Visual energy-saving liquid level holding device for runner and method of using the same

Abstract

This invention relates to the field of energy-saving and emission-reduction equipment technology in ironmaking, specifically disclosing a visual energy-saving molten iron trough surface insulation device and its usage method. The device includes a visual cover plate, a suspension rod, an insulation board, and a hydraulic lifting device. The visual cover plate comprises a steel frame, glass, a hydraulic positioning groove, and an upper suspension hook. The insulation board comprises a refractory shell and a lower suspension hook. The hydraulic lifting device comprises a hydraulic column and an electro-hydraulic control system. Glass is inlaid in the middle of the steel frame, and a hydraulic positioning groove and an upper suspension hook are located at the bottom of the steel frame. The upper end of the suspension rod is fixed to the upper suspension hook during operation, and the lower end of the suspension rod is fixed to the lower suspension hook. The lower suspension hook is installed on the top of the refractory shell. This invention reduces the maintenance time of the molten iron trough and the device, reduces the workload of replacing the insulation board, reduces the amount of refractory material used in the insulation board, and extends the service life of the refractory material. It features visualization, ease of operation, and ease of maintenance.

Description

Technical Field

[0001] This invention relates to the field of energy-saving and emission-reduction equipment technology in ironmaking, specifically to a visual energy-saving molten iron trough surface insulation device and its usage method. Background Technology

[0002] The molten iron trough is a crucial facility in a blast furnace, serving as a channel for molten iron to flow into the ladle after the high-temperature iron-slag mixture inside the furnace undergoes iron-slag separation. The tapping temperature of a blast furnace is generally above 1500℃ to ensure good fluidity of the molten iron and meet the temperature requirements of the steelmaking process. To reduce heat loss and temperature drop caused by thermal radiation from the high-temperature molten iron surface, most steel plants add a cover plate above the molten iron trough. This cover plate typically consists of a 2cm thick ordinary steel plate layer and a 20cm thick refractory material layer, serving both insulation, safety, and load-bearing functions.

[0003] The molten iron trough is typically rebuilt every 60 days. This requires removing the cover plate during construction and replacing it afterward. These covers are excessively thick and heavy, requiring manual lifting for both removal and replacement, which is extremely time-consuming and labor-intensive. Due to the different materials of the steel plate and refractory material layers, the steel and refractory layers expand and contract at different rates during repeated heating and cooling. During removal and replacement, collisions are inevitable, easily causing the refractory material layer to crack, chip, or partially detach from the steel plate, severely impacting the cover's lifespan and insulation performance. Furthermore, these covers lack observation capabilities, making it difficult to detect and repair detached refractory material layers promptly. The cover is generally about 1 meter above the molten iron surface, resulting in poor insulation, and the surface temperature exceeds 100°C, posing a safety risk to workers.

[0004] Therefore, in order to improve the insulation and maintenance performance of molten iron trough covers and extend the service life of refractory materials, it is necessary to develop a visual and energy-saving molten iron trough liquid surface insulation device and its usage method to solve the problems of time-consuming and laborious maintenance, lack of visibility, short service life of refractory materials, poor insulation effect, and certain safety hazards of existing molten iron trough covers. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of this invention is to provide a visual energy-saving molten iron trough liquid surface insulation device and its usage method, which has the characteristics of being visual, easy to operate, easy to maintain and repair, and having a long service life of refractory materials.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a visual energy-saving iron trough liquid surface heat preservation device, including a visual cover plate, a suspension rod, a heat preservation plate and a hydraulic lifting device. The visual cover plate includes a steel plate frame, glass, a hydraulic positioning groove and an upper suspension hook. The heat preservation plate includes a refractory shell and a lower suspension hook. The hydraulic lifting device includes a hydraulic column and an electro-hydraulic control system.

[0007] Glass is inlaid in the middle of the steel plate frame. The bottom of the steel plate frame is equipped with a hydraulic positioning groove and an upper suspension hook. The upper end of the suspension rod is fixed to the upper suspension hook in the working state, and the lower end of the suspension rod is fixed to the lower suspension hook. The lower suspension hook is installed on the top of the fire-resistant shell.

[0008] Specifically, the steel plate frame is welded from ordinary steel plates with a thickness of 2cm-3cm, and the glass is installed at the central axis position along the iron trough of the steel plate frame.

[0009] Specifically, the glass is 2cm-3cm thick tempered laminated glass, the width of the glass is 10cm-30cm smaller than the width of the iron trough, and the length of the glass is 20cm-60cm smaller than the length of the steel plate frame.

[0010] Specifically, the top of the hydraulic column is embedded in the hydraulic positioning groove, and the hydraulic positioning groove is used to position the visualization cover plate on the hydraulic column.

[0011] Specifically, the upper and lower suspension hooks have the same width, and the inner diameter of the upper and lower suspension hooks is 0.5cm-1cm larger than the diameter of the suspension rod. The two ends of the suspension rod are hooked to the upper and lower suspension hooks respectively. The middle part of the suspension rod is made of a rectangular structure with steel bars with a diameter of φ2cm-3cm. The inner width of the suspension rod is 1cm-2cm larger than the upper suspension hook.

[0012] Specifically, the top of the steel plate frame is provided with four lifting lugs, which are evenly distributed at the four corners of the steel plate frame. The lifting lugs are foldable and can be erected for uncoupling by the vehicle when in use.

[0013] Specifically, the insulation board has multiple panels laid under the same visible cover, and the width of the insulation board is 30cm to 50cm.

[0014] Specifically, the refractory shell is made of ceramic material that can withstand 1500 degrees Celsius, the refractory shell is 3cm-10cm thick, and the interior of the refractory shell is filled with refractory material, which is fibrous refractory material.

[0015] A 0.5cm-1cm thick fibrous refractory material is installed at the iron trough channel where the insulation board is located to prevent impact and seal the area.

[0016] Specifically, the hydraulic lifting device is fixed on both sides of the iron ditch channel. Each visual cover plate corresponds to a set of hydraulic lifting devices. Each set of hydraulic lifting devices has four hydraulic columns. When the hydraulic columns are lowered to the lowest point, the top of the hydraulic columns is 1cm-2cm lower than the lower surface of the visual steel plate.

[0017] A method for using a visual energy-saving molten iron trough surface insulation device includes the following steps:

[0018] S1. Use a crane to place the visual cover in the designated position, place the hydraulic positioning groove of the visual cover above the hydraulic column, and lower it, then remove the crane hook.

[0019] S2. Start the hydraulic lifting device's lifting program, raise the hydraulic column to a suitable height, stop the hydraulic lifting device, hang the upper end of the suspension rod on the upper suspension hook, and hang the insulation board on the lower end of the suspension rod.

[0020] S3. Start the hydraulic lifting device descent program, lower the hydraulic column to the lowest position, stop the hydraulic lifting device, the visual cover plate falls to the designated position on the ground, and the insulation board falls on the iron ditch channel.

[0021] S4. When the insulation board is found to be cracked through the visual cover plate and the damaged insulation board needs to be replaced, start the hydraulic lifting device to raise the hydraulic column to a suitable height, stop the hydraulic lifting device, replace the damaged insulation board, and repeat steps S1 to S3.

[0022] S5. When the iron trough needs major repair, start the hydraulic lifting device to raise the hydraulic column to the highest position. After the repair is completed, repeat steps S1 to S3.

[0023] The present invention has the following beneficial effects:

[0024] This invention relates to a visualized, energy-saving molten iron trench surface insulation device and its usage method. The addition of a hydraulic system allows for rapid raising and lowering of the device and replacement of the insulation panels. The hydraulic height design of over 2.5 meters ensures that raising the device does not interfere with ground workers' construction work on the molten iron trench, significantly reducing maintenance time for both the trench and the device. The introduction of a visualized cover facilitates observation of the insulation panel's operation and timely replacement of damaged panels. The design of the insulation panels being divided into smaller pieces reduces the workload of replacement, decreases the amount of refractory material used, and extends the refractory material's service life. Placing the insulation panels on the molten iron trench reduces the distance between the refractory material and the molten iron surface compared to existing cover systems, thus minimizing heat loss. The internal filling of the insulation panels with fibrous refractory material effectively prevents the propagation of sensible heat from the molten iron. In summary, this device features visualization, ease of operation and maintenance, and a long service life for the refractory materials. After application, heat loss from the molten iron surface is significantly reduced, the molten iron temperature is increased, and the economic benefits are substantial. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the assembly structure of a visual energy-saving molten iron trough liquid surface insulation device.

[0026] Figure 2 This is the main view of the visual cover.

[0027] Figure 3 This is a cross-sectional view of the insulation board.

[0028] In the diagram: 1-Visual cover plate, 11-Steel plate frame, 12-Glass, 13-Hydraulic positioning groove, 14-Upper suspension hook, 15-Lifting lug; 2-Suspension rod; 3-Insulation board, 31-Fireproof shell, 32-Fireproof material, 33-Lower suspension hook; 4-Hydraulic lifting device, 41-Hydraulic column, 42-Electrical hydraulic control system. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1-3 As shown, a visual energy-saving molten iron trough liquid surface insulation device and its usage method include the following embodiments.

[0031] Example 1:

[0032] This invention provides a visual energy-saving molten iron trough surface insulation device, comprising: a visual cover plate 1, a suspension rod 2, an insulation board 3, and a hydraulic lifting device 4. The visual cover plate 1 consists of a steel frame 11, glass 12, a hydraulic positioning groove 13, an upper suspension hook 14, and lifting lugs 15. The insulation board 3 consists of a refractory shell 31, refractory material 32, and a lower suspension hook 33. The hydraulic lifting device 4 consists of a hydraulic column 41 and an electro-hydraulic control system 42. The glass 12 is inlaid in the middle of the steel frame 11. Hydraulic positioning grooves 13 are provided on the lower sides of the steel frame 11. Upper suspension hooks 14 are provided on the lower side of the steel frame 11, and lifting lugs 15 are provided on the upper side. In operation, the upper end of the suspension rod 2 is fixed to the upper suspension hook 14, and the lower end is fixed to the lower suspension hook 31. Refractory material 32 fills the interior of the refractory shell 31, and lower suspension hooks 33 are provided on the upper sides of both ends of the refractory shell 31.

[0033] The steel plate frame 11 is welded from ordinary steel plates with a thickness of 2cm. The glass 12 is installed at the central axis position along the iron ditch of the steel plate frame 11.

[0034] Glass 12 is made of 2cm thick tempered laminated glass, which has both good load-bearing capacity and suitable temperature resistance. The width of glass 12 is 10cm-30cm smaller than the working width of the iron trough, and the length of glass 12 is 20cm-60cm smaller than the length of the steel plate frame 11.

[0035] The hydraulic positioning groove 13 is used to position the visual cover 1 on the hydraulic column 41 to ensure the safety of the visual cover 1 when it is raised or lowered.

[0036] The upper suspension hook 14 is the same width as the lower suspension hook 33, and its inner diameter is 0.5cm larger than that of the suspension rod 2.

[0037] Each visibility cover plate has four lifting lugs 15, evenly distributed at the four corners of the visibility cover plate 1. The lifting lugs 15 are foldable pin-type structures, which can be erected for easy unloading by the crane when in use, and folded down when not in use to reduce the impact on workers' daily work and walking.

[0038] The suspension rod 2 is made of φ2cm steel bar, is rectangular, and its inner width is 1cm larger than that of the upper suspension hook 14.

[0039] Multiple insulation boards 3 are evenly laid under a visible cover. A width of 30cm is suitable for insulation boards 3, as they are relatively lightweight and easy to replace.

[0040] The refractory shell 31 is cast from ceramic material that can withstand 1500 degrees Celsius, and the shell is 3cm thick.

[0041] The refractory material 32 is a fibrous refractory material that is filled inside the refractory shell 31, which serves both as heat insulation and reduces the weight of the insulation board 3.

[0042] The hydraulic lifting device 4 is fixed on both sides of the iron ditch channel. Each visual cover plate corresponds to one set of hydraulic lifting device, and each set of hydraulic lifting device 4 has 4 hydraulic columns 41.

[0043] When the hydraulic column 41 is lowered to its lowest position, it is 1 cm lower than the lower surface of the visual steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column, which can be raised to more than 2.5m, making it convenient for workers to maintain. The electrical hydraulic control system 42 uses an electric motor to drive the hydraulic pump.

[0044] In addition, a 0.5cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron ditch channel to prevent impact and provide sealing.

[0045] The present invention provides a method for using a visual energy-saving molten iron trough liquid surface insulation device, the specific steps of which include:

[0046] Step 1: Use a crane to place the visual cover 1 in the designated position, place the hydraulic positioning groove 13 of the visual cover 1 above the hydraulic column 41, and lower it to remove the crane hook.

[0047] Step 2: Start the lifting program of the hydraulic lifting device 4, raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper suspension hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0048] Step 3: Start the lowering procedure of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visible cover plate 1 falls to the designated position on the ground, and the insulation board falls onto the iron ditch channel.

[0049] Step 4: When a crack is observed in the insulation board 3 through the visual cover, and the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps one through three.

[0050] Step 5: When the iron trough requires major repairs, activate the hydraulic lifting device 4 to raise the hydraulic column 41 to its highest position. After the repairs are completed, repeat steps one through three.

[0051] The advantages of this embodiment are as follows: The addition of a hydraulic system allows for rapid lifting and lowering of the device and replacement of the insulation board. The hydraulic height design of over 2.5m ensures that raising the device does not interfere with ground workers' construction of the molten iron trench, significantly reducing maintenance time for both the trench and the device. The introduction of a visible cover facilitates observation of the insulation board's operation, allowing for timely replacement of damaged boards. The design of the insulation board being divided into smaller pieces reduces the workload of replacement, decreases the amount of refractory material used, and extends the refractory material's service life. Placing the insulation board on the molten iron trench reduces the distance between the refractory material and the molten iron surface compared to existing covers, thus minimizing heat loss. The internal fiber refractory filling of the insulation board effectively prevents the propagation of sensible heat from the molten iron. In summary, the device features visualization, ease of operation, ease of maintenance, and long service life of refractory materials. After application, the heat loss of molten iron surface is reduced by 20%, and the temperature of molten iron increases by 3°C. The annual economic benefit of a unit with an annual production capacity of 2 million tons of molten iron is 6 million to 9 million yuan.

[0052] Example 2:

[0053] This invention provides a visual energy-saving molten iron trough surface insulation device, comprising: a visual cover plate 1, a suspension rod 2, an insulation board 3, and a hydraulic lifting device 4. The visual cover plate 1 consists of a steel frame 11, glass 12, a hydraulic positioning groove 13, an upper suspension hook 14, and lifting lugs 15. The insulation board 3 consists of a refractory shell 31, refractory material 32, and a lower suspension hook 33. The hydraulic lifting device 4 consists of a hydraulic column 41 and an electro-hydraulic control system 42. The glass 12 is inlaid in the middle of the steel frame 11. Hydraulic positioning grooves 13 are provided on the lower sides of the steel frame 11. Upper suspension hooks 14 are provided on the lower side of the steel frame 11, and lifting lugs 15 are provided on the upper side. In operation, the upper end of the suspension rod 2 is fixed to the upper suspension hook 14, and the lower end is fixed to the lower suspension hook 31. Refractory material 32 fills the interior of the refractory shell 31, and lower suspension hooks 33 are provided on the upper sides of both ends of the refractory shell 31.

[0054] The steel plate frame 11 is welded from ordinary steel plates with a thickness of 2.5cm. The glass 12 is installed at the central axis position along the iron ditch of the steel plate frame 11.

[0055] Glass 12 is made of 2.5cm thick tempered laminated glass, which has both good load-bearing capacity and suitable temperature resistance. The width of glass 12 is less than 20cm of the working width of the iron trough, and the length is less than 40cm of the length of the iron plate frame.

[0056] The hydraulic positioning groove 13 is used to position the visual cover 1 on the hydraulic column 41 to ensure the safety of the visual cover 1 when it is raised or lowered.

[0057] The upper suspension hook 14 is the same width as the lower suspension hook 33, and its inner diameter is 0.5cm larger than that of the suspension rod 2.

[0058] Each visibility cover has four lifting lugs (15), evenly distributed at the four corners of the cover. The lifting lugs (15) are foldable pin-type structures; they can be erected for easy attachment to the crane when in use, and folded down when not in use to minimize disruption to workers' daily work and movement.

[0059] The suspension rod 2 is made of φ2.5cm steel bars, is rectangular, and its inner width is 1cm larger than that of the upper suspension hook 14.

[0060] Multiple insulation boards 3 are evenly laid under a visible cover plate. A width of 40cm is suitable for insulation boards 3, as they are relatively lightweight and easy to replace.

[0061] The refractory shell 31 is cast from ceramic material that can withstand 1500 degrees Celsius, and the shell is 7cm thick.

[0062] The refractory material 32 is a fibrous refractory material that is filled inside the refractory shell 31, which serves both as heat insulation and reduces the weight of the insulation board 3.

[0063] The hydraulic lifting device 4 is fixed on both sides of the iron ditch channel. Each visual cover plate corresponds to one set of hydraulic lifting device, and each set of hydraulic lifting device 4 has 4 hydraulic columns 41.

[0064] When the hydraulic column 41 is lowered to its lowest position, the column is 2cm lower than the lower surface of the visualization steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column, which can be raised to more than 2.5m, making it convenient for workers to maintain. The electro-hydraulic control system 42 uses an electric motor to drive the hydraulic pump.

[0065] In addition, a 1cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron trough channel to prevent impact and provide sealing.

[0066] The present invention provides a method for using a visual energy-saving molten iron trough liquid surface insulation device, the specific steps of which include:

[0067] Step 1: Use a crane to place the visual cover 1 in the designated position, place the hydraulic positioning groove 13 of the visual cover 1 above the hydraulic column 41, and lower it to remove the crane hook.

[0068] Step 2: Start the lifting program of the hydraulic lifting device 4, raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper suspension hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0069] Step 3: Start the lowering procedure of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visible cover plate 1 falls to the designated position on the ground, and the insulation board falls onto the iron ditch channel.

[0070] Step 4: When a crack is observed in the insulation board 3 through the visual cover, and the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps one through three.

[0071] Step 5: When the iron trough requires major repairs, activate the hydraulic lifting device 4 to raise the hydraulic column 41 to its highest position. After the repairs are completed, repeat steps one through three.

[0072] The advantages of this embodiment are as follows: The addition of a hydraulic system allows for rapid lifting and lowering of the device and replacement of the insulation board. The hydraulic height design of over 2.5m ensures that raising the device does not interfere with ground workers' construction of the molten iron trench, significantly reducing maintenance time for both the trench and the device. The introduction of a visible cover facilitates observation of the insulation board's operation, allowing for timely replacement of damaged boards. The design of the insulation board being divided into smaller pieces reduces the workload of replacement, decreases the amount of refractory material used, and extends the refractory material's service life. Placing the insulation board on the molten iron trench reduces the distance between the refractory material and the molten iron surface compared to existing covers, thus minimizing heat loss. The internal fiber refractory filling of the insulation board effectively prevents the propagation of sensible heat from the molten iron. In summary, the device features visualization, ease of operation, ease of maintenance, and long service life of refractory materials. After application, the heat loss of molten iron surface is reduced by 30%, and the temperature of molten iron increases by 4°C. The annual economic benefit of a unit with an annual production capacity of 2 million tons of molten iron is 8 million to 12 million yuan.

[0073] Example 3:

[0074] This invention provides a visual energy-saving molten iron trough surface insulation device, comprising: a visual cover plate 1, a suspension rod 2, an insulation board 3, and a hydraulic lifting device 4. The visual cover plate 1 consists of a steel frame 11, glass 12, a hydraulic positioning groove 13, an upper suspension hook 14, and lifting lugs 15. The insulation board 3 consists of a refractory shell 31, refractory material 32, and a lower suspension hook 33. The hydraulic lifting device 4 consists of a hydraulic column 41 and an electro-hydraulic control system 42. The glass 12 is inlaid in the middle of the steel frame 11. Hydraulic positioning grooves 13 are provided on the lower sides of the steel frame 11. Upper suspension hooks 14 are provided on the lower side of the steel frame 11, and lifting lugs 15 are provided on the upper side. In operation, the upper end of the suspension rod 2 is fixed to the upper suspension hook 14, and the lower end is fixed to the lower suspension hook 31. Refractory material 32 fills the interior of the refractory shell 31, and lower suspension hooks 33 are provided on the upper sides of both ends of the refractory shell 31.

[0075] The steel plate frame 11 is welded from ordinary steel plates with a thickness of 3cm. The glass 12 is installed at the central axis position along the iron ditch of the steel plate frame 11.

[0076] Glass 12 is made of 3cm thick tempered laminated glass, which has both good load-bearing capacity and suitable temperature resistance. The width of glass 12 is 30cm less than the working width of the iron trough, and the length is 60cm less than the length of the iron plate frame.

[0077] The hydraulic positioning groove 13 is used to position the visual cover 1 on the hydraulic column 41 to ensure the safety of the visual cover 1 when it is raised or lowered.

[0078] The upper suspension hook 14 is the same width as the lower suspension hook 33, and its inner diameter is 1 cm larger than that of the suspension rod 2.

[0079] Each visibility cover has four lifting lugs (15), evenly distributed at the four corners of the cover. The lifting lugs (15) are foldable pin-type structures; they can be erected for easy attachment to the crane when in use, and folded down when not in use to minimize disruption to workers' daily work and movement.

[0080] The suspension rod 2 is made of φ3cm steel bar, is rectangular, and its inner width is 2cm larger than that of the upper suspension hook 14.

[0081] Multiple insulation boards 3 are evenly laid under a visible cover plate. A width of 50cm is suitable for insulation boards 3, as they are relatively lightweight and easy to replace.

[0082] The refractory shell 31 is cast from ceramic material that can withstand 1500 degrees Celsius, and the shell is 10cm thick.

[0083] The refractory material 32 is a fibrous refractory material that is filled inside the refractory shell 31, which serves both as heat insulation and reduces the weight of the insulation board 3.

[0084] The hydraulic lifting device 4 is fixed on both sides of the iron ditch channel. Each visual cover plate corresponds to one set of hydraulic lifting device, and each set of hydraulic lifting device 4 has 4 hydraulic columns 41.

[0085] When the hydraulic column 41 is lowered to its lowest position, the column is 2cm lower than the lower surface of the visualization steel plate 1. The hydraulic column 41 adopts the existing four-stage lifting column, which can be raised to more than 2.5m, making it convenient for workers to maintain. The electro-hydraulic control system 42 uses an electric motor to drive the hydraulic pump.

[0086] In addition, a 1cm thick refractory material 32 is installed at the location where the insulation board 3 is placed in the iron trough channel to prevent impact and provide sealing.

[0087] The present invention provides a method for using a visual energy-saving molten iron trough liquid surface insulation device, the specific steps of which include:

[0088] Step 1: Use a crane to place the visual cover 1 in the designated position, place the hydraulic positioning groove 13 of the visual cover 1 above the hydraulic column 41, and lower it to remove the crane hook.

[0089] Step 2: Start the lifting program of the hydraulic lifting device 4, raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. Hang the upper end of the suspension rod 2 on the upper suspension hook 14, and hang the insulation board 3 on the lower end of the suspension rod 2.

[0090] Step 3: Start the lowering procedure of the hydraulic lifting device 4, lower the hydraulic column 41 to the lowest position, and stop the hydraulic lifting device 4. The visible cover plate 1 falls to the designated position on the ground, and the insulation board falls onto the iron ditch channel.

[0091] Step 4: When a crack is observed in the insulation board 3 through the visual cover, and the damaged insulation board 3 needs to be replaced, start the hydraulic lifting device 4 to raise the hydraulic column 41 to a suitable height, and then stop the hydraulic lifting device 4. After replacing the damaged insulation board 3, repeat steps one through three.

[0092] Step 5: When the iron trough requires major repairs, activate the hydraulic lifting device 4 to raise the hydraulic column 41 to its highest position. After the repairs are completed, repeat steps one through three.

[0093] The advantages of this embodiment are as follows: The addition of a hydraulic system allows for rapid lifting and lowering of the device and replacement of the insulation board. The hydraulic height design of over 2.5m ensures that raising the device does not interfere with ground workers' construction of the molten iron trench, significantly reducing maintenance time for both the trench and the device. The introduction of a visible cover facilitates observation of the insulation board's operation, allowing for timely replacement of damaged boards. The design of the insulation board being divided into smaller pieces reduces the workload of replacement, decreases the amount of refractory material used, and extends the refractory material's service life. Placing the insulation board on the molten iron trench reduces the distance between the refractory material and the molten iron surface compared to existing covers, thus minimizing heat loss. The internal fiber refractory filling of the insulation board effectively prevents the propagation of sensible heat from the molten iron. In summary, the device features visualization, ease of operation, ease of maintenance, and long service life of refractory materials. After application, the heat loss of molten iron surface is reduced by 40%, and the temperature of molten iron increases by 5°C. The annual economic benefit of a unit with an annual production capacity of 2 million tons of molten iron is 10 million to 15 million yuan.

[0094] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0095] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A visual energy-saving molten iron trough surface insulation device, characterized in that, The device includes a visual cover plate (1), a suspension rod (2), an insulation board (3), and a hydraulic lifting device (4). The visual cover plate (1) includes a steel plate frame (11), glass (12), a hydraulic positioning groove (13), and an upper suspension hook (14). The insulation board (3) includes a fire-resistant shell (31) and a lower suspension hook (33). The hydraulic lifting device (4) includes a hydraulic column (41) and an electro-hydraulic control system (42). Glass (12) is inlaid in the middle of the steel plate frame (11). The bottom of the steel plate frame (11) is provided with a hydraulic positioning groove (13). The bottom of the steel plate frame (11) is provided with an upper suspension hook (14). The upper end of the suspension rod (2) is fixed to the upper suspension hook (14) in the working state. The lower end of the suspension rod (2) is fixed to the lower suspension hook (33). The lower suspension hook (33) is installed on the top of the fire-resistant shell (31). The upper suspension hook (14) and the lower suspension hook (33) have the same width. The inner diameter of the upper suspension hook (14) and the lower suspension hook (33) is 0.5cm-1cm larger than the diameter of the suspension rod (2). The two ends of the suspension rod (2) are hooked to the upper suspension hook (14) and the lower suspension hook (33) respectively. The middle part of the suspension rod (2) is made of a rectangular structure with steel bars with a diameter of φ2cm-3cm. The inner width of the suspension rod (2) is 1cm-2cm larger than the upper suspension hook (14). The glass (12) is made of 2cm-3cm thick tempered laminated glass. The width of the glass (12) is 10cm-30cm smaller than the working width of the iron trough. The length of the glass (12) is 20cm-60cm smaller than the length of the steel plate frame (11). The top of the hydraulic column (41) is embedded in the hydraulic positioning groove (13). The hydraulic positioning groove (13) is used to position the visualization cover plate (1) on the hydraulic column (41).

2. The visual energy-saving molten iron trough surface insulation device according to claim 1, characterized in that, The steel plate frame (11) is welded from ordinary steel plates with a thickness of 2cm-3cm. The steel plate frame (11) is equipped with glass (12) at the central axis position along the iron ditch.

3. The visual energy-saving molten iron trough surface insulation device according to claim 1, characterized in that, The top of the steel plate frame (11) is provided with four lifting lugs (15). The lifting lugs (15) are evenly distributed at the four corners of the steel plate frame (11). The lifting lugs (15) are foldable and can be erected for vehicle uncoupling when in use.

4. The visual energy-saving molten iron trough surface insulation device according to claim 1, characterized in that, The insulation board (3) has multiple layers laid under the same visual cover plate (1), and the width of the insulation board (3) is 30cm~50cm.

5. The visual energy-saving molten iron trough surface insulation device according to claim 1, characterized in that, The refractory shell (31) is made of ceramic material that can withstand 1500 degrees Celsius. The refractory shell (31) is 3cm-10cm thick. The interior of the refractory shell (31) is filled with refractory material (32). The refractory material (32) is fibrous refractory material. Install 0.5cm-1cm thick refractory material (32) at the iron ditch channel where the insulation board (3) is located.

6. The visual energy-saving molten iron trough surface insulation device according to claim 1, characterized in that, The hydraulic lifting device (4) is fixed on both sides of the iron ditch channel. Each visual cover plate (1) corresponds to a set of hydraulic lifting devices (4). Each set of hydraulic lifting devices (4) has four hydraulic columns (41). When the hydraulic column (41) is lowered to the lowest position, the top of the hydraulic column (41) is 1cm-2cm lower than the lower surface of the visual cover plate (1).

7. The method of using the visual energy-saving molten iron trough surface insulation device according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Use a crane to place the visual cover plate (1) in the designated position, place the hydraulic positioning groove (13) of the visual cover plate (1) above the hydraulic column (41), and lower it to remove the crane hook. S2. Start the hydraulic lifting device (4) to raise the hydraulic column (41) to a suitable height, stop the hydraulic lifting device (4), hang the upper end of the suspension rod (2) on the upper suspension hook (14), and hang the insulation board (3) on the lower end of the suspension rod (2). S3. Start the hydraulic lifting device (4) descent program, lower the hydraulic column (41) to the lowest position, stop the hydraulic lifting device (4), the visual cover (1) falls to the designated position on the ground, and the insulation board (3) falls on the iron ditch channel. S4. When the insulation board (3) is found to be cracked through the visual cover plate (1), and the broken insulation board (3) needs to be replaced, start the hydraulic lifting device (4) to raise the hydraulic column (41) to a suitable height, stop the hydraulic lifting device (4), replace the broken insulation board (3), and repeat steps S1 to S3. S5. When the iron ditch needs major repair, start the hydraulic lifting device (4) to raise the hydraulic column (41) to the highest position. After the repair is completed, repeat steps S1 to S3.

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