Control method of air curtain dust isolation system for open channel of dressing plant workshop

Abstract

The invention discloses a control method of an air curtain dust isolation system for an open channel of a dressing plant workshop, and the control method comprises the following steps: S1, controlling the airflow jet velocity of an air blowing device to be V0, s2, the flow Q blowing of the blowing device is calculated according to the airflow jet velocity V0 of the blowing device in the step S1, Q blowing meets the condition that the gas flow is controlled by controlling the gas jet velocity of the blowing device of the air curtain dust isolation system, a stable blowing and suction air curtain is effectively formed for different workshop hoisting channels of the gyratory crushing station, and the service life of the air curtain dust isolation system is prolonged. Soft sealing dust isolation on the two sides of the hoisting channel is achieved, and the functions of isolating and purifying dust in the hoisting channel are achieved.

Description

Technical Field

[0001] This invention relates to the field of mineral processing, crushing, and dust removal technology, and in particular to a control method for an air curtain dust isolation system used in open passageways of a mineral processing plant. Background Technology

[0002] The hoisting passageway in a metal mine crushing workshop is primarily used for hoisting large equipment and heavy objects into and out of the workshop. It is typically located next to the unloading point and is usually open at ground level, leading directly into the underground workshop. Due to the practical needs of equipment movement and workshop ventilation, the hoisting passageway needs to be frequently opened, making it impossible to achieve a fixed seal. This results in a large amount of dust, such as dust generated during ore unloading operations and road dust, entering the crushing workshop through the hoisting passageway. This leads to high dust concentrations, poor air quality, and serious health hazards for the workers operating within the workshop.

[0003] Existing dust control technologies for hoisting passages are relatively lacking. Generally, movable baffles are used to physically block the hoisting passage. When in use, the baffles are moved to open the hoisting passage, and when unloading ore, the baffles are covered to block the dust. However, this method only blocks dust at the millimeter level. It is difficult to block fine dust in the ambient air. A large amount of fine dust can still penetrate into the workshop environment through various poorly sealed parts of the hoisting passage, making it difficult to completely capture fine dust. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a control method for an air curtain dust isolation system for open passages in a mineral processing plant workshop. This control method controls the gas jet velocity of the blowing device of the air curtain dust isolation system, thereby controlling the gas flow rate. It effectively forms a stable blowing and suction air curtain for the hoisting passages of different gyratory crushing stations, achieving soft sealing dust isolation on both sides of the hoisting passage and realizing the isolation and purification functions of dust in the hoisting passage. Compared with the single dust emission point dust removal in the prior art, it can effectively improve dust removal efficiency and simplify the system structure.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solution: According to an embodiment of the present invention, a control method for an air curtain dust control system for an open passageway in a mineral processing plant includes an air blowing device and an air suction device. The air suction device and the air blowing device are disposed below the open opening of the open passageway in the mineral processing plant, and the air suction device and the air blowing device are arranged opposite to each other. The air blowing device and the air suction device are respectively arranged on two opposite long sides of the open opening. The control method includes: Step S1, control the airflow jet velocity of the blowing device to V0, where V0 satisfies: ; Step S2: Calculate the flow rate Q of the blower based on the air jet velocity V0 of the blower described in step S1. 吹 Among them, Q blows satisfy: , Wherein, L is the length of the long side of the opening in meters, W is the length of the short side of the opening in meters, B is the width of the jet strip of the blowing device in meters, and k is 0.3-0.6.

[0006] According to the control method of the blowing and suction type air curtain dust separation system for open passages in a mineral processing plant workshop according to an embodiment of the present invention, the air jet velocity of the blowing device is V0 and the flow rate Q of the blowing device is controlled. 吹 This technology enables airflow control, thereby improving the adaptability of the blowing and suction air curtain dust removal system. It forms a stable blowing and suction air curtain for the hoisting channels of different gyratory crushing plant workshops, achieving soft sealing and dust isolation on both sides of the hoisting channel, as well as the isolation and purification of dust in the hoisting channel. Compared with the single dust emission point dust removal technology in the prior art, it can effectively improve dust removal efficiency and simplify the system structure.

[0007] According to some embodiments of the present invention, the method further includes: step S3, controlling the flow rate Q of the suction device. 吸 Not less than the flow rate Q of the blower 吹 .

[0008] According to some embodiments of the present invention, the porous coupling air distribution device includes: a body portion, wherein an air distribution cavity is formed inside the body portion, the body portion has an air distribution inlet side at the rear, and an air distribution outlet side at the front, the air distribution outlet side being formed as a slot structure; and a porous coupling air distribution plate assembly, wherein the porous coupling air distribution plate assembly is disposed in the air distribution cavity and extends along the length direction of the air distribution cavity.

[0009] According to some embodiments of the present invention, the body portion includes: a top plate and a bottom plate arranged opposite to each other, the top plate having an upper side plate and an upper folding plate extending downward along the short side of the upper side plate, the bottom plate having a lower side plate and a lower folding plate extending upward along the short side of the lower side plate; a rear plate disposed between the top plate and the bottom plate; and side plates including a left side plate and a right side plate, the left side plate being disposed on the left side of the top plate, the bottom plate, and the rear plate, and the right side plate being disposed on the right side of the top plate, the bottom plate, and the rear plate, the edges of the upper folding plate, the left side plate, the right side plate, and the lower folding plate forming the air distribution outlet side.

[0010] According to some embodiments of the present invention, the cross-section of the body portion is formed into a wedge-shaped structure.

[0011] According to some embodiments of the present invention, the air distribution inlet side is an air inlet hole, and the air inlet hole includes a first air inlet hole and a second air inlet hole arranged at intervals along the length direction of the rear plate. The multi-hole coupled air distribution plate assembly includes: a left multi-hole coupled air distribution plate, one side of which is connected to the first air inlet hole and the other side of which extends forward along the length direction of the bottom plate to the left side plate; and a right multi-hole coupled air distribution plate, one side of which is connected to the second air inlet hole and the other side of which extends forward along the length direction of the bottom plate to the left side plate. The base plate extends forward along its length to the right side plate; there are a center-left multi-hole coupling air distribution plate and a center-right multi-hole coupling air distribution plate, one side of the center-left multi-hole coupling air distribution plate is connected to the first air inlet, and the other side of the center-left multi-hole coupling air distribution plate extends forward along the length of the base plate to the other side of the center-right multi-hole coupling air distribution plate; one side of the center-right multi-hole coupling air distribution plate is connected to the second air inlet, and the other side of the center-right multi-hole coupling air distribution plate extends forward along the length of the base plate to the other side of the center-left multi-hole coupling air distribution plate.

[0012] According to some embodiments of the present invention, the left-side porous coupling air distribution plate, the right-side porous coupling air distribution plate, the center-left porous coupling air distribution plate, and the center-right porous coupling air distribution plate are all unequal-spacing air distribution plates. The unequal-spacing air distribution plate has multiple sets of air holes that extend along the thickness direction of the plate. The air holes of the unequal-spacing air distribution plate are configured such that the air hole density on the side closer to the air inlet is less than the air hole density on the side farther from the air inlet.

[0013] According to some embodiments of the present invention, the left-side porous coupling air distribution plate and the right-side porous coupling air distribution plate each have unequal spacing segments and equal spacing segments connected to the unequal spacing segments. The unequal spacing segments are adjacent to the air inlet holes and the equal spacing segments are adjacent to the side plates. The spacing between each group of air holes in the unequal spacing segments is not equal, and the density of air holes near the equal spacing segments is greater than the density of air holes near the air inlet holes. Each group of air holes in the equal spacing segments is distributed at equal intervals along the extension direction of the plate body.

[0014] According to some embodiments of the present invention, both the center-left-center multi-hole coupling air distribution plate and the center-right-center multi-hole coupling air distribution plate have unequal spacing segments and equal spacing segments connected to the unequal spacing segments. The unequal spacing segment of the center-left-center multi-hole coupling air distribution plate is adjacent to the first air inlet hole, and the unequal spacing segment of the center-right-center multi-hole coupling air distribution plate is adjacent to the second air inlet hole. The equal spacing segments of the center-left-center multi-hole coupling air distribution plate and the equal spacing segments of the center-right-center multi-hole coupling air distribution plate are adjacent to each other. The spacing between each group of air holes in the unequal spacing segments is not equal, and the density of air holes near the equal spacing segments is greater than the density of air holes near the air inlet hole. The air holes in each group of air holes in the equal spacing segments are evenly distributed along the extension direction of the plate body.

[0015] According to some embodiments of the present invention, the blowing and suction type air curtain dust separation system further includes a central air distribution plate, which is disposed in the middle of the air inlet and located between the left multi-hole coupling air distribution plate and the center-left multi-hole coupling air distribution plate, and between the right multi-hole coupling air distribution plate and the center-right multi-hole coupling air distribution plate.

[0016] Other features and advantages of the invention will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims and drawings. Attached Figure Description

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein: Figure 1 This is a schematic diagram of a control method for an air curtain dust control system in an open passageway of a mineral processing plant, according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the principle of an air curtain dust isolation system for an open passageway in a mineral processing plant according to an embodiment of the present invention. Figure 3 This is a schematic diagram of an air curtain dust control system for an open passageway in a mineral processing plant, according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the blowing device of an air curtain dust control system for an open passageway in a mineral processing plant according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the left porous coupling air distribution plate (right porous coupling air distribution plate) of an air curtain dust control system for an open passageway in a mineral processing plant according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the blowing device of an air curtain dust control system for an open passageway in a mineral processing plant according to an embodiment of the present invention. Attached Figure

[0018] Air curtain dust control system 100; Dust collector 10; Dust collector air inlet 11; Dust collector air outlet 12; Blowing device 20; Dust collector outlet duct 21; Blowing duct 22; Body 23; Multi-hole coupling air distribution plate assembly 24; Top plate 231; Bottom plate 232; Rear plate 233; Side plate 234; Air distribution outlet side 235; Air inlet 236; Air distribution cavity 237; Left-side multi-hole coupling air distribution plate 241; Right-side multi-hole coupling air distribution plate 242; Center-left multi-hole coupling air distribution plate 243; Center-right multi-hole coupling air distribution plate 244; Center air distribution plate 245; Suction device 30; Opening 50; Dust collector inlet duct 21; Suction duct 22. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] The following is a reference appendix. Figures 1-6This invention describes a control method for an air curtain dust control system for an open passageway in a mineral processing plant workshop, used in a hoisting passageway of a gyratory crushing station workshop, according to an embodiment of the present invention.

[0024] like Figures 2-5 The air curtain dust control system includes a blowing device and a suction device. The suction device and the blowing device are located at the opening of an open passageway in the ore dressing plant workshop. The suction device and the blowing device are arranged opposite each other, respectively along two opposite long sides of the opening. For example, in some examples, such as... Figure 2 The suction device and the blowing device are located below the hoisting opening in the hoisting channel of the gyratory crushing station workshop.

[0025] The control method includes: Step S1, control the airflow jet velocity of the blowing device to V0, where V0 satisfies: ; Step S2: Calculate the flow rate Q of the blower based on the air jet velocity V0 of the blower described in step S1. 吹 , where Q 吹 satisfy: , Wherein, L is the length of the long side of the opening in meters, W is the length of the short side of the opening in meters, B is the width of the jet strip of the blowing device in meters, and k is 0.3-0.6.

[0026] According to an embodiment of the present invention, a control method for an air curtain dust control system for an open passageway in a mineral processing plant is used to control the air jet velocity of the blowing device to V0 and the flow rate Q of the blowing device. 吹 This technology enables airflow control, thereby improving the adaptability of the air curtain dust removal system. It forms a stable air curtain for the hoisting channels of different gyratory crushing plant workshops, achieving soft sealing and dust isolation on both sides of the hoisting channel, as well as the isolation and purification of dust in the hoisting channel. Compared with the single dust emission point dust removal technology in the prior art, it can effectively improve dust removal efficiency and simplify the system structure.

[0027] In some embodiments of the present invention, in order to further improve dust removal efficiency and prevent dust from escaping through the hoisting channel, and to improve the soft sealing effect of the air curtain, the control method further includes step S3, controlling the flow rate Q of the suction device. 吸 Not less than the flow rate Q of the blower 吹 In this way, on the one hand, the dust removal efficiency is improved by increasing the flow rate of the suction device, and on the other hand, the problem of unstable air curtain and secondary dust escape caused by the flow rate of the blowing device being greater than that of the suction device is avoided.

[0028] In some embodiments of the present invention, such as Figure 3 The opening 50 has two oppositely arranged long sides, and the blowing device 20 and the suction device 30 are respectively arranged on the two oppositely arranged long sides. For example, the opening 50 can be a rectangular structure with oppositely arranged long sides and oppositely arranged short sides. The blowing device 20 and the suction device 30 are respectively arranged on the two oppositely arranged long sides. Preferably, the length of the blowing device 20 and the suction device 30 is not less than the length of the long side of the opening 50. This can improve the soft sealing and dust removal of fine dust entering through the opening 50, reduce energy consumption, and avoid poor sealing effect of the blowing and suction curtain caused by excessive distance between the blowing device 20 and the suction device 30.

[0029] In some embodiments of the present invention, such as Figure 3 and Figure 4 The multi-hole coupling air distribution device includes a main body 23 and a multi-hole coupling air distribution plate assembly 24. An air distribution cavity 237 is formed inside the main body 23. The main body 23 has an air distribution inlet side at its rear and an air distribution outlet side 235 at its front. The air distribution outlet side 235 is formed as a slotted structure. The multi-hole coupling air distribution plate assembly 24 is disposed within the air distribution cavity 237 and extends along the length of the air distribution cavity 237. Through the coordinated design of the main body 23 and the multi-hole coupling air distribution plate assembly 24, a uniform jet flow can be ensured through the air distribution outlet side 235.

[0030] In some embodiments of the present invention, such as Figure 4 The main body 23 includes a top plate 231 and a bottom plate 232, a rear plate 233, and a side plate 234 arranged opposite to each other. The top plate 231 has an upper side plate 234 and an upper folded plate extending downward along the short side of the upper side plate 234. The bottom plate 232 has a lower side plate 234 and a lower folded plate extending upward along the short side of the lower side plate 234. The rear plate 233 is located between the top plate 231 and the bottom plate 232. The side plate 234 includes a left side plate 234 and a right side plate 234. The left side plate 234 is located on the left side of the top plate 231, the bottom plate 232, and the rear plate 233. The right side plate 234 is located on the right side of the top plate 231, the bottom plate 232, and the rear plate 233. The edges of the upper folded plate, the left side plate 234, the right side plate 234, and the lower folded plate form an air distribution side 235.

[0031] In some embodiments of the present invention, such as Figure 4 The cross-section of the main body 23 is formed into a wedge-shaped structure, and the front end of the wedge-shaped structure forms a slit-like air outlet side 235.

[0032] In other embodiments of the invention, such as Figure 4The air inlet side of the uniform air distribution plate is an air inlet hole 236, and the air inlet hole 236 includes a first air inlet hole 236 and a second air inlet hole 236 arranged at intervals along the length direction of the rear plate 233. The multi-hole coupling air distribution plate assembly 24 includes a left multi-hole coupling air distribution plate 241, a right multi-hole coupling air distribution plate 242, a center-left multi-hole coupling air distribution plate 243, and a center-right multi-hole coupling air distribution plate 244.

[0033] Furthermore, one side of the left-side porous coupling air distribution plate 241 is connected to the first air inlet 236, and the other side of the left-side porous coupling air distribution plate 241 extends forward along the length of the base plate 232 to the left-side plate 234. One side of the right-side porous coupling air distribution plate 242 is connected to the second air inlet 236, and the other side of the right-side porous coupling air distribution plate 242 extends forward along the length of the base plate 232 to the right-side plate 234. One side of the center-left porous coupling air distribution plate 243 is connected to the first air inlet 236, and the other side of the center-left porous coupling air distribution plate 243 extends forward along the length of the base plate 232 to the other side of the center-right porous coupling air distribution plate 244. One side of the center-right porous coupling air distribution plate 244 is connected to the second air inlet 236, and the other side of the center-right porous coupling air distribution plate 244 extends forward along the length of the base plate 232 to the other side of the center-left porous coupling air distribution plate 243. This creates a stable jet between the blowing device 20 and the suction device 30, thereby forming a blowing and suction curtain.

[0034] In some examples of the present invention, such as Figure 4 The left-side multi-hole coupling air distribution plate 241, the right-side multi-hole coupling air distribution plate 242, the center-left multi-hole coupling air distribution plate 243, and the center-right multi-hole coupling air distribution plate 244 are all unequal-spacing air distribution plates. Each unequal-spacing air distribution plate has multiple sets of air holes extending along the plate's thickness direction. The air holes in the unequal-spacing air distribution plates are configured such that the density of air holes near the air inlet 236 is less than the density of air holes away from the air inlet 236. This results in a gradually coupling air hole distribution along the streamlined structure of the air distribution plate, with a higher density closer to the end (away from the air inlet 236). After the air enters from the blowing duct 22, it passes through this device to achieve uniform airflow adjustment, and then exits through the slit-shaped air distribution outlet side 235.

[0035] In some examples of the present invention, such as Figure 4The left-side multi-hole coupling air distribution plate 241 and the right-side multi-hole coupling air distribution plate 242 both have unequal spacing sections and equal spacing sections connected to the unequal spacing sections. The unequal spacing sections are adjacent to the air inlet 236 and the equal spacing sections are adjacent to the side plate 234. The spacing of each group of air holes in the unequal spacing sections is not equal, and the density of air holes near the equal spacing sections is greater than the density of air holes near the air inlet 236. Each group of air holes in the equal spacing sections is distributed at equal intervals along the extension direction of the plate body. Through the design of the air hole distribution in the unequal spacing sections and the air hole distribution in the equal spacing sections, the gas jet from the slit-shaped air distribution outlet side 235 is stable and uniform.

[0036] In some examples of the present invention, such as Figure 4 To further improve the smooth output of a stable gas jet from the outlet side 235 of the blowing device 20, thereby forming a blowing and suction air curtain under the open opening 50 and improving the soft sealing effect and dust removal effect, the center-left multi-hole coupling air distribution plate 243 and the center-right multi-hole coupling air distribution plate 244 both have unequal spacing sections and equal spacing sections connected to the unequal spacing sections. The unequal spacing section of the center-left multi-hole coupling air distribution plate 243 is adjacent to the first air inlet 236 and the unequal spacing section of the center-right multi-hole coupling air distribution plate 244 is adjacent to the second air inlet 236. The equal spacing sections of the center-left multi-hole coupling air distribution plate 243 and the equal spacing sections of the center-right multi-hole coupling air distribution plate 244 are adjacent to each other. The spacing of each group of air holes in the unequal spacing section is not equal, and the density of air holes near the equal spacing section is greater than the density of air holes near the air inlet 236. The air holes in each group of air holes in the equal spacing section are evenly distributed along the extension direction of the plate.

[0037] Furthermore, such as Figure 4 The multi-hole coupling air distribution plate assembly 24 also includes a central air distribution plate 245. The central air distribution plate 245 is located in the middle of the air inlet 236 and between the left multi-hole coupling air distribution plate 241 and the central left multi-hole coupling air distribution plate 243, and between the right multi-hole coupling air distribution plate 242 and the central right multi-hole coupling air distribution plate 244. In this way, the airflow entering through the air inlet 236 is uniformly distributed by the air distribution plates at each position, avoiding the problem of uneven airflow jet caused by excessively high local wind pressure.

[0038] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A control method for an air curtain dust control system in an open passageway of a mineral processing plant, the air curtain dust control system comprising: A blowing device and a suction device are provided, wherein the suction device and the blowing device are located at the open opening of an open passageway in the ore dressing plant workshop, the suction device and the blowing device are arranged opposite to each other, and the blowing device and the suction device are respectively arranged on two opposite long sides of the open opening, characterized in that the control method includes: Step S1, control the airflow jet velocity of the blowing device to V0, where V0 satisfies: ; Step S2: Calculate the flow rate Q of the blower based on the air jet velocity V0 of the blower described in step S1. 吹 Among them, Q blows satisfy: , Wherein, L is the length of the long side of the opening in meters, W is the length of the short side of the opening in meters, B is the width of the jet strip of the blowing device in meters, and k is 0.3-0.

6.

2. The control method for an air curtain dust control system in an open passageway of a mineral processing plant as described in claim 1, characterized in that, Also includes: Step S3: Control the flow rate Q of the suction device. 吸 Not less than the flow rate Q of the blower 吹。 3. The control method for an air curtain dust control system for an open passageway in a mineral processing plant, as described in claim 2, is characterized in that... The blowing device is equipped with a multi-hole coupling air distribution device, which includes: The main body has an air distribution cavity formed inside it. The rear side of the main body has an air distribution inlet side, and the front side of the main body has an air distribution outlet side. The air distribution outlet side is formed as the jet strip slit. A porous coupling air distribution plate assembly is disposed within the air distribution cavity and extends along the length direction of the air distribution cavity.

4. The control method for an air curtain dust control system for an open passageway in a mineral processing plant, as described in claim 3, is characterized in that... The body portion includes: A top plate and a bottom plate are arranged opposite to each other. The top plate has an upper side plate and an upper folded plate extending downward along the short side of the upper side plate. The bottom plate has a lower side plate and a lower folded plate extending upward along the short side of the lower side plate. A rear plate, wherein the rear plate is disposed between the top plate and the bottom plate; The side panel includes a left side panel and a right side panel. The left side panel is located on the left side of the top panel, the bottom panel, and the rear panel, and the right side panel is located on the right side of the top panel, the bottom panel, and the rear panel. The edges of the upper folding plate, the left side panel, the right side panel, and the lower folding plate form the jet strip slit.

5. The control method for an air curtain dust control system for an open passageway in a mineral processing plant, as described in claim 4, is characterized in that... The cross-section of the body is formed into a wedge shape.

6. The control method for an air curtain dust control system for an open passageway in a mineral processing plant according to any one of claims 4-5, characterized in that, The air distribution inlet side is an air inlet hole, and the air inlet hole includes a first air inlet hole and a second air inlet hole arranged at intervals along the length direction of the rear plate. The multi-hole coupled air distribution plate assembly includes: A multi-hole coupling air distribution plate on the left side, one side of which is connected to the first air inlet and the other side of which extends forward along the length of the base plate to the left side plate. The right-side porous coupling air distribution plate has one side connected to the second air inlet and the other side extending forward along the length of the base plate to the right-side plate. The system comprises a center-left multi-hole coupling air distribution plate and a center-right multi-hole coupling air distribution plate. One side of the center-left multi-hole coupling air distribution plate is connected to the first air inlet, and the other side of the center-left multi-hole coupling air distribution plate extends forward along the length of the base plate to the other side of the center-right multi-hole coupling air distribution plate. One side of the center-right multi-hole coupling air distribution plate is connected to the second air inlet, and the other side of the center-right multi-hole coupling air distribution plate extends forward along the length of the base plate to the other side of the center-left multi-hole coupling air distribution plate.

7. The control method for an air curtain dust control system for an open passageway in a mineral processing plant according to claim 6, characterized in that, The left-side multi-hole coupling air distribution plate, the right-side multi-hole coupling air distribution plate, the center-left multi-hole coupling air distribution plate, and the center-right multi-hole coupling air distribution plate are all unequal-spacing air distribution plates. The unequal-spacing air distribution plate has multiple sets of air holes that run through the plate thickness direction. The air holes of the unequal-spacing air distribution plate are configured such that the air hole density on the side closer to the air inlet is less than the air hole density on the side farther away from the air inlet.

8. The control method for an air curtain dust control system for an open passageway in a mineral processing plant workshop according to claim 7, characterized in that, Both the left-side multi-hole coupling air distribution plate and the right-side multi-hole coupling air distribution plate have unequal spacing sections and equal spacing sections connected to the unequal spacing sections. The unequal spacing sections are adjacent to the air inlet holes and the equal spacing sections are adjacent to the side plates. The spacing between each group of air holes in the unequal spacing sections is not equal, and the density of air holes near the equal spacing sections is greater than the density of air holes near the air inlet holes. Each group of air holes in the equal spacing sections is evenly distributed along the extension direction of the plate body.

9. The control method for an air curtain dust control system for an open passageway in a mineral processing plant, as described in claim 8, is characterized in that... Both the center-left-center multi-hole coupling air distribution plate and the center-right-center multi-hole coupling air distribution plate have unequal spacing segments and equal spacing segments connected to the unequal spacing segments. The unequal spacing segment of the center-left-center multi-hole coupling air distribution plate is adjacent to the first air inlet, and the unequal spacing segment of the center-right-center multi-hole coupling air distribution plate is adjacent to the second air inlet. The equal spacing segments of the center-left-center multi-hole coupling air distribution plate and the equal spacing segments of the center-right-center multi-hole coupling air distribution plate are adjacent to each other. The spacing between each group of air holes in the unequal spacing segments is not equal, and the density of air holes near the equal spacing segments is greater than the density of air holes near the air inlet. The air holes in each group of air holes in the equal spacing segments are evenly distributed along the extension direction of the plate.

10. The control method for an air curtain dust control system for an open passageway in a mineral processing plant according to claim 8, characterized in that, A central air distribution plate is disposed in the middle of the air inlet and located between the left-side multi-hole coupling air distribution plate and the center-left multi-hole coupling air distribution plate, and between the right-side multi-hole coupling air distribution plate and the center-right multi-hole coupling air distribution plate.

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