Converter oxygen lance slag scraper

Abstract

A converter oxygen lance slag scraper is characterized in that an oxygen lance nitrogen seal is arranged on a converter platform, mechanical slag scraping units and flame cutting units are mounted on two sides of the oxygen lance nitrogen seal, and a converter oxygen lance is arranged above the converter platform; the supporting base is in bolted connection with the converter platform, the vehicle body rail is installed at the upper end of the supporting base, the hydraulic cylinder is installed at the tail end of the vehicle body rail, the output end of the hydraulic cylinder is connected with the vehicle body, the vehicle body is slidably connected to the vehicle body rail, scraping teeth are arranged below the end, close to a converter oxygen lance, of the vehicle body, and the cutting nozzle air cylinder is installed above the converter platform. And an automatic cutting torch is mounted on a transmission rod of the cutting torch cylinder. The converter oxygen lance slag scraper has the beneficial effects that the converter oxygen lance slag scraper can be used for fully automatically cleaning bonded slag in any condition, when the bonded slag on an oxygen lance is a mixture of steel and slag, the slag of the oxygen lance can still be automatically cleaned, the slag does not need to be cut off by manual flame, the cleaning efficiency of the converter oxygen lance slag scraper is ensured, and meanwhile, more manpower resources are saved.

Description

Technical Field

[0001] The utility model relates to the field of steel smelting equipment, in particular to a slag scraping device for a converter oxygen lance. Background Art

[0002] The oxygen lance is one of the key equipment of a steelmaking converter, undertaking the task of supplying oxygen to the molten bath in the converter during smelting and the task of slag splashing for furnace lining protection after tapping. Inevitably, steel slag adheres to the outer steel pipe of the oxygen lance during the blowing and slag splashing for furnace lining protection processes. If the steel slag is not removed in time, as the number of smelting heats increases, the steel slag adhering to the outer steel pipe of the oxygen lance becomes thicker and thicker. Seriously, it will make it impossible to lift the oxygen lance out of the converter nitrogen seal port. If forced to lift the lance, it will damage the converter nitrogen seal port or break the oxygen lance wire rope, forcing the operator to take extreme measures to cut off the oxygen lance from the nitrogen seal port position to replace the oxygen lance. This results in a significant reduction in the service life of the oxygen lance, increases the loss of the oxygen lance, and causes interruptions in steelmaking production at the same time.

[0003] At present, the cleaning methods of oxygen lance steel slag mainly include two types: automatic slag scraping device and manual flame cutting of adhering slag. The slag scraping principles of existing automatic slag scraping devices are similar. Usually, after the converter blowing or slag splashing for furnace lining protection is completed, when the oxygen lance is lifted out of the nitrogen seal port, a pneumatic control device is used to drive the mechanical arms on both sides, so that the cutter heads of two semi-circular slag scraping devices are closed and closely surround the surface of the oxygen lance. As the oxygen lance rises, the cutter heads of the slag scraping device begin to scrape the steel slag adhering to the oxygen lance. When the adhered slag on the oxygen lance is mainly converter slag, the converter slag is hard but brittle, and the slag scraping effect of the automatic slag scraping device is very good. However, due to the complexity of the oxygen lance operation, the adhered slag on the oxygen lance is occasionally a mixture of steel and slag, or even a layer of steel and a layer of slag. The mixture of steel and slag is not only hard but also tough and not easy to break. In this case, the existing oxygen lance slag scraping device is difficult to scrape off the steel slag adhering to the oxygen lance, and only manual flame cutting of the steel slag can be used. However, the manual flame cutting operation environment is harsh, the labor intensity is extremely high, and the efficiency is low. Generally, it requires the furnace to be stopped for cooperation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a slag scraping device for a converter oxygen lance aiming at the deficiencies and defects in the prior art. This slag scraping device for a converter oxygen lance can fully automatically clean the adhered slag in any situation. When the adhered slag on the oxygen lance is a mixture of steel and slag, it can still automatically clean the steel slag on the oxygen lance, no longer requiring manual flame cutting of the steel slag, ensuring its cleaning efficiency and saving human resources more.

[0005] To achieve the above object, the utility model adopts the following technical solutions: A slag scraping device for a converter oxygen lance, which comprises a converter oxygen lance 1, a converter platform 7, an oxygen lance nitrogen sealing port 10, a mechanical slag scraping unit, a flame cutting unit and an automatic control system: The oxygen lance nitrogen sealing port 10 is arranged on the converter platform 7, and mechanical slag scraping units and flame cutting units are installed on both sides of the oxygen lance nitrogen sealing port 10, and a converter oxygen lance 1 is arranged above the converter platform 7; The mechanical slag scraping unit includes scraping teeth 2, a vehicle body 3, a vehicle body track 4, a hydraulic cylinder 5, and a support base 6. The support base 6 is bolted to the converter platform 7. The vehicle body track 4 is installed at the upper end of the support base 6. A hydraulic cylinder 5 is installed at the end of the vehicle body track 4. The output end of the hydraulic cylinder 5 is connected to the vehicle body 3, and the vehicle body 3 is slidably connected to the vehicle body track 4. Scraping teeth 2 are arranged below one end of the vehicle body 3 close to the converter oxygen lance 1; The flame cutting unit includes a cutting nozzle cylinder 8 and an automatic cutting nozzle 9. The cutting nozzle cylinder 8 is installed above the converter platform 7, and an automatic cutting nozzle 9 is installed on the transmission rod of the cutting nozzle cylinder 8; The automatic control system includes an automatic control program, signal transmission equipment, and a PLC controller.

[0006] Further, two groups of the mechanical slag scraping unit and the flame cutting unit are provided, and they are symmetrically arranged on both sides of the converter nitrogen sealing port 10, and the flame cutting unit is located directly below the mechanical slag scraping unit.

[0007] Further, the scraping teeth 2, the vehicle body 3, the vehicle body track 4 and the support base 6 are all made of 34CrNiMo steel.

[0008] Further, one end of the vehicle body track 4 close to the converter oxygen lance 1 is connected to the side wall by a steel plate, and a hydraulic cylinder 5 is installed at the end of the vehicle body track 4 far from the converter oxygen lance 1.

[0009] Further, a rolling bearing is provided between the vehicle body 3 and the vehicle body track 4, and the vehicle body 3 is matched with the vehicle body track 4 through the rolling bearing.

[0010] Further, one end of the vehicle body 3 close to the converter oxygen lance 1 is semi-circular, and the end surface radian of the vehicle body 3 is the same as that of the converter oxygen lance 1. The width of the scraping teeth 2 is 5 cm, and the side of the scraping teeth 2 close to the converter oxygen lance 1 is inner arc-shaped, and the radian is the same as that of the oxygen lance. The outer side of the scraping teeth 2 is an inclined cone shape with a wider upper part and a narrower lower part.

[0011] Further, two vehicle bodies 3 are provided, and both vehicle bodies 3 use the hydraulic cylinder 5 as the power source.

[0012] Further, the automatic cutting nozzle 9 is semi-circular, and 2 cutting nozzles are distributed on the automatic cutting nozzle 9, and the cutting nozzles are located directly below the scraping teeth 2.

[0013] After adopting the above technical solution, the beneficial effects of the utility model are as follows: The slag scraping device of the converter oxygen lance can automatically clean the adhering slag in any situation. When the adhering slag on the oxygen lance is a mixture of steel and slag, it can still automatically clean the steel slag on the oxygen lance, eliminating the need for manual flame cutting of the steel slag. While ensuring its cleaning efficiency, it also saves human resources more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Description of the reference numerals: Converter oxygen lance 1, scraping teeth 2, vehicle body 3, vehicle body track 4, hydraulic cylinder 5, support base 6, converter platform 7, cutting nozzle cylinder 8, automatic cutting nozzle 9, converter nitrogen seal 10. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Referring to Figure 1 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a converter oxygen lance 1, a converter platform 7, an oxygen lance nitrogen seal 10, a mechanical slag scraping unit, a flame cutting unit, and an automatic control system. The oxygen lance nitrogen seal 10 is provided on the converter platform 7. Mechanical slag scraping units and flame cutting units are installed on both sides of the oxygen lance nitrogen seal 10, and a converter oxygen lance 1 is provided above the converter platform 7.

[0018] The mechanical slag scraping unit includes scraping teeth 2, a vehicle body 3, a vehicle body track 4, a hydraulic cylinder 5, and a support base 6. The support base 6 is bolted to the converter platform 7. The vehicle body track 4 is installed at the upper end of the support base 6. A hydraulic cylinder 5 is installed at the end of the vehicle body track 4. The output end of the hydraulic cylinder 5 is connected to the vehicle body 3, and the vehicle body 3 is slidably connected to the vehicle body track 4. Scraping teeth 2 are provided below one end of the vehicle body 3 close to the converter oxygen lance 1.

[0019] The flame cutting unit includes a cutting nozzle cylinder 8 and an automatic cutting nozzle 9. The cutting nozzle cylinder 8 is installed above the converter platform 7, and an automatic cutting nozzle 9 is installed on the transmission rod of the cutting nozzle cylinder 8.

[0020] The automatic control system includes an automatic control program, signal transmission equipment, and a PLC controller.

[0021] More specifically, there are two sets of the mechanical slag scraping unit and the flame cutting unit, which are symmetrically arranged on both sides of the converter nitrogen seal 10. The flame cutting unit is located directly below the mechanical slag scraping unit. The left end of the converter nitrogen seal 10 is the working position, while the right end of the converter nitrogen seal 10 is the waiting position. The two sets of mechanical slag scraping units and the flame cutting unit can effectively improve the overall working efficiency of the equipment.

[0022] More specifically, the scraping teeth 2, the vehicle body 3, the vehicle body track 4 and the support base 6 are all made of 34CrNiMo steel. 34CrNiMo has good heat resistance and wear resistance, thus extending the service life of the equipment.

[0023] More specifically, one end of the vehicle body track 4 close to the converter oxygen lance 1 is connected to the side wall through a steel plate, and a hydraulic cylinder 5 is installed at the end of the vehicle body track 4 far from the converter oxygen lance 1. This can effectively improve the stability of the track, and the hydraulic cylinder 5 can drive the vehicle body 3 to move back and forth on the vehicle body track 4.

[0024] More specifically, a rolling bearing is provided between the vehicle body 3 and the vehicle body track 4, and the vehicle body 3 is matched with the vehicle body track 4 through the rolling bearing. By adding a rolling bearing between the vehicle body 3 and the vehicle body track 4, it is convenient for the vehicle body 3 to slide automatically on the vehicle body track 4 through the rolling bearing.

[0025] More specifically, one end of the vehicle body 3 close to the converter oxygen lance 1 is semi-circular, and the end surface radian of the vehicle body 3 is the same as that of the converter oxygen lance 1. The width of the scraping teeth 2 is 5 cm, and the side of the scraping teeth 2 close to the converter oxygen lance 1 is an inner arc, and the radian is the same as that of the oxygen lance. The outside of the scraping teeth 2 is a tapered shape with a wider top and a narrower bottom. The scraping teeth 2 are conducive to slag peeling.

[0026] More specifically, there are two vehicle bodies 3, and both vehicle bodies 3 use the hydraulic cylinder 5 as the power source. When scraping slag, the hydraulic cylinder 5 drives the two vehicle bodies 3 to embrace the converter oxygen lance 1. When idle, the left and right vehicle bodies 3 are in a separated state.

[0027] More specifically, the automatic cutting nozzle 9 is semi-circular, and there are 2 cutting nozzles distributed on the automatic cutting nozzle 9, and the cutting nozzles are located directly below the scraping teeth 2.

[0028] Working principle of the utility model: Write an automatic slag scraping control system. After the converter smelting is completed and the slag splashing for furnace protection is completed, when the height of the converter oxygen lance 1 reaches h1, the mechanical slag scraping unit starts. At this time, the mechanical slag scraping unit performs mechanical slag scraping. When the converter oxygen lance 1 is lifted, the normal wire rope tension is a. When the mechanical slag scraping unit fails to remove the adhesives on the converter oxygen lance 1, resulting in an increase in the wire rope tension of the converter oxygen lance 1, when the force value reaches 2a, the lifting of the converter oxygen lance 1 stops, and then it slowly descends by 0.5 m. After the converter oxygen lance 1 descends by 0.5 m, the automatic control system starts the cutting nozzle cylinder 8 of the flame cutting unit, and the automatic cutting nozzle 9 is pushed close to the converter oxygen lance 1 through the cutting nozzle cylinder 8. The nozzle of the automatic cutting nozzle 9 automatically ignites, and the steel slag mixture adhered to the converter oxygen lance 1 is flame cut. After the automatic cutting nozzle 9 successfully ignites, the converter oxygen lance 1 starts to lift again, and the lifting speed is reduced from the original 0.6 m / s to 0.1 m / s to ensure that the flame cutting unit has enough time to cut off the mixed adhesives on the converter oxygen lance 1. The converter oxygen lance 1 continues to lift, and the scraping teeth 2 can peel off the mixed adhesives that have been flame cut from the converter oxygen lance 1, thus realizing the removal of the adhesives on the converter oxygen lance 1.

[0029] The above is only used to illustrate the technical solution of the utility model and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model shall be covered within the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A converter oxygen lance slag scraper, characterized in that: It comprises a converter oxygen lance (1), a converter platform (7), an oxygen lance nitrogen seal (10), a mechanical slag scraping unit, a flame cutting unit and an automatic control system: The oxygen lance nitrogen seal (10) is provided on the converter platform (7), and the mechanical slag scraping unit and the flame cutting unit are installed on both sides of the oxygen lance nitrogen seal (10), and a converter oxygen lance (1) is provided above the converter platform (7); The mechanical slag scraping unit includes scraping teeth (2), a vehicle body (3), a vehicle body track (4), a hydraulic cylinder (5), and a support base (6). The support base (6) is bolted to the converter platform (7). The vehicle body track (4) is installed at the upper end of the support base (6). A hydraulic cylinder (5) is installed at the end of the vehicle body track (4). The output end of the hydraulic cylinder (5) is connected to the vehicle body (3), and the vehicle body (3) is slidably connected to the vehicle body track (4). Scraping teeth (2) are provided below one end of the vehicle body (3) close to the converter oxygen lance (1); The flame cutting unit includes a cutting nozzle cylinder (8) and an automatic cutting nozzle (9). The cutting nozzle cylinder (8) is installed above the converter platform (7), and an automatic cutting nozzle (9) is installed on the transmission rod of the cutting nozzle cylinder (8); The automatic control system includes an automatic control program, signal transmission equipment, and a PLC controller.

2. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: There are two sets of the mechanical slag scraping unit and the flame cutting unit, and they are symmetrically arranged on both sides of the converter nitrogen seal (10). The flame cutting unit is located directly below the mechanical slag scraping unit.

3. The slag scraping device for the converter oxygen lance according to claim 1, characterized in that: The scraping teeth (2), the vehicle body (3), the vehicle body track (4), and the support base (6) are all made of 34CrNiMo steel.

4. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: One end of the vehicle body track (4) close to the converter oxygen lance (1) is connected to the side wall by a steel plate, and a hydraulic cylinder (5) is installed at the end of the vehicle body track (4) away from the converter oxygen lance (1).

5. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: A rolling bearing is provided between the vehicle body (3) and the vehicle body track (4), and the vehicle body (3) is matched with the vehicle body track (4) through the rolling bearing.

6. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: One end of the vehicle body (3) close to the converter oxygen lance (1) is semi-circular, and the end surface radian of the vehicle body (3) is the same as that of the converter oxygen lance (1). The width of the scraping teeth (2) is 5 cm, and the side of the scraping teeth (2) close to the converter oxygen lance (1) is inner arc-shaped, and the radian is the same as that of the oxygen lance. The outer side of the scraping teeth (2) is an inclined cone shape that is wider at the top and narrower at the bottom.

7. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: There are two vehicle bodies (3), and both vehicle bodies (3) use a hydraulic cylinder (5) as the power source.

8. The slag scraping device for a converter oxygen lance according to claim 1, characterized in that: The automatic cutting nozzle (9) is semi-circular, and 2 cutting nozzles are distributed on the automatic cutting nozzle (9), and the cutting nozzles are located directly below the scraping teeth (2).

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