Ladle filler sand receiving and removing device and method

Abstract

The invention provides a steel ladle drainage sand receiving and removing device and method, and relates to the technical field of steel ladle drainage, the device comprises a long nozzle manipulator and a sand receiving device, the long nozzle manipulator is installed on a tundish platform, the sand receiving device comprises a sand receiving barrel, a rotary lifter and a stand column, the rotary lifter is installed on a cross arm of the long nozzle manipulator, and the stand column is connected with the long nozzle manipulator. The sand receiving barrel is connected to the lower portion of the stand column, the upper portion of the stand column is connected with the rotary lifter, and the rotary lifter has rotating and lifting functions and is used for achieving rotating and lifting of the sand receiving barrel. According to the invention, harmful gases in the ladle filler sand, gaps of the ladle filler sand and a long nozzle and a small part of molten steel in contact with the ladle filler sand in a steel ladle can be discharged out of tundish molten steel, so that the purity of the molten steel is obviously improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ladle drainage, in particular, especially relates to a ladle drainage sand removing device and method. BACKGROUND

[0002] In the continuous casting process, multiple ladles are opened in succession. When the sliding plate at the bottom of the ladle is opened, under the action of the static pressure of the molten steel, the drainage sand and the part of the molten steel in the ladle that is in contact with the drainage sand will fall into the tundish. The drainage sand contains particles of refractory materials such as zirconia, and the fine particles are only a few microns, which will contaminate the molten steel. At the same time, there is air in the voids of the drainage sand and in the long nozzle before opening, which contains oxygen and nitrogen, and entering the molten steel in the tundish will contaminate the molten steel. In addition, a small part of the molten steel (about 15 kg) in the ladle that is in contact with the drainage sand is also contaminated by the drainage sand, which will also contaminate the molten steel in the tundish.

[0003] Therefore, excluding the drainage sand and the small part of the molten steel in the ladle that is in contact with the drainage sand from the molten steel in the tundish will significantly improve the purity of the molten steel. For this reason, people have made many attempts, but due to the strict restrictions of the opening operation between each continuous casting, there has always been no effective method. The so-called restrictions include: ① the time interval from releasing the drainage sand to closing the sliding plate is very short (required within 7 seconds); ② the maximum distance of the long nozzle from the molten steel surface in the tundish is only about 300 mm, and the operation space for handling the drainage sand is small; ③ the end of the long nozzle is below the tundish cover. Therefore, a ladle drainage sand removing device suitable for actual operation is needed.

[0004] A Chinese patent document with publication number CN221184694U discloses a ladle drainage sand taking device, the technical solution is: one end of the sand taking lever is hung with a slag bucket, the other end of the sand taking lever is fixed on the drum of the winch, the middle of the sand taking lever is slidingly connected to the arc-shaped roller; the steel wire rope of the winch is connected to the lower part of the slag bucket through a hook; the sand taking lever is slidingly connected to the arc-shaped roller through the roller and the support rod. This patent can take the ladle drainage sand, avoid or reduce the drainage sand entering the tundish, reduce or avoid the change of the metallurgical properties of the tundish covering agent, is conducive to the stability of the quality of the molten steel, and eliminates the safety hazards of manual drainage sand taking; the equipment is simple, safe and reliable.

[0005] The Chinese patent document with the publication number CN118023508A discloses a continuous casting ladle drainage sand removal device and method, comprising: a base, a rotating device and a rotating sand connecting device; the bottom end of the base is fixedly connected to a fixing piece at a working position; a rotating connecting piece is arranged at the top end of the base; the rotating device comprises a rotating tower rotatably connected to the top end of the base through the rotating connecting piece and a rotating tower driving mechanism connected to the rotating tower; the rotating sand connecting device comprises a rotating arm driving mechanism arranged on the rotating tower, a rotating arm connected to the driving end of the rotating arm driving mechanism and a sand connecting disc connected to the end of the rotating arm. The present application can solve the problems in the prior art, such as the need for manual operation, the existence of certain risks, the inability of the drainage sand structure to automatically shift when using a fixed drainage sand device without manual operation, and the easy occurrence of burning loss and other problems.

[0006] However, the above two patents have the following problems: ① The sand connecting device cannot be deepened to a position below the tundish cover, so it cannot connect sand at the long nozzle outlet and partially contaminated molten steel. It can only be connected at the lower nozzle, which requires closing the slide after connecting the drainage sand, connecting the long nozzle, and opening the slide. This greatly increases the possibility of nozzle solidification not being poured, seriously affecting the smooth production; ② It cannot handle the adhesion and condensation of molten steel that falls with the drainage sand; therefore, the treatment cost is high, and the recycling value cannot be greatly improved. Therefore, the above two patents cannot achieve the ideal effect and cannot meet the actual production needs. SUMMARY

[0007] According to the above technical problems, a ladle drainage sand connecting and removing device and method are provided. The present application mainly realizes the lifting and rotation of the sand connecting barrel through the rotating lifter, which can make the sand connecting barrel located directly below the long nozzle and separated from the contact with the molten steel flow and lifted above the tundish cover. When the sand connecting barrel is located directly below the long nozzle, it can receive the drainage sand and a small amount of molten steel released from the ladle, so that the drainage sand and the oxygen, nitrogen and other gases in the interstitial space are excluded from the molten steel, and the molten steel is no longer contaminated.

[0008] The technical means adopted by the present application are as follows: A ladle drainage sand connecting and removing device, comprising: a long nozzle manipulator and a sand connecting device, the long nozzle manipulator is installed on the tundish platform, the sand connecting device comprises a sand connecting barrel, a rotating lifter and a stand, the rotating lifter is installed on the cross arm of the long nozzle manipulator, the sand connecting barrel is connected below the stand, the upper part of the stand is connected with the rotating lifter, the rotating lifter has rotating and lifting functions, and is used to realize the rotation and lifting of the sand connecting barrel.

[0009] Further, the sand connecting barrel comprises a sand connecting barrel shell, and the inner wall of the sand connecting barrel shell is provided with a sand connecting barrel refractory lining.

[0010] Further, the sand receiving bucket is cylindrical, and the diameter of the internal cavity is 250-600 mm, and the depth is 200-500 mm.

[0011] Further, the sand receiving bucket is connected to the lower part of the column through a supporting ring.

[0012] The application also provides a working method of the ladle drainage sand receiving device, which comprises the following steps: Step 1: fixing the sand receiving device on the cross arm of the long nozzle manipulator through the rotary lifter; Step 2: before the ladle is opened for casting, the long nozzle manipulator is controlled to install the long nozzle on the lower nozzle of the ladle, and the rotary lifter is rotated to position the sand receiving bucket directly below the long nozzle; Step 3: 3-5 minutes before the ladle is replaced, argon is blown into the tundish to form a protective atmosphere; Step 4: the height of the ladle is lowered through the ladle rotating table, so that the lower end surface of the long nozzle is below the lower surface of the tundish cover, and the sand receiving bucket is above the protective slag surface and does not contact the protective slag surface; Step 5: the slide plate mechanism at the lower nozzle of the ladle is opened to release the drainage sand and the molten steel, and the drainage sand and a small amount of molten steel are sequentially dropped into the sand receiving bucket, so that the oxygen and nitrogen in the drainage sand and the interstices thereof are excluded from the molten steel and no longer pollute the molten steel; Step 6: after the drainage sand is completely discharged, the rotary lifter is automatically rotated to rotate the sand receiving bucket, so that the sand receiving bucket is separated from the contact with the molten steel flowing out of the long nozzle, and then the rotary lifter is raised to lift the sand receiving bucket to above the tundish cover; Step 7: after the ladle is finished casting, the long nozzle manipulator is operated to be separated from the ladle to a cleaning position, the long nozzle sealing bowl is cleaned and replaced, the drainage sand in the sand receiving bucket is poured out for recycling, and the next ladle casting is prepared.

[0013] Further, in step 2, the rotary lifter is perpendicular to the horizontal plane after the long nozzle is installed on the lower nozzle of the ladle.

[0014] Further, in step 2, the distance from the upper surface of the sand receiving bucket to the end of the long nozzle is 50-150 mm.

[0015] Further, in step 4, the lower end surface of the long nozzle is within the range of 10-300 mm below the lower surface of the tundish cover.

[0016] Compared with the prior art, the application has the following advantages: 1. The ladle sand receiving device and method provided by the present invention, through the setting of a rotary lifter, realizes the lifting and rotation of the sand receiving bucket, which can be positioned directly below the long nozzle and separated from the molten steel flow and rise above the tundish cover. When the sand receiving bucket is directly below the long nozzle, it can receive the sand and a small amount of molten steel released from the ladle, thereby removing the sand, the sand gaps and harmful gases in the long nozzle, as well as a small part of the molten steel in contact with the sand from the tundish molten steel, significantly improving the purity of the molten steel.

[0017] 2. The ladle sand removal device and method provided by the present invention have a short processing time and do not occupy the normal pouring time; they are easy to operate and safe; they can recycle the sand, reducing costs; and they can be applied on a large scale in industrial applications, which will generate great economic benefits.

[0018] Based on the above reasons, this invention can be widely applied in the field of ladle casting in continuous steel casting, ingot casting, and casting process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the operation of the ladle sand removal device of the present invention.

[0021] Figure 2 This is an assembly diagram of the sand receiving device of the present invention.

[0022] Figure 3 This is a structural diagram of the sand receiving device of the present invention.

[0023] Figure 4 This is a structural diagram of the sand receiving bucket of the present invention.

[0024] In the diagram: 1. Ladle; 2. Intermediate ladle; 3. Intermediate ladle cover; 4. Slag protection surface; 5. Molten steel; 6. Slide mechanism; 7. Long nozzle; 8. Intermediate ladle platform; 9. Long nozzle robot arm; 10. Sand receiving bucket; 11. Sand receiving device; 12. Rotary lifting device; 13. Support ring; 14. Column; 15. Sand receiving bucket outer shell; 16. Sand receiving bucket refractory lining. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0029] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0030] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0032] This invention provides a ladle sand removal device and method, applicable to ladle pouring in continuous steel casting, ingot casting, and casting processes. This invention can remove harmful gases from the sand, sand voids, and long nozzles, as well as a small portion of the molten steel in contact with the sand, from the tundish, significantly improving the purity of the molten steel. Simultaneously, it eliminates other adverse factors affecting smooth production, resulting in substantial economic benefits.

[0033] The present invention provides a ladle-driven sand collection and removal device, comprising a long-nozzle manipulator 9 and a sand collector 11, the structure of which and its use are as follows. Figures 1-3 As shown. The long-nozzle manipulator 9 is installed on the intermediate platform 8. The sand receiving device 11 consists of a sand receiving bucket 10, a rotary lifter 12, a support ring 13, and a column 14. The sand receiving bucket 10 is connected to the lower part of the column 14 via the support ring 13, and the upper part of the column 14 is connected to the rotary lifter 12. The sand receiving device 11 is fixed to the horizontal arm of the long-nozzle manipulator 9 via the rotary lifter 12, and the sand receiving device 11 moves together with the horizontal arm of the long-nozzle manipulator 9. The rotary lifter 12 has lifting and rotating functions, and can lift or rotate the rotary lifter 12 and its end accessories. The sand receiving bucket 10 consists of a sand receiving bucket shell 15 and a sand receiving bucket refractory material lining 16, as shown in the figure. Figure 4 As shown. The sand receiving bucket 10 is cylindrical, with an internal cavity diameter ranging from 250 to 600 mm and a depth ranging from 200 to 500 mm.

[0034] Figure 1In the middle, the outlet of the ladle 1 has a sliding plate mechanism 6, the upper end of the long outlet 7 is connected to the sliding plate mechanism 6, and the lower end is suspended. The top of the ladle 2 is provided with a ladle cover 3, which is used to hold molten steel 5. The upper liquid surface of the molten steel 5 is a protective slag surface 4.

[0035] The operation of this invention includes the following steps: 1. The sand receiving device 11 is fixed on the horizontal arm of the long water inlet manipulator 9 by means of the rotary lifting device 12. Its position characteristics are as follows: ① After the long water inlet 7 is installed on the water outlet of the ladle 1, the rotary lifting device 12 is perpendicular to the horizontal plane; ② By rotating the rotary lifting device 12, the sand receiving bucket 10 can be directly below the long water inlet 7; ③ The distance from the upper surface of the sand receiving bucket 10 to the end of the long water inlet 7 is 50~150mm. 2. Before pouring from ladle 1 during continuous casting, the long nozzle robot 9 is operated to install the long nozzle 7 on the lower nozzle of ladle 1, and the rotary lift 12 is rotated to position the sand receiving bucket 10 directly below the long nozzle 7. 3. 3-5 minutes before changing the package, blow argon gas into the middle package 2 to create a protective atmosphere; 4. Lower the height of ladle 1 by using the continuous casting ladle turret to make the lower end face of the long nozzle 7 located within 10~300mm below the lower surface of the tundish cover 3, while ensuring that the sand receiving bucket 10 is above the protective slag surface 4 and does not contact the slag surface. 5. Open the sliding plate mechanism 6 at the outlet of ladle 1 to release the guide sand and molten steel. The guide sand and a small amount of molten steel fall into the sand receiving bucket 10 one after another. In this way, the oxygen, nitrogen and other gases in the guide sand and its gaps are removed from the molten steel and no longer contaminate the molten steel. 6. After the draining sand is completely drained (approximately 1-3 seconds after the sliding plate mechanism 6 is activated), immediately rotate the rotary lift 12 automatically, which in turn rotates the sand receiving bucket 10, causing the sand receiving bucket 10 to detach from the molten steel flow from the long nozzle 7. Then raise the rotary lift 12, raising the sand receiving bucket 10 above the tundish cover 3; 7. After the pouring of this ladle 1 is completed, the long nozzle robot 9 is detached from the ladle 1 and moved to the cleaning position. The sealing bowl of the long nozzle 7 is cleaned and replaced, and the drainage sand in the sand receiving bucket 10 is emptied for recycling. Preparation is then made to perform the pouring of the next ladle 1.

[0036] Example 1 Continuous casting of automotive steel plates, a total of 6 ladles, with a steel ladle capacity of 260 tons.

[0037] The operation of this invention includes the following steps: 1. The sand receiving device 11 is fixed on the horizontal arm of the long sprue manipulator 9 via the rotary lifting device 12. Its positional characteristics are as follows: ① After the long sprue 7 is installed on the ladle outlet, the rotary lifting device 12 is perpendicular to the horizontal plane; ② By rotating the rotary lifting device 12, the sand receiving bucket 10 can be positioned directly below the long sprue 7; ③ The distance from the upper surface of the sand receiving bucket 10 to the end of the long sprue 7 is 100mm. The sand receiving bucket 10 is cylindrical, with an internal cavity diameter of 500mm and a depth of 350mm. 2. Before pouring from ladle 1 during continuous casting, the long nozzle robot 9 is operated to install the long nozzle 7 on the lower nozzle of ladle 1, and the rotary lift 12 is rotated to position the sand receiving bucket 10 directly below the long nozzle 7. 3. Three minutes before changing the package, blow argon gas into the middle package 2 to create a protective atmosphere; 4. Lower the height of ladle 1 by using the continuous casting ladle turret, so that the lower end face of the long nozzle 7 is about 200mm below the lower surface of the tundish cover 3, while ensuring that the sand receiving bucket 10 is above the protective slag surface 4 and does not come into contact with the slag surface. 5. Open the sliding plate mechanism 6 of ladle 1 to release the guide sand and molten steel. The guide sand and a small amount of molten steel fall into the sand receiving bucket 10 one after another. In this way, the oxygen, nitrogen and other gases in the guide sand and its gaps are removed from the molten steel and no longer contaminate the molten steel. 6. After the sand has been drained (approximately 2 seconds after the sliding plate mechanism 6 is activated), immediately rotate the rotary lift 12 automatically to separate the sand receiving bucket 10 from the molten steel flow from the long nozzle 7. Then raise the rotary lift 12 to raise the sand receiving bucket 10 above the tundish cover 3; 7. After the pouring of this ladle 1 is completed, the long nozzle robot 9 is detached from the ladle 1 and moved to the cleaning position. The sealing bowl of the long nozzle 7 is cleaned and replaced, and the drainage sand in the sand receiving bucket 10 is emptied for recycling. Preparation is then made to perform the pouring of the next ladle 1.

[0038] Testing revealed that the average total oxygen (purity index) content of the continuously cast billets from this casting batch was 0.0011%, while the average total oxygen content of the billets without dewatering sand removal was 0.0013%, resulting in a 15.4% improvement in steel purity. Furthermore, nitrogen addition in the molten steel was reduced by 0.0002%. 240 kg of dewatering sand was recovered, reducing costs by 600 yuan.

[0039] Example 2 Continuous casting of steel for household appliances, a total of 7 ladles, with a steel ladle capacity of 180 tons.

[0040] The operation of this invention includes the following steps: 1. The sand receiving device 11 is fixed on the horizontal arm of the long sprue manipulator 9 via the rotary lifting device 12. Its positional characteristics are as follows: ① After the long sprue 7 is installed on the ladle outlet, the rotary lifting device 12 is perpendicular to the horizontal plane; ② By rotating the rotary lifting device 12, the sand receiving bucket 10 can be positioned directly below the long sprue 7; ③ The distance from the upper surface of the sand receiving bucket 10 to the end of the long sprue 7 is 90mm. The sand receiving bucket 10 is cylindrical, with an internal cavity diameter of 450mm and a depth of 320mm. 2. Before pouring from ladle 1 during continuous casting, the long nozzle robot 9 is operated to install the long nozzle 7 on the lower nozzle of ladle 1, and the rotary lift 12 is rotated to position the sand receiving bucket 10 directly below the long nozzle 7. 3. 2.5 minutes before changing the package, blow argon gas into the middle package 2 to create a protective atmosphere; 4. Lower the height of ladle 1 by using the continuous casting ladle turret, so that the lower end face of the long nozzle 7 is about 150mm below the lower surface of the tundish cover 3, while ensuring that the sand receiving bucket 10 is above the protective slag surface 4 and does not come into contact with the slag surface. 5. Open the sliding plate mechanism 6 of ladle 1 to release the guide sand and molten steel. The guide sand and a small amount of molten steel fall into the sand receiving bucket 10 one after another. In this way, the oxygen, nitrogen and other gases in the guide sand and its gaps are removed from the molten steel and no longer contaminate the molten steel. 6. After the sand has been drained (approximately 2 seconds after the sliding plate mechanism 6 is activated), immediately rotate the rotary lift 12 automatically to separate the sand receiving bucket 10 from the molten steel flow from the long nozzle 7. Then raise the rotary lift 12 to raise the sand receiving bucket 10 above the tundish cover 3; 7. After the pouring of this ladle 1 is completed, the long nozzle robot 9 is detached from the ladle 1 and moved to the cleaning position. The sealing bowl of the long nozzle 7 is cleaned and replaced, and the drainage sand in the sand receiving bucket 10 is emptied for recycling. Preparation is then made to perform the pouring of the next ladle 1.

[0041] Testing revealed that the average total oxygen (purity index) content of the continuously cast billets from this casting batch was 0.0010%, while the average total oxygen content of the billets without dewatering sand removal was 0.0014%, resulting in a 21% improvement in steel purity. Furthermore, nitrogen addition in the molten steel was reduced by 0.00018%. 200 kg of dewatering sand was recovered, reducing costs by 500 yuan.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel ladle sand removal device, characterized in that, include: The long-sprue manipulator (9) and the sand receiver (11) are installed on the intermediate packaging platform (8). The sand receiver (11) includes a sand receiving bucket (10), a rotary lifter (12) and a column (14). The rotary lifter (12) is installed on the horizontal arm of the long-sprue manipulator (9). The sand receiving bucket (10) is connected to the bottom of the column (14). The top of the column (14) is connected to the rotary lifter (12). The rotary lifter (12) has rotation and lifting functions and is used to realize the rotation and lifting of the sand receiving bucket (10).

2. The ladle sand removal device according to claim 1, characterized in that, The sand receiving bucket (10) includes a sand receiving bucket shell (15), and the inner wall of the sand receiving bucket shell (15) is provided with a sand receiving bucket refractory material lining (16).

3. The ladle sand removal device according to claim 1, characterized in that, The sand receiving bucket (10) is cylindrical, with an internal cavity diameter of 250~600mm and a depth of 200~500mm.

4. The ladle sand removal device according to claim 1, characterized in that, The sand receiving bucket (10) is connected to the bottom of the column (14) via a support ring (13).

5. A method for operating the ladle sand removal device as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Fix the sand receiving device (11) onto the horizontal arm of the long water inlet manipulator (9) by rotating the lifting device (12); Step 2: Before pouring the steel ladle (1) during continuous casting, operate the long nozzle robot (9) to install the long nozzle (7) on the lower nozzle of the steel ladle (1), and rotate the rotary lift (12) to make the sand receiving bucket (10) directly below the long nozzle (7); Step 3: 3-5 minutes before changing the package, blow argon gas into the middle package (2) to form a protective atmosphere; Step 4: Lower the height of the ladle (1) by using the continuous casting ladle turret table so that the lower end face of the long nozzle (7) is below the lower surface of the tundish cover (3), and at the same time the sand receiving bucket (10) is above the protective slag surface (4) and does not contact the protective slag surface (4). Step 5: Open the sliding plate mechanism (6) at the outlet of the ladle (1) to release the diverting sand and molten steel. The diverting sand and a small amount of molten steel fall into the sand receiving bucket (10) one after another, so that the oxygen and nitrogen in the diverting sand and its gaps are removed from the molten steel and no longer contaminate the molten steel. Step 6: After the dredging sand is drained, immediately rotate the rotary lift (12) automatically, and then rotate the sand receiving bucket (10) so that the sand receiving bucket (10) is separated from the molten steel flow from the long water nozzle (7). Then raise the rotary lift (12) so that the sand receiving bucket (10) is raised above the tundish cover (3). Step 7: After the steel ladle (1) is poured, the long nozzle manipulator (9) is removed from the steel ladle (1) and moved to the cleaning position. The sealing bowl of the long nozzle (7) is cleaned and replaced, and the diversion sand in the sand receiving bucket (10) is poured out for recycling. The next steel ladle (1) is then prepared for pouring.

6. The working method of the ladle sand removal device according to claim 5, characterized in that, In step 2, after the long water inlet (7) is installed on the water outlet of the ladle (1), the rotating lifting device (12) is perpendicular to the horizontal plane.

7. The working method of the ladle sand removal device according to claim 5, characterized in that, In step 2, the distance from the upper surface of the sand receiving bucket (10) to the end of the long water outlet (7) is 50~150mm.

8. The working method of the ladle sand removal device according to claim 5, characterized in that, In step 4, the lower end face of the long water inlet (7) is located within a range of 10~300mm below the lower surface of the middle cover (3).

Images