Single station molten iron pretreatment system

Abstract

The utility model provides a single station molten iron pretreatment system belongs to metallurgical mechanical equipment technical field. This single station molten iron pretreatment system includes: the tipping car track, is arranged in the feeding span of steel plant, tipping car track is parallel to the cross interval level of feeding span iron wire arrangement, is movably provided with tipping car on tipping car track, the desulfurization platform is crossed in tipping car track, and tipping car track both ends extend the desulfurization platform and are equipped with the hanged jar position, is provided with feeding mechanism, mixer and the slag remover on the desulfurization platform, and the direction of the slag remover of slag remover is perpendicular to tipping car track, the slag tank car track is extended to the cinder span of steel plant from the desulfurization platform, and the slag tank car track is perpendicular to tipping car track arrangement, and the slag tank car track is movably provided with slag tank car on. The single station molten iron pretreatment system proposed by the utility model effectively solves the problem that the old steel plant cannot arrange desulfurization facilities because of the narrow and crowded space in the front span of feeding span.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical machinery and equipment technology, and in particular to a single-station molten iron pretreatment system. Background Technology

[0002] Sulfur is a harmful element in steel, and the sulfur content must be reduced to produce high-quality steel, especially steel for special purposes. Compared to desulfurization in steelmaking and refining, desulfurization through hot metal pretreatment is simpler and can effectively reduce the desulfurization burden on ironmaking and steelmaking. Therefore, hot metal pretreatment desulfurization has become a necessary step in the smelting of high-quality special steel.

[0003] KR hot metal pretreatment, short for mechanical stirring desulfurization, relies on a powerful rotating agitator to thoroughly mix the desulfurizing agent (mainly passivated magnesium particles or lime-based powder) with the molten iron, achieving deep desulfurization. The main process facilities for KR hot metal pretreatment are typically located in the desulfurization bay, one bay before the charging bay, and in the same bay as the main control building. Molten iron from the blast furnace is transported by train to the corresponding position in the charging bay, where it is lifted by the casting crane to the KR hot metal pretreatment tilting car ladle position. The tilting car moves from the charging bay to the desulfurization bay for slag removal, stirring, and other treatments. The treated molten iron is then transported back to the charging bay ladle position by the tilting car and lifted by the casting crane to the converter for molten iron collection. The slag is shoveled into a slag ladle and transported across the bay to the slag bay (one bay before the desulfurization bay) via a slag ladle car.

[0004] In the renovation of existing steel plants, conventional KR molten hot metal pretreatment equipment often cannot be installed and operated smoothly. When the original steel plant building did not reserve space for molten hot metal pretreatment facilities during the initial construction, the span before the charging span is usually the converter main control building, which is too narrow and cramped to accommodate the equipment. If a separate plant building is to be constructed, and an additional bridge crane is added for equipment maintenance, these space and economic factors often limit the use of conventional KR molten hot metal pretreatment layout methods.

[0005] In view of this, based on years of experience in production design in this and related fields, the inventor has designed a single-station molten iron pretreatment system through repeated experiments in order to solve the problems existing in the prior art. Utility Model Content

[0006] The purpose of this utility model is to provide a single-station molten iron pretreatment system that can be arranged in the feeding bay of an existing steelmaking plant.

[0007] To achieve the above objectives, this utility model proposes a single-station molten iron pretreatment system, wherein the single-station molten iron pretreatment system comprises:

[0008] A tilting car track is arranged in the feeding span of the steelmaking plant. The tilting car track is set parallel to the horizontal iron inlet line between the spans of the feeding span. A tilting car is movably mounted on the tilting car track.

[0009] A desulfurization platform is straddling the tilting car track. The desulfurization platform extends from both ends of the tilting car track and is equipped with a hanging tank position. The desulfurization platform is equipped with a feeding mechanism, a mixer and a slag remover. The slag removal direction of the slag remover is perpendicular to the tilting car track.

[0010] The slag tank car track extends from the slag removal position under the desulfurization platform to the slag span of the steelmaking plant. The slag tank car track is set perpendicular to the tipper car track, and slag tank cars are movably mounted on the slag tank car track.

[0011] The single-station molten iron pretreatment system described above further includes a feeding crane, which is used to lift the molten iron ladle to the ladle position.

[0012] The single-station molten iron pretreatment system described above further includes a temperature sampling device, which is installed on the desulfurization platform and used to sample the temperature of the molten steel in the ladle.

[0013] In the single-station molten iron pretreatment system described above, the tilting car track is arranged in the ladle turnover area of ​​the feeding span.

[0014] In the single-station molten iron pretreatment system described above, the slag remover is on the same side of the converter as the charging bay.

[0015] In the single-station molten iron pretreatment system described above, the desulfurization platform is provided with five layers from bottom to top, and the slag remover is located on the bottommost first layer platform.

[0016] In the single-station molten iron pretreatment system described above, the mixer is located directly above the tilting car track. The mixer includes a mixing head and a mixing lifting device. The mixing lifting device drives the mixing head to move up and down. The mixing lifting device is located on the second to fifth platform.

[0017] In the single-station molten iron pretreatment system described above, the mixer further includes a mixing head replacement vehicle, which is located on the second-level platform.

[0018] In the single-station molten iron pretreatment system described above, the desulfurization platform is also equipped with a dust removal pipe, and the dust removal pipe and the feeding mechanism are located on opposite sides of the mixer.

[0019] In the single-station molten iron pretreatment system described above, a ladle hoisting channel is provided between the desulfurization platform and the steelmaking plant's columns.

[0020] Compared with the prior art, the present invention has the following features and advantages:

[0021] This invention proposes a single-station molten iron pretreatment system, which effectively solves the problem of limited space and congestion in the main control building area of ​​old steel plants, making it impossible to install conventional KR desulfurization facilities. The system successfully integrates the entire pretreatment system compactly within the existing charging area, completely avoiding the huge investment and site occupation associated with building a new independent desulfurization plant and supporting maintenance cranes. Simultaneously, during the molten iron treatment process, slag removal, stirring, and temperature sampling are efficiently and continuously completed at the same station, significantly shortening the processing cycle, improving efficiency, and ensuring smooth and non-interfering slag treatment and molten iron transportation logistics. This simplifies the overall operation process and provides a reliable guarantee for achieving economical and efficient molten iron desulfurization and producing high-quality steel in the renovation of old plants with limited space and economic conditions. Attached Figure Description

[0022] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0023] Figure 1 This is a schematic diagram of the process layout of this utility model;

[0024] Figure 2 This is a cross-sectional view of the present invention (AA section).

[0025] Figure 3 This is a cross-sectional view of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Tilting car track; 2. Tilting car;

[0028] 3. Molten iron ladle; 4. Feeding mechanism;

[0029] 5. Mixer; 6. Winch;

[0030] 7. Dust collection pipeline; 8. Slag tanker truck;

[0031] 9. Slag container; 10. Slag container car track;

[0032] 11. Mixing head replacement vehicle; 12. Slag remover;

[0033] 13. Temperature sampling device; 14. Stirring head;

[0034] 15. Desulfurization platform; 16. Hoisting tank position;

[0035] 21. Converter span; 22. Charging span;

[0036] 23. Slag Chamber; 24. Converter Main Control Building;

[0037] 25. Converter platform; 26. Slag treatment facilities;

[0038] 27. Converter; 100. Single-station molten iron pretreatment system. Detailed Implementation

[0039] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are for illustrative purposes only and should not be construed as limiting the utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model.

[0040] Unless otherwise defined, the directions such as up, down, left, and right mentioned in this document refer to those shown in this utility model. Figure 1 The directions of up, down, left, and right are used as a reference, and will be explained here.

[0041] like Figures 1 to 3 As shown, this utility model proposes a single-station molten iron pretreatment system 100, which includes:

[0042] Tilting car track 1 is arranged in the feeding span 22 of the steelmaking plant. The tilting car track 1 is set parallel to the horizontal iron inlet line between the spans of the feeding span 22. A tilting car 2 is movably installed on the tilting car track 1. The tilting car 2 is used to transport molten steel ladle 3.

[0043] The desulfurization platform 15 is straddling the tilting car track 1. The desulfurization platform 15 extends from both ends of the tilting car track 1 and is provided with a hanging tank position 16. The desulfurization platform 15 is provided with a feeding mechanism 4, a mixer 5 and a slag remover 12. The slag removal direction of the slag remover 12 is perpendicular to the tilting car track 1.

[0044] The slag tank car track 10 extends from the slag removal position under the desulfurization platform 15 to the slag span 23 of the steelmaking plant. The slag tank car track 10 is set perpendicular to the tipper car track 1, and a slag tank car 8 is movably mounted on the slag tank car track 10.

[0045] The single-station molten iron pretreatment system 100 proposed in this utility model, by arranging the tilting car track 1 parallel to the molten iron turnover area of ​​the charging span 22, and the slag ladle car track 10 perpendicularly intersecting the tilting car track 1 and extending to the slag span 23, can be directly integrated into the charging span 22 of the existing steelmaking plant. This effectively overcomes the problem of not being able to arrange KR facilities due to the limited space in the span before the charging span 22, and completely avoids the need to build a new independent desulfurization plant and supporting maintenance cranes. At the same time, the perpendicular intersection design of the tilting car track 1 and the slag ladle car track 10 ensures that the horizontal movement of the molten iron ladle 3 between the ladle position and the desulfurization platform via the tilting car 2, and the smooth and non-interfering logistics path of the slag ladle car 8 transporting slag to the slag span, meet the core process requirements.

[0046] In an alternative embodiment, the slag car 8 reciprocates along the slag car track 10 so that the slag jar 9 moves from the slag span 23 to the feeding span 22.

[0047] In an optional implementation, the single-station molten iron pretreatment system 100 also includes a feeding span crane for lifting the molten iron ladle 3 to the ladle position.

[0048] Specifically, such as Figure 2 As shown, the charging crane is used for lifting and transporting molten iron ladle 3 between the molten iron transport line and the ladle position 16, and between the ladle position 16 and the converter platform 25 after processing. Specifically, the charging crane lifts the molten iron ladle 3 and moves it to a ladle position 16 for molten iron pretreatment; after molten iron pretreatment, the molten iron ladle 3 is transported to another ladle position 16, and the charging crane then lifts the molten iron ladle 3 from the other ladle position 16.

[0049] In an optional example of this utility model, such as Figure 1 , Figure 3 As shown, the tilting car track 1 includes a stirring position 17 and two lifting positions 16. The stirring position 17 is located directly below the desulfurization platform 15, and the two lifting positions 16 are located on the left and right sides of the desulfurization platform 15, respectively. In an optional example, the molten iron ladle 3 waits for pretreatment on the lifting position 16 on the right side of the desulfurization platform 15, and then moves to the stirring position 17 below the desulfurization platform 15 for pretreatment. After pretreatment, the molten iron ladle 3 is moved to the lifting position 16 on the left side of the desulfurization platform to wait for hoisting.

[0050] In an alternative embodiment of this implementation, the single-station molten iron pretreatment system 100 further includes a temperature sampling device 13, which is installed on the desulfurization platform 15 and used to sample the temperature of the molten steel in the molten iron ladle 3.

[0051] The temperature measuring and sampling device 13 is installed on the desulfurization platform to measure the temperature of the molten iron in the ladle 3 and collect samples. Specifically, after the ladle 3 moves to the stirring position 17 (before slag removal), the temperature measuring and sampling device 13 descends to perform the first temperature measurement and sampling operation. After the operation is completed, its double-gun structure is retracted. After the desulfurization and stirring treatment is completed and the slag is removed again, the ladle 3 returns to the upright position, and the temperature measuring and sampling device 13 descends again to perform the second temperature measurement and sampling operation to confirm the treatment effect. After the operation is completed, the double guns are retracted.

[0052] In an optional embodiment, the tilting car track 1 is arranged in the ladle turnover area of ​​the charging span. Preferably, the tilting car track 1 is located between lines 4 and 5 of the charging span. The tilting car track 1 is set parallel to the horizontal iron inlet line of the charging span 22, extending from the right side to the left side of the desulfurization platform 15. The ladle turnover area is the original space in the charging span 22 used for hoisting, temporarily storing, and turnover of the molten iron ladle 3. Through the tilting car track 1, the tilting car 2 can move laterally within the ladle turnover area, driving the molten iron ladle 3 to move between the two ladle positions 16 and the stirring position 17, realizing the integrated arrangement of the molten iron pretreatment process within the charging span 22.

[0053] In an alternative implementation, the slag remover 12 is on the same side as the converter 27 of the feeding bay 22.

[0054] Specifically, such as Figure 3 As shown, the slag remover 12 is installed on the first layer platform of the desulfurization platform 15 and located in column B of the charging span 22, on the same side as the converter 27 within the charging span 22 (i.e., arranged on the same side). During operation, when the molten iron ladle 3 is transported to the stirring position 17 (i.e., the slag removal position) by the tilting car 2 and tilted towards the slag remover 12, the slag remover 12 can remove the blast furnace slag and desulfurization slag from the molten iron ladle 3. The removed slag falls into the slag pot 9 below, realizing the slag removal operation in the molten iron pretreatment process.

[0055] In one alternative embodiment, the desulfurization platform 15 is provided with five platforms from bottom to top, and the slag remover 12 is located on the first platform at the bottom. This position allows the slag remover 12 to approach and operate the molten iron ladle 3 located below it, which is carried and tilted by the tilting car 2, in order to perform slag removal operations.

[0056] In one alternative embodiment, the mixer 5 is located directly above the tilting car track 1. The mixer 5 includes a mixing head 14 and a mixing lifting device. The mixing lifting device drives the mixing head 14 to move up and down. The mixing lifting device is located on the second to fifth platforms of the desulfurization platform 15.

[0057] Specifically, when the molten iron ladle 3 is moved from the tilting car 2 to the stirring position 17 and is in a horizontal state, the stirring lifting device drives the stirring head 14 to descend, immersing it in the molten iron in the ladle 3 for stirring and desulfurization treatment; after the treatment is completed, the stirring lifting device drives the stirring head 14 to rise and leave the molten iron ladle 3. This arrangement of the mixer 5 makes full use of the vertical space of the desulfurization platform, allowing the stirring process and the working area of ​​the slag remover 12 below to be set up in a vertical layer, avoiding equipment interference, and enabling three-dimensional coordinated operation of slag removal, stirring and other processes in a single workstation.

[0058] In one alternative embodiment of this implementation, after the slag hopper 9 is full, the slag hopper car 8 moves the slag hopper 9 from the feeding span 22 to the slag span 23, and then lifts it to the slag treatment facility by the existing crane in the slag span 23.

[0059] In an optional example, the molten iron ladle 3 is returned to its upright position by the tilting car 2, the stirring head 14 is lowered into position, the feeding mechanism 4 is lowered into position, stirring and feeding are performed, and after the processing is completed, the stirring head 14 is lifted by the stirring lifting device.

[0060] In one optional example, the stirring lifting device is a winch 6.

[0061] In an optional example, the mixer 5 also includes a mixing head replacement cart 11, located on the second-level platform, for performing the replacement operation of the mixing head 14, and adopting an upward replacement method for the mixing head 14. When the mixing head 14 needs maintenance or replacement, the operator can disassemble and install the mixing head 14 on the second-level platform using the mixing head replacement cart 11. Utilizing the vertical space layout of the platform, the replacement process of the mixing head 14 can be completed on the second-level platform without moving the equipment to other areas, ensuring that the replacement process does not interfere with other processes of molten iron pretreatment in terms of space.

[0062] In an optional example, the desulfurization platform 15 is also equipped with a dust removal pipe 7. The dust removal pipe 7 and the feeding mechanism 4 are located on opposite sides of the mixer 5. The feeding mechanism 4 is used to add desulfurizing agent into the molten iron ladle 3, while the dust removal pipe 7 is used to collect dust generated during the mixing process. When the mixer 5 is working, the feeding mechanism 4 descends from one side to above the molten iron ladle 3 to perform the feeding operation, while the dust removal pipe 7 adsorbs dust from the other side of the working area. The two are arranged symmetrically with the mixer 5 as the center, realizing the synchronous operation of the feeding and dust removal processes.

[0063] In an alternative implementation, a ladle hoisting channel is provided between the desulfurization platform 15 and the steelmaking plant's columns.

[0064] Furthermore, the ladle hoisting channel is located between the desulfurization platform 15 and the C-column of the steelmaking plant, parallel to the molten iron transport route of the charging span 22. When the molten iron does not require KR desulfurization treatment, the crane in the charging span can directly hoist the ladle from the molten iron line to the converter for molten iron collection along this ladle hoisting channel, without needing to go through the processing of the desulfurization platform 15, thus achieving flexible switching of the molten iron transport path.

[0065] Please refer to Figures 1 to 3 The specific process flow of the single-station molten iron pretreatment system 100 proposed in this utility model will now be described in detail with reference to an embodiment.

[0066] 1. The slag car 8 moves along the slag car track 10 from the slag span 23 to the slag removal position at the feeding span 22;

[0067] 2. Use a feeding crane to lift the molten iron ladle 3 from the molten iron line to the hoisting position 16 on the right side of the desulfurization platform 15;

[0068] 3. The iron ladle 3 is horizontally moved to the mixing position 17 by the tilting car 2;

[0069] 4. The temperature sampling device 13 descends to measure temperature and take samples, and is then retrieved after completion;

[0070] 5. The molten iron ladle 3 is tilted towards the slag remover 12 via the tipping car 2, and the slag remover 12 removes the blast furnace slag into the slag pot 9;

[0071] 6. The molten iron ladle 3 is returned to its upright position by the tilting car 2, the stirring head 14 is lowered to the position, the feeding mechanism 4 is lowered to the position, stirring and feeding are carried out, and after the processing is completed, the stirring head 14 is lifted by the winch 6.

[0072] 7. The molten iron ladle 3 is tilted towards the slag remover 12 via the tipper car 2, and the slag remover 12 removes the desulfurization slag into the slag pot 9;

[0073] 8. The molten iron ladle 3 is returned to its upright position via the tilting car 2, and the temperature measuring and sampling device 13 is lowered to perform secondary temperature measurement and sampling. After completion, it is retrieved.

[0074] 9. The molten iron ladle 3 is horizontally moved by the tilting car 2 to another hoisting position 16 on the left side of the desulfurization platform 15, and the molten iron ladle 3 is hoisted to the converter 27 by the feeding span casting crane to collect iron.

[0075] 10. After the slag hopper 9 is full, the slag truck 8 moves the slag hopper 9 from the feeding bay 22 to the slag bay 23, and then uses the existing crane in the slag bay 23 to lift it to the slag treatment facility.

[0076] The detailed explanations of the above embodiments are intended only to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions should not be construed as limiting the present invention for any reason. In particular, the various features described in different embodiments can be arbitrarily combined with each other to form other embodiments. Unless there is an explicit description to the contrary, these features should be understood to be applicable to any embodiment, and not limited to the described embodiments.

Claims

1. A single-station molten iron pretreatment system, characterized in that, The single-station molten iron pretreatment system includes: A tilting car track is arranged in the feeding span of the steelmaking plant. The tilting car track is set parallel to the horizontal iron inlet line between the spans of the feeding span. A tilting car is movably mounted on the tilting car track. A desulfurization platform is straddling the tilting car track. The desulfurization platform extends from both ends of the tilting car track and is equipped with a hanging tank position. The desulfurization platform is equipped with a feeding mechanism, a mixer and a slag remover. The slag removal direction of the slag remover is perpendicular to the tilting car track. The slag tank car track extends from the slag removal position under the desulfurization platform to the slag span of the steelmaking plant. The slag tank car track is set perpendicular to the tipper car track, and slag tank cars are movably mounted on the slag tank car track.

2. The single-station molten iron pretreatment system as described in claim 1, characterized in that, The single-station molten iron pretreatment system also includes a feeding crane, which is used to lift the molten iron ladle to the ladle position.

3. The single-station molten iron pretreatment system as described in claim 2, characterized in that, The single-station molten iron pretreatment system also includes a temperature measurement and sampling device, which is installed on the desulfurization platform and measures the temperature of the molten steel in the molten iron ladle.

4. The single-station molten iron pretreatment system as described in claim 1, characterized in that, The tilting car track is arranged in the ladle turnover area of ​​the feeding span.

5. The single-station molten iron pretreatment system as described in claim 1, characterized in that, The slag remover is on the same side of the converter as the feeding bay.

6. The single-station molten iron pretreatment system as described in claim 1, characterized in that, The desulfurization platform consists of five layers from bottom to top, with the slag remover located on the bottommost first layer.

7. The single-station molten iron pretreatment system as described in claim 6, characterized in that, The mixer is located directly above the tilting car track. The mixer includes a mixing head and a mixing lifting device. The mixing lifting device drives the mixing head to move up and down. The mixing lifting device is located on the second to fifth platform.

8. The single-station molten iron pretreatment system as described in claim 7, characterized in that, The mixer also includes a mixing head replacement vehicle, which is located on the second-level platform.

9. The single-station molten iron pretreatment system as described in claim 7, characterized in that, The desulfurization platform is also equipped with a dust removal pipe, and the dust removal pipe and the feeding mechanism are located on opposite sides of the mixer.

10. The single-station molten iron pretreatment system as described in claim 1, characterized in that, A ladle hoisting channel is provided between the desulfurization platform and the steelmaking plant's columns.

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