T-shaped tundish deslagging device

Abstract

The utility model relates to a T-shaped tundish deslagging device, and belongs to the technical field of steelmaking equipment in the metallurgical industry. According to the technical scheme, the slag discharging device comprises a T-shaped tundish (1), slag discharging openings (2), slag sliding grooves (3), slag hoppers (4) and a flow stabilizer (12), the number of the slag discharging openings (2) is two, the two slag discharging openings (2) are formed in the positions, on the two sides of the flow stabilizer (12), of a tundish body of the T-shaped tundish (1) respectively, one slag sliding groove (3) and one slag hopper (4) are arranged below each slag discharging opening (2), the slag sliding grooves (3) are located between the slag discharging openings (2) and the slag hoppers (5), and the slag sliding grooves (3) are obliquely arranged. And a slag blocking wall (11) matched with the flow stabilizer (12) is arranged in the T-shaped tundish (1). The tundish slag removal device has the advantages that the flowing track of molten steel in a tundish can be improved, the retention time of the molten steel in the tundish is prolonged, floating removal of inclusions is promoted, and the slag removal efficiency of the tundish is improved.

Description

Technical Field

[0001] The utility model relates to a T-shaped tundish slag discharge device, belonging to the technical field of steelmaking equipment in the metallurgical industry. Background Art

[0002] The tundish is an indispensable and important container in the continuous casting process of molten steel, and it is also the last container in the steelmaking process. It mainly plays the role of stabilizing the flow of molten steel, removing inclusions, diverting and ensuring the continuous casting of molten steel. It is a refractory container used in steelmaking. It first receives the molten steel poured from the ladle, and then distributes it to each crystallizer by the tundish. According to the functional structure of the tundish, it can be divided into three parts: the first is the lining part, which includes the refractory material for the bottom and side walls of the container of the tundish, usually composed of an insulation layer, a permanent layer, a working layer and an impact pad. This part is the largest amount of refractory materials used in the tundish; the second is the slag filtering part, including slag retaining walls, slag retaining weirs, flow stabilizers, air curtains, ceramic filters, etc., the main function is to remove slag, purify molten steel, and improve the quality of steel; the third is the flow control part, which is composed of a stopper rod, a sizing nozzle, an immersion nozzle and a sliding nozzle, etc. It is a functional component of the tundish, controls the casting speed of molten steel, and meets production needs.

[0003] At present, the T-type tundish usually adopts the traditional flow stabilizer repair method, which mainly has the following problems:

[0004] (1) The slag discharge port of the T-type tundish is located in the impact zone of the tundish. The slag discharge method adopted is the impact zone slag discharge method. In actual production, the molten steel flows and diffuses from the impact zone into the molten pool, forming a slope with a high impact zone and a low molten pool. At the same time, the liquid level in the impact zone is unstable under the flushing of the large ladle flow, which is not conducive to the slag discharge in the impact zone of the tundish. The slag in the tundish cannot be discharged. At the same time, since the space between the crystallizer and the guard wall of the ladle turret is small, the capacity of the slag bucket is limited and it is not easy to replace it online. Therefore, the slag in the tundish cannot be discharged in time, which seriously restricts the service life of the tundish, the operation rate of the continuous casting machine and the metal recovery rate.

[0005] (2) The temperature of the molten steel in the middle stream of the tundish is 3-5°C higher than that of the molten steel in the two side streams, which is not conducive to the control of the temperature of the tundish. In addition, due to the high superheat of the molten steel in the middle casting stream, the low-multiple mass of the ingot is also worse than that of the two side casting streams;

[0006] (3) The molten steel in the tundish has a short residence time in the tundish, which results in the inability of inclusions to fully float up, making the inclusion control in the middle flow significantly more serious than that in the two side flows. Utility Model Content

[0007] The utility model aims to provide a T-type tundish slag discharge device, which can improve the flow trajectory of molten steel in the tundish, prolong the residence time of molten steel in the tundish, promote the floating removal of inclusions, improve the tundish slag discharge efficiency, and solve the problems existing in the background technology.

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

[0009] A T-type tundish slag discharge device comprises a T-type tundish, a slag discharge port, a slag chute, a slag bucket and a flow stabilizer. There are two slag discharge ports, which are respectively arranged on the T-type tundish body on both sides of the flow stabilizer. A slag chute and a slag bucket are provided below each slag discharge port. The slag chute is located between the slag discharge port and the slag bucket, and the slag chute is arranged inclined.

[0010] The slag chute is fixed on the bracket.

[0011] A slag retaining wall matched with the flow stabilizer is arranged in the T-shaped tundish.

[0012] The cross section of the slag retaining wall is U-shaped, and symmetrically arranged steel passing holes and slag discharge grooves are provided on both sides of the slag retaining wall, and the slag discharge grooves are located above the steel passing holes.

[0013] The steel holes symmetrically arranged on both sides of the slag retaining wall include two upper retaining wall holes and two lower retaining wall holes.

[0014] The slag discharge grooves are symmetrically arranged on both sides of the slag retaining wall and are located above the slag discharge wall and are U-shaped grooves.

[0015] A hoisting ring is arranged on the slag retaining wall.

[0016] The beneficial effects of the utility model are:

[0017] (1) Improve the slag discharge efficiency of the tundish;

[0018] (2) With the optimized slag retaining wall, the flow trajectory of molten steel in the six-strand tundish can be significantly improved, the residence time of molten steel in the tundish can be prolonged, and the floating removal of inclusions can be promoted;

[0019] (3) Reduce the erosion of molten steel on the retaining wall and reduce the risk of retaining wall collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a T-type tundish of the utility model;

[0021] Figure 2 This is a schematic diagram of slag discharge of the utility model;

[0022] Figure 3 This is a schematic diagram of the installation of the slag retaining wall of the utility model;

[0023] Figure 4This is the main view of the slag retaining wall of the utility model;

[0024] Figure 5 This is a side view of the slag retaining wall of the utility model;

[0025] Figure 6 This is a top view of the slag retaining wall of the utility model;

[0026] Figure 7 for Figure 6 AA section view;

[0027] In the figure: T-shaped tundish 1, slag discharge port 2, slag chute 3, slag bucket 4, bracket 5, supporting wall bricks 10, slag retaining wall 11, flow stabilizer 12, upper hole of retaining wall 13, lower hole of retaining wall 14, slag discharge chute 15, lifting ring 16. DETAILED DESCRIPTION

[0028] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0029] See attached Figure 1 , 2 A T-type tundish slag discharge device comprises a T-type tundish 1, a slag discharge port 2, a slag chute 3, a slag bucket 4 and a flow stabilizer 12. There are two slag discharge ports 2, which are respectively arranged on the T-type tundish 1 body on both sides of the flow stabilizer 12. A slag chute 3 and a slag bucket 4 are provided below each slag discharge port 2. The slag chute 3 is located between the slag discharge port 2 and the slag bucket 4, and the slag chute 3 is arranged inclined.

[0030] In this embodiment, refer to the attached Figure 1 , 2 The slag outlet 2 is 1039mm long, 370mm wide, 290mm deep, and 190mm away from the upper plane of the tundish. A movable slag chute 3 is set between the slag outlet 2 and the slag bucket 4, with a width of 180mm. The middle is built with grooved bricks to drain the slag in the tundish into the side slag bucket 4 in the middle.

[0031] According to the attached Figure 4-7 The mold for the slag retaining wall is made of aluminum-magnesium castable material, which is used after batching, dry mixing, wet mixing, pouring into the mold, vibration, demoulding, curing, and drying. During the manufacturing process of the slag retaining wall, the lifting ring 16 is poured into the slag retaining wall according to the size and position for easy lifting.

[0032] See attached Figure 3 The slag retaining wall 11 is hoisted into the T-shaped tundish 1 using the hoisting ring 16, and the joint between the slag retaining wall 11 and the T-shaped tundish 1 is sealed with fire clay.

Claims

1. A T-type tundish slag discharge device, characterized in that: The invention comprises a T-shaped tundish (1), a slag discharge port (2), a slag chute (3), a slag bucket (4) and a flow stabilizer (12). The two slag discharge ports (2) are respectively arranged on the T-shaped tundish (1) body on both sides of the flow stabilizer (12). A slag chute (3) and a slag bucket (4) are arranged below each slag discharge port (2). The slag chute (3) is located between the slag discharge port (2) and the slag bucket (4). The slag chute (3) is arranged in an inclined manner.

2. A T-type tundish slag discharge device according to claim 1, characterized in that: The slag chute (3) is fixed on the bracket (5).

3. A T-type tundish slag discharge device according to claim 1 or 2, characterized in that: The T-shaped tundish (1) is provided with a slag retaining wall (11) that matches the flow stabilizer (12).

4. A T-type tundish slag discharge device according to claim 3, characterized in that: The cross section of the slag retaining wall (11) is U-shaped, and symmetrically arranged steel through holes and slag discharge grooves (15) are provided on both sides of the slag retaining wall (11), and the slag discharge grooves (15) are located above the steel through holes.

5. A T-type tundish slag discharge device according to claim 4, characterized in that: The steel holes symmetrically arranged on both sides of the slag retaining wall (11) include two retaining wall upper holes (13) and two retaining wall lower holes (14).

6. A T-type tundish slag discharge device according to claim 4, characterized in that: The slag discharge grooves (15) are symmetrically arranged on both sides of the slag retaining wall (11) and are located above the slag discharge wall and are U-shaped grooves.

7. The T-type tundish slag discharge device according to claim 3, characterized in that: The slag retaining wall (11) is provided with a lifting ring (16).

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