Sand receiving device for ladle filler sand

Abstract

The utility model relates to a ladle filler sand receiving device, and belongs to the technical field of continuous casting production processes in the metallurgical industry. According to the technical scheme, the device comprises a steel ladle long nozzle (1), a sand receiving container (2), a center column (3), retention columns (4), a tundish (8) and side holes (10), the sand receiving container (2) is arranged in the tundish (8), the center column (3) and the multiple retention columns (4) are arranged in the sand receiving container (2), and the multiple retention columns (4) are evenly fixed in the circumferential direction of the sand receiving container (2); the steel ladle long nozzle (1) vertically extends into the tundish (8), the steel ladle long nozzle (1) is aligned with the central column (3) in the sand receiving container (2), and side holes (10) are symmetrically formed in the lower end, close to the sand receiving container (2), of the steel ladle long nozzle (1). The utility model has the beneficial effects that the ladle filler sand can be effectively prevented from entering the tundish, and the molten steel quality of the tundish is improved.

Description

Technical Field

[0001] The utility model relates to a ladle drainage sand connecting device, belonging to the technical field of continuous casting production process in the metallurgical industry. Background Art

[0002] In the continuous casting process, it is usually necessary to use ladle drainage sand for drainage, that is, to add drainage sand to the ladle upper nozzle. When the sliding nozzle slide is opened, the drainage sand falls due to the pressure of the molten steel, and the molten steel automatically flows out with the drainage sand. After the molten steel is automatically poured, the drainage sand will also enter the tundish. Due to the large size of the drainage sand, if it is not removed in time, it will react with the molten steel to form large inclusions in the steel, seriously polluting the molten steel and significantly deteriorating the quality of the ingot.

[0003] At present, most steel companies do not take measures to collect the flowing sand, allowing it to flow into the tundish. A few steel companies use shovels and other receiving vessels to collect the flowing sand manually before the molten steel flows out of the ladle. This collection method is simple, but the operation is poorly controllable and the labor intensity is high. If the sand receiving vessel is withdrawn too early and too little is collected, some of the flowing sand will flow into the tundish. If it is withdrawn too late, it is easy to burn the sand receiving vessel, causing molten steel to splash, which brings huge safety hazards to operators.

[0004] Chinese patent CN104690241A proposes a device to prevent drainage sand from entering the tundish of a continuous casting machine, including a nozzle opening control device, a drainage sand outlet, a long nozzle, and a drainage sand receiving device. The patent sets up drainage sand receiving devices and other equipment, which requires a large investment in equipment modification and is cumbersome to operate, and does not take into account the universal problem of the narrow space between the ladle and the tundish.

[0005] Chinese patent CN108620544A proposes a method for controlling the flow of drainage sand into the tundish during continuous casting, including blowing inert gas into the air-permeable water inlet block at the bottom of the ladle, opening the sliding water inlet for the first time, discharging the drainage sand, closing the sliding water inlet, and opening the sliding water inlet for the second time. This patent has the problem that after the drainage sand is discharged, the molten steel condenses with the slide plate, and the slide plate water inlet cannot be opened for the second time.

[0006] In view of this, the present invention proposes an automatic sand receiving device for ladle drainage sand, which can completely solve the technical problem of drainage sand flowing into the tundish, and is of great significance to the quality improvement of high-quality steel. Utility Model Content

[0007] The utility model aims to provide a ladle drainage sand receiving device, which can effectively prevent the ladle drainage sand from entering the tundish, improve the quality of molten steel in the tundish, and solve the problems existing in the background technology.

[0008] The technical solution of the utility model is:

[0009] A ladle drainage sand receiving device comprises a ladle long shroud, a sand receiving container, a center column, a retention column, a tundish and side holes, the sand receiving container is arranged in the tundish, the sand receiving container is provided with a center column and a plurality of retention columns, and the plurality of retention columns are evenly fixed in the circumferential direction of the sand receiving container; the ladle long shroud is vertically extended into the tundish, the ladle long shroud is aligned with the center column in the sand receiving container, and the ladle long shroud is provided with symmetrically arranged side holes near the lower end of the sand receiving container.

[0010] The central column in the sand receiving container is a T-shaped structure with a larger top and a smaller bottom.

[0011] The lower part of the central column in the sand receiving container is provided with carbon steel which is integrated with the central column.

[0012] The lower half of the sand receiving container is cylindrical, and the upper half is conical. A plurality of retention columns are evenly fixed on the inner wall of the conical upper half of the sand receiving container.

[0013] By adopting the utility model, after the ladle starts to be poured, the drainage sand is first filled into the sand receiving container through the long water outlet of the ladle. After the molten steel reaches the sand receiving container, the temperature drops sharply under the action of the carbon steel of the outer layer of the central column. At the same time, the retention column in the sand receiving container reduces the fluidity of the molten steel in the sand receiving container. The molten steel in the sand receiving container condenses to form a steel slag mixture, thereby preventing the drainage sand from floating up, and the following molten steel flows out from the side holes of the long water outlet into the tundish.

[0014] The utility model has the beneficial effects that during the casting process, the slag thickness of the tundish does not change, the sand receiving effect is remarkable, the ladle drainage sand is effectively prevented from entering the tundish, the cleanliness of the molten steel in the tundish is improved, and the quality of the ingot is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the utility model;

[0016] In the figure: ladle shroud 1, sand receiving container 2, center column 3, retention column 4, carbon steel 5, drainage sand 6, molten steel 7, tundish 8, steel-slag mixture 9, side hole 10. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0018] See attached Figure 1A ladle drainage sand receiving device comprises a ladle shroud 1, a sand receiving container 2, a center column 3, a retention column 4, a tundish 8 and a side hole 10. The sand receiving container 2 is arranged in the tundish 8. The sand receiving container 2 is provided with a center column 3 and a plurality of retention columns 4. The plurality of retention columns 4 are evenly fixed in the circumferential direction of the sand receiving container 2. The ladle shroud 1 extends vertically into the tundish 8. The ladle shroud 1 is aligned with the center column 3 in the sand receiving container 2. The ladle shroud 1 is provided with symmetrically arranged side holes 10 near the lower end of the sand receiving container 2.

[0019] In this embodiment, refer to the attached Figure 1 The center column 3 is a T-shaped structure with a larger top and a smaller bottom, which can play a buffering role for the drainage sand 6. The outer layer of the lower part of the center column 3 is provided with carbon steel 5, which is mainly used for cooling the molten steel.

[0020] The volume of sand receiving container 2 is 6500cm 3 The lower half is cylindrical, and the upper half is a conical shape with a small top and a large bottom. Several retention columns 4 are evenly fixed on the inner wall of the conical upper half of the sand receiving container 2 and arranged vertically to the inner wall. Its function is to reduce the fluidity of the molten steel 7 in the sand receiving container 2.

[0021] The side hole 10 at the lower end of the ladle shroud 1 is 20 cm high from the bottom. Before pouring steel, the ladle shroud 1 is inserted to a depth of 15 cm.

[0022] After the ladle starts pouring, the drainage sand 6 is filled into the sand receiving container 2 through the long shroud 1 of the ladle, and the molten steel fills the remaining volume of the sand receiving container 2. After the molten steel reaches the sand receiving container 2, the temperature drops sharply under the action of the outer carbon steel 5 of the central column 3. At the same time, the retention column 4 in the sand receiving container 2 reduces the fluidity of the molten steel in the sand receiving container 2. The molten steel in the sand receiving container 2 condenses to form a steel slag mixture 9, which prevents the drainage sand 6 from floating up, thereby achieving the purpose of automatic sand receiving at the long shroud of the ladle, and the subsequent molten steel flows out from the side holes 10 of the long shroud into the middle ladle.

Claims

1. A ladle drainage sand receiving device, characterized in that: The invention comprises a ladle shroud (1), a sand receiving container (2), a center column (3), a retention column (4), a tundish (8) and side holes (10); the sand receiving container (2) is arranged in the tundish (8); the sand receiving container (2) is provided with a center column (3) and a plurality of retention columns (4); the plurality of retention columns (4) are evenly fixed in the circumferential direction of the sand receiving container (2); the ladle shroud (1) extends vertically into the tundish (8); the ladle shroud (1) is aligned with the center column (3) in the sand receiving container (2); and the ladle shroud (1) is provided with symmetrically arranged side holes (10) near the lower end of the sand receiving container (2).

2. A ladle drainage sand receiving device according to claim 1, characterized in that: The central column (3) in the sand receiving container (2) is a T-shaped structure that is larger at the top and smaller at the bottom.

3. A ladle drainage sand receiving device according to claim 2, characterized in that: A carbon steel (5) which is integral with the central column (3) is provided at the lower part of the central column (3) in the sand receiving container (2).

4. The ladle drainage sand receiving device according to claim 1, characterized in that: The lower half of the sand receiving container (2) is cylindrical, and the upper half is conical, and a plurality of retention columns (4) are evenly fixed on the inner wall of the conical upper half of the sand receiving container (2).

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