Prefabricated slag blocking wall for continuous casting tundish

Abstract

The utility model discloses a prefabricated slag stopping wall for a continuous casting tundish, which relates to the technical field of prefabricated slag stopping walls and comprises a tundish main body. The first slag stopping wall and the second slag stopping wall are arranged in the tundish main body; the two first slag stopping holes are formed in the first slag stopping wall and the second slag stopping wall; the two second slag stopping holes are formed in the bottom ends of the first slag stopping holes in a staggered manner; the two first limiting blocks are arranged on one sides of the multiple first slag stopping holes; the two second limiting blocks are arranged on one sides of the multiple second slag stopping holes, the two first drainage holes are formed in one side of the tundish main body, the two second drainage holes are formed in the other side of the tundish main body, the parallel guide frames are fixedly connected to one sides of the first drainage holes, and the L-shaped guide pipes are fixedly connected to one sides of the second drainage holes. The prefabricated slag blocking wall is used for the continuous casting tundish, sundries which do not float up in molten steel can be prevented from being discharged through the first slag blocking hole and the second slag blocking hole, and the shunting efficiency of the molten steel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated slag retaining walls, in particular to a prefabricated slag retaining wall used for a continuous casting tundish. Background Art

[0002] The structural shape of the slag retaining wall used in the metallurgical continuous casting tundish and the distribution of the size and position of the steel outlet on the slag retaining wall are factors that affect the quality of the continuous casting billet. To achieve a better slag retaining effect, a more reasonable design of the slag retaining wall is needed.

[0003] After searching the publication (announcement) number: CN2483120Y, a slag retaining wall of a continuous casting intermediate tank is disclosed, on which there are molten steel outlets with different apertures, different positions, different left and right tilt angles a, a' and different upper and lower tilt angles β, β'. This slag retaining wall is particularly suitable for continuous casting production with six machines and six streams and a spacing of 1200 mm between the pouring ports of the intermediate tank. It can ensure that the residence time of the molten steel in the intermediate tank is ≥10 minutes, which is conducive to the floating of debris in the center of the molten steel. Since the slag retaining wall is installed in a reasonable position in the intermediate tank, the dead corner of the molten steel in the intermediate tank is eliminated, and the first furnace can achieve six streams to be poured at the same time, and the success rate of pouring can reach 100%, and the temperature difference of the molten steel in each flow area is within 5°C.

[0004] Although the above scheme can ensure that the residence time of molten steel in the intermediate tank is ≥10 minutes, which is conducive to the floating of debris in the center of the molten steel, the slag in the molten steel will be driven out together with the molten steel during the outflow process, resulting in errors in subsequent production and low diversion efficiency of the molten steel. Utility Model Content

[0005] The main purpose of the utility model is to provide a prefabricated slag retaining wall for a continuous casting tundish to solve the problem that slag in molten steel will be driven out together with the molten steel during the outflow of the molten steel, resulting in errors in subsequent production and low diversion efficiency of the molten steel.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A prefabricated slag retaining wall for a continuous casting tundish comprises a tundish body, and also comprises a first slag retaining wall and a second slag retaining wall arranged inside the tundish body, two first slag retaining holes opened inside the first slag retaining wall and the second slag retaining wall, two second slag retaining holes staggered at the bottom ends of the first slag retaining holes, two first limit blocks arranged on one side of a plurality of first slag retaining holes, two second limit blocks arranged on one side of a plurality of second slag retaining holes, two first drainage holes opened on one side of the tundish body, two second drainage holes opened on the other side of the tundish body, a parallel guide frame fixedly connected to one side of the first drainage hole, and an L-shaped guide pipe fixedly connected to one side of the second drainage hole.

[0008] Preferably, the first slag retaining wall and the second slag retaining wall are V-shaped, and the bottom ends of the first slag retaining wall and the second slag retaining wall extend to the inside of the bottom end of the tundish body.

[0009] Preferably, the middle parts of the top ends of the first slag retaining wall and the second slag retaining wall are fixedly connected with a hanging ring, and vertical columns are fixedly connected to both sides of the top ends of the first slag retaining wall and the second slag retaining wall.

[0010] Preferably, one of the first drainage hole and the second drainage hole is arranged on the right side of the first slag retaining wall, and the other of the first drainage hole and the second drainage hole is arranged on the left side of the second slag retaining wall.

[0011] Preferably, the first drainage hole and the corresponding second drainage hole are arranged on the same vertical plane, and the aperture of the first drainage hole is larger than the aperture of the second drainage hole.

[0012] Preferably, the aperture of the first slag-blocking hole is larger than that of the second slag-blocking hole, and both the first slag-blocking hole and the second slag-blocking hole are arranged obliquely, and the first slag-blocking hole and the second slag-blocking hole are arranged symmetrically along the central axis of the tundish body.

[0013] Preferably, one of the second slag-blocking holes is arranged at equal intervals from top to bottom with respect to the two first slag-blocking holes, and the other second slag-blocking hole is located on the central axis between the second slag-blocking hole at the bottom and the first slag-blocking hole above.

[0014] Preferably, the top end of the L-shaped guide tube is flush with the bottom end of the parallel guide frame.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the utility model, molten steel is poured between the first slag retaining wall and the second slag retaining wall, and the molten steel stays between the first slag retaining wall and the second slag retaining wall. Since the aperture of the first slag retaining hole is larger than the aperture of the second slag retaining hole, and the first slag retaining hole and the second slag retaining hole are both inclined, the molten steel first passes through the two second slag retaining holes with smaller apertures in sequence, and then passes through the two first slag retaining holes with larger apertures in sequence. This can reduce the outflow rate of the molten steel and increase the residence time of the molten steel. The provision of the first limit block and the second limit block can prevent the debris in the molten steel that has not yet floated up from being discharged through the first slag retaining hole and the second slag retaining hole, thereby improving the yield rate of subsequent production.

[0017] 2. In the utility model, through the arrangement of two first drainage holes and a second drainage hole, since the second drainage hole is lower than the first drainage hole, the molten steel will first enter the L-shaped guide tube from the second drainage hole. As the molten steel inside the main body of the tundish continues to increase, the water level continues to rise. Under the effect of pressure balance, the water level in the L-shaped guide tube also continues to rise until the molten steel is discharged through the first drainage hole. Since the top end of the L-shaped guide tube is flush with the bottom end of the parallel guide frame, the molten steel is also discharged through the L-shaped guide tube at the same time, thereby improving the diversion efficiency of the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a front view of the tundish body of the utility model;

[0020] Figure 3 This is a front view of the first slag retaining wall of the utility model;

[0021] Figure 4 This is a front view of the second slag retaining wall of the utility model;

[0022] Figure 5 It is a left view of the tundish body of the utility model.

[0023] In the figure:

[0024] 1. Tundish body; 2. First slag retaining wall; 3. Lifting ring; 4. Second slag retaining wall; 5. First slag retaining hole; 6. Second slag retaining hole; 7. First drainage hole; 8. Second drainage hole; 9. First limit block; 10. Second limit block; 11. Vertical column; 12. Parallel guide frame; 13. L-shaped guide pipe. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods. Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5As shown, the prefabricated slag retaining wall for the continuous casting tundish includes a tundish body 1, and also includes a first slag retaining wall 2 and a second slag retaining wall 4 arranged inside the tundish body 1, two first slag retaining holes 5 opened in the first slag retaining wall 2 and the second slag retaining wall 4, two second slag retaining holes 6 staggered at the bottom ends of the first slag retaining holes 5, two first limit blocks 9 arranged on one side of the plurality of first slag retaining holes 5, two second limit blocks 10 arranged on one side of the plurality of second slag retaining holes 6, two first drainage holes 7 opened on one side of the tundish body 1, two second drainage holes 8 opened on the other side of the tundish body 1, a parallel guide frame 12 fixedly connected to one side of the first drainage hole 7, and an L-shaped guide pipe 13 fixedly connected to one side of the second drainage hole 8.

[0027] The first slag retaining wall 2 and the second slag retaining wall 4 are V-shaped, and the bottom ends of the first slag retaining wall 2 and the second slag retaining wall 4 extend to the inside of the bottom end of the tundish body 1 .

[0028] The middle parts of the top ends of the first slag retaining wall 2 and the second slag retaining wall 4 are fixedly connected with a hanging ring 3 , and vertical columns 11 are fixedly connected to both sides of the top ends of the first slag retaining wall 2 and the second slag retaining wall 4 .

[0029] One of the first drainage hole 7 and the second drainage hole 8 is arranged on the right side of the first slag retaining wall 2 , and the other first drainage hole 7 and the second drainage hole 8 is arranged on the left side of the second slag retaining wall 4 .

[0030] The first drainage hole 7 and the corresponding second drainage hole 8 are arranged on the same vertical plane, and the aperture of the first drainage hole 7 is larger than that of the second drainage hole 8 .

[0031] The aperture of the first slag-blocking hole 5 is larger than that of the second slag-blocking hole 6 , and both the first slag-blocking hole 5 and the second slag-blocking hole 6 are arranged obliquely, and the first slag-blocking hole 5 and the second slag-blocking hole 6 are symmetrically arranged along the central axis of the tundish body 1 .

[0032] One of the second slag-blocking holes 6 is arranged at equal intervals from top to bottom with respect to the two first slag-blocking holes 5 , and the other second slag-blocking hole 6 is located on the central axis between the second slag-blocking hole 6 at the bottom and the first slag-blocking hole 5 above.

[0033] The top end of the L-shaped guide tube 13 is flush with the bottom end of the parallel guide frame 12 .

[0034] The molten steel is poured between the first slag retaining wall 2 and the second slag retaining wall 4, and stays between the first slag retaining wall 2 and the second slag retaining wall 4. Since the aperture of the first slag retaining hole 5 is larger than that of the second slag retaining hole 6, and the first slag retaining hole 5 and the second slag retaining hole 6 are both inclined, the molten steel first passes through the two second slag retaining holes 6 with smaller apertures in turn, and then passes through the two first slag retaining holes 5 with larger apertures in turn. This can reduce the outflow rate of the molten steel and increase the residence time of the molten steel. The first limit block 9 and the second limit block 10 can be set to prevent the debris in the molten steel that has not yet floated up from being discharged through the first slag retaining hole 5 and the second slag retaining hole 6, thereby improving the yield rate of subsequent production. Example 2

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the prefabricated slag retaining wall for the continuous casting tundish includes a tundish body 1, and also includes a first slag retaining wall 2 and a second slag retaining wall 4 arranged inside the tundish body 1, two first slag retaining holes 5 opened in the first slag retaining wall 2 and the second slag retaining wall 4, two second slag retaining holes 6 staggered at the bottom ends of the first slag retaining holes 5, two first limit blocks 9 arranged on one side of the plurality of first slag retaining holes 5, two second limit blocks 10 arranged on one side of the plurality of second slag retaining holes 6, two first drainage holes 7 opened on one side of the tundish body 1, two second drainage holes 8 opened on the other side of the tundish body 1, a parallel guide frame 12 fixedly connected to one side of the first drainage hole 7, and an L-shaped guide pipe 13 fixedly connected to one side of the second drainage hole 8.

[0036] The first slag retaining wall 2 and the second slag retaining wall 4 are V-shaped, and the bottom ends of the first slag retaining wall 2 and the second slag retaining wall 4 extend to the inside of the bottom end of the tundish body 1 .

[0037] The middle parts of the top ends of the first slag retaining wall 2 and the second slag retaining wall 4 are fixedly connected with a hanging ring 3 , and vertical columns 11 are fixedly connected to both sides of the top ends of the first slag retaining wall 2 and the second slag retaining wall 4 .

[0038] One of the first drainage hole 7 and the second drainage hole 8 is arranged on the right side of the first slag retaining wall 2 , and the other first drainage hole 7 and the second drainage hole 8 is arranged on the left side of the second slag retaining wall 4 .

[0039] The first drainage hole 7 and the corresponding second drainage hole 8 are arranged on the same vertical plane, and the aperture of the first drainage hole 7 is larger than that of the second drainage hole 8 .

[0040] The aperture of the first slag-blocking hole 5 is larger than that of the second slag-blocking hole 6 , and both the first slag-blocking hole 5 and the second slag-blocking hole 6 are arranged obliquely, and the first slag-blocking hole 5 and the second slag-blocking hole 6 are symmetrically arranged along the central axis of the tundish body 1 .

[0041] One of the second slag-blocking holes 6 is arranged at equal intervals from top to bottom with respect to the two first slag-blocking holes 5 , and the other second slag-blocking hole 6 is located on the central axis between the second slag-blocking hole 6 at the bottom and the first slag-blocking hole 5 above.

[0042] The top end of the L-shaped guide tube 13 is flush with the bottom end of the parallel guide frame 12 .

[0043] By setting the two first drain holes 7 and the second drain hole 8, since the second drain hole 8 is lower than the first drain hole 7, the molten steel will first enter the L-shaped guide tube 13 from the second drain hole 8. As the molten steel inside the ladle body 1 continues to increase, the water level continues to rise. Under the effect of pressure balance, the water level in the L-shaped guide tube 13 also continues to rise until the molten steel is discharged through the first drain hole 7. Since the top end of the L-shaped guide tube 13 is flush with the bottom end of the parallel guide frame 12, the molten steel is also discharged through the L-shaped guide tube 13 at the same time, thereby improving the diversion efficiency of the molten steel.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A prefabricated slag retaining wall for a continuous casting tundish, comprising a tundish body (1), characterized in that: It also comprises a first slag retaining wall (2) and a second slag retaining wall (4) arranged inside the tundish body (1), two first slag retaining holes (5) opened inside the first slag retaining wall (2) and the second slag retaining wall (4), two second slag retaining holes (6) staggeredly arranged at the bottom ends of the first slag retaining holes (5), two first stop blocks (9) arranged on one side of the plurality of first slag retaining holes (5), two second stop blocks (10) arranged on one side of the plurality of second slag retaining holes (6), two first drainage holes (7) opened on one side of the tundish body (1), two second drainage holes (8) opened on the other side of the tundish body (1), a parallel guide frame (12) fixedly connected to one side of the first drainage hole (7), and an L-shaped guide pipe (13) fixedly connected to one side of the second drainage hole (8).

2. The prefabricated slag retaining wall for the continuous casting tundish according to claim 1 is characterized in that: The first slag retaining wall (2) and the second slag retaining wall (4) are V-shaped, and the bottom ends of the first slag retaining wall (2) and the second slag retaining wall (4) extend to the inside of the bottom end of the tundish body (1).

3. The prefabricated slag retaining wall for the continuous casting tundish according to claim 2 is characterized in that: A lifting ring (3) is fixedly connected to the middle of the top end of each of the first slag retaining wall (2) and the second slag retaining wall (4), as well as vertical columns (11) fixedly connected to both sides of the top end of each of the first slag retaining wall (2) and the second slag retaining wall (4).

4. The prefabricated slag retaining wall for the continuous casting tundish according to claim 3 is characterized in that: One of the first drainage hole (7) and the second drainage hole (8) is arranged on the right side of the first slag retaining wall (2), and the other of the first drainage hole (7) and the second drainage hole (8) is arranged on the left side of the second slag retaining wall (4).

5. The prefabricated slag retaining wall for the continuous casting tundish according to claim 4, characterized in that: The first drainage hole (7) and the corresponding second drainage hole (8) are arranged on the same vertical plane, and the hole diameter of the first drainage hole (7) is larger than the hole diameter of the second drainage hole (8).

6. The prefabricated slag retaining wall for the continuous casting tundish according to claim 5, characterized in that: The aperture of the first slag blocking hole (5) is larger than the aperture of the second slag blocking hole (6), and the first slag blocking hole (5) and the second slag blocking hole (6) are both arranged obliquely, and the first slag blocking hole (5) and the second slag blocking hole (6) are symmetrically arranged along the central axis of the tundish body (1).

7. The prefabricated slag retaining wall for the continuous casting tundish according to claim 6, characterized in that: One of the second slag blocking holes (6) and the two first slag blocking holes (5) are arranged at equal intervals from top to bottom, and the other second slag blocking hole (6) is located on the central axis between the second slag blocking hole (6) at the bottom and the first slag blocking hole (5) at the top.

8. The prefabricated slag retaining wall for the continuous casting tundish according to claim 7, characterized in that: The top end of the L-shaped guide tube (13) is flush with the bottom end of the parallel guide frame (12).

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