A dust removal system for continuous casting area

Abstract

The present invention belongs to the field of metallurgical continuous casting, and relates to a continuous casting area dust removal system, comprising a tundish car, a crystallizer, a crystallizer cover plate, and a tundish arranged on the tundish car, wherein the tundish is provided with a tundish cover with a smoke and dust collection function, the tundish cover is a hollow structure, a refractory material is arranged at the bottom, the inner cavity is a smoke and dust circulation channel, one end of the tundish cover is provided with a trapezoidal connecting pipe on the tundish that is trapezoidally connected to the dust removal pipeline of the tundish car, and the tundish car is also provided with a smoke and dust collection device acting on the top of the crystallizer cover plate, and the smoke and dust collection device is connected to the dust removal pipeline of the tundish. The present invention hinders smoke and dust diffusion, improves smoke and dust collection rate, and improves the operating environment by arranging a collection device at the smoke and dust generation source position. Compared with the traditional roof cover and the mobile dust removal cover above the casting position, the motor power is greatly reduced, thereby reducing the one-time investment and operating costs.

Description

Technical Field

[0001] The invention belongs to the field of metallurgical continuous casting and relates to a dust removal system in a continuous casting area. Background Art

[0002] In the metallurgical industry, smoke will be generated when the covering agent of the continuous casting intermediate tank contacts the molten steel, and the crystallizer protective slag will also generate smoke during the crystallizer combustion process. When the continuous casting molten steel tank is capped with a capping machine or without a capping device, a small amount of smoke will be generated, but at present, many steel mills have gradually changed to capping the molten steel tank throughout the process, so there is no smoke generated on the upper part of the molten steel tank. During the casting process, under special circumstances, the sliding nozzle at the bottom of the molten steel tank will not open. At this time, oxygen is needed to clean the nozzle, which will generate smoke, but the smoke will diffuse because it is at the bottom of the molten steel tank.

[0003] In the prior art, the dust removal device in the casting area of ​​the continuous casting machine is mainly divided into two parts. One part is the dust removal in the intermediate tank area. The method mainly adopts a fixed dust hood on the roof of the factory building or a mobile dust hood above the molten steel tank. The fixed dust hood is far away from the smoke generation area. The distance from the smoke generation to the collection position is more than 20m. Even if a larger dust removal fan and a larger dust removal hood are used, the effect is very poor. Therefore, at present, the continuous casting workshop mostly adopts the mobile dust removal hood method. Considering that the molten steel tank turntable is rotating continuously, the mobile dust removal hood is usually arranged at a distance of about 8m from the smoke generation area of ​​the intermediate tank, resulting in the smoke generation to the collection being in a state of release, and the effect of the dust suction port is poor. Although a larger dust removal fan, dust removal hood, dust removal pipeline and other dust removal measures are adopted, even if a fan with a 200,000 air volume is used, the dust removal effect is very limited, resulting in a poor working environment. The investment and operating costs are large, resulting in a waste of most of the energy. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a dust removal system for the continuous casting area, which addresses the shortcomings of existing design methods and the need for energy saving and consumption reduction, while purifying the smoke and dust and improving the working environment of the workers.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a continuous casting area dust removal system, comprising a coordinated intermediate tank car, a crystallizer, a crystallizer cover plate, and an intermediate tank arranged on the intermediate tank car, the intermediate tank is provided with an intermediate tank cover with a smoke and dust collection function, the intermediate tank cover is a hollow structure, the bottom of which is provided with refractory material, the inner cavity is a smoke and dust circulation channel, one end of the intermediate tank cover is provided with a trapezoidal connecting pipe on the intermediate tank that is trapezoidally connected to the dust removal pipeline of the intermediate tank car, the intermediate tank car is also provided with a smoke and dust collection device acting on the top of the crystallizer cover plate, and the smoke and dust collection device is connected to the dust removal pipeline of the intermediate tank car.

[0006] Optionally, the dust removal pipeline of the intermediate tank truck includes a trapezoidal connecting pipe on the intermediate tank truck, a dust removal pipe on the intermediate tank truck, a telescopic dust removal pipe and a first dust removal pipe joint, and the smoke collection device includes a bell-mouth smoke collection device, a fixed dust removal pipe and a second dust collection pipe joint connected in sequence; the first dust removal pipe joint and the second dust removal pipe joint are respectively connected to a dust removal main pipe.

[0007] Optionally, an air valve is provided in the dust removal main pipe.

[0008] Optionally, the width direction of the bell-mouth smoke dust collecting device is consistent with the width of the crystallizer, and the thickness direction is smaller than the distance between the bottom of the intermediate tank and the crystallizer cover plate, and does not affect the movement of the intermediate tank car; the number of bell-mouth smoke dust collecting devices matches the number of streams of the continuous casting machine.

[0009] Optionally, the first dust removal pipe joint and the second dust removal pipe joint adopt a joint with a telescopic joint type.

[0010] Optionally, the dust removal main pipe is connected to a dust removal fan system to complete the purification of smoke and dust.

[0011] Optionally, the trapezoidal connecting pipe on the intermediate tank truck and the trapezoidal connecting pipe on the intermediate tank are connected in a trapezoidal shape, with the trapezoid being larger at the top and smaller at the bottom, to ensure that the intermediate tank can be quickly guided into place during lifting. The length of the trapezoid is at least twice the centering stroke of the intermediate tank to ensure that the dust removal pipe connection is closed.

[0012] Optionally, a cover with movable leaves is provided on the upper part of the trapezoidal connecting pipe on the intermediate tank truck, and the length and width of the cover cover the operating range of the trapezoidal connecting pipe on the intermediate tank, and the size of the trapezoidal connecting pipe on the intermediate tank is smaller than the trapezoidal connecting pipe on the intermediate tank truck.

[0013] Optionally, the telescopic dust removal pipe is connected by an upper and lower pipe section. The length of the connection part should be greater than the lifting stroke of the intermediate tank truck to ensure that the dust removal pipe connection is closed. The upper and lower pipe sections are connected with a smaller upper section and a larger lower section. The lower pipe runs inside the upper pipe during the lifting process of the intermediate tank truck.

[0014] Optionally, the intermediate tank cover is provided with through-going preheating and long water inlet openings, preheating holes, temperature measuring holes and stopper rod holes, a pipe connected to the intermediate tank is arranged in the through-going hole, and an air suction port is opened on the outer wall of the pipe.

[0015] The beneficial effects of the present invention are as follows: the present invention can capture the smoke generated by the covering agent of the crystallizer continuous casting intermediate tank and the smoke generated by the combustion of the crystallizer protective slag by setting the intermediate tank cover with smoke collection function and purify the smoke after collection; the dust collection port and the smoke generation area are no more than 500mm, the dust removal effect is good, energy consumption is saved, and the working environment is greatly improved; at the same time, when the intermediate tank car moves to the casting position, the dust removal pipe on the intermediate tank car is automatically connected to the dust removal main pipe, and the dust removal pipeline setting area is located below the operating platform and inside the intermediate tank cover, leaving sufficient operating space, so that centralized dust removal in the casting area of ​​the continuous casting machine can be realized.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 It is a schematic elevation diagram of a dust removal system for a continuous casting area of ​​the present invention;

[0019] Figure 2 It is a schematic plan view of a dust removal system for a continuous casting area of ​​the present invention;

[0020] Figure 3 A schematic diagram of a tundish cover of a continuous casting area dust removal system according to the present invention;

[0021] Figure 4 This is a schematic diagram of the trapezoidal connection of a dust removal system in a continuous casting area of ​​the present invention.

[0022] Figure numerals: intermediate tank car 1, intermediate tank 2, intermediate tank cover 3, trapezoidal connecting pipe on intermediate tank 4, trapezoidal connecting pipe on intermediate tank car 5, dust removal pipe on intermediate tank car 6, telescopic dust removal pipe 7, fixed dust removal pipe 8, bell-mouth smoke dust collection device 9, first dust removal pipe joint 10, air valve 11, dust removal main pipe 12, crystallizer 13, crystallizer cover plate 14, molten steel tank 15, movable leaf 16, preheating and long water nozzle opening 17, preheating hole 18, temperature measuring hole 19, stopper rod hole 20, cover plate 21, handle 22, second dust removal pipe joint 23. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0024] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] See also Figure 1 to Figure 4, is a dust removal system for continuous casting casting area, which captures the smoke generated by the continuous casting intermediate tank covering agent, the smoke generated by the water burning nozzle and the smoke generated by the combustion of the crystallizer protection slag, including the intermediate tank car 1, the crystallizer 13, the crystallizer cover plate 14, the molten steel tank 15, and the intermediate tank 2 arranged on the intermediate tank car 1, the intermediate tank 2 is provided with an intermediate tank cover 3 with a smoke collection function, the intermediate tank cover 3 is a hollow structure, the bottom of which is provided with refractory materials, the inner cavity is a smoke flow channel, one end of the intermediate tank cover 3 is provided with an intermediate tank upper trapezoidal connecting pipe 4 which is trapezoidally connected to the dust removal pipeline of the intermediate tank car 1, and the intermediate tank car 1 is also provided with a The smoke collecting device is connected with the dust removal pipeline of the intermediate tank car 1. The dust removal pipeline of the intermediate tank car 1 includes a trapezoidal connecting pipe 5 on the intermediate tank car, a dust removal pipe 6 on the intermediate tank car, a telescopic dust removal pipe 7 and a first dust removal pipe joint 10. The smoke collecting device includes a bell-shaped smoke collecting device 9, a fixed dust removal pipe 8 and a second dust removal pipe joint 23 connected in sequence; the first dust removal pipe joint 10 and the second dust removal pipe joint 23 are respectively connected with a dust removal main pipe 12. The dust removal pipe 6 on the intermediate tank car is a rectangular air duct, which is arranged under the maintenance walkway on the intermediate tank car 1 to ensure that the rectangular air duct does not affect the operation. The dust removal main pipe 12 is connected to a dust removal fan system to complete the purification of smoke.

[0027] In this embodiment, an air valve 11 is provided in the dust removal main pipe 12, and air valves may also be provided on each branch of the dust removal branch pipe to adjust the air volume of each branch pipe to avoid excessive air volume at the air outlet to inhale protective slag and covering agent.

[0028] In this embodiment, the width direction of the bell-mouth smoke collecting device 9 is consistent with the width of the crystallizer 13, and the thickness direction is smaller than the distance between the bottom of the intermediate tank 2 and the crystallizer cover plate 14. The preferred thickness direction is controlled at 80 mm, which does not affect the movement of the intermediate tank car 1. The bell-mouth smoke collecting device 9 is arranged on the outer arc side, and the bottom of the bell mouth needs to maintain a certain distance from the crystallizer cover plate 14, which is controlled at 10 mm in this embodiment; the number of bell-mouth smoke collecting devices 9 matches the number of streams of the continuous casting machine, and two sets are provided in this embodiment.

[0029] In this embodiment, the first dust removal pipe joint 10 and the second dust removal pipe joint 23 are joints of the telescopic joint type.

[0030] In this embodiment, the trapezoidal connecting pipe 5 on the tundish is connected with the trapezoidal connecting pipe 4 on the tundish in a trapezoidal shape. The trapezoid is larger at the top and smaller at the bottom, ensuring that the tundish 2 can be quickly guided into place during the lifting process. The length of the trapezoid is at least twice the centering stroke of the tundish 2 to ensure that the dust removal pipeline is connected and closed. In this embodiment, the centering stroke L1 of the tundish 2 is ±50mm, and the length of the trapezoid on the trapezoidal connecting pipe 5 on the tundish is made according to twice the centering stroke L1 of the tundish 2. When the tundish 2 is centered in the inner and outer arc directions, the trapezoidal connecting pipe 4 on the tundish runs inside the trapezoidal connecting pipe of the tundish 1, and the dust removal pipeline is in a closed state.

[0031] In this embodiment, a cover plate 21 with a movable leaf 16 is arranged on the upper part of the trapezoidal connecting pipe 5 on the intermediate tank truck. The length and width of the cover plate 21 cover the operating range of the trapezoidal connecting pipe 4 on the intermediate tank. The size of the trapezoidal connecting pipe 4 on the intermediate tank is smaller than the trapezoidal connecting pipe 5 on the intermediate tank truck. During the lifting process of the intermediate tank 2, the handle 22 opens the cover plate 21, and after rotating 180 degrees, the lifting of the intermediate tank 2 is completed. During the placement of the intermediate tank 2 on the intermediate tank truck 1, the opening size of the trapezoidal connecting pipe 4 on the intermediate tank is slightly smaller than the trapezoidal connecting pipe 5 on the intermediate tank truck, generally controlled within 5 mm. The trapezoidal connection can play a guiding role in the placement process of the intermediate tank 2. After the placement is completed, the cover plate 21 is closed, so that the intermediate tank truck 1 is connected to the intermediate tank dust removal pipe.

[0032] In this embodiment, the telescopic dust removal pipe 7 is connected by two pipes, the length of the connection part should be greater than the lifting stroke of the tundish 1. In this embodiment, when the lifting stroke of the tundish 1 is 600mm, the length of the connection part should be greater than 600mm to ensure that the dust removal pipe is connected and closed. The upper and lower pipe diameters are connected with the upper small and the lower large. The lower pipe runs inside the upper pipe during the lifting process of the tundish 1. Steel plates can be set around the upper pipe for protection to prevent foreign objects from being inserted and play a safety protection role. The telescopic dust removal pipe 7 is set beside the track of the tundish 1 on the outer arc side, which does not affect the operation of the continuous casting machine.

[0033] In this embodiment, the intermediate tank cover 3 is provided with through preheating and long water inlet openings 17, preheating holes 18, temperature measuring holes 19 and stopper rod holes 20. A pipeline connected to the intermediate tank 2 is arranged in the through hole. An air suction port is arranged on the outer wall of the pipeline. A throttle plate can be arranged at the outlet of the air suction port according to actual conditions.

[0034] In this embodiment, a steel structure supporting steel plate may be further provided in the middle of the intermediate tank cover 3, but the circulation of internal smoke and dust shall not be hindered.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A continuous casting area dust removal system, comprising a tundish car, a crystallizer, a crystallizer cover plate, and a tundish arranged on the tundish car, characterized in that: The intermediate tank is provided with an intermediate tank cover with a smoke and dust collection function. The intermediate tank cover is a hollow structure, and a refractory material is provided at the bottom thereof. The inner cavity is a smoke and dust circulation channel. A trapezoidal connecting pipe on the intermediate tank that is trapezoidally connected to the dust removal pipeline of the intermediate tank car is provided at one end of the intermediate tank cover. The intermediate tank car is also provided with a smoke and dust collection device that acts on the top of the crystallizer cover plate, and the smoke and dust collection device is connected to the dust removal pipeline of the intermediate tank car; the dust removal pipeline of the intermediate tank car includes the trapezoidal connecting pipe on the intermediate tank car, the dust removal pipe on the intermediate tank car, the telescopic dust removal pipe and the first dust removal pipe joint, and the smoke and dust collection device includes a bell-mouth smoke and dust collection device, a fixed dust removal pipe and a second dust removal pipe joint that are connected in sequence; the first dust removal pipe joint and the second dust removal pipe joint are respectively It is connected with a dust removal main pipe; the width direction of the bell-mouth smoke collector is consistent with the width of the crystallizer, and the thickness direction is smaller than the distance between the bottom of the intermediate tank and the crystallizer cover plate, which does not affect the movement of the intermediate tank car; the number of bell-mouth smoke collectors matches the number of streams of the continuous casting machine; the trapezoidal connecting pipe on the intermediate tank car and the trapezoidal connecting pipe on the intermediate tank are connected in a trapezoidal shape, with the trapezoid being larger at the top and smaller at the bottom, to ensure that the intermediate tank can be quickly guided into place during lifting, and the length direction of the trapezoid is at least twice the centering stroke of the intermediate tank to ensure that the dust removal pipeline is connected and closed; a cover with movable leaves is arranged on the upper part of the trapezoidal connecting pipe on the intermediate tank car, and the length and width of the cover cover the operating range of the trapezoidal connecting pipe of the intermediate tank, and the size of the trapezoidal connecting pipe on the intermediate tank is smaller than that on the intermediate tank car.

2. A continuous casting area dust removal system according to claim 1, characterized in that: An air valve is provided in the dust removal main pipe.

3. A continuous casting area dust removal system according to claim 1, characterized in that: The first dust removal pipe joint and the second dust removal pipe joint adopt a joint with a telescopic joint type.

4. A continuous casting area dust removal system according to claim 1, characterized in that: The dust removal main pipe is connected to a dust removal fan system to complete the purification of smoke and dust.

5. The continuous casting area dust removal system according to claim 1, characterized in that: The telescopic dust removal pipe is connected by two sections of pipes, the length of the connection part should be greater than the lifting stroke of the intermediate tank car to ensure that the dust removal pipe connection is closed. The upper and lower sections of the pipe are connected with the upper smaller and the lower larger. The lower pipe runs inside the upper pipe during the lifting process of the intermediate tank car.

6. A continuous casting area dust removal system according to claim 1, characterized in that: The intermediate tank cover is provided with through preheating and long water inlet openings, preheating holes, temperature measuring holes and plug rod holes. A pipeline connected to the intermediate tank is arranged in the through hole, and an air suction port is opened on the outer wall of the pipeline.

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