Blanking chute of converter flue

Abstract

The utility model discloses a converter flue blanking chute which comprises an inclined chute body, the inner wall of the chute body is provided with a plurality of wear-resistant lining plates which are arranged in parallel along the center line of the chute body, every two adjacent rows of wear-resistant lining plates are arranged at intervals, and in the normal use process, the wear-resistant lining plates are arranged in parallel along the center line of the chute body. The space between every two adjacent rows of wear-resistant lining plates can be filled with smoke dust or particle powder to form a stable material wear-resistant layer so as to protect the inner wall of the chute body from being directly impacted by materials, so that the wear resistance and impact resistance of the inner wall of the chute body are remarkably improved, the service life of the chute body is prolonged, the replacement frequency is reduced, and the service life of the chute body is prolonged. Meanwhile, the production efficiency is improved and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, and particularly relates to a blanking chute for a converter flue. Background Art

[0002] Generally, during the smelting process of a converter, various bulk materials need to be added from a high-position silo into the converter. Therefore, a blanking port is opened on the flue above the converter, and a blanking chute is inserted into the blanking port of the converter flue to ensure that the bulk materials enter the converter through the blanking chute, thereby realizing the smooth transportation of the bulk materials into the converter.

[0003] The existing blanking chute is often affected by adverse factors such as material blanking impact and abrasion. Due to the lack of reliable wear-resistant protection, its service life is short. Therefore, it needs to be frequently shut down for replacement, which not only reduces production efficiency but also increases production costs.

[0004] In addition, there is also a problem of poor sealing performance. High-temperature flue gas often overflows during the converter blowing process, which not only pollutes the environment but also seriously affects the personal safety of the surrounding workers because the flue gas contains a large amount of carbon monoxide. Summary of the Utility Model

[0005] Therefore, to solve the above problems, the utility model provides a blanking chute for a converter flue, which can effectively improve the wear resistance and impact resistance of the inner wall of the chute body, so as to extend its service life, and at the same time improve production efficiency and reduce production costs.

[0006] To achieve the above object, the technical solution provided by the utility model is as follows:

[0007] The utility model provides a blanking chute for a converter flue, which includes a chute body arranged obliquely. A plurality of wear-resistant lining plates arranged parallel to the center line are provided on the inner wall of the chute body, and adjacent two rows of wear-resistant lining plates are arranged at intervals.

[0008] Further, the wear-resistant lining plate is a streamline multi-layer structure, and at least includes a first lining plate layer arranged on the inner wall of the chute body and a second lining plate layer arranged outside the first lining plate layer.

[0009] Further, the first lining plate layer is an ordinary steel plate layer; the second lining plate layer is a wear-resistant lining plate layer.

[0010] Further, the wear-resistant lining plates are arranged in a semi-circular shape along the radial cross-section of the chute body, and a receiving impact area corresponding to the feeding port of the chute body is formed.

[0011] Further, a first flange is provided at the discharge port of the chute body facing the converter flue, and a second flange is provided at the blanking port of the converter flue. The first flange and the second flange are connected to form a sealed fit.

[0012] Further, a sealing assembly is provided between the connecting surfaces of the first flange and the second flange. The sealing assembly includes an outer sealing ring and an inner sealing ring disposed within the outer sealing ring. The height of the outer sealing ring is greater than the height of the inner sealing ring.

[0013] Further, the sealing assembly further includes a ceramic fiber rope, and the ceramic fiber rope is filled in the gap between the outer sealing ring and the inner sealing ring.

[0014] Further, the first flange and the second flange are cooperatively connected by a loose joint bolt and a nut to form a sealed connection.

[0015] Further, the wall of the chute body includes a steel pipe layer. The steel pipe layer includes a plurality of steel pipe conduits connected by butt welding, and each steel pipe conduit is in communication with each other and is provided with a matching water inlet and a water return port to form a cooling water circuit.

[0016] Further, there is an inner gap facing the center line of the chute body and an outer gap opposite to the inner gap between two adjacent steel pipe conduits. The inner gap is filled with round steel and is subjected to wear-resistant surfacing to form a surfacing seal for the inner gap; the outer gap is sealed by surfacing and is filled with refractory coating; the outside of the steel pipe layer is wrapped with a steel plate protective layer.

[0017] Through the technical solution provided by the present utility model, the following beneficial effects are achieved:

[0018] By arranging adjacent two rows of wear-resistant liners at intervals, and during normal use, the space between adjacent two rows of wear-resistant liners will be filled with soot or granular powder materials to form a stable material wear-resistant layer, so as to protect the inner wall of the chute body from direct impact of materials, thereby significantly improving the wear resistance and impact resistance of the inner wall of the chute body, prolonging its service life and reducing the replacement frequency, while improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure shows a schematic structural diagram of the blanking chute of the converter flue in the embodiment;

[0020] Figure 2 The figure shows Figure 1 an enlarged schematic diagram of area A in

[0021] Figure 3The figure shows a schematic cross-section of the charging chute of the converter flue in the embodiment. Detailed implementation manners

[0022] To further illustrate each embodiment, the present utility model provides accompanying drawings. These drawings are part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] Now, the present utility model will be further described in conjunction with the accompanying drawings and the detailed implementation manners.

[0024] Refer to Figure 1 and Figure 3 As shown, this embodiment provides a charging chute for a converter flue, including a chute body 10 arranged obliquely. A plurality of wear-resistant linings 14 arranged parallel to its center line are provided on the inner wall of the chute body 10, and the adjacent two rows of wear-resistant linings 14 are arranged at intervals.

[0025] In this embodiment, as Figure 1 shown, an upper flange 11 is provided at the feeding port of the chute body 10 for flange connection with a high-level bin. A first flange 16 is provided at the discharging port of the chute body 10 facing the converter flue 18, and a second flange 19 is provided at the feeding port of the converter flue 18. The first flange 16 and the second flange 19 are connected to form a sealed fit, and a feeding channel connecting the chute body 10 and the converter flue 18 is formed to ensure that the entire feeding process can be completed. And the first flange 16 is provided with a rib plate 15 to ensure its structural strength and prevent deformation.

[0026] Furthermore, the flange surface of the upper flange 11 forms a 90° angle with the center line of the chute body 10, and the flange surface of the first flange 16 forms a 30° angle with the center line of the chute body 10 to form an inclined setting and ensure that the chute body 10 can discharge materials normally.

[0027] As Figure 3 shown, the width of the wear-resistant lining 14 is 30 mm, and the distance between adjacent wear-resistant linings 14 is 20 mm, and the joints are staggered to ensure the subsequent welding space. Of course, the width of the wear-resistant lining 14 and the distance between adjacent wear-resistant linings 14 can be adjusted according to the inner diameter of the chute body 10.

[0028] By setting adjacent two columns of wear-resistant liners 14 at intervals, and during normal use, the space between adjacent two columns of wear-resistant liners 14 will be filled with soot or granular powder materials to form a stable material wear-resistant layer, so as to protect the inner wall of the chute body 10 from direct impact of the materials, thereby significantly improving the wear resistance and impact resistance of the inner wall of the chute body 10, prolonging its service life and reducing the replacement frequency, while improving production efficiency and reducing production costs.

[0029] In another preferred embodiment, the wear-resistant liner 14 is a streamlined two-layer structure, and includes a first liner layer vertically installed on the inner wall of the chute body 10 and a second liner layer arranged outside the first liner layer, and the streamlined wear-resistant liner 14 can reduce the resistance when the materials flow.

[0030] More specifically, as Figure 3 shown, the wear-resistant liners 14 are arranged in a semicircle along the radial cross-section of the chute body 10, and a receiving impact area corresponding to the feeding port of the chute body 10 is formed, that is, the wear-resistant liners 14 are located within the range of 180° near the receiving impact area 180° inside the chute body 10 to prevent impact wear during the feeding process and improve the service life.

[0031] The wall body of the chute body 10 includes a steel pipe layer, and the steel pipe layer includes a plurality of steel pipe pipelines connected by butt welding. For example, the steel pipe pipelines adopt high-temperature alloy boiler steel pipes, and each steel pipe pipeline is connected and provided with a matching water inlet and a water return port, and the water inlet and the water return port are respectively installed with a water inlet pipe 13 and a water return pipe 12 to form a cooling water circuit. And there is an inner gap facing the center line of the chute body 10 and an outer gap opposite to the inner gap between adjacent two steel pipe pipelines. The inner gap is filled with round steel and is subjected to wear-resistant surfacing to form a surfacing seal for the inner gap. The outer gap is sealed by surfacing and filled with refractory paint, and the outside of the steel pipe layer is wrapped with a steel plate protective layer.

[0032] During specific implementation, after the inner gap is filled with φ10mm round steel, wear-resistant surfacing treatment is carried out to form a wear-resistant surfacing layer with a thickness of 2mm, and the welding height is not lower than the outermost extension of the steel pipe pipeline to ensure full sealing within the range of 360° of the inner cavity, and a high-temperature anti-corrosion coating is sprayed on the outer layer of the steel pipe pipeline to improve its wear resistance, abrasion resistance and corrosion resistance.

[0033] After the outer gap is sealed by surfacing, it is filled with refractory paint, and then the outermost layer is wrapped with a steel plate to form a steel plate protective layer to prevent the steel pipe pipeline from being damaged due to collision during transportation or hoisting.

[0034] Therefore, the wall body of the chute body 10 adopts a multi-layer composite structure, enabling it to effectively disperse stress while withstanding high temperature and impact, preventing local overheating and damage.

[0035] In addition, within the chute body 10, the wear-resistant lining plate 14 is assembled on the wear-resistant surfacing layer. Its total thickness is 12 mm, and the first lining plate layer uses a 6-mm-thick Q235B ordinary steel plate, while the second lining plate layer uses a 6-mm-thick high-strength wear-resistant lining plate to form a double-layer lining. This can significantly improve its wear resistance and is also easy to overhaul and maintain. When the double-layer lining is severely worn, it can be put back into use after being repaired offline, effectively saving production costs.

[0036] In another preferred embodiment, a sealing assembly is provided between the connection surfaces of the first flange 16 and the second flange 19. The sealing assembly includes an outer sealing ring and an inner sealing ring disposed within the outer sealing ring. The height of the outer sealing ring is greater than that of the inner sealing ring.

[0037] In this specific embodiment, the first flange 16 and the second flange 19 are sealed and connected by a combination of a gimbal bolt and a nut to form a connection unit 20. Among them, the gimbal bolt uses a lock-type high-strength gimbal bolt, and a gasket can also be used in a supporting manner. The gimbal bolt is fixed to the converter flue 18. Open U-shaped grooves are provided on the outer sides of the first flange 16 and the second flange 19. During installation, the gimbal bolt enters the U-shaped groove and is fastened by a nut on the side where the chute body 10 is located. Compared with the installation methods such as pin shafts or positioning pins in the prior art, the bolt connection method is adopted in this embodiment to meet the requirement of a small working space. It can also be operated by electric machinery, greatly saving time, reducing the labor intensity of workers, and improving the overall efficiency at the same time.

[0038] Specifically, both the inner and outer sealing rings are processed from 10-mm-thick steel plates and are directly welded to the surfaces of the two flanges. At this time, the height of the outer sealing ring is slightly higher than that of the inner sealing ring, which is convenient for sealing the two flange surfaces and also plays a role in installation and positioning.

[0039] Further preferably, as Figure 1 and Figure 2 shown, the sealing assembly further includes a ceramic fiber rope 17. The ceramic fiber rope 17 is filled in the gap between the outer sealing ring and the inner sealing ring. Specifically, the distance between the two sealing rings is 20 mm, and its gap is filled with the ceramic fiber rope 17, and the number of winding turns of the ceramic fiber rope 17 is ≥ 3 turns to ensure sealing and compaction.

[0040] During the working process, due to the tight seal between the first flange 16 and the second flange 19, it effectively prevents the escape of smoke and dust. Dust will only accumulate near the inner sealing ring, forming a stable and sealed multi-layer sealing structure.

[0041] Further preferably, the outside of the chute body 10 is wrapped with a heat-insulating layer to reduce heat loss and protect the operators from high-temperature injuries.

[0042] In this embodiment, by optimizing the material selection and structural design of the charging chute of the converter flue, its sealing performance, wear resistance and impact resistance are effectively improved, its service life is extended, environmental pollution is reduced, production efficiency is increased, and a multi-layer sealing structure is adopted to ensure good sealing performance, effectively avoiding the overflow of high-temperature flue gas during the steelmaking process, reducing environmental pollution and ensuring the safety around the equipment.

[0043] Furthermore, a lock-type high-strength articulated bolt is used and is used in combination with nuts and gaskets to replace the traditional pin shaft or locating pin connection and fixation. The disassembly and installation are convenient and fast, and it is not restricted by the surrounding space, significantly shortening the maintenance and replacement time caused by the damage of the chute body 10, reducing the labor intensity of workers, greatly improving the work efficiency, and the charging chute of the converter flue in this embodiment is applicable to both newly built plant facilities and the technical transformation of existing facilities.

[0044] Although the present utility model has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present utility model in terms of form and details without departing from the spirit and scope of the present utility model defined by the appended claims, and all such changes are within the protection scope of the present utility model.

Claims

1. A converter flue blanking chute, comprising a chute body arranged obliquely, characterized in that: A plurality of wear-resistant liners arranged parallel to the center line are provided on the inner wall of the chute body, and adjacent two rows of wear-resistant liners are arranged at intervals. The wear-resistant liner is a streamlined multi-layer structure and at least includes a first liner layer provided on the inner wall of the chute body and a second liner layer provided outside the first liner layer; the first liner layer is an ordinary steel plate layer; the second liner layer is a wear-resistant liner layer.

2. The charging chute of the converter flue according to claim 1, characterized in that: The wear-resistant liners are arranged in a semi-circular shape along the radial cross-section of the chute body and form a receiving impact area corresponding to the feed inlet of the chute body.

3. The converter flue blanking chute according to claim 1 or 2, characterized in that: A first flange is provided at the discharge port of the chute body facing the converter flue, and a second flange is provided at the feed port of the converter flue. The first flange and the second flange are connected to form a sealing fit.

4. The charging chute of the converter flue according to claim 3, characterized in that: A sealing component is provided between the connecting surfaces of the first flange and the second flange. The sealing component includes an outer sealing ring and an inner sealing ring provided inside the outer sealing ring. The height of the outer sealing ring is greater than the height of the inner sealing ring.

5. The charging chute for the converter flue according to claim 4, characterized in that: The sealing component further includes a ceramic fiber rope, and the ceramic fiber rope is filled in the gap between the outer sealing ring and the inner sealing ring.

6. The charging chute of the converter flue according to claim 3, characterized in that: The first flange and the second flange are cooperated with a toggle bolt and a nut to form a sealed connection.

7. The charging chute of the converter flue according to claim 1 or 2, characterized in that: The wall body of the chute body includes a steel pipe layer. The steel pipe layer includes a plurality of steel pipe conduits connected by butt welding, and each steel pipe conduit is communicated with each other and is provided with a cooperating water inlet and a water return port to form a cooling water circuit.

8. The ladle turret blanking chute according to claim 7, characterized in that: There is an inner gap facing the center line of the chute body and an outer gap opposite to the inner gap between two adjacent steel pipe conduits. The inner gap is filled with round steel and is subjected to wear-resistant surfacing to form a surfacing seal for the inner gap; the outer gap is sealed by surfacing and is filled with refractory paint; the outside of the steel pipe layer is wrapped with a steel plate protective layer.

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