Induction furnace alloy rod delivery device

Abstract

The application discloses an alloy rod feeding device for an induction furnace, and belongs to the field of casting. The alloy rod feeding device comprises a protective cover, a sleeve is arranged at the top of the protective cover, the bottom end of the sleeve penetrates through the protective cover, the sleeve is inclined towards one side, a rod feeding pipe is movably inserted into the top end of the sleeve, the protective cover is arranged in a bucket shape, the top end of the protective cover is provided with a platform, the sleeve is arranged on the platform, the inclination angle of the sleeve ranges from 40 to 50 degrees, and a circular arc chamfer is arranged between the sleeve and the platform. The alloy rod feeding device has the advantages that the alloy rod can automatically slide to the deep part of molten steel by the inclined arrangement of the sleeve, the operator only needs to put the alloy rod into the top end of the rod feeding pipe, the problem of small induction furnaces in adding easily-oxidized and escaped alloy materials is solved, and an effective solution is provided for the refining of the small induction furnace.

Description

Technical Field

[0001] This application relates to the field of casting, and more specifically, to an induction furnace alloy rod feeding device. Background Technology

[0002] In the foundry industry, especially in precision casting, induction furnaces have been widely used due to their advantages such as rapid heating, precise temperature control, high thermal efficiency, and ease of automation. However, the capacity of induction furnaces used in this industry is generally small, mostly ranging from 0.03 tons to 1 ton. Unlike large steel mills, which possess mature metallurgical processes developed on the basis of handling tens or even hundreds of tons of molten steel, these large-scale induction furnaces have complete supporting equipment and processes, enabling comprehensive and refined refining of large-scale molten steel to ensure that alloying elements are uniformly and efficiently incorporated into the molten steel, achieving high-quality alloying. However, for small-capacity induction furnaces, due to the small amount of molten steel, it is impossible to directly apply these mature metallurgical processes from large steel mills.

[0003] Taking the addition of nitrogen, an alloying element that is easily oxidized and escapes, as an example, traditional methods such as adding it at the furnace mouth and bottom smelting are commonly used in the steel smelting process in the foundry industry. Specifically, in the application of alloy rods, the alloying agents used in the foundry industry, such as manganese nitride, chromium nitride, and silicon-calcium alloys, are relatively light in weight and often float on the surface of the molten steel during smelting. The alloying elements are exposed to air for too long at high temperatures, leading to severe oxidation and low effective yield. Therefore, this application proposes an alloy rod feeding device for induction furnaces. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] The purpose of this application is to address the shortcomings of the prior art by providing an alloy rod feeding device for an induction furnace, thereby solving the problem of low effective yield when adding easily oxidized and escaped alloy materials in small induction furnaces in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: An induction furnace alloy rod feeding device includes a protective cover, a sleeve is provided on the top of the protective cover, the bottom end of the sleeve penetrates the protective cover, and the sleeve is tilted to one side, and a rod feeding tube is movably inserted into the top of the sleeve.

[0007] Furthermore, the protective cover is configured as a bucket-shaped structure, with a platform at the top of the protective cover, and the sleeve is disposed on the platform.

[0008] Furthermore, the inclination angle of the sleeve is in the range of 40 to 50°, and a rounded chamfer is provided between the sleeve and the platform.

[0009] Furthermore, a ring plate is provided at the bottom of the protective cover, and multiple handles are evenly arranged around the protective cover on the ring plate.

[0010] Furthermore, the lower surfaces of the ring plate and the protective cover are coated with a fire-resistant coating.

[0011] Furthermore, a suspension plate is provided on the platform inside the protective cover. The suspension plate is located on the other side of the inclined direction of the sleeve, and the top of the suspension plate is hinged. The suspension plate can swing in the inclined direction of the sleeve.

[0012] Furthermore, a cone is provided at the top of the throwing tube, and a retaining ring is provided on the side wall of the throwing tube near the bottom, the diameter of which is larger than the diameter of the sleeve.

[0013] The beneficial effects of this application are as follows: In traditional casting, when adding nitrogen, an easily oxidized and escaping alloying element, to molten steel, methods such as adding it at the furnace mouth or smelting it at the bottom of the ladle are commonly used. However, because the alloying element has prolonged contact with air in the high-temperature zone, it suffers from severe oxidation and a very low effective yield. This device can deliver the alloy rod deep into the molten steel in the induction furnace, reducing the contact time between the rod and air, significantly reducing the degree of oxidation of the alloying element, improving the yield, and lowering production costs. It solves the problem of adding easily oxidized and escaping alloying materials in small induction furnaces, providing an effective solution for refining in small induction furnaces.

[0014] With the inclined design of the sleeve, the operator only needs to place the alloy rod at the top of the casting tube, and the alloy rod will automatically slide down into the depth of the molten steel. The operation is simple and convenient. The inclined sleeve can prevent the molten steel from splashing out of the sleeve. The hinged design of the suspension plate can block and buffer the alloy rod, buffer the impact of the alloy rod sliding down at an incline, and change the trajectory of the alloy rod so that it falls vertically into the depth of the molten steel. This alleviates problems such as splashing caused by the alloy rod falling into the surface of the molten steel, and improves the safety and effectiveness of the casting. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0016] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a top view of this application; Figure 3 This is the front view of this application; Figure 4 This is a schematic diagram of the structure after the protective cover of this application has been removed from the rod-feeding tube; Figure 5 This is a schematic diagram of the structure of the rod feeding tube in this application; Figure 6 This is a cross-sectional view of the protective cover of this application; Figure 7 This is a schematic diagram of the structure of the induction furnace applied in this application.

[0018] Figure label: 1. Protective cover; 2. Platform; 3. Sleeve; 4. Rod feeding tube; 5. Ring plate; 6. Handle; 7. Retaining ring; 8. Cone; 9. Suspension plate; 10. Furnace body. Detailed Implementation

[0019] The following is a detailed description of an alloy rod feeding device for an induction furnace provided in this application, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this application.

[0020] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0021] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0022] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figure 1-7 As shown, this utility model provides an alloy rod feeding device for an induction furnace, including a protective cover 1, a sleeve 3, a feeding tube 4, and a suspension plate 9. The protective cover 1 is configured as a bucket-shaped structure, with a platform 2 at the top. The entire protective cover 1 is placed on the furnace body 10 to prevent molten steel from splashing during the alloy rod feeding process. A ring plate 5 is provided at the bottom of the protective cover 1, and multiple handles 6 are evenly arranged around the protective cover 1 on the ring plate 5 to facilitate the operation of the operator using lifting tools to lift the protective cover 1. To enhance the refractory performance of the protective cover 1 and the ring plate 5, a refractory coating is applied to the lower surface of the protective cover 1 and the ring plate 5. The refractory coating is neutral or acidic.

[0024] Furthermore, in this embodiment, a sleeve 3 is provided on the platform 2. The sleeve 3 is tilted to one side, with an tilt angle ranging from 40° to 50°, and a rounded chamfer is provided between the sleeve 3 and the platform 2. The bottom end of the sleeve 3 penetrates the protective cover 1, allowing the alloy rod to slide smoothly into the furnace body 10 along the sleeve 3. The rod-feeding tube 4 is movably inserted into the top end of the sleeve 3, and a cone 8 is provided at the top end of the rod-feeding tube 4 to facilitate the operator in placing the alloy rod into the rod-feeding tube 4. A retaining ring 7 is provided on the side wall near the bottom end of the rod-feeding tube 4. The diameter of the retaining ring 7 is larger than the diameter of the sleeve 3 to prevent the rod-feeding tube 4 from sliding completely into the sleeve 3. The inner diameter of the rod-feeding tube 4 is 20mm to 100mm.

[0025] Furthermore, in this embodiment, a suspension plate 9 is provided at the platform 2 inside the protective cover 1. The suspension plate 9 is located on the other side of the inclined direction of the sleeve 3. The top of the suspension plate 9 is hinged and can swing towards the inclined direction of the sleeve 3.

[0026] In actual operation, the operator places the alloy rod (the alloy rod is made of thin low-carbon steel or heat-resistant stainless steel as the outer cladding material, and internally encapsulated with easily oxidized and escaped alloy powder such as nitride alloy; the diameter is 5mm to 50mm, and the length is 200mm to 2000mm; generally, each rod is used independently, but two alloy rods can also be easily connected to achieve multiple rods being thrown together) into the cone 8 at the top of the rod throwing tube 4. The alloy rod slides down the inclined rod throwing tube 4 and sleeve 3 into the furnace body 10. When the alloy rod passes through the rod throwing tube 4 and sleeve 3, the alloy rod hits the suspension plate 9. The suspension plate 9 uses its hinged structure to block and buffer the alloy rod, buffering the impact of the alloy rod sliding down at an incline, and at the same time changing the trajectory of the alloy rod, so that the alloy rod falls vertically into the depth of the molten steel in the furnace body 10.

[0027] Working Principle: In operation, the alloy rod feeding device for this induction furnace inserts the alloy rod from the top of the feeding tube 4. Due to the inclined design of the feeding tube 4 and the sleeve 3, the alloy rod slides down along the inclined direction under the influence of gravity. During the descent, the alloy rod impacts the suspension plate 9, which is hinged inside the protective cover 1. Upon impact, the suspension plate 9 swings, generating a reverse force on the alloy rod. This force buffers the impact of the inclined slide, preventing the alloy rod from impacting the molten steel surface at excessive speed and causing splashing; it also alters the trajectory of the alloy rod, changing its downward trajectory from an inclined state to a vertical fall into the depths of the molten steel within the furnace body 10.

[0028] Because alloying agents used in the casting industry, such as manganese nitride, chromium nitride, and silicon-calcium alloys, are relatively light in weight, they tend to float on the surface of molten steel during smelting, leading to severe oxidation and generally low absorption rates. This device, however, utilizes the aforementioned working principle to deliver the alloy rod directly to the depths of the molten steel, reducing the contact time between the alloy rod and air. This effectively reduces the oxidation level of the alloying elements and improves their recovery rate.

[0029] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

[0030] It should be noted that this application covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of this application. To provide the public with a thorough understanding of this application, specific details are described in detail in the preferred embodiments, while those skilled in the art can fully understand this application without these details. Furthermore, to avoid unnecessary confusion regarding the substance of this application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0031] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An induction furnace alloy rod feeding device, comprising a protective cover (1), characterized in that: The protective cover (1) is provided with a sleeve (3) at the top, the bottom end of the sleeve (3) penetrates the protective cover (1), and the sleeve (3) is tilted to one side. The top end of the sleeve (3) is movably inserted with a throwing rod tube (4).

2. The induction furnace alloy rod feeder of claim 1 wherein: The protective cover (1) is configured as a bucket-shaped structure, and the top of the protective cover (1) has a platform (2), and the sleeve (3) is set on the platform (2).

3. The induction furnace alloy rod feeder of claim 1 wherein: The inclination angle of the sleeve (3) is in the range of 40 to 50°, and a rounded chamfer is provided between the sleeve (3) and the platform (2).

4. The induction furnace alloy rod feeder of claim 1 wherein: The bottom of the protective cover (1) is provided with a ring plate (5), and multiple handles (6) are evenly arranged around the protective cover (1) on the ring plate (5).

5. The induction furnace alloy rod feeding device according to claim 4, characterized in that: The lower surfaces of the ring plate (5) and the protective cover (1) are coated with fire-resistant paint.

6. The induction furnace alloy rod feeder of claim 1 wherein: The protective cover (1) has a suspension plate (9) installed on the platform (2) inside. The suspension plate (9) is located on the other side of the inclined direction of the sleeve (3). The top of the suspension plate (9) is hinged and can swing towards the inclined direction of the sleeve (3).

7. The induction furnace alloy rod feeding device according to claim 1, characterized in that: The top of the throwing tube (4) is provided with a cone (8), and a retaining ring (7) is provided on the side wall of the throwing tube (4) near the bottom. The diameter of the retaining ring (7) is larger than the diameter of the sleeve (3).

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