Dust hood device for casting in continuous casting process
By adding additional air ducts and multiple suction ports to the dust collecting cover device of the continuous casting process, the problem of difficulty in absorbing flue gas in the middle casting area is solved, and more efficient flue gas absorption and reducing flue gas spillover is achieved.
Patent Information
- Application Number
- CN202420235262.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-30
AI Technical Summary
The existing large-bag dust removal cover has poor dust removal effect in the continuous casting process, mainly because the flue gas in the middle bag casting area is difficult to effectively absorb, resulting in flue gas overflow.
A dust collector device for casting in continuous casting process is designed, including a dust collector air duct and a dust collector. The additional air duct is located inside the dust collector and extends to the middle casting area, and a plurality of suction ports are provided at the bottom of the suction port to suction. The air outlet is arranged around the circumference of the casting machine to shorten the distance between the air suction outlet and the smoke generation point and improve smoke absorption.
It effectively improves the smoke exhaust effect, reduces the overflow of smoke, and improves the absorption efficiency of smoke by adding air suction ports, ensuring better dust removal performance under the same dust removal air volume.
Smart Images
Figure CN222344210U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of iron and steel metallurgy, in particular to a dust removal cover device used for casting in a continuous casting process. Background Art
[0002] According to the Opinions on Promoting the Implementation of Ultra-low Emissions in the Steel Industry (Environmental Atmosphere
[2019] No. 35) and the Technical Guidance on the Formulation of Emergency Emission Reduction Measures for Key Industries in Severe Pollution Weather (2020 Revised Edition), differentiated emission reduction measures for key industries are fully implemented, and key industry enterprises are required to carry out performance grading, and classified measures are implemented for industrial enterprises with different governance levels and emission intensities. Enterprises rated as A must achieve ultra-low emissions throughout the entire process.
[0003] There is obvious smoke in the ladle casting area of the continuous casting process, which needs to be discharged through dust hoods to achieve ultra-low emission requirements. Therefore, newly built continuous casting machines are basically equipped with large-bag dust hoods, and more and more old continuous casting machine plants have also added large-bag dust hoods.
[0004] When the continuous casting machine is in production, the dust hood truck is driven above the ladle and connected to the dust removal device pipeline in the workshop (with an electric valve). It is in the flue gas capture state and the generated smoke is sucked into the dust removal system. The smoke does not overflow, thus achieving the purpose of clean production.
[0005] In conventional large-bale dust hoods, the workshop dust removal duct is connected to the dust hood body, and an air suction port is formed on the side or top of the hood body to absorb smoke and dust. However, the smoke in the continuous casting process mainly comes from the casting of the middle ladle, which is caused by the combustion of the covering agent (the combustion of the large-bale covering agent also produces smoke, but the large-bale covering device can better seal the large bales, and there is basically no smoke overflow from the large bales). Since the distance between the middle bale and the dust hood suction port is relatively large, usually up to 10 meters or more, the dust removal effect of the large-bale dust hood is poor, and only the smoke that automatically floats to the vicinity of the suction port can be drawn away. Utility Model Content
[0006] In view of the above-mentioned defects in the prior art, a dust removal hood device for continuous casting process is provided to improve the smoke exhaust effect and reduce delayed overflow.
[0007] The technical solution adopted by the utility model to solve the above technical problems is:
[0008] A dust removal hood device for continuous casting process includes a dust removal duct and a dust removal hood, wherein the dust removal duct is connected to the dust removal hood; the device is characterized in that: the device includes an additional duct, the additional duct is located inside the dust removal hood, the top of the additional duct is connected to the dust removal duct, and the additional duct extends to the tundish casting area; a plurality of air suction ports are provided at the bottom end of the additional duct, and the air suction ports surround the casting machine.
[0009] According to the above technical scheme, at least 5 to 6 air suction ports are set, one air suction port is set on each side of the left and right sides of the tundish casting position, one air suction port is set close to the outer arc side of the casting machine, and 2 to 3 air suction ports are set on the inner arc side of the casting machine according to the width of the dust hood body.
[0010] According to the above technical solution, when the width of the dust hood body is ≤8m, two air inlets are required, otherwise three are required.
[0011] According to the above technical solution, the air suction ports are all arranged inside the dust cover body.
[0012] According to the above technical solution, the air suction ports on the left and right sides of the tundish casting position are close to the side baffles of the cover body and are consistent in height with the bottom of the side baffles. The length of the air suction ports is 300mm to 500mm and the width is 300mm to 500mm.
[0013] According to the above technical solution, the air suction port on the outer arc side of the casting machine is close to the top of the impact zone of the middle bag, and the length of the air suction port is 300mm~500mm and the width is 300mm~500mm.
[0014] According to the above technical scheme, the air suction port on the inner arc side of the casting machine is introduced into the area 1.5m to 2.5m above the ladle operating platform; the air outlet is close to the top of the tundish molten pool, and it must be ensured that it does not affect the rotation of the ladle. The length of the air suction port is 800mm to 1200mm, and the width is 800mm to 1200mm.
[0015] According to the above technical solution, all air suction ports are trumpet-shaped or oblique-shaped.
[0016] According to the above technical solution, the dust hood and the dust removal duct are fixed on the dust hood vehicle, and the dust hood is moved to the area to be dusted according to needs; the additional duct is welded to the structural beam of the dust hood body; the additional duct and the dust removal duct interface are connected, and the interface size remains consistent.
[0017] According to the above technical solution, the additional air duct is made of 5mm to 8mm steel plate.
[0018] The utility model has the following beneficial effects:
[0019] By adding an additional air duct and setting multiple air suction ports at the bottom of the additional air duct, the distance from the air suction port to the smoke generation point is greatly shortened by using the additional air duct, which can effectively improve the smoke exhaust effect under the same dust removal air volume conditions; in addition, since the air suction ports are arranged around the side of the middle bag, the air suction ports can improve the absorption of smoke generated on both sides of the middle bag and reduce smoke overflow. The air suction ports on the dust removal hood are retained to absorb the dust not sucked out by the air suction ports on the additional air duct and the dust generated by the large bag. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1It is the main view of the existing dust hood;
[0021] Figure 2 is a side view of an existing dust hood;
[0022] Figure 3 It is a top view of the existing dust hood;
[0023] Figure 4 It is a front view of an embodiment provided by the utility model;
[0024] Figure 5 It is a side view of an embodiment provided by the utility model;
[0025] Figure 6 It is a top view of an embodiment provided by the utility model;
[0026] Figure 7 This is a schematic diagram of the structure in which an additional air duct is installed on a dust removal hood according to an embodiment of the utility model;
[0027] Figure 8 This is a schematic diagram of the structure of the additional air duct provided in the embodiment of the utility model;
[0028] In the figure, 1. dust removal duct; 2. dust removal hood; 3. additional air duct; 4. air intake port. DETAILED DESCRIPTION
[0029] The utility model is described in detail below with reference to the accompanying drawings and embodiments.
[0030] Reference Figures 1 to 8 As shown, the utility model provides a dust removal cover device for continuous casting process.
[0031] Example 1
[0032] The invention comprises a dust removal air duct 1 and a dust removal cover 2, wherein the dust removal air duct is connected to the dust removal cover. The invention also comprises an additional air duct 3, wherein the additional air duct is located inside the dust removal cover, the top of the additional air duct is connected to the dust removal air duct, and the additional air duct extends to the tundish casting area; a plurality of air suction ports 4 are arranged at the bottom end of the additional air duct, and the air suction ports surround the casting machine.
[0033] In this embodiment, by adding an additional air duct and setting a plurality of air suction ports at the bottom of the additional air duct, the distance from the air suction port to the smoke generation point is greatly shortened by using the additional air duct, and the smoke exhaust effect can be effectively improved under the same dust removal air volume condition; in addition, since the air suction ports are arranged around the periphery of the middle bag, the air suction ports can improve the absorption of smoke generated on both sides of the middle bag and reduce smoke overflow. The air suction ports on the dust removal hood are retained to absorb the dust not sucked out by the air suction ports on the additional air duct and the dust generated by the large bag.
[0034] Example 2
[0035] The structure and principle of Example 2 are similar to those of Example 1, except that at least 5 to 6 suction ports are provided, with one suction port each being provided on the left and right sides of the tundish casting position, one suction port being provided close to the outer arc side of the casting machine, and 2 to 3 suction ports being provided on the inner arc side of the casting machine according to the width of the dust hood body.
[0036] Among them, when the width of the dust hood body is ≤8m, two suction ports are required, otherwise three are required.
[0037] Preferably, the air suction ports are all arranged inside the dust cover body.
[0038] Example 3
[0039] The structure and principle of Example 3 are similar to those of Example 2, except that the specific arrangement positions and sizes of the air inlets are given.
[0040] The air suction ports on the left and right sides of the tundish casting position are close to the side baffles of the cover body and are consistent in height with the bottom of the side baffles. The length of the air suction ports is 300mm to 500mm and the width is 300mm to 500mm.
[0041] The air suction port on the outer arc side of the casting machine is close to the top of the impact zone of the middle bag, and the length of the air suction port is 300mm~500mm and the width is 300mm~500mm.
[0042] The air suction port on the inner arc side of the casting machine is introduced into an area 1.5m to 2.5m above the ladle operating platform (in the embodiment in the figure, it is introduced to 2m, and the specific height is determined according to the needs, and it must be ensured that it does not affect the operation of the ladle); the air outlet is close to the top of the tundish molten pool, and it must be ensured that it does not affect the rotation of the ladle. It mainly absorbs the smoke floating from the tundish. As the main smoke exhaust point, the air suction port is 800mm to 1200mm long and 800mm to 1200mm wide.
[0043] In embodiments 1-3, preferably, all air suction ports are trumpet-shaped or oblique-shaped to increase the cross-sectional area of the air suction ports and enhance the air suction effect.
[0044] In Examples 1-3, preferably, the dust hood and the dust removal duct are fixed on the dust hood vehicle, and the dust hood is moved to the area to be dusted as needed; the additional duct is welded to the structural beam of the dust hood body and can be driven to the casting position or baking position together with the dust hood vehicle; the additional duct is interfaced with the dust removal duct, and the interface size remains consistent.
[0045] In embodiments 1-3, preferably, the air duct is made of a steel plate with a thickness of 5 mm to 8 mm.
[0046] The above are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of patent application of the present invention still fall within the protection scope of the present invention.
Claims
1. A dust removal hood device for continuous casting process, comprising a dust removal duct and a dust removal hood, wherein the dust removal duct is connected to the dust removal hood; the characteristics are: It includes an additional air duct, which is located inside the dust removal hood, the top of which is connected to the dust removal air duct, and the additional air duct extends to the tundish casting area; a plurality of air suction ports are arranged at the bottom end of the additional air duct, and the air suction ports surround the casting machine.
2. The dust removal cover device for continuous casting process according to claim 1, characterized in that: At least 5 to 6 air suction ports are provided, one on each side of the tundish casting position, one near the outer arc side of the casting machine, and 2 to 3 on the inner arc side of the casting machine according to the width of the dust hood body.
3. The dust removal cover device for continuous casting according to claim 2, characterized in that: When the width of the dust hood is ≤8m, two air inlets are required, otherwise three are required.
4. The dust removal cover device for continuous casting process according to claim 2, characterized in that: The air suction ports are all arranged inside the dust cover body.
5. The dust removal cover device for continuous casting according to any one of claims 2 to 4, characterized in that: The air suction ports on the left and right sides of the tundish casting position are close to the side baffles of the cover body and are consistent in height with the bottom of the side baffles. The length of the air suction ports is 300mm to 500mm and the width is 300mm to 500mm.
6. The dust removal cover device for continuous casting according to any one of claims 2 to 4, characterized in that: The air suction port on the outer arc side of the casting machine is close to the top of the impact zone of the middle bag, and the length of the air suction port is 300mm~500mm and the width is 300mm~500mm.
7. The dust removal cover device for continuous casting according to any one of claims 2 to 4, characterized in that: The air suction port on the inner arc side of the casting machine is introduced into the area 1.5m to 2.5m above the ladle operating platform; the air outlet is close to the top of the tundish molten pool, and it must be ensured that it does not affect the rotation of the ladle. The length of the air suction port is 800mm to 1200mm, and the width is 800mm to 1200mm.
8. The dust removal cover device for continuous casting process according to claim 1, characterized in that: All air inlets are trumpet-shaped or oblique-shaped.
9. The dust removal cover device for continuous casting process according to claim 1, characterized in that: The dust hood and the dust duct are fixed on the dust hood vehicle, and the dust hood is moved to the area to be dusted according to needs; the additional duct is welded to the structural beam of the dust hood body; the additional duct is connected to the dust duct interface, and the interface size remains consistent.
10. The dust removal cover device for continuous casting process according to claim 1, characterized in that: The additional air duct is made of 5mm to 8mm steel plate.