Slag stopping device of steelmaking converter

Abstract

The utility model belongs to accessory equipment of a steelmaking converter, and particularly relates to a slag stopping device of the steelmaking converter. The steel slag blocking device can block steel slag of the converter, prevents the steel slag from splashing to the periphery to influence normal operation of peripheral equipment, and can facilitate manual cleaning. Slag stopping units are arranged on the two sides of the converter respectively. The two slag stopping units are the same in structure, each slag stopping unit comprises an installation stand column, a shear fork set is installed on the side, facing the converter, of the installation stand column, and the shear fork set is driven by a first hydraulic cylinder to be horizontally unfolded so as to control the movable end to stretch out or retract back; and a turning plate angle adjusting mechanism is mounted at the movable end and is used for adjusting the turning angle of the turning plate so as to realize slag stopping protection of the converter.

Description

Technical Field

[0001] This utility model pertains to auxiliary equipment for steelmaking converters, and particularly relates to a slag-blocking device for steelmaking converters. Background Technology

[0002] In the converter smelting process, blowing is a key process. Its main objective is to introduce high-purity oxygen into the molten iron in the converter, causing oxidation reactions of elements such as carbon, silicon, and manganese, thereby reducing the content of these elements and ultimately transforming the molten iron into steel that meets quality requirements. The converter, as the core equipment of this process, provides the necessary reaction environment for the blowing process.

[0003] However, in practice, the blowing process presents numerous problems due to its intense reactions. For example, operator errors or the influence of specific materials can easily trigger severe splashing, causing converter slag to spray out of the furnace mouth and resulting in a large accumulation of slag around the furnace tracks. Currently, the common method for dealing with the high-temperature molten slag sprayed outside the furnace is to periodically remove and clean it manually. The purpose of this cleaning method is to ensure the normal operation of the ladle car and slag car on the tracks, while also ensuring the smooth cleaning of the slag pit below the furnace.

[0004] However, manual cleaning has significant limitations. First, the high-temperature molten slag has a high temperature and certain chemical reactivity, which can corrode and physically damage the ladle steelmaking cars, slag cars, and tracks under the furnace, threatening the normal operation and service life of the equipment. Second, the need for frequent manual cleaning of slag residue on both sides of the tracks results in a huge labor input, increasing production costs. Furthermore, this manual operation mode is inconvenient and difficult to perform. In addition, this manual cleaning method is inefficient, seriously affecting the overall production efficiency of the converter smelting process. More importantly, the manual cleaning of high-temperature molten slag poses significant safety hazards, easily leading to accidents and posing potential risks to the lives of on-site personnel and the normal production of the enterprise. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a slag-blocking device for steelmaking converters. It effectively blocks slag from splashing onto surrounding equipment, preventing it from affecting normal operation, and also allows for easy manual cleaning.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a slag-blocking device for a steelmaking converter, wherein a slag-blocking unit is provided on each side of the converter; the two slag-blocking units have the same structure, and each slag-blocking unit includes a mounting column, on which a scissor fork assembly is installed on the side facing the converter. The scissor fork assembly is driven by a hydraulic cylinder to horizontally extend, thereby controlling the extension or retraction of the movable end; a flip-plate angle adjustment mechanism is installed on the movable end, which is used to adjust the flip angle of the flip plate to achieve slag-blocking protection of the converter.

[0007] Furthermore, the two slag-blocking units are set as mirror images of the central axis of the converter.

[0008] Furthermore, the flip plate is equipped with an insulating cotton board.

[0009] Furthermore, the scissor fork assembly includes a base plate mounted on the top of the mounting column. Two sets of connecting rods are mounted on the base plate, and a movable plate is mounted on the top of each set of connecting rods, serving as the movable end. Each set of connecting rods includes two cross-connected connecting rods. The middle portion of the first connecting rod is hinged to the middle portion of the second connecting rod via a pivot, forming an X-shaped cross structure. The first end of the first connecting rod is hinged to the base plate, and the second end of the first connecting rod is hinged to the movable plate. The first end of the second connecting rod is slidably connected to the base plate, and the second end of the second connecting rod is slidably connected to the movable plate. A movable shaft is provided between the first ends of the second connecting rods in the two sets of connecting rods, and this movable shaft is hinged to the second connecting rods on both sides of it. A hydraulic cylinder is mounted on the base plate as a driving element. The piston rod of the hydraulic cylinder is hinged to the middle of the movable shaft, and its extension and retraction control the opening and closing movements of the scissor fork assembly.

[0010] Furthermore, a fixed shaft is provided between the first ends of the first link of the two sets of links, and the fixed shaft is hinged to the first links on both sides of it; providing a stable support point for the scissor fork assembly.

[0011] Furthermore, a guide groove is provided on the base plate, and a guide wheel is rotatably provided on the first end of the second connecting rod. The guide wheel moves within the guide groove, completing the sliding connection between the first end of the second connecting rod and the base plate.

[0012] Furthermore, a guide groove is provided on the moving plate, and a guide wheel is rotatably provided on the second end of the second connecting rod. The guide wheel travels within the guide groove, thus completing the sliding connection between the second end of the second connecting rod and the moving plate.

[0013] Furthermore, the flip-plate angle adjustment mechanism includes a frame mounted on the movable plate, the frame being rotatably connected to the end of the flip-plate via a rotating shaft, and one side of the flip-plate being connected to the frame via a support arm; the first end of the support arm is hinged to the flip-plate, and the second end of the support arm is slidably connected to the frame.

[0014] Furthermore, the frame is provided with a sliding groove, and a slider is slidably disposed in the sliding groove. The slider is hinged to the second end of the support arm by a pin.

[0015] Furthermore, a second hydraulic cylinder is installed inside the chute, and the piston rod of the second hydraulic cylinder is connected to the slider.

[0016] Compared with the prior art, this utility model has the following advantages.

[0017] This utility model relates to a slag-blocking device for steelmaking converters, installed at the converter blowing position. The device employs a retractable slag-blocking unit on each side of the converter, effectively blocking slag. Each unit can freely extend and retract, and can be withdrawn after slag blocking is complete. Furthermore, the device's flap is equipped with heat-insulating cotton boards for easy replacement after prolonged slag adhesion. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0019] Figure 1 This is a front view of a slag-blocking device for a steelmaking converter.

[0020] Figure 2 This is a front view of the slag-blocking unit of a slag-blocking device for a steelmaking converter.

[0021] Figure 3 A 3D view of the slag-blocking unit of a steelmaking converter slag-blocking device. Figure 1 .

[0022] Figure 4 A 3D view of the slag-blocking unit of a steelmaking converter slag-blocking device. Figure 2 .

[0023] Figure 5 A 3D view of the slag-blocking unit of a steelmaking converter slag-blocking device. Figure 3 .

[0024] Figure 6 This is a three-dimensional view of the flap of a slag-blocking device in a steelmaking converter.

[0025] In the diagram: 1. Ladle car; 2. Converter; 3. Slag pit; 4. Slag-blocking unit; 401. Mounting column; 402. Base plate; 403. Scissor fork assembly; 404. Fixed shaft; 405. Moving plate; 406. Flip plate; 407. Support arm; 408. Pin shaft two; 409. Hydraulic cylinder one; 410. Moving shaft; 411. Guide shaft one; 412. Guide wheel one; 413. Guide wheel two; 414. Guide groove two; 415. Insulation cotton board; 416. Rotating shaft; 417. Hydraulic cylinder two; 418. Pin shaft one; 419. Sliding block; 420. Slide groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0027] like Figure 1-6 As shown in the specific embodiment: In steelmaking converter production, a slag-blocking device is designed to effectively block molten slag and protect surrounding equipment from high temperatures and splashes. This device is suitable for large converters, with a slag-blocking unit 4 set on each side of the converter. These two slag-blocking units are arranged in a mirror-symmetrical manner about the central axis of the converter, ensuring operational balance and safety. The two slag-blocking units 4 have the same structure, each including a mounting column 401. The mounting column 401 is made of high-strength steel, capable of withstanding huge mechanical stress and possessing good heat resistance. A scissor fork assembly 403 is installed on the side of the mounting column 401 facing the converter. This scissor fork assembly 403 is driven horizontally by a hydraulic cylinder 409 to control the extension or retraction of the movable end. This design not only saves space but also allows the slag-blocking unit to quickly respond to the converter's operational needs. A flip-plate angle adjustment mechanism is installed on the movable end, which is used to adjust the flip angle of the flip plate 406 to achieve converter slag-blocking protection.

[0028] Example 1: The flap 406 is equipped with an insulating cotton plate 415 to protect the slag-blocking unit from high temperatures and facilitate replacement after prolonged slag adhesion. Specifically, during the steelmaking process, the temperature inside the converter is extremely high, and the slag-blocking device operates in a high-temperature environment. The insulating cotton plate can effectively block heat conduction to the metal structure and other components of the slag-blocking unit, reducing the risk of material performance degradation or damage caused by high temperatures.

[0029] Example 2: The scissor fork assembly 403 includes a base plate 402 mounted on the top of the mounting column 401. Two sets of connecting rods are mounted on the base plate 402, and a movable plate 405 is mounted on the top of each set of connecting rods, serving as the movable end. Each set of connecting rods includes two cross-connected connecting rods. The middle part of the first connecting rod is hinged to the middle part of the second connecting rod via a pivot, forming an X-shaped cross structure. The first end of the first connecting rod is hinged to the base plate 402, and the second end of the first connecting rod is hinged to the movable plate 405. The first end of the second connecting rod is slidably connected to the base plate 402, and the second end of the second connecting rod is slidably connected to the movable plate 405. A movable shaft 410 is provided between the first ends of the second connecting rods in the two sets of connecting rods, and this movable shaft 410 is hinged to the second connecting rods on both sides. A hydraulic cylinder 409 is mounted on the base plate 402 as a driving element. The piston rod of the hydraulic cylinder 409 is hinged to the middle of the movable shaft 410, and its extension and retraction control the opening and closing movements of the scissor fork assembly.

[0030] A fixed shaft 404 is provided between the first ends of the first connecting rods in the two sets of connecting rods. The fixed shaft 404 is hinged to the first connecting rods on both sides, providing a stable support point for the scissor fork assembly. Additionally, a guide groove 411 is provided on the base plate 402. A guide wheel 412 is rotatably mounted on the first end of the second connecting rod, and the guide wheel 412 travels within the guide groove 411, completing the sliding connection between the first end of the second connecting rod and the base plate 402. A guide groove 414 is provided on the moving plate 405. A guide wheel 413 is rotatably mounted on the second end of the second connecting rod, and the guide wheel 413 travels within the guide groove 414, completing the sliding connection between the second end of the second connecting rod and the moving plate 405.

[0031] Example 3: The flip-plate angle adjustment mechanism includes a frame 421 mounted on a movable plate 405. The frame 421 serves as the basic support structure for the flip-plate angle adjustment mechanism, providing an installation platform for other components and ensuring the entire system is stably fixed on the movable plate 405. The frame 421 is rotatably connected to the end of the flip-plate 406 via a pivot 416. One side of the flip-plate 406 is connected to the frame 421 via a support arm 407. The first end of the support arm 407 is hinged to the flip-plate 406, and the second end of the support arm 407 is slidably connected to the frame. A groove 420 is provided on the frame 421, and a slider 419 is slidably mounted within the groove 420. The slider 419 is hinged to the second end of the support arm 407 via a pin 418. A hydraulic cylinder 417 is installed within the groove 420, and the piston rod of the hydraulic cylinder 417 is connected to the slider 419. The hydraulic cylinder drives the slider to reciprocate linearly within the slide groove. The slider drives the support arm to move via the connecting pin. The reciprocating motion of one end of the support arm achieves the change of the tilt angle of the flap.

[0032] The usage process of this utility model is described in conjunction with the accompanying drawings and technical solutions:

[0033] 1. When a converter needs to be blown, the converter is stopped in the blowing position, and the oxygen lance is inserted into the converter. The oxygen lance blows high-purity oxygen into the molten iron. During the oxygen lance blowing process, the molten steel in the converter undergoes a violent reaction, causing slag to be ejected from the converter opening from time to time. At this time, we install slag-blocking units on both sides of the converter blowing position. The slag-blocking units are installed at a certain distance on both sides of the ladle car's running track, so as not to affect the normal operation of the ladle car.

[0034] 2. Before the blowing begins, prepare the slag-blocking unit in place. First, the hydraulic cylinder is activated, causing the hydraulic rod to retract, which in turn activates the scissor fork assembly. The scissor fork assembly then drives the moving plate to extend a certain distance.

[0035] 3. After the moving plate extends to the appropriate blasting position, the second hydraulic cylinder extends and supports the flap to rotate at a certain angle, so as to realize the final slag-blocking posture of the slag-blocking unit (the angle is best so that the metal slag sliding off the flap surface falls into the slag pit).

[0036] 4. At this time, the oxygen lance is turned on to carry out the blowing operation. The steel slag in the converter splashes out from the converter mouth and is blocked by the flapping baffles set on both sides of the converter. Some of it sticks to the surface of the flapping baffle, and some slides off the flapping surface and falls into the slag pit.

[0037] 5. After the converter blowing is completed, the slag blocking unit is returned to its initial position (without affecting the movement of the ladle car and the transfer of materials).

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "preferred embodiment," "detailed description," or "preferred embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Therefore, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the claims of this utility model.

Claims

1. A slag-blocking device for a steelmaking converter, wherein a slag-blocking unit (4) is provided on each side of the converter; characterized in that: The two slag-blocking units (4) have the same structure. Each slag-blocking unit includes a mounting column (401). A scissor fork assembly (403) is installed on the side of the mounting column (401) facing the converter. The scissor fork assembly (403) is driven to extend horizontally by a hydraulic cylinder (409) to control the extension or retraction of the movable end. A flap angle adjustment mechanism is installed on the movable end. The flap angle adjustment mechanism is used to adjust the flip angle of the flap (406) to achieve converter slag protection.

2. The slag-blocking device for steelmaking converters according to claim 1, characterized in that, The two slag-blocking units (4) are set as mirror images of the central axis of the converter.

3. The slag-blocking device for steelmaking converters according to claim 1, characterized in that, The flap (406) is provided with an insulating cotton board (415).

4. The slag-blocking device for steelmaking converters according to claim 1, characterized in that, The scissor fork assembly (403) includes a base plate (402) mounted on the top of the mounting column (401). Two sets of connecting rods are mounted on the base plate (402), and a movable plate (405) is mounted on the top of each set of connecting rods, serving as the movable end. Each set of connecting rods includes two cross-connecting rods, wherein the middle portion of the first connecting rod is hinged to the middle portion of the second connecting rod via a pivot, forming an X-shaped cross structure. The first end of the first connecting rod is hinged to the base plate (402), and the second end of the first connecting rod is hinged to the movable plate (405). Hinged; the first end of the second link is slidably connected to the base plate (402), and the second end of the second link is slidably connected to the moving plate (405); a moving shaft (410) is provided between the first ends of the second link in the two sets of links, and the moving shaft (410) is hinged to the second link on both sides respectively; a hydraulic cylinder (409) is installed on the base plate (402) as a driving element, and the piston rod of the hydraulic cylinder (409) is hinged to the middle of the moving shaft (410), and the extension and retraction of the scissor fork assembly is controlled by extension and retraction.

5. The slag-blocking device for steelmaking converters according to claim 4, characterized in that, A fixed shaft (404) is provided between the first ends of the first link of the two sets of links, and the fixed shaft (404) is hinged to the first links on both sides of it respectively; providing a stable support point for the scissor fork assembly.

6. The slag-blocking device for steelmaking converters according to claim 4 or 5, characterized in that, The base plate (402) is provided with a guide groove (411), and the first end of the second connecting rod is rotatably provided with a guide wheel (412). The guide wheel (412) moves in the guide groove (411) to complete the sliding connection between the first end of the second connecting rod and the base plate (402).

7. The slag-blocking device for steelmaking converters according to claim 4 or 5, characterized in that, The movable plate (405) is provided with a guide groove (414), and the second end of the second connecting rod is rotatably provided with a guide wheel (413). The guide wheel (413) moves in the guide groove (414) to complete the sliding connection between the second end of the second connecting rod and the movable plate (405).

8. The slag-blocking device for steelmaking converters according to claim 4, characterized in that, The flip-plate angle adjustment mechanism includes a frame (421) mounted on a movable plate (405). The frame (421) is rotatably connected to the end of the flip plate (406) via a rotating shaft (416). One side of the flip plate (406) is connected to the frame (421) via a support arm (407). The first end of the support arm (407) is hinged to the flip plate (406), and the second end of the support arm (407) is slidably connected to the frame.

9. The slag-blocking device for steelmaking converters according to claim 8, characterized in that, The frame (421) has a groove (420) and a slider (419) is slidably disposed in the groove (420). The slider (419) is hinged to the second end of the support arm (407) by a pin (418).

10. The slag-blocking device for steelmaking converters according to claim 9, characterized in that, A second hydraulic cylinder (417) is installed inside the slide (420), and the piston rod of the second hydraulic cylinder (417) is connected to the slider (419).

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