Multifunctional roof clerestory capable of adjusting ventilation quantity and preventing dust from overflowing and method
By designing a multi-functional rooftop louver with adjustable ventilation and dust prevention, the problem of dust overflow in the slag treatment plant of the steelmaking system was solved, achieving efficient ventilation and environmentally friendly emissions, and meeting the usage requirements of the adjacent residential area.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- МААНЬШАНЬ АЙРОН ЭНД СТИЛ КО ЛТД
- Filing Date
- 2026-02-04
- Publication Date
- 2026-04-17
AI Technical Summary
The existing open-type ventilators cannot effectively prevent the leakage of high-temperature dust from the slag treatment plant of the steelmaking system, which leads to pollution of the plant and surrounding areas, and are unsuitable for use in close proximity to residential areas.
A multi-functional roof louver with adjustable ventilation volume was designed. By combining casement windows on the inner wall and sealed dust filters on the outer wall, the ventilation volume can be flexibly controlled and dust can be filtered. It includes internal and external operation and maintenance walkways, compressed air purging joints and safety railings to achieve efficient ventilation and dust prevention.
It enables flexible adjustment of ventilation volume according to working conditions and seasons to meet production needs, prevent dust overflow, achieve high standards of environmental protection emissions, reduce operating costs and labor intensity, and achieve social benefits of zero complaints.
Smart Images
Figure CN121875441A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of green roof louver technology, and more specifically, to a multifunctional roof louver and method that can adjust ventilation volume and prevent dust overflow. Background Technology
[0002] Steelmaking slag processing production lines are typically equipped with a number of hot pouring troughs and cutting troughs for online tipping of steel slag in slag pots and cutting and separating large pieces of slag steel. During the tipping of steel slag in the hot pouring troughs and the cutting and separation of large pieces of slag steel in the cutting troughs, a large amount of dust-laden high-temperature flue gas is generated. Even with corresponding dust removal facilities, the escape of the high-temperature airflow containing a large amount of dust generated instantaneously during the tipping of high-temperature steel slag is unavoidable. Therefore, ventilation and heat dissipation in the hot pouring trough and cutting trough areas of the slag processing plant, as well as preventing dust from overflowing the plant, are of paramount importance.
[0003] Currently, the slag treatment plants in steel mills have ordinary "open-air louvers" installed on the roofs of the hot pouring tank and cutting tank areas. Their main function is ventilation and heat dissipation, but they do not effectively remove the large amount of dust contained in the high-temperature airflow. Therefore, ordinary "open-air louvers" will cause serious dust pollution on the roof of the plant and a certain area around it. If the dust accumulated on the roof of the plant is not cleaned in time, it may even lead to a serious accident where the roof collapses.
[0004] Furthermore, when the hot pouring trough and cutting trough areas within the steel plant's slag treatment facility are adjacent to residential areas (less than 100 meters in a straight line), traditional open-roof ventilation ducts are clearly impractical. Therefore, achieving both ventilation and dust control in the slag treatment facility becomes a critical challenge that urgently needs to be addressed in order to determine whether a new steel plant can be built so close to residential areas. Summary of the Invention
[0005] 1. The technical problem that the invention aims to solve
[0006] To address the shortcomings and deficiencies of existing technologies, this invention provides a multifunctional rooftop louver and method for adjusting ventilation volume and preventing dust overflow. This invention flexibly controls the ventilation volume of the louver by adjusting the opening amount of the casement windows on the inner wall, meeting the ventilation needs of the production environment. Simultaneously, it is matched with an outer wall-sealed dust filter, filtering and preventing dust overflow during ventilation, ensuring emissions meet standards. This design not only meets the ventilation requirements of factory operations but also minimizes dust overflow. Since its implementation, there have been zero complaints from nearby residential areas, demonstrating significant economic and social benefits and broad prospects for widespread application.
[0007] 2. Technical Solution
[0008] To achieve the above objectives, the technical solution provided by this invention is as follows:
[0009] The present invention relates to a multifunctional roof ventilator with adjustable ventilation volume and dust prevention, comprising a ventilator body, which is installed on the top of the factory building. Depending on the location of dust-generating points (areas of multiple hot pouring troughs and cutting troughs) at the production workstations below the factory roof and the requirements for improving ventilation and dust filtration efficiency, multiple ventilator bodies can be installed on the top of the factory building in different arrangements (longitudinal or transverse, etc.) to efficiently cover and collect smoke and dust below the roof and ensure the efficiency and effect of ventilation in the factory building.
[0010] The main body of the gas tower is equipped with stairs for going up and down the gas tower; the main body of the gas tower on the roof of the factory building is surrounded by an outer ring maintenance walkway and an inner ring maintenance walkway.
[0011] The outer ring maintenance walkway is equipped with guardrails on its outer side; the inner ring maintenance walkway is equipped with an outer wall-sealed dust filter; and the inner ring maintenance walkway is equipped with an inner wall-sealed casement window.
[0012] Furthermore, the factory building has two spans, with the main body of the gas tower located in the center of the roof of the two spans.
[0013] Furthermore, an entrance / exit gate is provided between the outer ring maintenance walkway and the inner ring maintenance walkway.
[0014] Furthermore, the outer wall sealed dustproof filter is a roller shutter structure. When the inner wall sealed casement windows of the sealed ventilation opening inside the air tower are all closed and ventilation is not required, the outer wall sealed dustproof filter can be rolled up separately for protection.
[0015] Furthermore, compressed air purging joints are provided at intervals along both the outer and inner ring operation and maintenance walkways.
[0016] Furthermore, the main body of the gas tower is a longitudinally arranged gas tower structure at the central junction of the roofs of the two factory buildings.
[0017] Furthermore, the inner wall of the enclosed casement window of the closed louver ventilation opening set in the inner ring of the inner ring operation and maintenance corridor is an aluminum alloy inward opening casement window, and a safety net to prevent falls from height is set on the outside of the casement window.
[0018] The method for constructing a multi-functional roof louver that allows for adjustable ventilation and prevents dust leakage comprises the following steps:
[0019] S1. Depending on the season and the working conditions in the factory, select the state of the closed casement window on the inner wall of the air vent. When the working conditions in the factory or the low temperature environment in winter do not require ventilation, close the closed casement window on the inner wall of the air vent to achieve complete non-emission of dust-containing flue gas; when the working conditions in the factory or the high temperature environment in summer require ventilation, open the closed casement window on the inner wall of the air vent to simultaneously achieve dust filtration and air exchange of dust-containing flue gas.
[0020] S2. Based on the ventilation requirements in the factory, the ventilation volume of the main body of the air tower can be flexibly adjusted by adjusting the number or opening range of the closed casement windows on the inner side wall of the air tower ventilation opening, so as to meet the ventilation requirements of different production conditions and seasonal environments.
[0021] S3. When the sealed casement window on the inner wall of the air tower is in the ventilation state, the dust-laden airflow passes through the sealed casement window on the inner wall of the air tower and the sealed dust filter on the outer wall in sequence and is discharged to the outside. The dust in the dust-laden flue gas is filtered by the sealed dust filter on the outer wall so that the dust discharged outside the factory meets the emission standards.
[0022] S4. As needed, personnel can access the inner ring maintenance corridor via the stairs of the air vents to perform related operations, inspections, and cleaning / repairs of the inner wall sealed casement windows and outer wall sealed dust filters, or replace the casement windows; they can also access the outer ring maintenance corridor via the entrances and exits to perform "reverse cleaning maintenance (to improve filter permeability)" and inspection / repairs of the outer wall sealed dust filters, or replace the outer wall sealed dust filters. During the operation, guardrails will be used to ensure personnel safety.
[0023] Furthermore, in S2, the ventilation volume adjustment range is from zero to the maximum ventilation volume. The ventilation volume is zero by completely closing the casement window on the inner wall of the louver; the maximum ventilation volume is achieved by fully opening the casement window on the inner wall; and any ventilation volume between zero and the maximum ventilation volume is achieved by partially opening the casement window on the inner wall.
[0024] Furthermore, in S1, the operating conditions are determined according to the season and the working conditions inside the plant, including the operating conditions of the ambient temperature inside the plant in different seasons; the operating conditions of the hot slag pouring trough tipping operation, the operating conditions of the large slag steel cutting and separation operation, and the operating conditions of the dust concentration inside the plant.
[0025] 3. Beneficial effects
[0026] Compared with the prior art, the technical solution provided by this invention has the following advantages:
[0027] This invention can efficiently extract the rising dust-laden, high-temperature flue gas from local working points within the factory by opening different closed casement windows on the inner wall of the gas tower, adjusting the number of windows opened, or adjusting the opening degree, according to different seasons and the amount of dust-laden, high-temperature flue gas generated at various dust-generating points in the factory. Furthermore, it can flexibly adjust the ventilation volume of the entire gas tower to meet the requirements of various production environments. By installing a sealed dustproof filter on the outer wall, it can filter dust even when the gas tower is in ventilation mode, thus achieving the high environmental protection standards of "green production." Meanwhile, the invention's inner and outer ring operation and maintenance walkways, along with their spaced compressed air purging quick connectors; aluminum alloy casement windows on the inner wall and roller shutter-type sealed dust filters on the outer wall; high-altitude fall protection nets on the outer side of the inner wall casement windows and safety railings on the outer side of the outer ring operation and maintenance walkways, not only greatly facilitate employee operation and maintenance and improve the overall efficiency of the gas tower, but also significantly reduce the gas tower's operating costs and employee labor intensity, improve the safety of gas tower operation and maintenance, and increase the satisfaction of factory workers with the working environment.
[0028] This invention not only meets the ventilation requirements of the harsh working environment in slag treatment plants in the metallurgical field, but also solves the problem of dust overflow that exceeds environmental protection standards (zero complaints from nearby residential areas since its commissioning). It is the first in the industry to overcome the key problem that urgently needs to be solved when building a new steel plant in a residential area. It has significant economic and social benefits, and because it enables metallurgical plants (green steelmaking) to be integrated into urban residential areas, it has broad application value. Attached Figure Description
[0029] Figure 1 This is a top view of the present invention;
[0030] Figure 2 This is a cross-sectional view.
[0031] In the diagram: 1. Main body of the gas tower; 101. Staircase leading up and down the gas tower; 102. Enclosed casement window on the inner wall; 103. Inner ring maintenance walkway; 104. Enclosed dust filter on the outer wall; 105. Outer ring maintenance walkway; 106. Guardrail; 107. Inner and outer entrance doors; 2. Factory building. Detailed Implementation
[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0033] Example 1
[0034] from Figure 1 , Figure 2As can be seen, the multifunctional roof louver with adjustable ventilation and dust prevention in this embodiment includes a louver body 1. The louver body 1 is set on the top of the factory building 2. According to the location of dust generation points of the production station under the roof of the two-span factory building 2 and the requirement to improve ventilation and dust filtration efficiency, the louver body 1 is set longitudinally at the top of the central joint of the two-span factory building 2 to simultaneously and efficiently cover, collect and filter the smoke and dust under the two-span roof, and ensure the ventilation effect of the two-span factory building 2.
[0035] The main body of the air tower 1 is equipped with an air tower staircase 101; the air tower staircase 101 is connected to the crane operation and maintenance walkway in the two-span factory buildings 2, and is the passage to enter the main body of the air tower 1 at the top of the factory buildings 2.
[0036] The main body of the air vent on the top of the factory building is surrounded by an outer ring maintenance walkway 105 and an inner ring maintenance walkway 103.
[0037] The function of the inner ring maintenance corridor 103 is to perform related operations, inspections, cleaning and maintenance, or replacement of the casement windows of the inner wall sealed casement windows 102 and the outer wall sealed dust filter 104.
[0038] The function of the outer ring maintenance walkway 105 is to perform "reverse blowing maintenance (to improve the air permeability of the filter)" and inspection, maintenance or replacement of the outer wall sealed dust filter 104 from the outside.
[0039] Compressed air purging quick connectors are installed at intervals along the inner ring maintenance walkway 103 and the outer ring maintenance walkway 105. Operators can use external purging tools to purge and maintain the inner wall sealed casement windows 102 and the inner ring maintenance walkway 103, which are sealed ventilation openings on the inner wall. They can also perform "reverse purging" on the outer wall sealed dust filter 104 to improve the filter's air permeability, and at the same time, purge and clean the outer ring maintenance walkway 105.
[0040] The outer ring maintenance walkway 105 is equipped with guardrails 106 on its outer side; the guardrails 106 improve the safety protection effect and prevent personnel working on the outer ring maintenance walkway 105 from falling onto the roof.
[0041] An inner and outer entrance / exit gate 107 is provided between the outer ring operation and maintenance walkway 105 and the inner ring operation and maintenance walkway 103; the inner and outer entrance / exit gate 107 is used to connect the outer ring operation and maintenance walkway 105 and the inner ring operation and maintenance walkway 103.
[0042] The inner side wall of the outer ring maintenance walkway 105 is equipped with an outer wall sealed dust filter 104; the inner side wall of the inner ring maintenance walkway 103 is equipped with an inner wall sealed casement window 102 that seals the ventilation opening of the air vent.
[0043] To improve corrosion resistance to high-temperature fumes, the inner wall-sealed casement window 102, which serves a sealing function, is made of aluminum alloy. A safety net is installed on the outside of the casement window to prevent personnel from falling into the factory building. The inner wall-sealed casement window 102, which seals the ventilation opening, is the first line of defense for the ventilation system. When the inner wall-sealed casement window 102 is closed, it is in a non-ventilated state (often used in winter or when the factory's operating conditions do not require opening, achieving "zero emissions" of dust-laden fumes). When the inner wall-sealed casement window 102 is open, it is in a ventilated state (often used in summer or when the factory's operating conditions require opening, achieving high-standard emissions of ultra-purified dust-laden fumes). These two states can be flexibly switched according to different seasons and actual site conditions, including the degree of opening. Furthermore, depending on the dust conditions at different workstations within the factory, the inner wall-sealed casement window 102 can be partially opened to flexibly adjust the local ventilation volume, achieving efficient extraction and filtration of dust-laden, high-temperature rising fumes at corresponding workstations within the factory.
[0044] The outer wall sealed dust filter 104 consists of a steel structure frame and a dust filter (different filtration levels can be selected according to environmental protection requirements). It is the ultimate line of defense for dust removal in the ventilation state, ensuring that the dust overflowing outside the factory with the airflow meets the highest controllable emission standards. The outer wall sealed dust filter 104 is designed as a roll-up structure, which can be rolled up when not in use to reduce unnecessary losses.
[0045] In this embodiment, the factory building 2 consists of two spans of factory buildings, and the main body of the air tower 1 is located in the center of the roof of the two spans of factory buildings 2, thereby achieving the goal of efficient ventilation and dust filtration of the two spans of factory buildings at the same time with one air tower.
[0046] This invention allows for flexible adjustment of the ventilation volume and direction of the air vent by controlling the number of casement windows 102 sealed on the inner wall of the ventilation opening, thus meeting the requirements of the production environment. By setting up a dustproof filter 104 on the outer wall, the air vent can filter dust when it is in the ventilation state, thereby achieving the highest controllable environmental emission standards.
[0047] This invention, by flexibly adjusting the ventilation volume of the air vents, not only meets the ventilation requirements of the factory working environment under different seasons and working conditions, but also minimizes the amount of smoke and dust emitted to the outside. When ventilation of the air vents is required, dust is isolated by the dustproof filter screen on the outer wall to prevent dust from overflowing, ensuring that the highest controllable environmental emission standards are met. Since its implementation, it has achieved zero complaints in neighboring residential areas. It not only has significant economic and social benefits, but also has broad prospects for promotion and application and high comprehensive value.
[0048] Example 2
[0049] from Figure 1 , Figure 2As can be seen, the method for adjusting ventilation volume and preventing dust overflow in this embodiment of the multifunctional roof louver includes the following steps:
[0050] S1. Depending on the season and different working conditions in factory 2, select and switch the state of the sealed casement window 102 on the inner wall of the ventilator. When the factory 2 is in a low-temperature environment in winter or when ventilation is not required, close the sealed casement window 102 on the inner wall to achieve "zero emission" of dust-laden airflow. When the factory 2 needs ventilation or is in a high-temperature environment in summer, open the sealed casement window 102 on the inner wall to allow the dust-laden airflow to circulate.
[0051] S2. Based on the ventilation requirements in the factory building 2, by adjusting the inner wall closed casement windows 102 of different locations, quantities, and opening ranges, the ventilation direction and ventilation volume of the main body of the air tower 1 can be flexibly and efficiently adjusted to meet the ventilation requirements of different seasons and production environments.
[0052] S3. When the inner wall closed casement window 102 is in the ventilation state, the dust-laden flue gas passes through the inner wall closed casement window 102 and the outer wall closed dust filter 104 set at the ventilation opening on the inner wall of the air tower and is discharged to the outside. The dust filter 104 filters the dust in the dust-laden flue gas, so that the dust discharged outside the factory building 2 meets the controllable high standard emission requirements.
[0053] S4. As needed, maintenance personnel can enter the inner ring maintenance corridor 103 via the air duct stairs 101 to perform related operations, inspections, and cleaning and maintenance on the inner wall sealed casement windows 102 and the outer wall sealed dust filters 104, or replace the casement windows; they can enter the outer ring maintenance corridor 105 via the inner and outer entrance doors 107 to perform "reverse cleaning maintenance (to improve filter permeability)" and inspection and maintenance on the outer wall sealed dust filters 104 from the outside, or replace the outer wall sealed dust filters. During the operation, the safety of personnel is ensured by the guardrails 106.
[0054] In S2, the ventilation volume adjustment range is from zero to the maximum ventilation volume. The ventilation volume is zero by completely closing the inner wall closed casement window 102, and the maximum ventilation volume is achieved by fully opening all the inner wall closed casement windows 102. By partially opening the inner wall closed casement windows 102 or adjusting the opening degree of the inner wall closed casement windows 102, efficient extraction of dust-laden airflow at local working points in the factory or arbitrary ventilation volume adjustment between zero and the maximum ventilation volume can be achieved.
[0055] In S1, the operating conditions are determined according to the season and the working conditions in the plant 2, including the operating conditions of the ambient temperature in the plant in different seasons; the operating conditions of the steel slag hot pouring trough tipping operation, the operating conditions of the large slag steel cutting and separation operation, and the operating conditions of the dust concentration in the plant 2.
[0056] The innovation of this invention lies in its unique longitudinal arrangement on the roof of two factory buildings, corresponding to different workstations below; and its innovative combination of a hinged (easy-to-operate) window with a closed ventilation opening on the inner wall of the air vent and a rollable, lowerable dust filter on the outer wall of the air vent. Coupled with corresponding supporting staircases, inner and outer ring maintenance walkways, quick-connect purging couplings, and safety protection systems, this invention can efficiently and simultaneously achieve flexible adjustment of ventilation from zero to maximum for both factory buildings according to seasonal and operational needs, while maintaining the highest controllable environmental emission standards throughout the adjustment process. Furthermore, this air vent not only offers efficient and flexible ventilation adjustment and dust filtration (with the option of different filter models), but also boasts simple, convenient, reliable, and safe operation and maintenance with low operating costs.
[0057] The main body 1 of the present invention is a longitudinal air tower structure, which can simultaneously solve the problem of hot airflow discharge between two factory buildings and maximize the convection and dust filtration efficiency of the area where dust-containing high-temperature airflow is generated. The above technical features are difficult to achieve by traditional transverse air tower structures.
[0058] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A multifunctional rooftop louver with adjustable ventilation and dust leakage prevention, comprising a louver body (1), characterized in that: The main body of the air vent (1) is set on the top of the factory building (2). According to the location of the dust generation point of the production station under the roof of the factory building (2) and the requirements for improving the ventilation and dust filtration efficiency, multiple main bodies of air vent (1) with different arrangements (longitudinal or transverse, etc.) can be set on the top of the factory building (2) to efficiently cover and collect the smoke and dust under the roof and ensure the efficiency and effect of ventilation of the factory building (2). The main body (1) of the gas tower is equipped with a staircase (101) for going up and down the gas tower; the main body (1) of the gas tower on the top of the factory building is surrounded by an outer ring maintenance walkway (105) and an inner ring maintenance walkway (103). The outer ring maintenance walkway (105) is provided with guardrails (106) on the outer side; the inner ring maintenance walkway (105) is provided with an outer wall-sealed dust filter (104); the inner ring maintenance walkway (103) is provided with an inner wall-sealed casement window (102).
2. The multifunctional roof louver with adjustable ventilation and dust prevention according to claim 1, characterized in that: The factory building (2) has two spans, and the main body (1) of the gas tower is located in the center of the roof of the two spans of the factory building (2).
3. The multifunctional roof louver with adjustable ventilation and dust prevention as described in claim 1, characterized in that: An entrance / exit gate (107) is provided between the outer ring maintenance walkway (105) and the inner ring maintenance walkway (103).
4. The multifunctional roof louver with adjustable ventilation and dust prevention as described in claim 1, characterized in that: The outer wall sealed dustproof filter (104) is a roller shutter structure. When the inner wall sealed casement window (102) of the sealed ventilation opening in the air tower is completely closed and ventilation is not required, the outer wall sealed dustproof filter can be rolled up separately for protection.
5. The multifunctional roof louver with adjustable ventilation and dust prevention according to claim 3, characterized in that: Compressed air purging joints are provided at intervals along the outer ring maintenance walkway (105) and the inner ring maintenance walkway (103).
6. The multifunctional roof louver with adjustable ventilation and dust prevention according to claim 1, characterized in that: The main body of the gas tower (1) is a longitudinally arranged gas tower structure at the central junction of the roofs of the two span factory buildings (2).
7. The multifunctional roof louver with adjustable ventilation and dust prevention according to claim 1, characterized in that: The inner wall of the closed ventilation opening of the inner ring of the inner ring maintenance walkway (103) is a closed casement window (102) made of aluminum alloy and is equipped with a safety net to prevent falling from height on the outside of the casement window.
8. The method for constructing a multifunctional rooftop louver with adjustable ventilation and dust prevention according to claim 5, characterized in that: The steps are as follows: S1. Depending on the season and the working conditions in the factory (2), select the state of the closed casement window (102) on the inner wall of the air tower. When the working conditions in the factory (2) or the low temperature environment in winter do not require ventilation, close the closed casement window (102) on the inner wall of the air tower ventilation opening to achieve complete non-emission of dust-containing flue gas. When the working conditions in the factory (2) or the high temperature environment in summer require ventilation, open the closed casement window (102) on the inner wall of the air tower ventilation opening to simultaneously achieve dust filtration and ventilation of dust-containing flue gas. S2. According to the ventilation volume requirements in the factory (2), the ventilation volume of the main body (1) of the air tower is flexibly adjusted by adjusting the number or opening range of the closed casement windows (102) on the inner side wall of the air tower ventilation opening, so as to meet the ventilation volume requirements of different production conditions and seasonal environments. S3. When the inner wall of the gas tower is closed and the casement window (102) is open for ventilation, the dust-laden airflow passes through the inner wall of the gas tower closed casement window (102) and the outer wall closed dust filter (104) in sequence and is discharged to the outside. The dust in the dust-laden flue gas is filtered by the outer wall closed dust filter (104) so that the dust discharged outside the factory building (2) meets the emission standards. S4. As needed, personnel can enter the inner ring maintenance corridor (103) through the air tower stairs (101) to perform relevant operations, inspections, and cleaning and maintenance or replacement of the casement windows on the inner wall of the sealed ventilation opening (102) and the outer wall of the sealed dust filter (104); and enter the outer ring maintenance corridor (105) through the inner and outer entrance doors (107) to perform "reverse cleaning maintenance (to improve the air permeability of the filter)" and inspection and maintenance or replacement of the outer wall of the sealed dust filter (104) from the outside. During the operation, personnel safety is ensured by the guardrail (106).
9. The method for constructing a multifunctional rooftop louver with adjustable ventilation and dust prevention according to claim 8, characterized in that: In the S2 described above, the ventilation volume adjustment range is from zero to the maximum ventilation volume. The ventilation volume is zero by completely closing the casement window (102) on the inner wall of the air tower; the maximum ventilation volume is achieved by completely opening the casement window (102) on the inner wall; and any ventilation volume adjustment between zero and the maximum ventilation volume is achieved by partially opening the casement window (102) on the inner wall.
10. The method for constructing a multifunctional rooftop louver with adjustable ventilation and dust prevention according to claim 8, characterized in that: In S1, the working conditions in the factory (2) are determined according to the season and the working conditions in the factory (2), including the working conditions of the ambient temperature in the factory (2) in different seasons. The working conditions of steel slag hot pouring trough overturning, large piece slag steel cutting and separation, and dust concentration in the plant (2).