Iron removal device for secondary aluminum smelting

Abstract

The utility model belongs to the technical field of non-ferrous metal regenerative smelting, and discloses a secondary aluminum smelting iron removal device which comprises a machine box, a furnace body is installed on the top of the machine box, and a sectional type electromagnetic coil set is installed on the outer side wall of the furnace body in a surrounding mode. A control unit is installed on the side wall of the machine box, and the sectional type electromagnetic coil sets are electrically connected with the control unit. According to the technical scheme, the structure is stable, use is easy and convenient, it is guaranteed that molten aluminum is evenly stirred, secondary aluminum smelting time is shortened, and working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of non-ferrous metal recycling and smelting technology, and in particular relates to a device for removing iron in recycled aluminum smelting. Background Technology

[0002] In the process of recycled aluminum, iron impurities mixed in with scrap aluminum can lead to a decline in the performance of aluminum materials. Traditional processes, such as magnetic separation, flocculants, and refining, suffer from low iron removal efficiency (only 20-58%) and high energy consumption (>800 kWh / t). Furthermore, during the smelting process, the iron impurities in the scrap aluminum have complex origins, and their presence can negatively impact the performance of recycled aluminum alloys, hindering their widespread application. Therefore, electromagnetic melting purification of recycled aluminum is necessary. While existing electromagnetic melting furnaces improve heating efficiency, they do not solve the problem of iron phase separation. Utility Model Content

[0003] The purpose of this invention is to provide a device for removing iron during the smelting of recycled aluminum, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides a recycled aluminum smelting iron removal device, including a chassis, a furnace body installed on the top of the chassis, and a segmented electromagnetic coil group installed around the outer side wall of the furnace body; a control unit is installed on the side wall of the chassis, and the segmented electromagnetic coil group is electrically connected to the control unit.

[0005] Optionally, a crucible is installed inside the furnace body.

[0006] Optionally, the furnace body is a cylindrical furnace body, and the inner wall of the cylindrical furnace body is provided with an alumina-silicon carbide composite layer.

[0007] Optionally, the segmented electromagnetic coil group includes an upper coil and a lower coil that are electrically connected to the control unit, respectively.

[0008] Optionally, it also includes a multispectral infrared temperature measurement unit, which is electrically connected to the control unit.

[0009] Optionally, the control unit includes a temperature control module, a magnetic field strength module, a heating time control module, and a dual-channel frequency converter.

[0010] Optionally, the bottom of the chassis is equipped with several casters.

[0011] The technical effects of this utility model are as follows:

[0012] This invention boasts advantages such as portability, adjustable temperature, adjustable magnetic field strength, short melting time, high measurement accuracy, and high iron removal rate, making it suitable for melting in various scenarios, including laboratories and on-site operations. Furthermore, addressing the shortcomings of existing technologies such as low iron removal efficiency (≤75%), high energy consumption (>800kWh / t), and poor temperature control accuracy, this patent proposes a dynamic iron removal system that links a segmented electromagnetic field structure with the melt state. This device features a stable structure, is simple and convenient to use, ensures uniform stirring of the molten aluminum, shortens the smelting time for recycled aluminum, and improves work efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] 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:

[0015] Figure 1 This is a schematic diagram of the overall structure of the device in the embodiment of this utility model;

[0016] Labeling: 1. Chassis; 2. PLC medium frequency numerical control panel; 3. Display screen; 4. Casters; 5. Segmented electromagnetic coil group; 6. Graphite crucible. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 As shown, this embodiment provides a recycled aluminum smelting iron removal device, including a chassis 1, a furnace body installed on the top of the chassis 1, and a segmented electromagnetic coil group 5 installed around the outer side wall of the furnace body; a control unit is installed on the side wall of the chassis 1, and the segmented electromagnetic coil group 5 is electrically connected to the control unit.

[0024] This embodiment provides a segmented electromagnetic field melting device, which forms a gradient magnetic field in the melt through independently controlled upper and lower electromagnetic coil groups, causing the iron phase to accumulate at the bottom and achieving efficient iron removal (measured iron removal rate > 80%).

[0025] This embodiment discloses a regenerated aluminum smelting iron removal device based on gradient electromagnetic fields, belonging to the field of non-ferrous metal regeneration smelting technology. The device includes a sliding mechanism, a PLC medium-frequency digital control panel 2 with segmented control function, a main unit, a chassis 1, a segmented electromagnetic coil group 5, and an infrared temperature controller.

[0026] The chassis 1 is equipped with a top cover and casters 4 at the bottom for easy movement and fixation. In this embodiment, the casters 4 at the bottom of the chassis make it convenient for users to move the main unit to different locations for melting, which is particularly suitable for laboratory and field measurements.

[0027] The PLC medium-frequency digital control panel 2 is located at the top front of the main unit chassis 1. It includes buttons for start, stop, frequency, current, voltage, power, and program conversion, and can control parameters such as melting temperature, magnetic field strength, heating time, and holding time according to melting requirements.

[0028] The PLC medium frequency numerical control panel 2 integrates a display screen 3 and several control buttons, providing a user-friendly interface for easy operation.

[0029] The main unit has smelting heating, electromagnetic automatic stirring, and temperature controller, which are used to display and control the temperature of the smelting metal during smelting, and automatically stop heating or maintain the temperature when the temperature is reached.

[0030] The segmented electromagnetic coil assembly 5 is located on the top of the main unit chassis 1, flush with the top plate. The induction coil can be segmented to control the temperature, magnetic field strength, heating time, and holding time. By controlling the temperature, magnetic field strength, and heating time, the recycled aluminum is brought to a molten state. Based on the difference in magnetic field strength at the upper and lower ends of the induction coil, the iron-containing substances in the refined recycled aluminum melt are relatively concentrated at the bottom of the melt, thus separating the recycled aluminum melt from the iron and achieving the purification of the recycled aluminum.

[0031] The segmented electromagnetic coil group 5 in this embodiment includes independently controlled upper and lower coils. The upper coil operates at a frequency of 3-5 kHz with a turn pitch of 120-180 mm; the lower coil operates at a frequency of 8-12 kHz with a turn pitch of 60-100 mm. The lower coil generates an axial magnetic field gradient ≥0.3 T / m and a radial magnetic field gradient ≤0.1 T / m. The turns ratio of the upper coil to the lower coil is 1:1.8 to 2.2, and the conductor cross-sectional area ratio is 1.2:1.

[0032] The dual-channel frequency converter power supply has the function of independently adjusting the phase difference between the upper and lower coils, with a phase adjustment range of 0°-180°. During the iron phase enrichment stage, the dual-channel frequency converter power supply controls the phase difference between the upper and lower coils to 90°±5°, at which point the accumulation rate of iron slag at the bottom increases by 40%±5%.

[0033] In this embodiment, the magnetic field strength can be controlled in segments. A gradient magnetic field is formed in the melt by independently controlled upper and lower electromagnetic coil groups, which meets the iron removal requirements of the recycled aluminum melt and improves the iron removal rate.

[0034] The infrared temperature controller is a tripod device placed independently outside the main unit. It includes an infrared temperature sensor for real-time monitoring of the temperature at the bottom of the graphite crucible 6. The measurable temperature range is 250℃-1400℃.

[0035] This embodiment employs a multispectral infrared temperature measurement system, which includes at least three temperature measurement points. ( The three temperature measuring points are located at the top, middle, and bottom of the crucible, respectively. ) ，The multispectral infrared temperature measurement system is equipped with a dynamic emissivity compensation module and includes: a 3-5μm band sensor for measurement in the 700-850℃ range and an 8-12μm band sensor for measurement in the 600-750℃ range.

[0036] This embodiment uses an infrared temperature sensor and a data processing module to monitor the temperature at the bottom of the graphite crucible 6 in real time, ensuring the accuracy of the measurement results.

[0037] The graphite crucible 6 is installed inside a cylindrical furnace body with a height-to-diameter ratio of 1:1.1 to 1.3, and its inner lining includes an alumina-silicon carbide composite layer.

[0038] This embodiment boasts advantages such as portability, adjustable temperature, adjustable magnetic field strength, short melting time, high measurement accuracy, and high iron removal rate, making it suitable for melting in various scenarios, including laboratories and on-site operations. Furthermore, addressing the shortcomings of existing technologies such as low iron removal efficiency (≤75%), high energy consumption (>800kWh / t), and poor temperature control accuracy, this patent proposes a dynamic iron removal system that links a segmented electromagnetic field structure with the melt state. This device features a stable structure, is simple and convenient to use, ensures uniform stirring of the molten aluminum, shortens the smelting time for recycled aluminum, and improves work efficiency.

[0039] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for removing iron from a recycled aluminum melt, characterized in that Includes a chassis (1), on the top of which a furnace body is mounted, and a segmented electromagnetic coil group (5) is mounted around the outer side wall of the furnace body; a control unit is mounted on the side wall of the chassis (1), and the segmented electromagnetic coil group (5) is electrically connected to the control unit.

2. The apparatus for removing iron from recycled aluminum smelting according to claim 1, wherein A crucible is installed inside the furnace body.

3. The apparatus for removing iron from recycled aluminum smelting according to claim 2, wherein The furnace body is cylindrical, and the inner wall of the cylindrical furnace body is provided with an alumina-silicon carbide composite layer.

4. The apparatus for removing iron from recycled aluminum smelting according to claim 1, wherein The segmented electromagnetic coil group (5) includes an upper coil and a lower coil that are electrically connected to the control unit, respectively.

5. The apparatus for removing iron from recycled aluminum smelting as claimed in claim 1, wherein It also includes a multispectral infrared temperature measurement unit, which is electrically connected to the control unit.

6. The apparatus for removing iron from recycled aluminum smelting according to claim 1, wherein The control unit includes a temperature control module, a magnetic field strength module, a heating time control module, and a dual-channel frequency converter.

7. The apparatus for removing iron from recycled aluminum smelting according to claim 1, wherein The bottom of the chassis (1) is equipped with several casters (4).

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