Micro-fog dust suppression device applied to truck discharge point of ore storage bin of blast furnace
By setting up a micro-fog dust suppression device with multiple micro-fog spray heads at the discharge point of the mine warehouse truck, the problem of dust pollution during the discharge process is solved, and effective dust suppression effect and environmental improvement are achieved.
Patent Information
- Application Number
- CN202421559885.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the discharge process of the mine warehouse truck emission points, a large amount of dust is generated, resulting in environmental pollution and the impact of the work environment of the job, endangering the physical and mental health of workers.
A micro-fog dust suppression device is designed, including a plurality of first and second micro-fog spray heads, arranged around the ore chamber blanking port, and the sprayed water mist particles are in diameter of 1-10 μm, which can effectively adsorb dust suspended in the air.
Effectively control paroxysmal and spatial dust generated by blanking points, avoid dust spread, improve the working environment, reduce harm to workers' health, and consume less water, save energy and reduce emissions.
Smart Images
Figure CN222765929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dust suppression devices, and in particular to a micro-mist dust suppression device applied to a truck discharge point of a blast furnace ore bin. Background Art
[0002] In metallurgical enterprises, sintered ore, pelletized ore, limestone, flux, raw coal, coke, miscellaneous ore and other materials are mostly stored in ore bins, and all ore bins are arranged in a line in the main operating areas such as raw material plants, sintering plants, coking plants and iron and steel plants. During the unloading process of the ore bin truck discharge point, the falling materials cause disturbances in the surrounding air. When the disturbed airflow moves, it will drive small particles of materials to fly and generate dust. When the materials fall into the truck bin, the potential energy is released, and after rebounding, they collide with the subsequent materials that fall in, generating a large amount of dust at the unloading point. The disordered discharge of dust will cause environmental pollution, affect the working environment of the post, and cause harm to the physical and mental health of the workers. Utility Model Content
[0003] The utility model proposes a micro-mist dust suppression device applied to the discharge point of a blast furnace ore bin truck, which solves the problem in the related technology that a large amount of dust is generated at the discharge point during the unloading process of the ore bin truck. The disorderly discharge of dust will cause environmental pollution, affect the working environment of the post, and cause harm to the physical and mental health of the workers.
[0004] The technical solution of the utility model is as follows: a micro-mist dust suppression device applied to the truck discharge point of the blast furnace ore bin is used to be arranged below the drop opening of the ore bin, and the key lies in: comprising:
[0005] A first micro mist nozzle, wherein there are a plurality of the first micro mist nozzles, all of which are arranged around the material drop opening, and the outlet ends of the first micro mist nozzles are all facing below the material drop opening;
[0006] The second micro mist nozzles include a plurality of second micro mist nozzles, all of which are arranged around the material drop opening and are located at the periphery of the first micro mist nozzles, and the outlet ends of the second micro mist nozzles are all facing below the material drop opening.
[0007] All of the first micro-mist nozzles are arranged in a rectangular shape, the distance between two adjacent first micro-mist nozzles is 0.24-0.26 m, and the spray distance of the first micro-mist nozzles is 3.4-3.6 m.
[0008] It also includes a first atomization tube, which is located outside the material drop port. There are four first atomization tubes, all of which are arranged in a rectangular shape, and the first micro-mist nozzle is arranged on the first atomization tube.
[0009] It also includes a first atomization controller, there are two of the first atomization controllers, the first atomization controller has an exhaust port and a drain port, the first atomization pipe has a water inlet and an air inlet, the exhaust port of the first atomization controller is connected to the air inlets of the two first atomization pipes, and the drain port of the first atomization controller is connected to the water inlets of the two first atomization pipes.
[0010] Also includes,
[0011] a first water inlet valve, wherein the first water inlet valve is arranged at the water inlet of the first atomizing pipe, and the drain outlet of the first atomizing controller is connected to the water inlet of the first atomizing pipe by means of the first water inlet valve;
[0012] A first air inlet valve is arranged at the air inlet of the first atomization pipe, and an exhaust port of the first atomization controller is connected to the air inlet of the first atomization pipe by means of the first air inlet valve.
[0013] All the second micro-mist nozzles are arranged in a rectangular shape, the distance between two adjacent second micro-mist nozzles is 0.4-0.6m, and the spray distance of the second micro-mist nozzles is 3.4-3.6m.
[0014] It also includes a second atomization tube, which is located at the periphery of the drop port. There are four second atomization tubes, all of which are arranged in a rectangular shape, and the second micro-mist nozzle is arranged on the second atomization tube.
[0015] It also includes a second atomization controller, the number of which is four, the second atomization controller having an exhaust port and a drain port, the second atomization pipe is provided with a water inlet and an air inlet at the same time, the exhaust port of the second atomization controller is connected to the air inlet of the second atomization pipe, and the drain port of the second atomization controller is connected to the water inlet of the second atomization pipe.
[0016] Also includes,
[0017] a second water inlet valve, the second water inlet valve being arranged at the water inlet of the second atomizing pipe, and the drain outlet of the second atomizing controller being connected to the water inlet of the second atomizing pipe by means of the second water inlet valve;
[0018] A second air inlet valve is provided at the air inlet of the second atomization pipe, and an exhaust port of the second atomization controller is connected to the air inlet of the second atomization pipe via the second air inlet valve.
[0019] It also includes a sealing soft curtain, which is arranged around the drop port, the first micro-mist nozzle and the second micro-mist nozzle are both located inside the sealing soft curtain, the lower end surface of the sealing soft curtain is located below the first micro-mist nozzle and the second micro-mist nozzle, and a truck channel is left between the sealing soft curtain and the ground.
[0020] The working principle and beneficial effects of the utility model are as follows: there are multiple first micro-mist nozzles, all of which are arranged around a material drop opening, and the outlet ends of the first micro-mist nozzles are all facing below the material drop opening; there are multiple second micro-mist nozzles, all of which are arranged around the material drop opening and are located on the periphery of the first micro-mist nozzles, and the outlet ends of the second micro-mist nozzles are all facing below the material drop opening. All the first micro-mist nozzles are arranged in a circle below the material drop port, mainly to control the intermittent dust generated by the instantaneous disturbance of the airflow at the material drop port. All the second micro-mist nozzles are arranged in a circle below the material drop port, mainly to control the large amount of spatial dust generated by the potential energy release and collision with the subsequent falling materials after rebound when the materials fall into the vehicle compartment. Both the first micro-mist nozzle and the second micro-mist nozzle can produce water mist particles with a diameter of 1-10μm, which can effectively adsorb the dust suspended in the air, especially the respirable particles with a diameter of less than 2.5μm, and agglomerate them into agglomerates, so that they settle under the action of gravity, which can avoid the generation of a large amount of intermittent dust and rapid diffusion in the discharge point area of the mine warehouse truck. Controlling the dust at the source can avoid polluting the on-site environment, achieve a good dust suppression effect, provide a better job environment, and will not cause harm to the physical and mental health of the workers. In addition, the micro-mist dust suppression device consumes very little water, and almost does not cause changes in the moisture content of the material, which can achieve energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.
[0022] Figure 1 It is a structural schematic diagram of the utility model.
[0023] Figure 2 It is a schematic diagram of the arrangement of the first micro-mist nozzles at the periphery of the material drop opening in the utility model.
[0024] Figure 3 It is a schematic diagram of the arrangement of the second micro mist nozzles around the first micro mist nozzles in the utility model.
[0025] Figure 4 It is a schematic diagram of the connection structure between the first micro-mist nozzle and the first atomization pipe in the utility model.
[0026] Figure 5 It is a schematic diagram of the connection structure between the second micro-mist nozzle and the second atomization pipe in the utility model.
[0027] Figure 6 It is a schematic diagram of the positional relationship between the second micro-mist nozzle and the sealing soft curtain in the utility model.
[0028] In the figure: 1. material drop port, 2. first micro mist nozzle, 3. second micro mist nozzle, 4. first atomizing pipe, 5. first atomizing controller, 6. first water inlet valve, 7. first air inlet valve, 8. second atomizing pipe, 9. second atomizing controller, 10. second water inlet valve, 11. second air inlet valve, 12. sealing soft curtain. DETAILED DESCRIPTION
[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0030] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".
[0031] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0032] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0033] Example, see Figure 1~Figure 3, is an embodiment of the utility model, and proposes a micro-mist dust suppression device applied to the truck discharge point of the blast furnace ore bin, which is used to be arranged below the blanking port 1 of the ore bin, including a first micro-mist nozzle 2 and a second micro-mist nozzle 3. The first micro-mist nozzle 2 has multiple, all of which are arranged around the blanking port 1, and the outlet ends of the first micro-mist nozzles 2 are all facing below the blanking port 1; the second micro-mist nozzle 3 has multiple, all of which are arranged around the blanking port 1, and are all located on the periphery of the first micro-mist nozzle 2, and the outlet ends of the second micro-mist nozzles 3 are all facing below the blanking port 1.
[0034] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, all the first micro mist nozzles 2 are arranged in a rectangular shape, and the spacing between two adjacent first micro mist nozzles 2 is 0.24-0.26m and preferably 0.25m. On the premise of ensuring that the space below the drop port 1 can be covered by the first micro mist nozzles 2, the spacing between the axes of two adjacent first micro mist nozzles 2 is increased as much as possible, and the number of first micro mist nozzles 2 can be reduced. The spray distance of the first micro mist nozzle 2 is 3.4-3.6m and preferably 3.5m, ensuring that the water mist particles sprayed by the first micro mist nozzle 2 can reach the drop point to avoid the generated dust overflow.
[0035] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, it also includes a first atomizing tube 4, which is located outside the blanking port 1. There are four first atomizing tubes 4, all of which are arranged in a rectangular shape, and the first micro-mist nozzles 2 are arranged on the first atomizing tubes 4. Multiple first micro-mist nozzles 2 are arranged on the same first atomizing tube 4. During installation, only four first atomizing tubes 4 need to be fixed, which is convenient and quick to disassemble and assemble, saving time and effort.
[0036] Furthermore, if Figure 1 As shown, it also includes a first atomization controller 5, the number of which is two, the first atomization controller 5 has an exhaust port and a drain port, the first atomization tube 4 has a water inlet and an air inlet, the exhaust port of the first atomization controller 5 is connected to the air inlets of the two first atomization tubes 4, and the drain port of the first atomization controller 5 is connected to the water inlets of the two first atomization tubes 4. Each first atomization controller 5 is connected to the two first atomization tubes 4, and the air intake and water intake of the two first atomization tubes 4 can be adjusted simultaneously by the first atomization controller 5, so as to adjust the spray effect of the first micro-mist nozzle 2 and better achieve the dust suppression effect. The four first atomization tubes 4 are divided into two parallel groups. When a problem occurs in one of the first atomization tubes 4 and needs maintenance, it will not affect the normal use of the other two first atomization tubes 4.
[0037] Furthermore, if Figure 2 , Figure 3 and Figure 4 As shown, it also includes a first water inlet valve 6 and a first air inlet valve 7. The first water inlet valve 6 is arranged at the water inlet of the first atomizing pipe 4, and the drain outlet of the first atomizing controller 5 is connected to the water inlet of the first atomizing pipe 4 by means of the first water inlet valve 6; the first air inlet valve 7 is arranged at the air inlet of the first atomizing pipe 4, and the exhaust outlet of the first atomizing controller 5 is connected to the air inlet of the first atomizing pipe 4 by means of the first air inlet valve 7. When the water output and air output of the first atomizing controller 5 are constant, the water inlet of each first atomizing pipe 4 can be adjusted by the first water inlet valve 6, and the air inlet of each first atomizing pipe 4 can be adjusted by the first air inlet valve 7, so as to adjust the spray effect of the first micro-mist nozzle 2 and achieve a better dust suppression effect.
[0038] Furthermore, if Figure 1 and Figure 3 As shown, all the second micro mist nozzles 3 are arranged in a rectangular shape, and the spacing between two adjacent second micro mist nozzles 3 is 0.4-0.6m and preferably 0.5m. On the premise of ensuring that the space below the material drop port 1 and located outside the first micro mist nozzle 2 can be covered by the second micro mist nozzle 3, the spacing between the axes of two adjacent second micro mist nozzles 3 is increased as much as possible, and the number of second micro mist nozzles 3 can be reduced. The spray distance of the second micro mist nozzle 3 is 3.4-3.6m and preferably 3.5m, ensuring that the water mist particles sprayed by the second micro mist nozzle 3 can reach the material drop point to avoid the generated dust overflow.
[0039] Furthermore, if Figure 1 and Figure 3 As shown, the second atomizing tube 8 is also included, and the second atomizing tube 8 is located outside the blanking port 1. There are four second atomizing tubes 8, and all the second atomizing tubes 8 are arranged in a rectangular shape. The second micro-mist nozzles 3 are arranged on the second atomizing tubes 8. Multiple second micro-mist nozzles 3 are arranged on the same second atomizing tube 8. When installing, only four second atomizing tubes 8 need to be fixed, which is convenient and quick to disassemble and assemble, saving time and effort.
[0040] Furthermore, if Figure 1As shown, it also includes a second atomization controller 9, the number of which is four, and the second atomization controller 9 has an exhaust port and a drain port. The second atomization tube 8 is provided with a water inlet and an air inlet at the same time, and the exhaust port of the second atomization controller 9 is connected to the air inlet of the second atomization tube 8, and the drain port of the second atomization controller 9 is connected to the water inlet of the second atomization tube 8. Each second atomization controller 9 is connected to a first atomization tube 4, and the air intake and water intake of the second atomization tube 8 can be adjusted by the second atomization controller 9, thereby adjusting the spray effect of the second micro-mist nozzle 3, and better achieving the dust suppression effect. The four second atomization tubes 8 are connected in parallel. When a problem occurs in one of the second atomization tubes 8 and needs maintenance, it will not affect the normal use of the other three second atomization tubes 8.
[0041] Furthermore, if Figure 3 and Figure 5 As shown, it also includes a second water inlet valve 10 and a second air inlet valve 11. The second water inlet valve 10 is arranged at the water inlet of the second atomizing pipe 8, and the drain outlet of the second atomizing controller 9 is connected to the water inlet of the second atomizing pipe 8 by means of the second water inlet valve 10; the second air inlet valve 11 is arranged at the air inlet of the second atomizing pipe 8, and the exhaust outlet of the second atomizing controller 9 is connected to the air inlet of the second atomizing pipe 8 by means of the second air inlet valve 11. When the water output and air output of the second atomizing controller 9 are constant, the water inlet of the second atomizing pipe 8 can be adjusted by the second water inlet valve 10, and the air inlet of the second atomizing pipe 8 can be adjusted by the second air inlet valve 11, thereby adjusting the spray effect of the second micro-mist nozzle 3 to better achieve the dust suppression effect.
[0042] Furthermore, if Figure 6 As shown, it also includes a sealing soft curtain 12, which is arranged around the blanking port 1, and the first micro-mist nozzle 2 and the second micro-mist nozzle 3 are both located inside the sealing soft curtain 12, and the lower end surface of the sealing soft curtain 12 is located below the first micro-mist nozzle 2 and the second micro-mist nozzle 3, and a truck channel is left between the sealing soft curtain 12 and the ground. The sealing soft curtain 12 can play a role of local sealing, so that the instantaneous intermittent dust and the 1-10μm water mist particles sprayed by the first micro-mist nozzle 2 and the second micro-mist nozzle 3 are fully combined in the effective space, adsorbed and settled, and the dust suppression effect can be further improved.
[0043] In this embodiment, taking the discharge point of the No. 4 blast furnace powder ore bin truck in the ironmaking area of a steel plant as an example, the dust suppression space at the discharge point is 6000mm long, 6000mm wide, and 4600mm high, and the discharge point is 3.5m above the ground. Four first atomizing pipes 4 are arranged in a rectangular shape outside the blanking port 1, and six first micro-mist nozzles 2 are arranged along the left and right directions on the front and rear first atomizing pipes 4, and eight first micro-mist nozzles 2 are arranged along the front and back directions on the left and right first atomizing pipes 4. All the first micro-mist nozzles 2 are arranged in a rectangular frame, and the spacing between two adjacent first micro-mist nozzles 2 is 0.25m, and the spray distance of the first micro-mist nozzle 2 is 3.5m. The two first atomizing pipes 4 located in front and on the right side of the blanking port 1 are connected to the same first atomizing controller 5, and the other two first atomizing pipes 4 are connected to another first atomizing controller 5.
[0044] The four second atomizing tubes 8 are arranged in a rectangular shape around the four first atomizing tubes 4. Seven second micro-mist nozzles 3 are arranged on the front and rear second atomizing tubes 8 along the left and right directions. Eleven second micro-mist nozzles 3 are arranged on the left and right second atomizing tubes 8 along the front and back directions. All the second micro-mist nozzles 3 are arranged in a rectangular frame. The spacing between two adjacent second micro-mist nozzles 3 is 0.5m, and the spray distance of the second micro-mist nozzles 3 is 3.5m. Each second atomizing tube 8 is connected to a second atomizing controller 9 separately.
[0045] All the first micro-mist nozzles 2 are arranged in a circle below the material drop port 1, mainly to control the intermittent dust generated by the instantaneous disturbance of the airflow at the material drop port 1. All the second micro-mist nozzles 3 are arranged in a circle below the material drop port 1, mainly to control the large amount of spatial dust generated by the potential energy release and collision with the subsequent falling materials after rebound when the materials fall into the vehicle compartment. The first micro-mist nozzles 2 and the second micro-mist nozzles 3 can both generate water mist particles with a diameter of 1-10μm, which can effectively adsorb the dust suspended in the air, especially the respirable particles with a diameter of less than 2.5μm, and agglomerate them into agglomerates, so that they settle under the action of gravity, which can avoid the generation of a large amount of intermittent dust and rapid diffusion in the discharge point area of the mine warehouse truck. Controlling the dust at the source can avoid polluting the on-site environment, achieve a good dust suppression effect, provide a better job environment, and will not cause harm to the physical and mental health of the workers. In addition, the micro-mist dust suppression device consumes very little water, and almost does not cause changes in the moisture content of the material, which can achieve energy saving and emission reduction.
[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A micro-mist dust suppression device applied to a truck discharge point of a blast furnace ore bin, arranged below a material discharge port (1) of the ore bin, characterized in that: include, A first micro-mist nozzle (2), wherein the first micro-mist nozzle (2) has a plurality of nozzles, all of which are arranged around the material drop opening (1), and the outlet ends of the first micro-mist nozzles (2) are all oriented toward the bottom of the material drop opening (1); A second micro mist nozzle (3), wherein the second micro mist nozzle (3) has a plurality of them, all of which are arranged around the material drop opening (1) and are located outside the first micro mist nozzle (2), and the outlet ends of the second micro mist nozzles (3) are all facing below the material drop opening (1).
2. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 1 is characterized in that: All of the first micro-mist nozzles (2) are arranged in a rectangular shape, the distance between two adjacent first micro-mist nozzles (2) is 0.24-0.26 m, and the spray distance of the first micro-mist nozzles (2) is 3.4-3.6 m.
3. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 1 is characterized in that: It also comprises a first atomizing tube (4), the first atomizing tube (4) being located at the periphery of the material drop opening (1), the number of the first atomizing tubes (4) being four, all of the first atomizing tubes (4) being arranged in a rectangular shape, and the first micro-mist nozzle (2) being arranged on the first atomizing tube (4).
4. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 3 is characterized in that: It also includes a first atomization controller (5), the number of the first atomization controllers (5) is two, the first atomization controllers (5) have an exhaust port and a drain port, the first atomization pipe (4) has a water inlet and an air inlet, the exhaust port of the first atomization controller (5) is connected to the air inlets of the two first atomization pipes (4), and the drain port of the first atomization controller (5) is connected to the water inlets of the two first atomization pipes (4).
5. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 4 is characterized in that: Also includes, a first water inlet valve (6), the first water inlet valve (6) being arranged at the water inlet of the first atomizing pipe (4), and the drain outlet of the first atomizing controller (5) being connected to the water inlet of the first atomizing pipe (4) by means of the first water inlet valve (6); A first air inlet valve (7), wherein the first air inlet valve (7) is arranged at the air inlet of the first atomizing pipe (4), and the exhaust port of the first atomizing controller (5) is connected to the air inlet of the first atomizing pipe (4) via the first air inlet valve (7).
6. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 1 is characterized in that: All of the second micro-mist nozzles (3) are arranged in a rectangular shape, the distance between two adjacent second micro-mist nozzles (3) is 0.4-0.6 m, and the spray distance of the second micro-mist nozzles (3) is 3.4-3.6 m.
7. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 6 is characterized in that: It also includes a second atomizing tube (8), the second atomizing tube (8) being located outside the material drop opening (1), the number of the second atomizing tubes (8) being four, all of the second atomizing tubes (8) being arranged in a rectangular shape, and the second micro-mist nozzle (3) being arranged on the second atomizing tube (8).
8. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 7 is characterized in that: The invention also comprises a second atomizing controller (9), wherein the number of the second atomizing controllers (9) is four, the second atomizing controllers (9) having an exhaust port and a drain port, the second atomizing pipe (8) being provided with a water inlet and an air inlet at the same time, the exhaust port of the second atomizing controller (9) being connected to the air inlet of the second atomizing pipe (8), and the drain port of the second atomizing controller (9) being connected to the water inlet of the second atomizing pipe (8).
9. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 8 is characterized in that: Also includes, a second water inlet valve (10), the second water inlet valve (10) being arranged at the water inlet of the second atomizing pipe (8), the drain outlet of the second atomizing controller (9) being connected to the water inlet of the second atomizing pipe (8) by means of the second water inlet valve (10); A second air inlet valve (11), wherein the second air inlet valve (11) is arranged at the air inlet of the second atomization pipe (8), and the exhaust port of the second atomization controller (9) is connected to the air inlet of the second atomization pipe (8) via the second air inlet valve (11).
10. The micro-mist dust suppression device applied to the truck discharge point of a blast furnace ore bin according to claim 1 is characterized in that: It also includes a sealing soft curtain (12), which is arranged around the drop opening (1), the first micro-mist nozzle (2) and the second micro-mist nozzle (3) are both located inside the sealing soft curtain (12), the lower end surface of the sealing soft curtain (12) is located below the first micro-mist nozzle (2) and the second micro-mist nozzle (3), and a truck passage is left between the sealing soft curtain (12) and the ground.