Anti-erosion protection device for magnesium-carbon brick of refining ladle slag line

Abstract

The utility model discloses a magnesium carbon brick erosion -resistant protection device for refining ladle slag line, including the ladle barrel body, both sides of ladle barrel body upper end all are fixedly arranged with the fixing frame, the inside of one side of ladle barrel body inside upper side is provided with first dam board, the inside of another side of ladle barrel body inside upper side is provided with second dam board, the inside of ladle barrel body is located first dam board, second dam board outside and is provided with slag line brick, and the slag line brick is close to first dam board, second dam board, the front and rear end of the inside of fixing frame and first dam board, second dam board all are provided with threaded hole, and the threaded hole on first dam board, second dam board position corresponds with the threaded hole on the fixing frame, and this structure has solved the problem that the heat on slag line brick is difficult to handle and the protection of slag line brick is not good enough.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically to a magnesia-carbon brick anti-corrosion protection device for refining ladle slag lines. Background Technology

[0002] The anti-corrosion protection device for magnesia-carbon bricks in the slag line of steel ladle is an innovative protection system designed to address the problem of magnesia-carbon bricks being easily corroded by molten slag in the steelmaking process. The protection device is usually composed of an electrochemical control module, a magnesia-carbon brick structure optimization module, and a molten slag control module. The protection device is suitable for the protection of slag lines in the converter-LF refining continuous casting process, electric furnace-VD vacuum refining process, and special steel smelting.

[0003] For example, Chinese patent CN219900228U, entitled "A Steel Ladle Slag Line with High Structural Strength," includes a steel ladle body, a slag line layer, a ladle wall layer, and a ladle bottom layer. The slag line layer, ladle wall layer, and ladle bottom layer are all disposed inside the steel ladle body. The slag line layer and ladle wall layer are both attached to the inner wall of the steel ladle body. The slag line layer is located at the top of the ladle wall layer, and the ladle bottom layer is attached to the bottom wall of the steel ladle body. The slag line layer is constructed of slag line bricks, the ladle wall layer is constructed of ladle wall bricks, and the ladle bottom layer is constructed of ladle bottom bricks. An installation hook is fixedly connected to the inner wall of the steel ladle body. A first installation groove is formed on the side of the slag line brick closest to the inner wall of the steel ladle body, and a second installation groove is formed on the side of the ladle wall brick closest to the inner wall of the steel ladle body. Both the first and second installation grooves are matched with installation hooks, and multiple sets of installation hooks are provided.

[0004] While the aforementioned existing technologies can achieve metallurgical production, in practical use, on the one hand, the protective properties of slag line bricks are not good enough. High-temperature molten slag usually comes into direct contact with the slag line bricks, thus accelerating the corrosion and damage of the slag line bricks. On the other hand, it is difficult to handle the heat on the slag line bricks. Usually, some of the heat from the high-temperature molten slag is transferred to the slag line bricks, causing the bricks to undergo plastic deformation. Therefore, they do not meet the current requirements. In response, we propose a magnesia-carbon brick anti-corrosion protection device for slag lines in refining steel ladles. Utility Model Content

[0005] The purpose of this invention is to provide a magnesia-carbon brick anti-corrosion protection device for slag lines in refining steel ladles, in order to solve the problems mentioned in the background art, such as insufficient protection of slag line bricks and difficulty in handling heat on slag line bricks.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a magnesia-carbon brick anti-corrosion protection device for slag lines in refining steel ladles, comprising a steel ladle body, with fixed frames fixedly installed on both sides of the upper end of the steel ladle body; a first slag baffle plate is installed inside one side of the upper interior of the steel ladle body, and a second slag baffle plate is installed inside the other side of the upper interior of the steel ladle body; slag line bricks are installed inside the steel ladle body outside the first and second slag baffle plates, with the slag line bricks in close contact with the first and second slag baffle plates; threaded holes are provided at the front and rear ends of the fixed frames and the interior of the first and second slag baffle plates, and the threaded holes on the first and second slag baffle plates correspond to the threaded holes on the fixed frames.

[0007] Preferably, the fixing frame is provided with a bolt at the upper end of the threaded hole opening, and the lower end of the bolt enters the interior of the first slag baffle and the second slag baffle through the threaded hole.

[0008] Preferably, the front and rear ends of the second slag baffle are provided with sliding grooves, which are open structures. The front and rear ends of the first slag baffle are fixedly provided with snap-fit ​​strips, which extend into the sliding grooves and slide and limit the movement of the snap-fit ​​strips with the sliding grooves.

[0009] Preferably, a cooling chamber is provided between the slag line brick and the ladle body, and a cooling pipe is provided inside the cooling chamber. The cooling pipe is spirally distributed and in contact with the slag line brick. An inlet pipe is fixedly provided above one side of the ladle body, and an outlet pipe is fixedly provided below the other side of the ladle body. The outlet pipe, the inlet pipe and the cooling pipe are connected.

[0010] Preferably, a filling layer is provided in the gap between the cooling pipe and the cooling cavity.

[0011] Preferably, a fixing frame is fixedly installed on the outside of the steel ladle barrel below the liquid outlet pipe, and lifting rods are fixedly installed on both sides of the outside of the fixing frame.

[0012] Preferably, the ladle barrel body is provided with wall bricks inside the lower end of the slag line bricks, and the ladle barrel body is provided with bottom bricks inside the lower end of the wall bricks, with breathable bricks provided on both sides inside the bottom bricks.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model can prevent high-temperature molten slag from directly scouring the surface of the slag line brick by using the first slag baffle and the second slag baffle. Before metallurgical operations, select the appropriate first slag baffle and the second slag baffle according to the actual production needs and put them into the ladle barrel. At this time, align the snap strip on the first slag baffle with the opening of the slide groove on the second slag baffle and push it into the slide groove until the first slag baffle and the second slag baffle are assembled and the first slag baffle and the second slag baffle are in close contact with the slag line brick. Then, the operator aligns the bolt with the opening of the threaded hole on the fixing frame and rotates it until the lower end of the bolt enters the interior of the first slag baffle and the second slag baffle through the threaded hole, so as to avoid the high-temperature molten slag from directly contacting the slag line brick.

[0015] (2) This utility model can reduce the temperature on the back of the slag line brick through the cooling chamber and cooling pipe. When metallurgical operation is carried out, the heat in the high temperature slag is transferred to the slag line brick. At this time, the operator draws the coolant from the water tank through the external water pump, so that the coolant enters the cooling pipe through the inlet pipe. At this time, the heat on the slag line brick is transferred to the coolant through the cooling pipe, so that the temperature of the coolant rises. The coolant that absorbs heat is discharged from the cooling pipe through the outlet pipe, thereby reducing thermal stress and reducing brick spalling.

[0016] (3) By providing a filling layer, this utility model can fill the gap between the cooling pipe and the cooling chamber. When metallurgical operations are carried out, the heat in the high-temperature molten slag is transferred to the slag line brick. At this time, part of the heat on the slag line brick is transferred to the filling layer, which causes the filling layer to expand under heat in the cooling chamber and fill the micron-level gaps in the brick body caused by manufacturing errors or thermal deformation, thereby preventing molten slag or cooling medium from invading the pores of the brick body. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0018] Figure 2 This is a front view of the internal structure of this utility model;

[0019] Figure 3 This is a side view of the internal structure of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Enlarged view of a portion of region A in the middle.

[0021] In the diagram: 1. Steel ladle body; 2. Fixing frame; 3. Lifting rod; 4. Wall bricks; 5. Slag line bricks; 6. First slag baffle plate; 7. Second slag baffle plate; 8. Liquid inlet pipe; 9. Fixing bracket; 10. Bolt; 11. Threaded hole; 12. Clip strip; 13. Slide groove; 14. Cooling chamber; 15. Filling layer; 16. Cooling pipe; 17. Breathable brick; 18. Bottom bricks; 19. Liquid outlet pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 An embodiment of this utility model provides a magnesia-carbon brick anti-corrosion protection device for slag lines in refining steel ladles, comprising a steel ladle body 1, with fixed frames 9 fixedly installed on both sides of the upper end of the steel ladle body 1, a fixed frame 2 fixedly installed on the outside of the steel ladle body 1 below the liquid outlet pipe 19, lifting rods 3 fixedly installed on both sides of the outside of the fixed frame 2, a wall brick 4 installed inside the steel ladle body 1 at the lower end of the slag line brick 5, a bottom brick 18 installed inside the steel ladle body 1 at the lower end of the wall brick 4, and breathable bricks 17 installed on both sides inside the bottom brick 18.

[0024] Please see Figure 1 , Figure 2 and Figure 4 A first slag baffle 6 is installed inside the upper side of the ladle body 1, and a second slag baffle 7 is installed inside the upper side of the ladle body 1. Slag line bricks 5 are installed inside the ladle body 1 outside the first and second slag baffles 6 and 7, respectively. The slag line bricks 5 are in close contact with the first and second slag baffles 6 and 7. Threaded holes 11 are provided at both the front and rear ends of the fixing frame 9 and the interior of the first and second slag baffles 6 and 7. The threaded holes 11 on the first and second slag baffles 6 and 7 are aligned with the threaded holes 11 on the fixing frame 9. The fixing bracket 9 is provided with a bolt 10 at the upper end of the opening of the threaded hole 11. The lower end of the bolt 10 enters the interior of the first slag baffle 6 and the second slag baffle 7 through the threaded hole 11. The front and rear ends of the interior of the second slag baffle 7 are provided with sliding grooves 13. The sliding grooves 13 are open structures. The front and rear ends of the exterior of the first slag baffle 6 are fixedly provided with snap-fit ​​strips 12. The snap-fit ​​strips 12 extend into the interior of the sliding grooves 13, and the snap-fit ​​strips 12 slide and limit the sliding of the sliding grooves 13, so as to facilitate the shielding of the slag line bricks 5 by the first slag baffle 6 and the second slag baffle 7.

[0025] Please see Figure 2 , Figure 3 and Figure 4 A cooling chamber 14 is provided between the slag line brick 5 and the ladle body 1. A cooling pipe 16 is provided inside the cooling chamber 14. The cooling pipe 16 is spirally distributed and is in contact with the slag line brick 5. An inlet pipe 8 is fixedly provided on the upper part of one side of the ladle body 1, and an outlet pipe 19 is fixedly provided on the lower part of the other side of the ladle body 1. The outlet pipe 19, the inlet pipe 8 and the cooling pipe 16 are connected to facilitate the absorption of heat from the slag line brick 5 through the cooling pipe 16.

[0026] Please see Figure 2 and Figure 4 A filling layer 15 is provided in the gap between the cooling pipe 16 and the cooling cavity 14 to facilitate the reduction of the gap between the cooling pipe 16 and the cooling cavity 14.

[0027] Working principle: In use, first select the appropriate first slag baffle 6 and second slag baffle 7 according to the actual production needs and place them into the ladle barrel 1. At this time, align the snap-fit ​​strip 12 on the first slag baffle 6 with the opening of the slide groove 13 on the second slag baffle 7 and push it into the slide groove 13 until the first slag baffle 6 and second slag baffle 7 are assembled and tightly attached to the slag line brick 5. Then, the operator aligns the bolt 10 with the opening of the threaded hole 11 on the fixing frame 9 and rotates it until the lower end of the bolt 10 enters the interior of the first slag baffle 6 and second slag baffle 7 through the threaded hole 11. When metallurgical operation is carried out, the heat in the high-temperature molten slag is transferred to the slag line brick 5. At this time, the operator uses an external water pump to draw coolant from the water tank, so that the coolant enters the cooling pipe 16 through the inlet pipe 8. At this time, the heat on the slag line brick 5 is transferred to the coolant through the cooling pipe 16, so that the temperature of the coolant rises. The coolant that has absorbed heat is discharged from the cooling pipe 16 through the outlet pipe 19.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A magnesia-carbon brick anti-corrosion protection device for slag lines in refining steel ladles, comprising a ladle body (1), characterized in that: Fixing frames (9) are fixedly installed on both sides of the upper end of the ladle barrel (1). A first slag baffle plate (6) is installed inside one side of the upper interior of the ladle barrel (1). A second slag baffle plate (7) is installed inside the other side of the upper interior of the ladle barrel (1). Slag line bricks (5) are installed inside the ladle barrel (1) outside the first slag baffle plate (6) and the second slag baffle plate (7). The slag line bricks (5) are in close contact with the first slag baffle plate (6) and the second slag baffle plate (7). Threaded holes (11) are provided at the front and rear ends of the fixing frame (9) and the interior of the first slag baffle plate (6) and the second slag baffle plate (7). The threaded holes (11) on the first slag baffle plate (6) and the second slag baffle plate (7) correspond to the threaded holes (11) on the fixing frame (9).

2. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 1, characterized in that: The fixing frame (9) is provided with a bolt (10) at the upper end of the opening of the threaded hole (11), and the lower end of the bolt (10) enters the interior of the first slag baffle (6) and the second slag baffle (7) through the threaded hole (11).

3. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 2, characterized in that: The front and rear ends of the second slag baffle (7) are provided with sliding grooves (13), which are open structures. The front and rear ends of the first slag baffle (6) are fixedly provided with snap-fit ​​strips (12), which extend into the sliding groove (13) and slide and limit the snap-fit ​​strips (12) and the sliding groove (13).

4. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 3, characterized in that: A cooling chamber (14) is provided between the slag line brick (5) and the ladle body (1). A cooling pipe (16) is provided inside the cooling chamber (14). The cooling pipe (16) is spirally distributed and is in contact with the slag line brick (5). An inlet pipe (8) is fixedly provided above one side of the ladle body (1). An outlet pipe (19) is fixedly provided below the other side of the ladle body (1). The outlet pipe (19), the inlet pipe (8), and the cooling pipe (16) are connected.

5. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 4, characterized in that: A filling layer (15) is provided in the gap between the cooling pipe (16) and the cooling cavity (14).

6. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 5, characterized in that: The steel ladle barrel (1) is fixedly provided with a fixed frame (2) on the outside below the liquid outlet pipe (19), and lifting rods (3) are fixedly provided on both sides of the fixed frame (2).

7. The anti-corrosion protection device for magnesia-carbon bricks used in refining ladle slag lines according to claim 6, characterized in that: The steel ladle barrel (1) is provided with a wall brick (4) inside the lower end of the slag line brick (5), and a bottom brick (18) is provided inside the lower end of the steel ladle barrel (1) and both sides of the bottom brick (18) are provided with permeable bricks (17).

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