lifting bag into the slag box;
[0025] 6. The bag is lifted and reset, and the transfer is completed.
[0026] The ladle and the transfer process of the aluminum water tank furnace in the ladle mentioned in the utility model are already mature technologies in the prior art, and no improvement is made in the utility model, so it is not elaborated in detail.
[0027] The contents not described in detail in the present invention are all prior art.
[0028] The above is only a preferred embodiment of the utility model, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application should be included in the scope of the utility model patent application.
Claims
1. A filtering device for preventing ash from entering a furnace during the process of lifting a ladle of molten aluminum, comprising a device body installed at the ladle outlet, characterized in that: The device body is truncated cone-shaped and hollow inside. The diameter of the bottom of the device body is smaller than the diameter of the upper part (4). A side grid (2) composed of a plurality of round bars is provided between the bottom and the upper part (4). The upper part (4) of the device body is open, and a bottom grid (1) composed of a plurality of round bars is laid on the bottom. Fixing ears (3) are provided at both ends of the upper part (4) of the device body.
2. The filtering device for preventing ash from entering the furnace during the aluminum liquid ladle lifting process according to claim 1 is characterized in that: The round bars constituting the side grille (2), the round bars constituting the bottom grille (1), the bottom, the top (4) and the fixing ears (3) are all made of φ15 stainless steel.
3. The filtering device for preventing ash from entering the furnace during the aluminum liquid ladle lifting process according to claim 1 is characterized in that: The fixing ear (3) is aligned with the snap-on opening of the aluminum liquid lifting bag cover and is fixed to the device body through a stainless steel rod.
4. The filtering device for preventing ash from entering the furnace during the aluminum liquid ladle lifting process according to claim 1 is characterized in that: The round bars of the side grid (2) are evenly arranged at a spacing of 50 mm, and the round bars of the bottom grid (1) are evenly arranged at a spacing of 35 mm.