A dust suction protection device for the mouth of a medium frequency smelting furnace

Abstract

The utility model relates to belong to the technical field of heating furnace, especially a kind of dust absorption protection device for the mouth of intermediate frequency smelting furnace, including the cover of the mouth of intermediate frequency smelting furnace, the side of cover is equipped with dust exhaust interface, the middle part of cover is equipped with upper cover mouth and lower cover mouth, upper cover mouth is conical, the size of lower cover mouth is consistent, and it is set along the arc surface of the mouth of intermediate frequency smelting furnace, dust suction port is equipped on lower cover mouth, and multiple reinforcing rib plates are distributed along the circumference of lower cover mouth in the inside of cover. The included angle of the conical surface of upper cover mouth and horizontal direction is 18°-22°. The utility model is conical, and steel material can be directly slid into smelting furnace when charging, reduce the problem of raw material scattering. Significantly improve the smelting efficiency of the mouth of intermediate frequency furnace, reduce the operation risk coefficient, reduce labor intensity.

Description

Technical Field

[0001] This utility model belongs to the field of heating furnace technology, and specifically relates to a dust collection and protection device for the furnace mouth of a medium-frequency melting furnace. Background Technology

[0002] The existing medium-frequency induction furnace uses a top-mounted dust extraction device for feeding. Because the top surface of this device is horizontal, when pig iron and scrap steel are added to the furnace via a hopper or disc, some raw materials fall onto the dust extraction device, scattering onto the workbench or into the pit. The pig iron and scrap steel scattered on the dust extraction device and workbench need to be manually picked up by workers and thrown back into the furnace. At this point, the furnace is operating at increased power, and manual picking and throwing of these materials increases the risk of molten iron splashing and causing injury. This operation is highly dangerous, inefficient, and involves high labor intensity and low safety for workers. Furthermore, some raw materials (pig iron and scrap steel) scattered into the pit are discharged with the slag, failing to meet slag removal requirements and resulting in material waste. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a dust collection and protection device for the furnace mouth of a medium-frequency melting furnace, so as to solve the problem of raw materials scattering outside the furnace during the feeding process of a medium-frequency melting furnace.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dust extraction and protection device for the furnace opening of a medium-frequency melting furnace includes a cover body installed above the furnace opening of the medium-frequency melting furnace. A dust discharge port is provided on one side of the cover body. An upper cover opening and a lower cover opening are provided in the middle of the cover body. The upper cover opening is conical, and the lower cover opening has the same size at the top and bottom and is set along the arc surface of the furnace opening of the medium-frequency melting furnace. A dust extraction port is provided on the lower cover opening. Multiple reinforcing ribs are distributed along the circumference of the lower cover opening inside the cover body.

[0006] The angle between the conical surface of the upper cover and the horizontal direction is 18°-22°.

[0007] The height of the lower cover opening is 120-150mm.

[0008] The suction port is a long, flat hole with a width of 30-40mm.

[0009] The reinforcing ribs are spaced at the same angle, and the top surface of the reinforcing ribs has the same taper as the upper cover opening, and they are tightly connected to its inner wall.

[0010] The outer periphery of the cover is provided with multiple fixing frames, which are used to fix and connect to the medium frequency melting furnace. The fixing frames are spaced at the same angle.

[0011] Compared with existing technologies, the beneficial effects of this utility model are:

[0012] This invention features a conical upper hood, allowing steel materials to slide directly into the smelting furnace during charging, reducing the problem of raw material spillage. It significantly improves the charging and smelting efficiency of medium-frequency furnaces, reduces operational risks, and lowers labor intensity.

[0013] The reinforcing ribs inside the cover along the lower opening support and fix the upper surface of the cover, preventing deformation caused by material handling and extending its service life, thus saving on remanufacturing costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a top view of the present invention. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figures 1-2 A dust extraction and protection device for the furnace opening of a medium-frequency melting furnace includes a cover 2 installed above the furnace opening of a medium-frequency melting furnace 1. A dust discharge port 3 is provided on one side of the cover 2. An upper cover opening 4 and a lower cover opening 5 are provided in the middle of the cover 2. The upper cover opening 4 is conical, and the lower cover opening 5 has the same upper and lower dimensions and is set along the arc surface of the furnace opening of the medium-frequency melting furnace 1. A dust extraction port 6 is provided on the lower cover opening 5. Multiple reinforcing ribs 7 are distributed along the circumference of the lower cover opening 5 inside the cover 2.

[0019] The angle between the conical surface of the upper cover opening 4 and the horizontal direction is 18°-22°.

[0020] The height of the lower cover opening 5 is 120-150mm.

[0021] The suction port 6 is a long, flat hole with a width of 30-40mm.

[0022] The reinforcing ribs 7 are spaced at the same angle, and the top surface of the reinforcing ribs 7 is consistent with the taper of the upper cover opening 4, and is tightly connected to its inner wall.

[0023] The outer periphery of the cover 1 is provided with multiple fixing frames 8, which are used to fix the medium frequency melting furnace 1. The fixing frames 8 are spaced at the same angle.

[0024] The dust discharge port 3 of the above-mentioned device is connected to a dust discharge pipe with suction capability, so that the smoke and dust inside the cover 2 can be discharged to the outside.

[0025] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Example 1:

[0027] A dust extraction and protection device for the inlet of a medium-frequency induction furnace includes a cover 2 installed above the inlet of the furnace 1. A dust discharge port 3 is provided on one side of the cover 2. An upper cover opening 4 and a lower cover opening 5 are located in the middle of the cover 2. The upper cover opening 4 is conical, with the conical surface forming an angle of 18° with the horizontal direction. During charging, steel materials can slide directly into the furnace, reducing the problem of raw material spillage.

[0028] Nine reinforcing ribs 7 are distributed around the lower opening 5 inside the cover body 1. The reinforcing ribs 7 are spaced at an angle of 34°, and the top surface of the reinforcing ribs 7 matches the taper of the upper opening 4 and is tightly connected to its inner wall. This prevents deformation caused by material feeding collisions.

[0029] The lower hood 5 has the same dimensions at both ends and is set along the arc surface of the furnace mouth of the medium-frequency melting furnace 1. The height of the lower hood 5 is 125mm. A dust suction port 6 is provided on the lower hood 5. The dust suction port 6 is a long, flat hole with a width of 30mm. This ensures that the dust suction capacity of the lower hood 5 is consistent around its circumference.

[0030] Example 2:

[0031] A dust extraction and protection device for the furnace opening of a medium-frequency melting furnace includes a cover 2 installed at the furnace opening of a medium-frequency melting furnace 1. A dust discharge port 3 is provided on one side of the cover 2. An upper cover opening 4 and a lower cover opening 5 are provided in the middle of the cover 2. The upper cover opening 4 is conical, and the angle between the conical surface and the horizontal direction is 20°.

[0032] Nine reinforcing ribs 7 are distributed around the lower opening 5 inside the cover 1. The reinforcing ribs 7 are spaced at an angle of 34°, and the top surface of the reinforcing ribs 7 is consistent with the taper of the upper opening 4 and is tightly connected to its inner wall.

[0033] The lower hood 5 has the same dimensions both top and bottom and is set along the arc surface of the furnace mouth of the medium-frequency melting furnace 1. The height of the lower hood 5 is 130mm. A dust suction port 6 is provided on the lower hood 5. The dust suction port 6 is a long, flat hole with a width of 30mm. This ensures that the dust suction capacity of the lower hood 5 is consistent around its circumference.

[0034] Four fixing frames 8 are provided on the outer periphery of the cover 1. The fixing frames 8 are used to fix the medium frequency melting furnace 1. The fixing frames 8 are spaced at an angle of 70°.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and basic spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust extraction and protection device for the inlet of a medium-frequency induction melting furnace, comprising a cover disposed above the inlet of the medium-frequency induction melting furnace, wherein a dust discharge port is provided on one side of the cover, characterized in that, The hood has an upper hood opening and a lower hood opening in the middle. The upper hood opening is conical, and the lower hood opening has the same size at the top and bottom and is set along the arc surface of the induction furnace opening. The lower hood opening is equipped with a dust suction port. Multiple reinforcing ribs are distributed around the circumference of the lower hood opening inside the hood.

2. The dust extraction and protection device for the inlet of a medium-frequency melting furnace according to claim 1, characterized in that, The angle between the conical surface of the upper cover and the horizontal direction is 18°-22°.

3. The dust extraction and protection device for the inlet of a medium-frequency melting furnace according to claim 1, characterized in that, The height of the lower cover opening is 120-150mm.

4. The dust extraction and protection device for the inlet of a medium-frequency melting furnace according to claim 1, characterized in that, The suction port is a long, flat hole with a width of 30-40mm.

5. The dust extraction and protection device for the inlet of a medium-frequency melting furnace according to claim 1, characterized in that, The reinforcing ribs are spaced at the same angle, and the top surface of the reinforcing ribs has the same taper as the upper cover opening, and they are tightly connected to its inner wall.

6. The dust extraction and protection device for the inlet of a medium-frequency melting furnace according to claim 1, characterized in that, The outer periphery of the cover is provided with multiple fixing frames, which are used to fix and connect to the medium frequency melting furnace. The fixing frames are spaced at the same angle.

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