An oxygen lance for an electric arc furnace

Abstract

The utility model relates to a kind of oxygen lance of electric arc furnace in the technical field of metallurgical equipment, including oxygen lance, the electric arc furnace of oxygen lance cooperation is equipped with inlet gun mouth, and inlet gun mouth is equipped with connecting ball sleeve, and adjusting ball head is rotatably connected in connecting ball sleeve, the injection end of oxygen lance is inserted into electric arc furnace after penetrating adjusting ball head, and the oxygen inlet end of oxygen lance is connected with adjusting assembly;Adjusting assembly includes support, and the guide frame is fixed on support, and the guide groove of a section arc is equipped on guide frame, and the guide groove is located on the circumference of the circle with adjusting ball head as center, and the matching slider is slidably arranged in guide groove, and the slider is connected with fixed plate, and the top of fixed plate is hingedly connected with telescopic rod one, and the fixed end of telescopic rod one is hingedly connected with the top of guide frame, and the oxygen inlet end of oxygen lance passes through the center of fixed plate.The utility model can adjust the angle of oxygen lance inserted into electric arc furnace, and the injection angle of oxygen lance can be reasonably and flexibly adjusted according to the liquid level of different height in electric arc furnace, which is conducive to improving the quality of production.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, specifically relating to an oxygen lance for an electric arc furnace. Background Technology

[0002] Currently, electric arc furnaces are widely used in the special steel smelting industry. Electric arc furnace steelmaking primarily uses oxygen lances to inject oxygen for decarburization and heating. Existing furnace wall oxygen lances are fixed to the furnace wall; once their angle and extension length into the furnace are adjusted, they cannot be adjusted during the entire furnace operation. However, because the molten steel level rises slowly during smelting, and the furnace wall oxygen lance is in a fixed position, the distance between the oxygen lance's injection end and the molten steel surface is relatively large in the early stages of smelting and relatively small in the later stages. This not only leads to wasted fuel gas and low oxygen utilization but also creates certain safety hazards and is detrimental to production. Therefore, there is an urgent need for an electric arc furnace oxygen lance to solve the above technical problems. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing an oxygen lance for an electric arc furnace, including an oxygen lance, an inlet on the electric arc furnace to which the oxygen lance is coupled, a connecting ball sleeve at the inlet, an adjusting ball head rotatably connected inside the connecting ball sleeve, the injection end of the oxygen lance penetrating the adjusting ball head and extending into the electric arc furnace, and an adjusting component connected to the oxygen inlet end of the oxygen lance.

[0004] The adjustment assembly includes a bracket, on which a guide frame is fixed. The guide frame has an arc-shaped guide groove located on the circumference of a circle centered on the adjusting ball head. A matching slider is slidably disposed within the guide groove. A fixed plate is connected to the slider located outside the guide groove. A telescopic rod is hinged to the top of the fixed plate. The fixed end of the telescopic rod is hinged to the top of the guide frame. The oxygen inlet of the oxygen gun passes through the center of the fixed plate.

[0005] It should be noted that by extending and retracting the telescopic rod, the oxygen lance can be rotated up and down around the adjusting ball head, thereby adjusting the angle of the oxygen lance injection and thus adjusting the injection range at different liquid levels in the electric arc furnace, which is beneficial to production.

[0006] Preferably, the oxygen inlet end of the oxygen lance passes through the fixed plate and is connected to a connecting block. A second telescopic rod is fixed to the fixed plate, and the telescopic end of the second telescopic rod passes through the fixed plate and is connected to the connecting block. The oxygen lance extends through an adjustable ball head. By extending and retracting the second telescopic rod, the length of the oxygen lance extending into the electric arc furnace can be adjusted, further improving the applicability of the oxygen lance.

[0007] Preferably, two guide frames are provided, one on each side of the oxygen lance. Each guide frame has a guide groove on its facing surface. A slider is provided on each side of the fixing plate, and the slider is slidably disposed within the corresponding guide groove. The two sides of the telescopic rod are hinged to the corresponding guide frames via hinge shafts. By providing two guide frames, the stability of the fixing plate during movement is further improved, making the adjustment of the oxygen lance's angle and length more efficient and stable.

[0008] Preferably, the telescopic rod is an electric push rod or a hydraulic rod.

[0009] Preferably, the second telescopic rod is an electric push rod or a hydraulic rod.

[0010] Preferably, the adjusting ball head is fitted with a removable sealing cap. The sealing cap is provided to seal the oxygen lance passage on the adjusting ball head when the oxygen lance is withdrawn from the adjusting ball head.

[0011] This invention also includes other components that enable the normal operation of an oxygen lance in an electric arc furnace, such as control components for electric push rods and hydraulic rods, which are all conventional technologies in the field. Furthermore, devices or components not limited in this invention, such as electric push rods, hydraulic rods, adjusting ball heads, connecting ball sleeves, and oxygen lances, all employ conventional technologies and equipment in the field.

[0012] Working principle: The oxygen lance's injection end penetrates the adjusting ball head and extends into the electric arc furnace. The extension and retraction of the second telescopic rod adjusts the length of the oxygen lance inside the furnace. The extension and retraction of the first telescopic rod causes the oxygen lance to rotate up and down around the adjusting ball head, adjusting the injection angle and thus the injection range at different liquid levels within the furnace, which is beneficial for production.

[0013] This invention has the following advantages: the length and angle of the oxygen lance inserted into the electric arc furnace can be adjusted, and the insertion length and injection angle of the oxygen lance can be reasonably and flexibly adjusted according to the different liquid levels in the electric arc furnace, which reduces the waste of fuel gas, improves the utilization rate of oxygen, and is beneficial to production. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of an oxygen lance for an electric arc furnace in an embodiment of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure after removing one guide frame;

[0017] Figure 3 for Figure 1 Left view of the middle guide frame;

[0018] Figure 4 For Figure 2 A diagram showing the state of the oxygen lance when tilted downwards at a certain angle.

[0019] In the diagram: 1. Electric arc furnace; 2. Oxygen lance; 3. Adjusting ball head; 4. Connecting ball sleeve; 5. Support; 6. Telescopic rod II; 7. Guide frame; 8. Connecting block; 9. Telescopic rod I; 10. Hinge shaft; 11. Slider; 12. Fixing plate; 13. Guide groove; 14. Connecting rod. Detailed Implementation

[0020] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0021] Example

[0022] like Figure 1-4 As shown, this utility model provides an oxygen lance for an electric arc furnace, including an oxygen lance 2. The electric arc furnace 1 to which the oxygen lance 2 is coupled is provided with an inlet. A connecting ball sleeve 4 is provided at the inlet. An adjusting ball head 3 is rotatably connected inside the connecting ball sleeve 4. The injection end of the oxygen lance 2 passes through the adjusting ball head 3 and extends into the electric arc furnace 1. An adjusting component is connected to the oxygen inlet end of the oxygen lance 2.

[0023] The adjustment assembly includes a bracket 5, on which a guide frame 7 is fixed. The guide frame 7 has an arc-shaped guide groove 13 located on the circumference of a circle centered on the adjusting ball head 3. A matching slider 11 is slidably disposed within the guide groove 13. A fixed plate 12 is connected to the slider 11 located outside the guide groove 13. A connecting rod 14 is hinged to the top of the fixed plate 12, and a telescopic rod 9 is hinged to the other end of the connecting rod 14. The fixed end of the telescopic rod 9 is hinged to the top of the guide frame 7. The oxygen inlet of the oxygen lance 2 passes through the center of the fixed plate 12. By extending and retracting the telescopic rod 9, the oxygen lance 2 can be rotated up and down around the adjusting ball head 3, adjusting the injection angle of the oxygen lance 2 and thus adjusting the injection range at different liquid levels within the electric arc furnace 1, which is beneficial for production.

[0024] The oxygen inlet of the oxygen lance 2 passes through the fixing plate 12 and is connected to the connecting block 8. A telescopic rod 6 is fixed on the fixing plate 12, and the telescopic end of the telescopic rod 6 passes through the fixing plate 12 and is connected to the connecting block 8. The oxygen lance 2 extends and retracts through the adjusting ball head 3. The length of the oxygen lance 2 extending into the electric arc furnace 1 can be adjusted by extending and retracting the telescopic rod 6, further improving the applicability of the oxygen lance 2.

[0025] Two guide frames 7 are provided, one on each side of the oxygen lance 2. Each guide frame 7 has a guide groove 13 on its facing surface. A slider 11 is provided on each side of the fixing plate 12, and the slider 11 is slidably disposed within the corresponding guide groove 13. The two sides of the telescopic rod 9 are hinged to the corresponding guide frames 7 via hinge shafts 10. By providing two guide frames 7, the stability of the fixing plate 12 during movement is further improved, making the angle and length adjustment of the oxygen lance 2 more efficient and stable.

[0026] The telescopic rod 9 is an electric push rod or a hydraulic rod.

[0027] The telescopic rod 6 is an electric push rod or a hydraulic rod.

[0028] The adjusting ball head 3 is fitted with a removable sealing cover. The sealing cover is designed to seal the passage of the oxygen lance 2 on the adjusting ball head 3 when the oxygen lance 2 is withdrawn from the adjusting ball head 3.

[0029] The electric push rod, hydraulic rod, oxygen lance, adjusting ball head, connecting ball sleeve, etc. involved in the above embodiments are all existing technologies. This application does not make any improvements to them, but only utilizes their existing functions. For their specific structure and principle, please refer to the product manual or existing technical data, which are all existing technologies.

[0030] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An oxygen lance for an electric arc furnace, comprising an oxygen lance, wherein the electric arc furnace to which the oxygen lance is coupled has an inlet, a connecting ball sleeve is provided at the inlet, an adjusting ball head is rotatably connected inside the connecting ball sleeve, and the injection end of the oxygen lance extends into the electric arc furnace after passing through the adjusting ball head, characterized in that: The oxygen inlet of the oxygen lance is connected to an adjustment component; The adjustment assembly includes a bracket, on which a guide frame is fixed. The guide frame has an arc-shaped guide groove located on the circumference of a circle centered on the adjusting ball head. A matching slider is slidably disposed within the guide groove. A fixed plate is connected to the slider located outside the guide groove. A telescopic rod is hinged to the top of the fixed plate. The fixed end of the telescopic rod is hinged to the top of the guide frame. The oxygen inlet of the oxygen gun passes through the center of the fixed plate.

2. The oxygen lance for an electric arc furnace according to claim 1, characterized in that: The oxygen inlet of the oxygen gun passes through the fixing plate and is connected to a connecting block. A telescopic rod 2 is fixed on the fixing plate, and the telescopic end of the telescopic rod 2 passes through the fixing plate and is connected to the connecting block.

3. The oxygen lance for an electric arc furnace according to claim 1, characterized in that: Two guide frames are provided, one on each side of the oxygen lance. Guide grooves are provided on the facing surfaces of the two guide frames. Slider blocks are provided on both sides of the fixing plate. The sliders are slidably disposed in the corresponding guide grooves. The two sides of the telescopic rod are respectively hinged to the corresponding guide frames through hinge shafts.

4. The oxygen lance for an electric arc furnace according to claim 1, characterized in that: The telescopic rod is either an electric push rod or a hydraulic rod.

5. The oxygen lance for an electric arc furnace according to claim 2, characterized in that: The second telescopic rod is either an electric push rod or a hydraulic rod.

6. The oxygen lance for an electric arc furnace according to claim 1, characterized in that: The adjusting ball head is fitted with a removable sealing cap.

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