A slag breaker for a ladle

Abstract

This utility model discloses a slag breaker for molten iron ladles, including a slag breaking frame and a slag breaking gun, with the slag breaking gun positioned at the front of the slag breaking frame. The slag breaking gun is a segmented slag breaking gun, including an upper gun rod, a lower gun rod, and two connecting plates. The two connecting plates are located at the front and rear of the slag breaking gun, respectively. The upper end of the connecting plate is fixedly connected to the lower end of the upper gun rod, and the lower end of the connecting plate is connected to the upper end of the lower gun rod via a rotating pin and a breaking structure. Alternatively, the upper end of the connecting plate is connected to the lower end of the upper gun rod via a rotating pin and a breaking structure, and the lower end of the connecting plate is fixedly connected to the upper end of the lower gun rod. By employing a segmented slag-breaking lance, even in the extreme case where the slag-breaking lance stops inside the molten iron ladle and cannot be lifted, the molten iron ladle car can still continue to move forward. The horizontal force generated by the contact between the molten iron ladle wall and the slag-breaking lance damages the broken structure, allowing the lower lance rod to rotate around the rotating pin. As the molten iron ladle car continues to move, the lower lance rod rests on the molten iron ladle wall and rotates at a certain angle, eventually automatically detaching from the molten iron ladle. This solves the problem of subsequent steelmaking processes being affected by this extreme situation.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically to a slag breaker for molten iron ladles. Background Technology

[0002] In the process of temperature measurement and sampling of molten iron in the metallurgical industry, the temperature of the molten iron ladle is relatively low compared to that of the molten steel, and the slag layer on the surface of the molten iron is prone to slag formation and crusting. Therefore, before temperature measurement and sampling, it is necessary to break the slag surface to create a hole to accommodate the insertion of the temperature measurement and sampling gun. Currently, most steel plants still rely on manual hand-held slag-breaking guns for slag breaking and subsequent temperature measurement and sampling.

[0003] Existing automated slag breaking technologies fall into two categories. The first typically involves a robot gripping a slag-breaking gun to break up the molten iron slag surface. In this approach, the slag-breaking gun is mounted as a standalone tool on the end of the six-axis of an industrial robot, or it's mounted on a quick-change tool for the robot, allowing switching between the two. When slag breaking is needed, the robot carries the slag-breaking gun and inserts it into the molten iron slag surface, breaking the slag layer to allow a temperature sampling gun to be inserted for temperature measurement and sampling. The second approach generally uses a motor-driven sprocket chain and slider to move the slag-breaking gun to break up the molten iron slag surface. In this solution, the motor is mounted at the top or middle of the equipment, driving the sprocket chain. The slider is connected to a track on one side and fixed to the chain on the other, with the slag-breaking gun mounted on the slider. When slag breaking is needed, the motor drives the sprocket chain to lower the slag-breaking gun along the track to the molten iron slag surface. After breaking the slag layer, manual or robotic temperature measurement and sampling are performed.

[0004] The existing manual slag breaking method has the following drawbacks: Firstly, manual slag breaking is labor-intensive, involves frequent operations, and molten iron is prone to splashing during the breaking process, posing a high safety risk. Secondly, when the slag surface of the molten iron is severely slag-covered, it is impossible for a manual handheld slag breaking gun to break through the slag surface for temperature measurement and sampling, which in turn affects the smooth progress of subsequent steelmaking processes and the adjustment of process parameters.

[0005] The existing technology of using robots to grasp slag-breaking guns for slag breaking has the following drawbacks: Firstly, it requires robots with large load capacities and long arm spans, resulting in a large footprint for the slag-breaking system. Secondly, since the slag-breaking gun is installed at the end of the robot's six axes, there is a risk of overloading the robot when slag buildup on the molten iron surface is severe. This could cause the slag-breaking gun to stop inside the ladle and be unable to recover in a short time, thus affecting subsequent steelmaking processes.

[0006] The technical approach of using a motor-driven sprocket chain and slider to drive the slag-breaking gun has the following drawbacks: When the sprocket chain-driven slag-breaking gun is in operation, the instantaneous contact between the slag-breaking gun and the slag surface can generate a large impact force, posing a risk of chain breakage. Simultaneously, the overall equipment vibration is significant, putting considerable impact on the slider guide mechanism and easily damaging it. In high-temperature environments, the lubricating grease in the chain drive is prone to volatilization, leading to accelerated chain wear, reduced transmission efficiency, and shorter service life. Furthermore, thermal expansion at high temperatures can increase chain tension, potentially causing chain breakage or sprocket damage. Since the slag-breaking gun is fixed to the chain, if the chain breaks, the slag-breaking gun will fall instantly, potentially causing equipment downtime and damage, and also posing a safety hazard to personnel. Additionally, if the slag-breaking gun remains inside the molten iron ladle, it cannot be removed quickly enough, preventing the ladle car from moving and thus affecting subsequent steelmaking processes, resulting in economic losses for the steel plant. Using sprocket and chain drive, in order to meet the lifting requirements, the equipment occupies a large area, is heavy, and requires a large vertical space. It also requires the construction of a special steel structure support and maintenance platform, resulting in high investment costs. At the same time, the equipment is difficult to install and maintain. Utility Model Content

[0007] Therefore, this utility model provides a ladle slag breaker to solve one or more of the above-mentioned problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A slag breaker for molten iron ladles includes a slag breaking frame and a slag breaking gun, the slag breaking gun being disposed on the front side of the slag breaking frame; the slag breaking gun is a segmented slag breaking gun, including an upper gun rod, a lower gun rod, and two connecting plates, the two connecting plates being respectively located on the front and rear sides of the slag breaking gun, the upper end of the connecting plate being fixedly connected to the lower end of the upper gun rod, and the lower end of the connecting plate being connected to the upper end of the lower gun rod via a rotating pin and a breaking structure; or, the upper end of the connecting plate being connected to the lower end of the upper gun rod via a rotating pin and a breaking structure, and the lower end of the connecting plate being fixedly connected to the upper end of the lower gun rod.

[0010] Furthermore, the breaking structure is a shear pin or an intermittent weld point.

[0011] Furthermore, the molten iron ladle slag breaker also includes a reducer with a self-locking function. The reducer with the self-locking function is installed on the rear mounting plate of the slag breaking frame and is used to drive the slag breaking gun to move vertically.

[0012] Furthermore, the reducer is a worm gear reducer.

[0013] Furthermore, the molten iron ladle slag breaker also includes a drive motor and a hand crank. The drive motor is mounted on the rear mounting plate of the slag breaking frame. The motor shaft of the drive motor is connected to the input shaft of the reducer with self-locking function. The other end of the input shaft of the reducer with self-locking function extends out of the housing of the reducer with self-locking function and is equipped with the hand crank.

[0014] Furthermore, the drive motor is a variable frequency motor or a servo motor.

[0015] Furthermore, the molten iron ladle slag breaker also includes a gear and a rack. The gear is mounted on the output shaft of the reducer with a self-locking function, and the rack is mounted on the side of the slag breaking gun facing the gear. The gear meshes with the rack.

[0016] Furthermore, a guide mechanism is provided on the front side of the slag breaking frame, and the slag breaking gun moves in the vertical direction under the action of the guide mechanism.

[0017] Furthermore, the guiding mechanism is a guide wheel assembly, which includes a mounting base, a rotating plate, and a plurality of guide wheels; the rotating plate is mounted on one side of the mounting base via a rotating shaft; a set screw is provided on the side of the mounting base, and one end of the set screw abuts against the side of the rotating plate; two guide wheels are provided at both ends of the rotating plate, and two guide wheels are provided at both ends of the mounting base.

[0018] Furthermore, the slag-breaking gun also includes a slag-breaking head, which is detachably mounted at the lower end of the lower gun rod via a quick-release structure; an openable and closable protective cover is provided at the quick-release structure.

[0019] Furthermore, the molten iron ladle slag breaker also includes a distance sensor, which is installed on the slag breaking frame and is used to detect the lifting height of the slag breaking gun.

[0020] Furthermore, the ranging sensor is a laser ranging sensor.

[0021] This utility model has the following advantages:

[0022] By employing a segmented slag-breaking lance, even in the extreme case where the slag-breaking lance stops inside the molten iron ladle and cannot be lifted, the molten iron ladle car can still continue to move forward. Utilizing the horizontal force generated by the contact between the molten iron ladle wall and the slag-breaking lance, the broken structure is damaged, allowing the lower lance rod to rotate around the rotating pin. As the molten iron ladle car continues to move, the lower lance rod rests on the molten iron ladle wall and rotates at a certain angle, eventually automatically detaching from the molten iron ladle. This solves the problem of subsequent steelmaking processes being affected after this extreme situation (referring to: the slag-breaking lance stopping inside the molten iron ladle and being unable to be lifted) occurs. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0025] Figure 1 A schematic diagram of a ladle slag breaker;

[0026] Figure 2 This is a schematic diagram of the structure of a ladle slag breaker from another viewpoint.

[0027] Figure 3 A schematic diagram of the slag-breaking gun of a molten iron ladle slag breaker;

[0028] Figure 4 A schematic diagram of the guide wheel assembly of a ladle slag breaker;

[0029] Figure 5 This is a schematic diagram of the slag breaking head of a slag breaking gun for a molten iron ladle slag breaking device.

[0030] In the diagram: 1. Variable frequency motor; 2. Worm gear reducer; 3. Gear; 4. Upper gun rod; 5. Lower gun rod; 6. Slag breaking head; 7. Guide wheel assembly; 8. Slag breaking frame; 9. Hand crank; 10. Auxiliary protective lifting chain; 11. Shearing pin; 12. Rack; 13. Rotating pin shaft; 14. Connecting plate; 15. Mounting base; 16. Rotating plate; 17. Guide wheel; 18. Hollow round tube; 19. Solid cone; 20. Laser rangefinder sensor; 21. Protective cover. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 5 As shown, this embodiment provides a ladle slag breaker, including a slag breaking frame 8 and a slag breaking gun. The slag breaking gun is vertically arranged on the front side of the slag breaking frame 8. The slag breaking gun is a segmented slag breaking gun, including an upper gun rod 4, a lower gun rod 5, and two connecting plates 14. The two connecting plates 14 are located on the front and rear sides of the slag breaking gun, respectively. The upper end of the connecting plate 14 is fixedly connected to the lower end of the upper gun rod 4, and the lower end of the connecting plate 14 is connected to the upper end of the lower gun rod 5 through a rotating pin 13 and a breaking structure. Alternatively, the upper end of the connecting plate 14 is connected to the lower end of the upper gun rod 4 through a rotating pin 13 and a breaking structure, and the lower end of the connecting plate 14 is fixedly connected to the upper end of the lower gun rod 5. The axis of the rotating pin 13 extends in the front-rear direction. In this embodiment, a shear pin 11 is used as the breaking structure. The lower gun rod 5 of the slag-breaking gun contacts the wall of the molten iron ladle. After being subjected to a horizontal force greater than a certain threshold, the shear pin 11 breaks, and the lower gun rod 5 can rotate around the rotating pin 13. As the molten iron ladle continues to move (in this embodiment, the direction of movement of the molten iron ladle is left and right), the lower gun rod 5 rests on the wall of the molten iron ladle and rotates at a certain angle, eventually automatically detaching from the molten iron ladle. This ensures that the upper equipment of the slag-breaking device is not damaged and does not affect the continuity of the subsequent metallurgical process. During this period, the lower gun rod 5 is connected to the upper gun rod 4 through the rotating pin 13, connecting plate 14, and other structures, and will not fall into the molten iron ladle. Optionally, an intermittent weld point is used as the breaking structure. When the lower gun rod 5 is subjected to a sufficient horizontal force, the weld point will break open, thereby allowing the lower gun rod 5 to rotate around the rotating pin 13. For example, the connecting plate 14 is connected to the upper gun rod 4 by bolts, positioning pins, etc. For example, the cross-section of the upper gun rod 4 and the lower gun rod 5 is H-shaped, that is, H-shaped steel can be used to ensure sufficient structural strength; the upper gun rod 4 and the lower gun rod 5 can also be made of channel steel, rectangular steel pipe, circular steel pipe and other profiles.

[0033] The molten iron ladle slag breaker also includes a self-locking reducer, which is mounted on the rear mounting plate of the slag breaking frame 8. This self-locking reducer drives the slag breaking gun for vertical movement. In this embodiment, the reducer is a worm gear reducer, which drives the slag breaking gun to move up and down. The worm gear reducer is a device that uses a worm gear mechanism for speed reduction. The worm gear mechanism has mechanical self-locking properties; therefore, using a worm gear reducer to drive the slag breaking gun gives it a self-locking function, effectively preventing the slag breaking gun from falling due to power failure, thus avoiding equipment damage and safety accidents.

[0034] The molten iron ladle slag breaker also includes a drive motor and a hand crank 9. The drive motor is mounted on the rear mounting plate of the slag breaking frame 8. The motor shaft of the drive motor is connected to the input shaft of a reducer with a self-locking function. The other end of the input shaft of the reducer with a self-locking function extends from the housing of the reducer and is fitted with a hand crank 9. In this embodiment, the drive motor is a variable frequency motor 1 or a servo motor. By setting the hand crank 9, when the system is powered off, the slag breaking gun can be manually raised above the platform by cranking the hand crank 9, avoiding affecting the movement of the molten iron ladle locomotive. Exemplarily, the overall position of the variable frequency motor 1 and the worm gear reducer is adjusted by adjusting the set screws on the side of the mounting plate, thereby adjusting the meshing clearance between the rack 12 and the gear 3. Exemplarily, the variable frequency motor 1 and the worm gear reducer are connected by a coupling.

[0035] In this embodiment, the worm gear reducer drives the slag-breaking gun through a gear 3 and rack 12 mechanism. Specifically, gear 3 is mounted on the output shaft of the worm gear reducer, and rack 12 is mounted on the side of the slag-breaking gun facing gear 3, with gear 3 meshing with rack 12. Since the slag-breaking gun is a two-section design, rack 12 is also at least two sections, one mounted on the upper gun rod 4 and the other on the lower gun rod 5. Before the shearing pin 11 is cut, the two sections of rack 12 are engaged with each other.

[0036] A guide mechanism is provided on the front side of the slag-breaking frame 8, and the slag-breaking gun moves vertically under the action of the guide mechanism. In this embodiment, the guide mechanism is a guide wheel set 7, corresponding to the upper gun rod 4 and lower gun rod 5 of the H-beam. There are 4 sets of guide wheel sets 7, two sets in a pair, and the two pairs are arranged vertically spaced. The two sets in each pair are arranged horizontally spaced. Each pair can guide the slag-breaking gun, and the two pairs effectively improve the guiding stability. The guide wheel set 7 is fixed to the front side of the slag-breaking frame 8 by bolts, positioning pins, etc. Two guide wheel set connecting brackets are provided, and the two guide wheel set connecting brackets are arranged horizontally spaced. The middle of the two brackets is used to install the guide wheel set 7. The guide wheel set 7 is fixed to the guide wheel set connecting bracket by bolts, positioning pins, etc. The guide wheel assembly 7 includes a mounting base 15, a rotating plate 16, and several guide wheels 17. The mounting base 15 is fixed to the guide wheel assembly connecting bracket. The rotating plate 16 is mounted on one side of the mounting base 15 via a rotating shaft, the axis of which extends in the left-right direction. Two guide wheels 17 are provided at both ends of the rotating plate 16, the rotation axes of which extend in the front-back direction. Two guide wheels 17 are also provided at both ends of the mounting base 15, the rotation axes of which extend in the left-right direction. A set screw is provided on the side of the mounting base 15, one end of which abuts against the side of the rotating plate 16. By adjusting the set screw, the rotation can be adjusted. Plate 16 rotates around its axis by a certain angle, causing the two guide wheels 17 on the rotating plate 16 to act on the inner sides of the two side flanges of the H-beam, while the two guide wheels 17 on the mounting base 15 act on the middle plate of the H-beam. This ensures that all three sides of the H-beam are guided by guide wheels 17. Combined with the paired guide wheel sets 7, this restricts the horizontal displacement of the slag-breaking gun, allowing it to move only vertically. When the slag-breaking gun is perpendicular to the molten iron surface, it is subjected only to vertical slag-breaking reaction force, reducing impact and vibration on the guide wheel sets 7 and extending their service life. Optionally, the guiding mechanism can employ guide rails or sliders.

[0037] The slag-breaking gun also includes a slag-breaking head 6, which is detachably mounted on the lower end of the lower gun rod 5 via a quick-release structure. This quick-release structure allows for rapid replacement of the slag-breaking head 6. For example, the slag-breaking head 6 includes a hollow circular tube 18 and a solid cone welded to one end of the hollow circular tube 18. During slag breaking, the solid cone first contacts the slag surface. Utilizing the principle that a smaller contact area results in greater pressure, after creating a hole in the slag surface, the inclined surface of the solid cone pushes the slag outwards, gradually breaking the slag surface. The other end of the hollow circular tube 18 has a pin hole. Correspondingly, the lower end of the lower gun rod 5 has a protrusion that can be inserted into the hollow circular tube 18, and the protrusion also has a pin hole. After the hollow circular tube 18 is inserted into the protrusion, the pin is inserted into the pin hole to complete the rapid installation of the slag-breaking head 6; conversely, rapid disassembly is achieved by inserting the pin into the protrusion. A closable protective cover 21 is provided at the quick-release structure. For example, the lower end of the H-beam's lower gun rod 5 is provided with an end plate, and a protruding post is provided on the lower side of the end plate. The upper end of the protective cover 21 is connected to the upper surface of the end plate by a hinge. Under its own weight, the protective cover 21 is fastened to the position of the pin and the pin hole, preventing molten iron from splashing into the pin hole and causing the pin to be unable to be pulled out. A hanging ring is also provided on the outside of the hollow round tube 18. An auxiliary protective lifting chain 10 is connected to the slag breaking frame 8. A safety buckle is provided at the lower end of the auxiliary protective lifting chain 10. When disassembling or assembling the slag breaking head 6, the safety buckle is hung on the hanging ring to prevent the slag breaking head 6 from falling and causing accidents such as injury.

[0038] The molten iron ladle slag breaker also includes a distance sensor, which is mounted on the slag breaking frame 8 and used to detect the lifting height of the slag breaking gun. For example, the distance sensor is a laser distance sensor 20, whose ranging beam is emitted vertically (up or down). A ranging plate is positioned on the slag breaking gun corresponding to the ranging beam. Thus, when the slag breaking gun is raised or lowered, the laser distance sensor 20 determines the distance the slag breaking gun has moved by detecting the movement of the ranging plate.

[0039] After the molten iron ladle enters the station, the molten iron level detection system (not the device described in this application) detects the height of the molten iron surface. A laser rangefinder 20 monitors the lifting height of the slag-breaking gun in real time and adjusts the set slag-breaking depth accordingly based on the molten iron surface height data. When slag breaking is required, the variable frequency motor 1 drives the worm gear reducer to rotate the gear 3. The gear 3 meshes with the rack 12, causing the slag-breaking gun to descend to the set depth for slag breaking. After slag breaking is completed, the variable frequency motor 1 reverses, returning the slag-breaking gun to its original position. The success of slag breaking is determined based on the data from the laser rangefinder 20. When the slag-breaking gun reaches the system-adjusted slag-breaking depth, slag breaking is successful, and the power system lifts the slag-breaking gun back to its original position. If the slag-breaking gun does not reach the set slag-breaking depth, slag breaking is unsuccessful, and the power system drives the slag-breaking gun for a second slag breaking operation. If it is still unsuccessful, the slag-breaking gun is lifted back to its original position, prompting manual slag breaking and temperature sampling. If the slag-breaking gun fails to reach the slag-breaking depth for a certain period of time, it indicates that the slag surface is severely slag-forming and the slag-breaking gun cannot break through the slag surface. In this case, the system will automatically lift the slag-breaking gun back to its original position to protect the power system and prevent equipment damage.

[0040] The molten iron ladle slag breaker in this embodiment occupies less than 1 square meter. Its power, transmission and adjustment parts are compactly designed and all within easy reach of the platform, eliminating the need to build a maintenance platform and facilitating on-site inspection and maintenance.

[0041] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A slag breaker for molten iron ladles, comprising a slag breaking frame (8) and a slag breaking gun, wherein the slag breaking gun is disposed on the front side of the slag breaking frame (8), characterized in that, The slag breaking gun is a segmented slag breaking gun, including an upper gun rod (4), a lower gun rod (5), and two connecting plates (14). The two connecting plates (14) are located at the front and rear sides of the slag breaking gun, respectively. The upper end of the connecting plate (14) is fixedly connected to the lower end of the upper gun rod (4), and the lower end of the connecting plate (14) is connected to the upper end of the lower gun rod (5) through a rotating pin (13) and a breaking structure; or, the upper end of the connecting plate (14) is connected to the lower end of the upper gun rod (4) through a rotating pin (13) and a breaking structure, and the lower end of the connecting plate (14) is fixedly connected to the upper end of the lower gun rod (5).

2. The slag breaker for molten iron ladle according to claim 1, characterized in that, The molten iron ladle slag breaker also includes a speed reducer with a self-locking function. The speed reducer with a self-locking function is installed on the rear mounting plate of the slag breaking frame (8). The speed reducer with a self-locking function is used to drive the slag breaking gun to move vertically.

3. The slag breaker for molten iron ladle according to claim 2, characterized in that, The molten iron ladle slag breaker also includes a drive motor and a hand crank (9). The drive motor is mounted on the rear mounting plate of the slag breaking frame (8). The motor shaft of the drive motor is connected to the input shaft of the reducer with self-locking function. The other end of the input shaft of the reducer with self-locking function extends out of the housing of the reducer with self-locking function and is equipped with the hand crank (9).

4. The slag breaker for molten iron ladle according to claim 2, characterized in that, The molten iron ladle slag breaker also includes a gear (3) and a rack (12). The gear (3) is mounted on the output shaft of the reducer with a self-locking function, and the rack (12) is mounted on the side of the slag breaker facing the gear (3). The gear (3) meshes with the rack (12).

5. The slag breaker for molten iron ladle according to claim 1, characterized in that, A guide mechanism is provided on the front side of the slag breaking frame (8), and the slag breaking gun moves in the up and down direction under the action of the guide mechanism.

6. The slag breaker for molten iron ladle according to claim 1, characterized in that, The slag-breaking gun also includes a slag-breaking head (6), which is detachably mounted on the lower end of the lower gun rod (5) via a quick-release structure; an openable and closable protective cover (21) is provided at the quick-release structure.

7. The slag breaker for molten iron ladle according to claim 1, characterized in that, The molten iron ladle slag breaker also includes a distance sensor, which is installed on the slag breaking frame (8) and is used to detect the lifting height of the slag breaking gun.

8. The slag breaker for molten iron ladle according to claim 3, characterized in that, The breaking structure is a shear pin (11) or an intermittent weld point, the reducer is a worm gear reducer, and the drive motor is a variable frequency motor (1) or a servo motor.

9. The slag breaker for molten iron ladle according to claim 5, characterized in that, The guiding mechanism is a guide wheel assembly (7), which includes a mounting base (15), a rotating plate (16), and a plurality of guide wheels (17). The rotating plate (16) is mounted on one side of the mounting base (15) via a rotating shaft. A set screw is provided on the side of the mounting base (15), and one end of the set screw abuts against the side of the rotating plate (16). Two guide wheels (17) are provided at both ends of the rotating plate (16) and two guide wheels (17) are provided at both ends of the mounting base (15).

10. The slag breaker for molten iron ladle according to claim 7, characterized in that, The ranging sensor is a laser ranging sensor (20).

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