Steel ladle structure capable of preventing slag entrapment of molten steel

Abstract

The utility model relates to a steel ladle structure for preventing slag entrapment of molten steel, which comprises a ladle body (1) and a ladle cover (2), a water gap (6) is arranged at the bottom of the ladle body (1), the ladle cover (2) is arranged at a top opening of the ladle body (1) and is used for sealing the ladle body (1), and the steel ladle structure is characterized in that a floating body (3) is suspended in the ladle body (1) and floats at the interface position of the molten steel and the slag, and the water gap (6) is arranged at the bottom of the ladle body (1). And the floating body (3) descends along with the lowering of the liquid level of the molten steel. The steel ladle structure can be directly improved on the basis of an existing steel ladle structure, slag entrapment and air suction can be avoided, the purity of molten steel can be guaranteed, the metal yield is increased, practicability is high, and application and popularization are convenient.

Description

Technical Field

[0001] The utility model relates to a ladle structure. Background Art

[0002] Continuous casting is the last process of steelmaking. The purity of the molten steel in the ladle directly affects the internal quality of the ingot. When the liquid level of the molten steel reaches the critical swirling height in the later stage of pouring, a converging vortex will be formed at the water inlet. Under the action of the vortex force, the slag will be mixed into the middle ladle, resulting in macro inclusions in the ingot. At present, there are two main methods to solve the swirling of molten steel: one is the structural modification of the ladle, which requires the cooperation with the ladle manufacturer to design the bottom of the ladle. This method is relatively complicated to implement. Although it can effectively suppress the vortex, it has a great impact on the structure of the ladle, and the installation and commissioning work is time-consuming and laborious; the other is to install a slag detection system. When the molten steel is detected to have slag rolling, the slide plate will be closed immediately to prevent the slag from mixing into the casting stream. This method is widely used but cannot improve the molten steel yield. Utility Model Content

[0003] In view of the above-mentioned prior art, the purpose of the utility model is to provide a ladle structure for preventing molten steel from swirling slag, thereby inhibiting the swirling slag of the molten steel by interfering with the flow state of the molten steel.

[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: a ladle structure for preventing slag from rolling up in molten steel, comprising a ladle body and a ladle cover, wherein the bottom of the ladle body has a water inlet, and the ladle cover is arranged at the top of the ladle body and is open for sealing the ladle body, and is characterized in that a floating body is suspended in the ladle body, the floating body floats at the interface between molten steel and slag, and the floating body descends as the liquid level of the molten steel decreases.

[0005] Preferably, the floating body is in an inverted cone shape.

[0006] Preferably, the floating body is suspended by a rope (thin steel wire), one end of the rope is connected to the floating body, and the other end passes through the cover, and the rope is retracted and released to realize the lifting and lowering of the floating body.

[0007] Preferably, it also includes a rotating shaft, which is driven to rotate, and the rope is wound around the rotating shaft. The rotating shaft rotates to achieve the retraction and release of the rope.

[0008] Preferably, the rope is a thin steel wire rope with a diameter of 6 mm.

[0009] Preferably, the float is a carbon-magnesia refractory material having a density between that of molten steel and slag.

[0010] Preferably, the float corresponds to the water outlet up and down.

[0011] Preferably, there are multiple floating bodies, one of which corresponds to the water outlet above and below, and the rest are arranged around the water outlet.

[0012] Compared with the prior art, the advantages of the utility model are: the ladle structure involved in the present application can be modified on the basis of the existing ladle structure, and the modification is simple, which can not only avoid the inhalation of slag rolls and air to ensure the purity of molten steel, but also improve the metal recovery rate. When used in combination with the slag detection system, the effect is significant, the practicability is strong, and it is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the ladle in the embodiment of the utility model;

[0014] Figure 2 It is a floating body lifting structure in the embodiment of the utility model;

[0015] In the figure, 1-package body, 2-package cover, 3-floating body, 4-thin steel wire, 5-rotating shaft, 6-water inlet. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings. The embodiments are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The text description in this embodiment corresponds to the accompanying drawings, and the description of the orientation is also based on the description of the accompanying drawings, and should not be understood as limiting the scope of protection of the present invention.

[0017] like Figure 1 As shown, this embodiment relates to a ladle structure for preventing slag from rolling up in molten steel, which includes a ladle body 1, a ladle cover 2, a rope, a float 3, and a rotating shaft 5. The ladle body 1 has a water inlet 6 at the bottom, the ladle cover 2 is arranged at the top of the ladle body 1 and is open for sealing the ladle body 1, and the float 3 is a carbon-magnesia refractory material with a density between that of molten steel and slag, and can float on the interface between the molten steel and the slag.

[0018] The floating body 3 is in an inverted cone shape and is suspended in the bag body 1 by a rope. The rope is a thin steel wire rope with a diameter of 6 mm, one end of which is connected to the floating body 3 and the other end passes through the bag cover 2. The floating body 3 corresponds to the water inlet 6 up and down. The rotating shaft 5 is located outside the bag body 1. The rotating shaft 5 is driven to rotate, such as by a rotating motor. The rope is wound around the rotating shaft 5, and the rotating shaft 5 rotates to realize the retraction and release of the rope.

[0019] The above-mentioned ladle structure can directly improve the existing ladle structure: Preparation work: open a small hole in the ladle cover, and install the utility model tool through the small hole with a steel wire rope. The connection of the auxiliary tool is made of an alloy steel wire with a diameter of 6mm, which is resistant to high temperature and not easy to be damaged. The float suspended in the ladle is a carbon-magnesium refractory material, and the high-temperature density is between the molten steel and the slag, which is conducive to being completely maintained on the surface of the molten steel and preventing slag rolling. The rotating shaft controls the length of the steel wire rope to be lowered, and the staged lowering ensures that the implementation of the utility model meets the actual production requirements and prevents the one-time impact external force from causing the molten steel to be mixed. When the auxiliary tool is lowered in the middle and late stages, based on density and weight considerations, the float will float on the surface of the molten steel. By operating the rotating shaft to lower the length of the steel wire rope, the generation of the vortex of the late convergence of the molten steel can be effectively prevented, thereby realizing the effective control of the slag under the ladle. The utility model can effectively control the slag rolling of the molten steel in the important stage of molten steel being drawn into a casting, improve the purity of the molten steel, ensure that the molten steel is drawn and poured evenly and fully, and avoid internal quality problems such as inclusions, local cracks, and looseness caused by slag.

[0020] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A ladle structure for preventing slag from rolling up in molten steel, comprising a ladle body (1) and a ladle cover (2), wherein the ladle body (1) has a water inlet (6) at the bottom, and the ladle cover (2) is arranged at the top of the ladle body (1) and is open for sealing the ladle body (1), characterized in that: A floating body (3) is suspended in the ladle (1), and the floating body (3) floats at the interface between molten steel and slag. The floating body (3) descends as the level of the molten steel decreases.

2. The ladle structure for preventing slag from rolling up in molten steel according to claim 1, characterized in that: The floating body (3) is in the shape of an inverted cone.

3. The ladle structure for preventing slag from rolling up in molten steel according to claim 1, characterized in that: The floating body (3) is suspended by a rope, one end of the rope is connected to the floating body, and the other end passes through the cover, and the rope is retracted and released to realize the lifting and lowering of the floating body.

4. The ladle structure for preventing slag from rolling up in molten steel according to claim 3, characterized in that: The utility model also comprises a rotating shaft (5), wherein the rotating shaft (5) is driven to rotate, the rope is wound around the rotating shaft (5), and the rotating shaft rotates to realize the retraction and release of the rope.

5. The ladle structure for preventing slag from rolling up in molten steel according to claim 3, characterized in that: The rope is a thin steel wire rope (4) with a diameter of less than 6 mm.

6. The ladle structure for preventing slag from rolling up in molten steel according to claim 1, characterized in that: The floating body is a carbon-magnesia refractory material with a density between that of molten steel and slag.

7. The ladle structure for preventing slag from rolling up in molten steel according to claim 1, characterized in that: The floating body (3) corresponds to the water inlet (6) in upper and lower positions.

8. The ladle structure for preventing slag from rolling up in molten steel according to claim 1, characterized in that: There are a plurality of floating bodies (3), one of which corresponds to the water inlet (6) above and below, and the rest are arranged around the water inlet (6).

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