Dust-free ash discharging device for electric arc furnace
By introducing a bag structure with a support ring and a bent groove into the electric arc furnace ash unloading device, combined with a clamp and a material guide cover, the problems of bag clogging and secondary dust generation during the efficient steelmaking process are solved, and smooth ash discharge and dust-free ash unloading are achieved.
Patent Information
- Application Number
- CN202422795203.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-17
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-17
AI Technical Summary
The existing electric arc furnace ash unloading device is prone to bag clogging due to increased ash volume during the efficient steelmaking process, resulting in poor ash discharge. In addition, the traditional humidifier is not effective and cannot effectively prevent secondary dust.
A bag structure including a support ring and a bending groove is designed, combined with a clamp and a material guide cover to achieve automatic adjustment and folding of the bag length, prevent the bag from blocking the ash discharge channel, and disperse the ash through the material guide cover to ensure smooth ash discharge.
It effectively avoids bag clogging, ensures the smooth flow of ash discharge channels, reduces secondary dust, and improves ash unloading efficiency and the disassembly and assembly of the device.
Smart Images
Figure CN223316717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric arc furnace ash unloading, in particular to a dust-free ash unloading device for an electric arc furnace. Background Art
[0002] With the continuous increase in the proportion of domestic electric arc furnace steelmaking capacity, electric arc furnace steelmaking technology has made great progress. The capacity of high-efficiency electric arc furnaces has continued to increase, from 80 tons to 150 tons. Currently, the electric arc furnaces in operation or under construction are generally 100 tons or more. The high-intensity smelting has led to an explosive increase in electric arc furnace smoke and dust, and the frequency of dust removal and ash unloading has increased from once a day to three times a day or even more.
[0003] The unorganized emission of dust generated in the process of material transportation and transshipment will affect the air quality. The centralized ash bin of the dust collector of the electric arc furnace in the steel plant currently uses the traditional method of transporting ash outside the car to unload the ash, which easily leads to secondary dust pollution. The traditional design of unloading ash considers the use of humidifiers to solve the problem of secondary dust. The principle of the humidifier is to use water to humidify the dust to prevent dust from rising. However, the humidifier is often blocked and cannot operate normally due to uneven humidification of water and low ambient temperature. The effect is not ideal. The related technology uses cylindrical cloth bags to guide the ash to achieve dust-free unloading.
[0004] The existing dust-free dust removal structure is relatively common. For details, please refer to Figure 1 ,like Figure 1 As shown, the ash unloading device includes a long cloth bag and locking fasteners and a material guide cover fixed at both ends of the cloth bag. However, during the process of guiding the ash into the ash hopper, the amount of ash gradually increases, and the cloth bag is easily pressed or lifted up and wrinkled. The wrinkles cause the amount to decrease, reduce the material guiding speed, and even cause blockage.
[0005] Therefore, it is necessary to provide a dust-free ash unloading device for an electric arc furnace that can automatically adjust the length. Utility Model Content
[0006] The utility model provides a dust-free ash unloading device for an electric arc furnace to solve the above technical problems.
[0007] In order to achieve the above-mentioned purpose, an embodiment of the present utility model provides a dust-free dust removal device for an electric arc furnace, comprising: a cloth bag, a clamp installed on the top of the cloth bag, and a material guide cover installed on the bottom of the cloth bag, the cloth bag includes a plurality of support rings, and an adjustment section is formed between adjacent support rings, the adjustment section has an outer surface and an inner surface corresponding to the outer surface, a bending groove is provided at the center position of the inner surface, the bending groove is annular, and the cross-section of the bending groove is a transverse "V" shape.
[0008] Furthermore, the support ring is a steel ring with a circular cross-section.
[0009] Furthermore, a receiving groove is provided on the bottom surface of the steel ring. When two adjacent steel rings abut against each other, the top surface of the lower steel ring abuts against the receiving groove of the upper steel ring.
[0010] Furthermore, the inner wall of the clamp is connected to a compression pad, and the compression pad is made of rubber.
[0011] Furthermore, the thickness of the compression pad is smaller than the thickness of the clamp, the top surface of the compression pad is flush with the top surface of the clamp, and an accommodating cavity is formed between the bottom of the compression pad and the inner wall of the clamp.
[0012] Furthermore, a blocking bar is provided on the bottom edge of the inner portion of the clamp, and the blocking bar is made of elastic material.
[0013] Furthermore, the material guiding cover includes a connecting portion, a guiding portion and a supporting portion from top to bottom, and the connecting portion is installed on the bottom edge of the cloth bag.
[0014] Furthermore, the inner diameter of the guide portion gradually increases from top to bottom.
[0015] Furthermore, the bottom surface of the supporting portion is an arc-shaped convex surface.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. By setting the support ring and bending groove, the bag can be shortened as the amount of ash increases, and the bag can be prevented from blocking the ash discharge channel, thereby solving the problem of poor ash discharge.
[0018] 2. By setting up the accommodating cavity, the cloth bag which is not in the ash discharge state can be folded, thereby avoiding the bag from swinging when not in the ash discharge state and facilitating disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 It is a structural schematic diagram of an ash unloading device in the prior art;
[0021] Figure 2 This is a three-dimensional cross-sectional view of the preferred embodiment of the dust-free ash removal device for an electric arc furnace of the present invention;
[0022] Figure 3 This is a schematic structural diagram of the adjustment section of the utility model;
[0023] Figure 4 A three-dimensional diagram of the preferred embodiment of the clamp of the present utility model;
[0024] Figure 5 A perspective view of the preferred embodiment of the material guide cover of the present invention;
[0025] Figure 6 It is a three-dimensional cross-sectional view of the optimal embodiment of the material guide cover of the present utility model.
[0026] Among them, 1. cloth bag; 11. support ring; 12. adjustment section; 13. bending groove; 14. outer surface; 15. inner surface; 16. receiving groove; 2. clamp; 21. pressure pad; 22. receiving cavity; 23. resistance strip; 3. material guide cover; 31. connecting part; 32. guide part; 33. lifting part; 34. outer convex surface. DETAILED DESCRIPTION
[0027] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.
[0028] See also Figure 2 Combined with Figure 3 , Figure 2 This is a three-dimensional cross-sectional view of the preferred embodiment of the dust-free ash removal device for an electric arc furnace of the present invention; Figure 3 This is a schematic diagram of the structure of the adjustment section of the utility model. Figures 2 to 3 As shown, at least one embodiment provides a dust-free ash removal device for an electric arc furnace, comprising: a cloth bag 1, a clamp 2 installed on the top of the cloth bag 1, and a material guide cover 3 installed on the bottom of the cloth bag 1.
[0029] 1. Cloth bag 1
[0030] Please continue reading Figure 3 ,like Figure 3 As shown, the length of the bag 1 is determined by the distance between the ash truck and the ash discharge port of the electric arc furnace. Specifically, the bag 1 includes multiple support rings 11, each of which is a circular steel ring. A receiving groove 16 is defined on the bottom surface of each steel ring. When two adjacent steel rings abut against each other, the top surface of the lower steel ring abuts against the receiving groove 16 of the upper steel ring. An adjustment section 12 is formed between adjacent support rings 11. The adjustment section 12 has an outer surface 14 and an inner surface 15 corresponding to the outer surface 14. A bending groove 13 is defined at the center of the inner surface 15. The bending groove 13 is annular and has a transverse "V"-shaped cross-section. This bending groove 13 allows the middle portion of the adjustment section 12 to continuously bend toward the outer surface 14 as the ash rises until the inner surface 51 folds, and the outer surface 14 of the upper section begins to slowly bend. This outward bending prevents the bag 1 from blocking the ash discharge channel, thereby resolving the problem of poor ash discharge.
[0031] 2. Clamp 2
[0032] Please continue reading Figure 2 and combined Figure 4 , Figure 4 This is a three-dimensional diagram of the best embodiment of the clamp of the utility model. Figure 2 and Figure 4 As shown, the clamp 2 is used to connect the cloth bag 1 and the ash discharge port of the electric arc furnace. Specifically, the inner wall of the clamp 2 is connected with a compression pad 21, which is made of rubber. The compression pad 21 is not only used to enhance the strength of the locking cloth bag 1, but also allows the inner wall of the clamp 2 to be at a certain distance from the surface of the cloth bag 1, that is. The thickness of the compression pad 21 is less than the thickness of the clamp 2. The top surface of the compression pad 21 is flush with the top surface of the clamp 2. A receiving chamber 22 is formed between the bottom of the compression pad 21 and the inner wall of the clamp 2. The formed receiving chamber 22 can accommodate the folded cloth bag 1 inside it, so that the folded cloth bag 1 does not swing when it is not discharging ash, and is also convenient for disassembly and assembly. In addition, in order to prevent the cloth bag from falling out after being stored, a blocking bar 23 is provided on the bottom edge of the clamp 2. The blocking bar 23 is made of elastic material. The blocking bar 23 makes the entrance of the receiving chamber 2 smaller in diameter, so that the cloth bag 1 is not easy to fall out after being folded.
[0033] 3. Guide cover 3
[0034] Please continue reading Figure 2 and combined Figure 5 and Figure 6 , Figure 5 A perspective view of the preferred embodiment of the material guide cover of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the optimal embodiment of the material guide cover of the utility model. Figure 2 、 Figure 5 and Figure 6 As shown, the material guide cover 3 not only allows the ash to flow into the bucket as soon as it enters it, but also allows the cloth bag 1 to be continuously folded according to the continuous increase of ash. Specifically, the material guide cover 3 includes, from top to bottom, a connecting portion 31, a guide portion 32, and a supporting portion 33. The connecting portion 31 is installed on the bottom edge of the cloth bag 1. The inner diameter of the guide portion 32 gradually increases from top to bottom. The bottom surface of the supporting portion 33 is an arc-shaped outer convex surface 34. The outer convex surface 34 is the arc-shaped surface that contacts the ash in the ash-pulling bucket. The ash is discharged from the arc-shaped surface, passes through the material guide cover 3 along the curvature of the arc-shaped surface, and is dispersed to the outside thereof. The material guide cover 3 is continuously lifted up as a whole according to the continuous increase of the ash amount, so that the bending grooves 13 on the adjustment section 21 overlap in sequence from bottom to top.
[0035] In summary, by providing the support ring 11 and the bending groove 13, the cloth bag 1 can be made shorter as the amount of ash increases, and the cloth bag 1 can be prevented from blocking the ash discharge channel, thereby solving the problem of poor ash discharge; by providing the accommodating cavity 22, the cloth bag 1 that is not in the ash discharge state can be folded, thereby avoiding the cloth bag 1 from swinging when not discharging ash, and is also convenient for disassembly and assembly.
[0036] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.
Claims
1. A dust-free ash removal device for an electric arc furnace, characterized in that: include: A cloth bag (1), a clamp (2) installed on the top of the cloth bag (1), and a material guide cover (3) installed on the bottom of the cloth bag (1); the cloth bag (1) includes a plurality of support rings (11), an adjustment section (12) is formed between adjacent support rings (11), the adjustment section (12) has an outer surface (14) and an inner surface (15) corresponding to the outer surface (14), a bending groove (13) is provided at the center of the inner surface (15), the bending groove (13) is annular, and the cross section of the bending groove (13) is a transverse "V" shape.
2. The dust-free ash removal device for an electric arc furnace according to claim 1, characterized in that: The support ring (11) is a steel ring with a circular cross section.
3. The dust-free ash removal device for an electric arc furnace according to claim 2, characterized in that: The bottom surface of the steel ring is provided with a receiving groove (16), and when two adjacent steel rings abut against each other, the top surface of the lower steel ring abuts against the receiving groove (16) of the upper steel ring.
4. The dust-free ash removal device for an electric arc furnace according to claim 3, characterized in that: The inner wall of the clamp (2) is connected to a compression pad (21), and the compression pad (21) is made of rubber.
5. The dust-free ash removal device for an electric arc furnace according to claim 4, characterized in that: The thickness of the compression pad (21) is smaller than the thickness of the clamp (2), the top surface of the compression pad (21) is flush with the top surface of the clamp (2), and an accommodating cavity (22) is formed between the bottom of the compression pad (21) and the inner wall of the clamp (2).
6. The dust-free ash removal device for an electric arc furnace according to claim 5, characterized in that: A blocking strip (23) is provided on the bottom edge of the inner portion of the clamp (2), and the blocking strip (23) is made of elastic material.
7. The dust-free ash removal device for an electric arc furnace according to claim 6, characterized in that: The material guide cover (3) comprises, from top to bottom, a connecting portion (31), a guiding portion (32) and a supporting portion (33), wherein the connecting portion (31) is mounted on the bottom edge of the cloth bag (1).
8. The dust-free ash removal device for an electric arc furnace according to claim 7, characterized in that: The inner diameter of the guide portion (32) gradually increases from top to bottom.
9. The dust-free ash removal device for an electric arc furnace according to claim 8, characterized in that: The bottom surface of the supporting portion (33) is an arc-shaped outer convex surface (34).