A tundish into which inert gas can be injected

Abstract

The utility model discloses a kind of inert gas injectable tundish, it is related to metallurgical equipment technical field, comprising: shell, its inside fixedly arranged with dam wall, the lower wall of the side away from dam wall is equipped with liquid outlet;Upper cover, disassembly connection is above shell, its one side is equipped with liquid inlet, the other side is equipped with multiple air inlet holes;Joint, plug-in is in liquid inlet, its inside is equipped with through-hole, liquid discharge pipe of molten steel can be inserted into through-hole, multiple exhaust grooves are annularly arrayed on the side wall of through-hole;Dam wall and upper cover between are equipped with the passage for gas passing, the utility model can make shell be in semi-closed state by being equipped with upper cover, inert gas can be injected into shell by air inlet hole, by continuously injecting inert gas into shell, it can make shell be in positive pressure state, inert gas can be overflowed outward by exhaust groove, avoid external air to enter into shell, avoid molten steel and air contact oxidation reaction.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically to an intermediate ladle that can be injected with inert gas. Background Technology

[0002] The tundish is a refractory container used in short-process steelmaking. It first receives molten steel poured from the ladle, and then distributes it to various crystallizers through the tundish nozzle. As an important basic raw material, steel plays a pivotal role in the economic development of countries around the world.

[0003] For example, the utility model patent with announcement number CN208528079U discloses a slag-blocking dam for continuous casting tundish. A slag-blocking wall is provided on the inner side of the continuous casting tundish, and a first slag-blocking dam and a second slag-blocking dam are provided at the bottom of the continuous casting tundish. Both the first slag-blocking dam and the second slag-blocking dam are provided with guide holes at the bottom. One end of the guide hole is provided with a guide hole insulated, which is fixedly connected to the first slag-blocking dam and the second slag-blocking dam. A blocking steel plate is provided at one end of the guide hole. Magnesium ore is provided at one end of both the first slag-blocking dam and the second slag-blocking dam. A ladle bottom working lining is provided at one end of the magnesium ore, which is connected to the first slag-blocking dam and the second slag-blocking dam through the magnesium ore. A recess is provided at one end of the continuous casting tundish, and a pouring port is provided at the end of the recess.

[0004] However, most existing tundishes are of the trough type, which allows external air to come into contact with molten steel at will through the upper port. This causes the molten steel to come into contact with oxygen in the air and produce an oxidation reaction, which affects the quality of the molten steel. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an intermediate package that can be injected with inert gas, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an intermediate package capable of being injected with inert gas, comprising:

[0007] The shell has a slag-blocking wall fixedly installed inside, and a liquid outlet is opened on the lower wall on the side away from the slag-blocking wall.

[0008] The top cover is detachably connected to the top of the housing, with a liquid inlet on one side and multiple air inlets on the other side;

[0009] The connector is inserted into the liquid inlet and has a through hole inside. The drain pipe of molten steel can be inserted into the through hole. Multiple venting grooves are arranged in a ring on the side wall of the through hole.

[0010] A channel for gas to pass through is provided between the slag retaining wall and the upper cover.

[0011] Preferably, the area above the through hole has a bucket-shaped structure.

[0012] Preferably, the channel is a plurality of ventilation holes formed at the edge of the slag retaining wall.

[0013] Preferably, an air distribution cylinder is fixedly installed on the top of the housing, and the plurality of air inlets are all connected to the air distribution cylinder, and an air supply pipe is connected to the air distribution cylinder.

[0014] Preferably, the outer side of the connector is provided with a stepped platform with a diameter larger than that of the liquid inlet.

[0015] Beneficial effects

[0016] This invention provides an tundish that can be injected with inert gas, which has the following advantages: the device can be in a semi-closed state by setting a top cover, and inert gas can be injected into the shell through the air inlet. By setting multiple air inlets and multiple vents, dead zones for gas flow can be avoided. When the molten steel drain pipe is connected to the through hole, the shell can be kept under positive pressure by continuously injecting inert gas into the shell. The inert gas can overflow outward through the exhaust groove, preventing external air from entering the shell. At the same time, the molten steel can always be surrounded by inert gas, preventing oxidation reaction when the molten steel comes into contact with air, thus improving the quality of the molten steel and reducing the generation of slag. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a three-dimensional exploded view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the connector.

[0021] In the diagram: 1. Shell; 2. Top cover; 3. Slag retaining wall; 4. Liquid outlet; 5. Liquid inlet; 6. Connector; 7. Through hole; 8. Exhaust trough; 9. Air inlet; 10. Air distribution cylinder; 11. Air supply pipe; 12. Vent hole. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figures 1-4This utility model provides a technical solution: an intermediate ladle that can be injected with inert gas, comprising: a shell 1, which has a slag-blocking wall 3 fixedly installed inside, and a liquid outlet 4 opened on the lower wall away from the slag-blocking wall 3; a top cover 2, detachably connected to the top of the shell 1, which has a liquid inlet 5 on one side and multiple air inlets 9 on the other side, through which inert gas can be injected into the shell 1, and at the same time, the inert gas can enter the shell 1 more evenly; a connector 6, inserted into the liquid inlet 5, which has a through hole 7 inside, through which the molten steel drain pipe can be inserted; multiple exhaust grooves 8 are arranged in a ring on the side wall of the through hole 7, so that when the molten steel drain pipe is inserted into the through hole 7, the inert gas in the shell 1 can be discharged through the multiple exhaust grooves 8. By continuously injecting inert gas into the shell 1, a positive pressure is formed inside, and by continuously venting the inert gas outward, external air is prevented from entering the shell 1; a channel for gas passage is provided between the slag-blocking wall 3 and the top cover 2 to ensure that the gas on both sides of the slag-blocking wall 3 can flow smoothly.

[0024] As one embodiment of this utility model, the upper part of the through hole 7 has a bucket-shaped structure, which facilitates connection with the drain pipe of molten steel.

[0025] As an embodiment of this utility model, the channel consists of multiple vent holes 12 opened at the upper edge of the slag retaining wall 3 to prevent inert gas from creating dead flow angles when passing through the slag retaining wall 3.

[0026] As an embodiment of this utility model, an air distribution cylinder 10 is fixedly provided on the outer side of the upper part of the housing 1, and multiple air inlets 9 are connected to the air distribution cylinder 10. An air supply pipe 11 is connected to the air distribution cylinder 10.

[0027] As an embodiment of this utility model, the outer side of the connector 6 is provided with a stepped platform 13 with a diameter larger than that of the liquid inlet 5.

[0028] The working principle and usage process of this utility model are as follows: In use, the molten steel drain pipe is connected to the through hole 7 and the molten steel is discharged. When the molten steel flows to the outlet 4, the outward flow of the molten steel can prevent external air from entering the shell 1 through the outlet 4. The gas supply pipe 11 is connected to an external inert gas supply system. The external inert gas supply system can inject inert gas into the shell 1, so that the shell 1 is in a positive pressure state. The gas in the shell 1 can be discharged from the shell 1 through the exhaust groove 8, so that the molten steel is always surrounded by inert gas, avoiding the oxidation reaction caused by the molten steel contacting oxygen in the air, ensuring the quality of the molten steel, and reducing the generation of slag.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intermediate package capable of being injected with an inert gas, characterized in that, include: The shell (1) has a slag-blocking wall (3) fixedly installed inside it, and a liquid outlet (4) is opened on the lower wall away from the slag-blocking wall (3); The top cover (2) is detachably connected to the top of the housing (1), with a liquid inlet (5) on one side and multiple air inlets (9) on the other side; The connector (6) is inserted into the liquid inlet (5), and a through hole (7) is provided inside it. The drain pipe of molten steel can be inserted into the through hole (7). Multiple exhaust grooves (8) are arranged in a ring on the side wall of the through hole (7). A channel for gas to pass through is provided between the slag retaining wall (3) and the upper cover (2).

2. The intermediate package capable of being injected with inert gas according to claim 1, characterized in that, The top of the through hole (7) has a bucket-shaped structure.

3. The intermediate package capable of being injected with inert gas according to claim 1, characterized in that, The channel is a plurality of ventilation holes (12) opened at the upper edge of the slag retaining wall (3).

4. The intermediate package capable of being injected with inert gas according to claim 1, characterized in that, An air distribution cylinder (10) is fixedly installed on the top of the housing (1), and multiple air inlets (9) are connected to the air distribution cylinder (10). An air supply pipe (11) is connected to the air distribution cylinder (10).

5. An intermediate package capable of being injected with inert gas according to claim 1, characterized in that, The connector (6) has a stepped platform on the outside with a diameter larger than that of the liquid inlet (5).

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