Flat top blast furnace cast house

Abstract

The utility model provides a kind of flat blast furnace casthouse, including the blast furnace and iron tapping channel being arranged in workshop, blast furnace is arranged in the side in workshop, the bottom surface of workshop is inclined downward from the position where blast furnace is arranged, and the gradient does not exceed 1%; iron tapping channel includes the main iron channel being connected in the tapping hole of blast furnace and being inclined downward, and the gradient does not exceed 2%, the end of main iron channel is connected with the branch iron channel being inclined downward, and the gradient does not exceed 2%, the slag channel being inclined downward is connected on main iron channel, and the gradient does not exceed 2%; concrete enclosure structure is arranged in the other side of workshop, main iron channel, slag channel, branch iron channel are arranged in concrete enclosure structure, dust removal device is arranged in tapping hole. The bottom surface of the casthouse of the utility model tends to be flat, greatly reduces the gradient of iron channel and slag channel, makes molten iron flow more stable, smoke dust is blocked in concrete enclosure structure, reduces environmental pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace ironmaking equipment, and more specifically, to a flat blast furnace tapping area. Background Technology

[0002] Currently, most small blast furnaces with a capacity of less than 1000m³ or other nickel-iron blast furnaces use a sloping design for their tapping areas. However, this sloping design results in uneven terrain, causing numerous inconveniences to production operations, affecting production efficiency, and hindering equipment installation, maintenance, and smooth production processes. A steep iron trough can cause excessively fast molten iron flow, making it difficult to control and prone to splashing and overflow, resulting in significant impact on equipment. Furthermore, iron and slag troughs are typically exposed to the elements, generating large amounts of particulate matter during tapping. This uncontrolled emission into the air not only severely pollutes the surrounding environment, failing to meet increasingly stringent environmental standards, but also endangers the health of on-site workers. Utility Model Content

[0003] In view of the above problems, the purpose of this utility model is to provide a flat blast furnace tapping area to solve the production disadvantages caused by the sloping design of the existing blast furnace tapping area, as well as the environmental pollution problems caused by iron troughs and slag troughs.

[0004] This utility model provides a flat blast furnace tapping area, including a blast furnace and a tapping channel located within the plant building, wherein... The blast furnace is located on one side of the plant building, and the bottom surface of the plant building slopes downward from the location where the blast furnace is located, with a slope not exceeding 1%. The iron tapping channel includes a main iron trough connected to the tapping port of the blast furnace and inclined downward with a slope of no more than 2%, a branch iron trough inclined downward with a slope of no more than 2% connected to the end of the main iron trough, and a slag trough inclined downward with a slope of no more than 2% connected to the main iron trough. A concrete enclosure structure is provided on the other side of the plant. The main iron trough, the slag trough, and the iron distribution trough are all located within the concrete enclosure structure. A dust removal device is provided at the iron outlet, covering the portion of the main iron trough between the iron outlet and the concrete enclosure structure. Fume hoods are provided at the outlets of the iron distribution trough and the slag trough.

[0005] One optional solution is that the concrete enclosure structure includes a sunken space opened along the bottom edge of the other side of the factory building, the sunken space is surrounded by concrete walls, a concrete flat roof is provided on the upper part of the sunken space, an entrance and exit of the sunken space is provided on the concrete flat roof, and a concrete base plate is provided at the bottom of the sunken space.

[0006] One possible solution is that the concrete flat roof is not lower than the bottom surface of the factory building.

[0007] One option is to provide a main iron trough inlet on the concrete wall of the concrete enclosure structure facing the iron outlet, and the main iron trough enters the sunken space through the main iron trough inlet.

[0008] One possible solution is to have a discharge hole at the bottom of the sinking space directly opposite the outlet of the iron separating ditch, and a slag discharge hole at the bottom of the sinking space directly opposite the outlet of the slag ditch; and to have a material transport channel leading to the outside provided below the discharge holes.

[0009] One option is that the flue of each of the fume hoods is connected to a flue located in the sunken space, and the flue passes through a concrete wall away from the blast furnace and connects to a dust collector outside the plant.

[0010] One optional solution is to seal and cover the main iron trough, the iron distribution trough, and the slag trough with stainless steel cover plates.

[0011] One option is that the dust removal device is a bag filter.

[0012] One option is that the side walls and top walls of the factory building are made of color steel plates, and each side wall is equipped with an observation window and a maintenance door.

[0013] One option is to install at least four axial flow fans in the factory building.

[0014] As described above, the flat blast furnace tapping area provided by this utility model has a floor slope of no more than 1%, and the slopes of the main iron trough, distribution iron trough, and slag trough are all no more than 2%. The main iron trough, distribution iron trough, and slag trough are housed within a concrete enclosure structure and equipped with dust removal equipment, significantly reducing particulate matter emissions into the plant and lowering the high temperatures within the plant. This utility model makes the bottom surface of the tapping area nearly flat, greatly reducing the slope of the iron and slag troughs, allowing for smoother molten iron flow, reducing splashing, and minimizing scouring of equipment. The smoke and dust generated in the iron and slag troughs are contained within the concrete enclosure structure, reducing environmental pollution and helping to protect personnel health and ensure safe production.

[0015] To achieve the foregoing and related objectives, one or more aspects of the present invention include the features that will be described in detail below and specifically pointed out in the claims. The following description and accompanying drawings illustrate certain exemplary aspects of the present invention. However, these aspects indicate only a few of the various ways in which the principles of the present invention can be used. Furthermore, the present invention is intended to include all such aspects and their equivalents. Attached Figure Description

[0016] Other objects and results of this invention will become more apparent and readily understood upon referring to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the flat blast furnace tapping area according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the factory building according to an embodiment of the present utility model; Figure 3 This is a structural schematic diagram of a concrete retaining structure according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the main iron trough according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the flue of a smoking hood according to an embodiment of the present invention; The components include: 1. Workshop, 11. Observation window, 12. Inspection door, 2. Blast furnace, 3. Iron tapping channel, 31. Main iron trough, 32. Branch iron trough, 33. Slag trough, 34. Stainless steel cover plate, 4. Concrete enclosure structure, 41. Sunken space, 42. Concrete wall, 43. Concrete flat roof, 44. Concrete base plate, 45. Entrance and exit, 46. Main iron trough entrance, 47. Discharge hole, 48. Slag discharge hole, 5. Dust removal device, 6. Fume hood, 61. Smoke pipe, 62. Flue, 63. Dust collector, 7. Material transport channel, and 8. Axial flow fan.

[0017] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0018] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0019] This invention can be modified in various ways and has various embodiments, with specific embodiments illustrated in the accompanying drawings. However, this invention is not limited to this specific implementation and all modifications, equivalents, and substitutions falling within the spirit and technical scope of this invention are to be understood as included.

[0020] Ordinal terms such as "first," "second," etc., may be used to describe various constituent elements, but the constituent elements are not limited to these terms. The terms are used only to distinguish one constituent element from another. For example, without departing from the scope of the claims of this utility model, a second constituent element may be named a first constituent element, and similarly, a first constituent element may be named a second constituent element. Terms and / or include combinations of multiple associated items or one of multiple associated items.

[0021] It should be understood that when referring to a constituent element being "connected" or "in contact" with other constituent elements, this includes not only cases where it is directly connected or in contact with other constituent elements, but also cases where other constituent elements exist between them. Conversely, when referring to a constituent element being "directly connected" or "directly in contact" with other constituent elements, it should be understood that no other constituent elements exist between them.

[0022] In the description of the embodiments, when it is stated that a certain component is formed "on or under" other components, "on or under" includes both two components that are in direct contact with each other and at least one other component that is configured to be formed between the two components. Furthermore, when expressed as "on or under", based on a certain component, it refers not only to the upper direction but may also include the lower direction.

[0023] The terminology used in this application is for illustrative purposes only and is not intended to limit the scope of the invention. Unless the context clearly specifies otherwise, singular expressions include plural expressions. In this application, terms such as "comprising" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof described in the specification, and do not preclude the presence or additional possibilities of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0024] Unless otherwise defined, including technical or scientific terms, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Terms as defined in commonly used dictionaries should be interpreted in a meaning consistent with their meaning in the context of the relevant art, and should not be construed as having an ideal or overly formal meaning unless explicitly defined in this application.

[0025] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 - Figure 5As shown in the figure, the flat blast furnace tapping area proposed in this embodiment can be used for tapping molten iron in ironmaking blast furnaces, and can also be used for the collection of solutions in other metal smelting.

[0027] This flat blast furnace tapping area includes a blast furnace 2 and a tapping channel 3, both located within the plant building 1. The blast furnace 2 is used for ironmaking and producing molten iron; its taphole is connected to the tapping channel 3 to facilitate the removal of the molten iron. Both the blast furnace 2 and the tapping channel 3 operate within the plant building 1.

[0028] To ensure a flat floor for the main iron tapping channel 3 and facilitate its installation, the blast furnace 2 is located on one side of the plant. The floor of the plant slopes downwards from the location of the blast furnace 2, with a gradient not exceeding 1%. The gradient is the percentage of the elevation difference between two points relative to their horizontal distance, calculated as follows: Gradient = (Elevation Difference / Horizontal Distance) × 100%. The design of the plant floor slopes downwards from the location of the blast furnace 2, with a slight gradient not exceeding 1%. This not only satisfies the requirements for constructing the main iron tapping channel 31 but also ensures the flatness of the production workspace, facilitating the installation and commissioning of other equipment and the daily operation and movement of staff.

[0029] The tapping channel 3 serves as the path for transporting molten iron and slag, and includes a main iron channel 31, a branch iron channel 32, and a slag channel 33. One end of the main iron channel 31 connects to the tapping spout of the blast furnace 2, and the other end connects to the inlet of the branch iron channel 32. The branch iron channel 32 includes multiple parallel channels that divert molten iron into multiple molten iron collection tanks. The slag channel 33 connects to the main iron channel 31 before the inlet of the branch iron channel 32, diverting slag into slag treatment equipment. The slag channel 33 and the branch iron channel 32 operate in opposite directions. All three channels—main iron channel 31, branch iron channel 32, and slag channel 33—are constructed using refractory castable.

[0030] To ensure a smooth flow of molten iron and slag, the tapping channel 3 includes a main iron trough 31 connected to the tapping spout of the blast furnace 2 and sloping downwards with a gradient not exceeding 2%. At the end of the main iron trough is a branch iron trough 32, also sloping downwards with a gradient not exceeding 2%. A slag trough 33, also sloping downwards with a gradient not exceeding 2%, is connected to the main iron trough 31. The gradients of the main iron trough 31, branch iron trough 32, and slag trough 33 all do not exceed 2%, allowing the molten iron and slag to flow naturally under their own gravity, resulting in a smooth flow. Compared to the 10% gradient in existing technologies, this reduces the risk of splashing, erosion and wear on the inner walls of the channels, and impact on the molten iron ladle, providing stable material transport conditions for subsequent molten iron ladle collection and slag treatment equipment operation.

[0031] The main iron ditch 31, the branch iron ditch 32 and the slag ditch 33 adopt the same slope standard, which facilitates unified planning during construction. The slope transition after the main iron ditch 31 and the branch iron ditch 32 and slag ditch 33 are connected is smooth and stable, ensuring the coordinated flow guiding performance of the entire iron discharge channel 3.

[0032] The slopes of the main iron ditch 31, the branch iron ditch 32, and the slag ditch 33 all do not exceed 2%, which is compatible with the 1% slope of the bottom surface of the plant 1, reducing the construction difficulty and project cost.

[0033] To prevent the indiscriminate emission of smoke and dust during the molten iron flow process, a cuboid concrete enclosure structure 4 is installed on the other side of the plant 1. The main iron trough 31, slag trough 33, and iron distribution trough 32 are all located within the concrete enclosure structure 4. The top of the concrete enclosure structure 4 is flat, slightly higher than or flush with the bottom of the plant 1. The flat top of the concrete enclosure structure 4 facilitates the movement of personnel and equipment. A dust removal device is installed at the taphole, covering the portion of the main iron trough 31 between the taphole and the concrete enclosure structure 4. The space between the concrete enclosure structure 4 and the taphole should be just right for installing the top suction hood of the dust removal device 5. The top suction hood can effectively suck up the smoke and dust exiting the taphole, preventing leakage. Smoke hoods 6 are installed at the outlets of the iron distribution trough 32 and the slag trough 33, which can suck up the smoke and dust discharged from the iron distribution trough 32 and the slag trough 33.

[0034] By placing each channel within the concrete retaining structure 4, the fumes from the main iron channel 31, branch iron channel 32, and slag channel 33, which guide molten iron and slag, are isolated within the concrete retaining structure 4. The fume hood 6 and dust removal device 5 further absorb fumes outside the concrete retaining structure 4, significantly reducing the amount of fumes emitted into the workspace and protecting the surrounding environment and the health of workers. The concrete retaining structure 4 also reduces the high-heat emissions during molten iron transportation into the plant 1, improving the working environment, while providing good protection for the channels and enhancing the overall structural stability and safety.

[0035] In one specific embodiment of this utility model, the concrete enclosure structure 4 includes a sunken space 41 formed along the bottom edge of the other side of the plant 1. Concrete walls 42 surround the sunken space 41, a concrete flat roof 43 is provided on the upper part of the sunken space 41, an entrance / exit 45 is provided on the concrete flat roof 43, and a concrete base 44 is provided at the bottom of the sunken space 41. Columns support the concrete flat roof 43 within the sunken space 41. Three edges of the concrete enclosure structure 4 are located on the bottom edge of the plant 1, and the other edge is inside the plant 1. The sunken space 41 can be a cuboid space excavated on the side of the plant 1 where the blast furnace 2 is not located. The sunken space 41 is constructed of concrete on all sides, bottom, and top, effectively isolating smoke and high heat. The flat roof of the sunken space 41 facilitates safe movement of personnel and equipment. The entrance door 45 on the concrete flat roof 43 facilitates the safe entry and exit of personnel into the concrete enclosure structure 4. When personnel need to enter the concrete enclosure structure 4, they can observe the conditions and temperature inside the concrete enclosure structure 4 through the entrance door 45 on the top and enter only after confirming that it is safe. The entrance door 45 is normally closed.

[0036] In one specific embodiment of this utility model, the concrete flat roof 43 is not lower than the bottom surface of the factory building 1. The concrete flat roof 43 of the concrete enclosure structure 4 may be slightly higher than or flush with the bottom surface of the factory building 1. The height of the concrete flat roof 43 and the bottom surface of the factory building 1 should be coordinated to avoid a large height difference within the factory building 1 and to ensure the stability of personnel walking and equipment movement within the entire factory building 1.

[0037] In one specific embodiment of this utility model, a main iron trough inlet 46 is provided on the concrete wall 42 of the concrete enclosure structure 4 facing the blast furnace 2, and the main iron trough 31 enters the sunken space 41 through the main iron trough inlet 46. The structural dimensions of the main iron trough inlet 46 on the concrete wall 42 of the concrete enclosure structure 4 should ensure that the main iron trough 31 can smoothly enter the concrete enclosure structure 4, and there should be no gaps between the concrete wall 42 and the outer wall of the main iron trough 31.

[0038] In one specific embodiment of this utility model, to facilitate the discharge of materials from the iron separating trough 32 and the slag trough 33 without excessive overflow of smoke and heat, a discharge hole 47 is provided at the bottom of the sinking space 41 directly opposite the outlet of the iron separating trough 32, and a slag discharge hole 48 is provided at the bottom of the sinking space 41 directly opposite the outlet of the slag trough 33. The size of the discharge hole 47 is sufficient to facilitate the discharge of materials from the outlet of the iron separating trough 32, and the size of the slag discharge hole 48 is sufficient to facilitate the discharge of slag from the outlet of the slag trough 33. The inner walls of both the discharge hole 47 and the slag discharge hole 48 can be lined with high-temperature resistant linings to prevent heat damage from high-temperature materials. The lining material can be refractory bricks or high-temperature resistant castables.

[0039] To facilitate the passage of vehicles transporting molten iron, a material transport channel 7 leading to the outside is provided below the discharge orifice 47. The material transport channel 7 extends through the bottom of each discharge orifice 47 and is wide enough for the operation of transport vehicles. A personnel walkway is also provided alongside the material transport channel 7 for easy movement of personnel. The material transport channel 7 can be 4 meters wide, and the personnel walkway can be 2 meters wide.

[0040] To facilitate the treatment of slag and effluent, a slag transport channel leading to the outside is provided below the slag discharge hole 48. The length and width of the slag transport channel should facilitate the placement and operation of the slag and effluent treatment equipment and the entry and exit of vehicles and personnel.

[0041] In one specific embodiment of this utility model, each fume hood 6 is connected to a flue 62 located in the sunken space 41. The flue 62 passes through a concrete wall 42 away from the blast furnace 2 and connects to a dust collector 63 outside the plant 1. The upper end of each fume hood 6 is connected to the flue 62 in the sunken space 41 via its own flue pipe 61. The flue 62 should be routed to minimize bends and shorten the path of the flue gas. To shorten the path of the flue gas during transport, the flue 62 is connected to the concrete wall 42 at the edge of the plant 1 to facilitate rapid exhaust of smoke and dust. The flue 62 is connected to the dust collector 63 to ensure that the treated flue gas meets environmental emission standards before being released into the atmosphere, thus protecting the environment. At the junction of the flue 62 and the concrete wall 42, a high-temperature resistant sealing material is used to fill and seal the gaps to prevent flue gas from leaking out and affecting the internal environment of the plant 1. An induced draft fan can also be installed between the dust collector 63 and the flue 62. By adjusting the power of the induced draft fan, the exhaust speed and air volume can be controlled to further improve the dust removal effect.

[0042] In one specific embodiment of this utility model, stainless steel cover plates 34 are sealed and covered on the main iron trough 31, the branch iron trough 32, and the slag trough 33. The thickness of the stainless steel cover plates 34 can be 12 mm, and a refractory lining is added to the inside of the stainless steel cover plates 34. The stainless steel cover plates 34 can effectively prevent high-temperature fumes from escaping, further confining the fumes within the troughs. The high-temperature fumes are effectively isolated by the stainless steel cover plates 34 and the concrete enclosure structure 4, which fully prevents the fumes and high temperatures from spreading into the plant 1, improving the working environment temperature of the plant 1 and providing safer and more comfortable working conditions for the operators.

[0043] The stainless steel cover plate 34 is connected to the main iron trench 31, the branch iron trench 32, and the slag trench 33 using a labyrinth connection method, resulting in a strong sealing effect. The stainless steel cover plate 34 is made of a material with good high-temperature resistance and corrosion resistance, enabling it to be used stably for a long time in high-temperature and dusty environments.

[0044] In one specific embodiment of this utility model, the dust removal device 5 is a bag filter 63. The top suction hood of the bag filter 63 is installed between the concrete retaining structure 4 and the tapping hole of the blast furnace 2, covering the main iron trough 31 between the tapping hole of the blast furnace 2 and the concrete retaining structure 4, absorbing the dust in this part, and further improving the overall dust removal effect. The dust on the entire tapping channel 3 is effectively treated, ensuring that the air quality in the plant 1 meets the requirements. The bag filter 63 works in conjunction with a high-efficiency fan, handling an air volume of 600,000 m³ / h, with a dust removal efficiency of 99.9%.

[0045] In one specific embodiment of this utility model, to ensure safe entry for personnel into the factory building 1, the side walls and top walls of the factory building 1 are made of color steel plates, and each side wall is equipped with an observation window 11 and an inspection door 12. Each side wall may have two observation windows 11 and one inspection door 12. Personnel can observe the situation inside the factory building 1 through the observation windows 11 and enter the factory building 1 only after confirming it is safe. The inspection door 12 facilitates personnel entry and exit.

[0046] In one specific embodiment of this utility model, to ensure a good working environment within the factory building 1, at least four axial flow fans 8 are installed inside the factory building 1, with an airflow rate of 10,000 m³ / h. The airflow from the axial flow fans 8 can lower the temperature inside the factory building 1, improving the comfort of personnel, while also promoting air circulation within the factory building 1 and expelling any residual smoke and dust that may be present outdoors. The axial flow fans 8 can be evenly distributed in different areas of the factory building 1 to ensure balanced ventilation in all locations.

[0047] In this embodiment, the dust concentration at the flat blast furnace tapping area decreased from 120 mg / m³ to 4.5 mg / m³ compared to the previous inclined tapping area. This resulted in a reduction of 582 tons of fugitive particulate matter emissions annually, a 15% increase in production efficiency, and a zero accident rate, achieving significant environmental, economic, and safety benefits.

[0048] The construction steps of the flat blast furnace tapping area in this embodiment are as follows: S1: Construct the factory building by tilting the bottom of the factory building downwards from the location of the blast furnace, with a slope not exceeding 1%.

[0049] If the inclined tapping area is to be modified, the bottom of the construction building can be leveled at the location of the blast furnace, reducing the original slope by 10%.

[0050] S2: Construct the iron tapping channel. First, construct a main iron trough that slopes downwards with a gradient of no more than 2% along the iron tapping point of the blast furnace. Then, construct a branch iron trough that slopes downwards with a gradient of no more than 2% at the end of the main iron trough, and construct a slag trough that slopes downwards with a gradient of no more than 2% on the main iron trough.

[0051] S3: Concrete retaining structure for construction, which encloses the main iron ditch, slag ditch, and branch iron ditch.

[0052] S4: Install the dust removal device in the main iron trough section between the iron tapping outlet and the concrete retaining structure, and install the fume hoods at the outlets of the iron distribution trough and slag trough respectively.

[0053] S5: Construct the side walls and top walls of the plant, and install observation windows and maintenance doors on the side walls. Install at least four axial flow fans inside the plant.

[0054] The flat blast furnace tapping area according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the flat blast furnace tapping area proposed in the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A flat top blast furnace cast house characterized by, This includes the blast furnace and tapping channels located within the factory building, among which, The blast furnace is located on one side of the plant building, and the bottom surface of the plant building slopes downward from the location where the blast furnace is located, with a slope not exceeding 1%. The iron tapping channel includes a main iron trough connected to the tapping port of the blast furnace and inclined downward with a slope of no more than 2%, a branch iron trough inclined downward with a slope of no more than 2% connected to the end of the main iron trough, and a slag trough inclined downward with a slope of no more than 2% connected to the main iron trough. A concrete enclosure structure is provided on the other side of the plant. The main iron trough, the slag trough, and the iron distribution trough are all located within the concrete enclosure structure. A dust removal device is provided at the iron outlet, covering the portion of the main iron trough between the iron outlet and the concrete enclosure structure. Fume hoods are provided at the outlets of the iron distribution trough and the slag trough.

2. The flat blast furnace tapping area as described in claim 1, characterized in that, The concrete enclosure structure includes a sunken space formed along the bottom edge of the other side of the factory building. The sunken space is surrounded by concrete walls, and a concrete flat roof is provided on the upper part of the sunken space. An entrance and exit door for the sunken space is provided on the concrete flat roof, and a concrete base slab is provided at the bottom of the sunken space.

3. The flat top blast furnace casting house according to claim 2, wherein The concrete flat roof is not lower than the bottom surface of the factory building.

4. The flat top blast furnace casthouse according to claim 2, wherein A main iron trough inlet is provided on the concrete wall of the concrete enclosure structure facing the iron outlet, and the main iron trough enters the sunken space through the main iron trough inlet.

5. The flat top blast furnace casthouse according to claim 2, wherein A discharge hole is provided at the bottom of the sinking space, directly opposite the outlet of the iron separating ditch, and a slag discharge hole is provided at the bottom of the sinking space, directly opposite the outlet of the slag ditch. A material transport channel leading to the outside is provided below the discharge hole.

6. The flat top blast furnace casthouse according to claim 2, wherein The flue of each of the fume hoods is connected to a flue located in the sunken space, which passes through a concrete wall away from the blast furnace and connects to a dust collector outside the plant.

7. The flat top blast furnace casthouse according to claim 1, wherein The main iron trough, the dividing iron trough, and the slag trough are all sealed and covered with stainless steel cover plates with refractory linings.

8. The flat furnace casting house according to claim 7, characterized in that The dust removal device is a bag filter.

9. The flat furnace casting house according to claim 1, wherein The side walls and roof of the factory building are made of corrugated steel sheets, and each side wall is equipped with an observation window and a maintenance door.

10. The flat top blast furnace casthouse according to claim 1, wherein At least four axial flow fans are installed in the factory building.

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