A slag skimming device for a ladle

Abstract

The utility model provides a kind of ladle slag salvaging device, belong to metallurgical equipment technical field, including two symmetrical vertical arrangement in rotary support inside rotary shaft, the bottom of each rotary shaft is provided with slag rake, while the top of each rotary shaft is provided with the driving device of driving rotary shaft rotation, rotary support is connected with the telescopic device of driving rotary support horizontal movement, telescopic device is connected with the lifting device of driving telescopic device and rotary support vertical movement.The utility model in the present application is provided with rotary shaft and driving device, can make two independent rake body free angle open, cover ladle full surface;The utility model can be according to the thickness of slag in ladle, the position of slag salvaging device is adjusted in three-dimensional direction by lifting device and telescopic device, and the suspended vanadium slag in molten iron is salvaged;The utility model can realize that the inclination angle of ladle is reduced by 30%, the technical effect that metal loss is reduced to <2%, and simultaneously the slag salvaging period is shortened by 5%, and the slag salvaging rate is improved from 80% to 92%.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical equipment technology, and in particular relates to a slag removal device for molten iron ladle. Background Technology

[0002] In the current field of vanadium slag extraction, converter vanadium extraction technology is mostly used. This technology involves tapping the steel after slag blowing in the converter, then pouring the remaining slag into a slag pot to obtain vanadium slag. However, this technology has significant drawbacks: the vanadium slag mixes with the steelmaking slag, leading to an increased slag volume and a lower V₂O₅ content.

[0003] When adopting the self-developed new vanadium extraction process using molten iron ladles, vanadium is extracted by blowing slag inside the ladle. The blown vanadium slag floats on the surface of the ladle and needs to be collected. However, since the vanadium slag cannot be collected by simply dumping slag from the ladle, a slag remover is currently the primary method. While the current slag removal process from the ladle is relatively efficient, employing a slag remover with a built-in transmission device that drives a slag rake in a horizontal reciprocating motion, the process involves tilting the ladle at a certain angle and then using the slag remover to remove the floating slag, which falls into a slag basin. However, the slag remover is limited by the size of the ladle's inner diameter and the size of the slag remover plate, resulting in a small plate size and a limited area for a single slag removal operation, leading to low efficiency. Furthermore, to ensure thorough cleaning of the floating slag inside the ladle, the tilting angle needs to be increased, which results in some molten iron loss during the slag removal process, thus increasing production costs. Utility Model Content

[0004] This invention addresses the problem of low slag removal efficiency in slag removers and the resulting loss of molten iron during the slag removal process. It provides a slag removal device for molten iron ladles, enabling 360° rotating slag removal with precise depth control, reducing the ladle tilt angle, and increasing the slag removal rate to over 92%.

[0005] The technical solution adopted by this utility model for a slag removal device for molten iron ladles is as follows:

[0006] A slag removal device for molten iron ladles includes two symmetrically arranged vertically within a slewing support. Each slewing support is equipped with a slag rake at its bottom and a drive device for rotating the slewing support is equipped with a top of each slewing support. The slewing support is connected to a telescopic device for horizontal movement of the slewing support, and the telescopic device is connected to a lifting device for vertical movement of the slewing support.

[0007] A further improvement of the present invention is that the slag rake includes two independent rake bodies, which are respectively fixed to the bottom ends of two rotating shafts.

[0008] A further improvement of this utility model is that the horizontal rotation angle of each independent rake body is in the range of 0-180°, and the combined opening angle of the two independent rake bodies is 0-360°.

[0009] A further improvement of the present invention is that each of the independent rake bodies includes a rake plate arranged in an arc shape, and the top of the rake plate is provided with a plurality of rake teeth arranged in a wave shape; wherein the tooth spacing between two adjacent rake teeth is 50-80mm.

[0010] A further improvement of the present invention is that the end of the rake plate away from the corresponding rake tooth is fitted onto the rotating shaft via a bushing, and the bushing and the rotating shaft are connected by a key.

[0011] A further improvement of the present invention is that the slewing support includes a rotating platform with a bearing seat, and each slewing shaft is fitted with a slewing bearing mounted on the bearing seat.

[0012] A further improvement of this utility model is that the stroke of the lifting device is 800-1200mm.

[0013] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0014] This invention, through the provided rotating shaft and driving device, allows two independent rake bodies to open freely at various angles, covering the entire surface of the molten iron ladle. Based on the thickness of the slag in the ladle, the position of the slag-removing device can be adjusted in three dimensions using a lifting and telescopic device to remove suspended vanadium slag from the molten iron. This invention, through the provided lifting and telescopic device, achieves the technical effect of reducing the ladle tilt angle by 30% and metal loss to <2%, while shortening the slag removal cycle by 5% and increasing the slag removal rate from 80% to 92%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a slag removal device for molten iron ladles provided by this utility model.

[0016] In the attached diagram: 1. Rotary shaft; 2. Drive device; 3. Rotary support; 4. Slag rake; 5. Lifting device; 6. Telescopic device. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0018] First refer to Figure 1 As can be seen, this utility model includes two symmetrically arranged vertically rotating shafts 1 within a rotating support 3. Each rotating shaft 1 has a slag rake 4 at its bottom, comprising two independent rake bodies, one on the left and one on the right. These two independent rake bodies are respectively fixed to the bottom ends of the two rotating shafts 1. The horizontal rotation angle of each independent rake body ranges from 0 to 180°, and the combined opening angle of the two independent rake bodies ranges from 0 to 360°. Each independent rake body also includes an arc-shaped rake plate, with multiple rake teeth arranged in a wave-like pattern at the top. The tooth spacing between adjacent rake teeth is 50-80 mm. Specifically, the end of the rake plate furthest from the corresponding rake tooth is fitted onto the rotating shaft 1 via a bushing, and the bushing is connected to the rotating shaft 1 via a key.

[0019] The aforementioned slewing support 3 includes a rotating platform on which a bearing housing is fixedly mounted. Each slewing shaft 1 vertically penetrates the bearing housing, and a slewing shaft 1 bearing is fixed to the bearing housing at the position corresponding to each slewing shaft 1. In this embodiment, the slewing shaft 1 bearing is a four-point contact ball slewing bearing, with the outer ring fixed to the bearing housing and the inner ring fixedly sleeved on the slewing shaft 1 to support the rotation of the slewing shaft 1.

[0020] Meanwhile, in this invention, each rotary shaft 1 is equipped with a drive device 2 at its top to drive the rotary shaft 1 to rotate. That is, there are two drive devices 2, each corresponding to one of the two rotary shafts 1. In this embodiment, the drive device 2 can be a servo motor or hydraulic motor commonly used in the prior art. A driven wheel is fixedly sleeved on the top of each rotary shaft 1, and a driving wheel is fixedly sleeved on the output shaft of the servo motor or hydraulic motor. The driving wheel meshes with the corresponding driven wheel, thereby driving the driving wheel and the driven wheel to rotate through the servo motor or hydraulic motor, thereby driving the rotary shaft 1 and the independent rake body to rotate horizontally.

[0021] In this invention, the slewing support 3 is connected to a telescopic device 6 that drives the slewing support 3 to move horizontally. The telescopic device 6 is connected to a lifting device 5 that drives the telescopic device 6 and the slewing support 3 to move vertically. In this embodiment, the telescopic device 6 can be a slide rail mechanism or telescopic arm commonly used in the prior art, driving the slewing shaft 1, the drive device 2, the slewing support 3, and the slag rake 4 to move horizontally. At the same time, in this embodiment, the lifting device 5 can be a hydraulic cylinder or an electric push rod commonly used in the prior art, driving the slewing shaft 1, the drive device 2, the slewing support 3, the slag rake 4, and the telescopic device 6 to move vertically, and the lifting stroke of the lifting device 5 is 800-1200mm.

[0022] The working principle of the slag removal device in this embodiment is as follows: When it is necessary to remove vanadium slag from the molten iron ladle, firstly, based on the thickness of the vanadium slag in the ladle, the lifting device 5 is activated, driving the rotating shaft 1, drive device 2, rotating support 3, slag rake 4, and telescopic device 6 to move vertically, so that the slag rake 4 is inserted to a suitable depth on the slag surface. Next, observing the floating position of the vanadium slag on the molten iron surface, the drive device 2 drives the rotating shaft 1 to rotate, causing the left and right independent rakes to rotate horizontally. Since the left and right independent rakes can rotate individually within the range of 0-180°, and the two independent rakes can open at any angle from 0-360°, the position and opening angle of the independent rakes can be flexibly adjusted to adapt to vanadium slag in different positions. In the horizontal direction, if it is necessary to further adjust the position of the slag rake 4, the telescopic device 6 can be activated, driving the rotating shaft 1, drive device 2, rotating support 3, and slag rake 4 to move horizontally, so that the slag rake 4 accurately reaches the location of the vanadium slag. Then, through the rotation and movement of the slag rake 4, the vanadium slag is scraped out and collected. Throughout the process, the device can be flexibly adjusted according to the actual situation to achieve efficient slag removal, greatly improving slag removal efficiency and reducing molten iron loss and production costs.

[0023] In the above embodiments, this utility model provides a slag removal device for molten iron ladles. Through the provided rotary shaft and driving device, two independent rake bodies can be opened at a free angle to cover the entire surface of the molten iron ladle. This utility model can adjust the position of the slag removal device in three dimensions according to the thickness of the slag in the molten iron ladle through a lifting device and a telescopic device to remove the vanadium slag suspended in the molten iron. This utility model, through the provided lifting and telescopic devices, can achieve the technical effect of reducing the inclination angle of the molten iron ladle by 30% and reducing metal loss to <2%, while shortening the slag removal cycle by 5% and increasing the slag removal rate from 80% to 92%.

[0024] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A slag removal device for molten iron ladles, characterized in that: It includes two symmetrically arranged vertically rotating shafts (1) in the rotating support (3). Each rotating shaft (1) is equipped with a slag rake (4) at its bottom and a driving device (2) for driving the rotating shaft (1) to rotate at its top. The rotating support (3) is connected to a telescopic device (6) for driving the rotating support (3) to move horizontally. The telescopic device (6) is connected to a lifting device (5) for driving the telescopic device (6) and the rotating support (3) to move vertically.

2. The slag removal device for molten iron ladle according to claim 1, characterized in that: The slag rake (4) includes two independent rake bodies on the left and right, which are respectively fixed to the bottom ends of two rotating shafts (1).

3. The slag removal device for molten iron ladle according to claim 2, characterized in that: The horizontal rotation angle of each independent rake body is in the range of 0-180°, and the combined opening angle of two independent rake bodies is 0-360°.

4. The slag removal device for molten iron ladle according to claim 2, characterized in that: Each of the independent rake bodies includes an arc-shaped rake plate, and the top of the rake plate is provided with multiple rake teeth arranged in a wave-like pattern; wherein the tooth spacing between two adjacent rake teeth is 50-80mm.

5. The slag removal device for molten iron ladle according to claim 4, characterized in that: The end of the rake plate away from the corresponding rake tooth is fitted onto the rotating shaft (1) via a bushing, and the bushing and the rotating shaft (1) are connected by a key.

6. The slag removal device for molten iron ladle according to claim 1, characterized in that: The slewing support (3) includes a rotating platform with a bearing seat, and each slewing shaft (1) is fitted with a slewing bearing mounted on the bearing seat.

7. The slag removal device for molten iron ladle according to claim 1, characterized in that: The stroke of the lifting device (5) is 800-1200mm.

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