Argon protection device for lower nozzle of lower pouring steel ingot steel ladle

Abstract

The utility model relates to an argon protection device for a lower pouring steel ingot ladle collector nozzle, and belongs to the technical field of die casting production in the metallurgical industry. According to the technical scheme, the device comprises a steel ladle collector nozzle (1), a sealing cover (2) and a central injection pipe (3), the sealing cover (2) is arranged between the steel ladle collector nozzle (1) and the central injection pipe (3), a center hole (5) matched with the steel ladle collector nozzle (1) is formed in the center of the sealing cover (2), the sealing cover (2) is provided with two circles of air chambers around the center hole (5), and the two circles of air chambers are communicated through a communication channel (8). Wherein one circle of gas chamber is communicated with an argon pipeline (9), and a nozzle (10) is arranged below the other circle of gas chamber; argon sprayed out of a nozzle (10) below the outer ring gas chamber (7) forms an argon protection gas curtain (11) around the central injection pipe (3). The steel ladle collector nozzle has the advantages that in the pouring process, air around the steel ladle collector nozzle can be isolated, external air is prevented from entering molten steel, and secondary oxidation of the molten steel is avoided.

Description

Technical Field

[0001] The utility model relates to an argon gas protection device for a water outlet of a ladle for pouring steel ingots, belonging to the technical field of die casting production in the metallurgical industry. Background Art

[0002] The pouring of steel ingots is carried out through the center pouring pipe, which is a cast iron pipe lined with hollow refractory bricks used to collect the molten steel from the ladle outlet during pouring. The upper part is a funnel brick. The height of the center pouring pipe is 200-300mm higher than the ingot mold, and the inner diameter is 150-200mm. During the pouring process, if the seal between the ladle outlet and the center pouring pipe is not tight, air will enter the molten steel, causing secondary oxidation of the molten steel and affecting the quality of the ingot. Utility Model Content

[0003] The utility model aims to provide an argon protection device for the water inlet of a ladle for pouring steel ingots, which can isolate the air around the water inlet of the ladle during the pouring process, prevent external air from entering the molten steel and causing secondary oxidation of the molten steel, thereby solving the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] An argon gas protection device for a ladle outlet for pouring steel ingots comprises a ladle outlet, a sealing cover and a center pouring pipe. The sealing cover is arranged between the ladle outlet and the center pouring pipe. A center hole matching the ladle outlet is provided at the center of the sealing cover. Two circles of air chambers are provided around the center hole. The two circles of air chambers are connected by a connecting channel. One circle of air chambers is connected to an argon gas pipeline, and a nozzle is provided below the other circle of air chambers.

[0006] The two air chambers surrounding the central hole of the sealing cover are an inner air chamber and an outer air chamber respectively. The inner air chamber and the outer air chamber are connected through a connecting channel. The inner air chamber is connected to an argon gas pipeline. A nozzle is provided below the outer air chamber.

[0007] The nozzle below the outer ring air chamber faces the center injection pipe.

[0008] The argon gas ejected from the nozzle below the outer ring air chamber forms an argon gas protection air curtain around the middle injection pipe.

[0009] The sealing cover is a circular structure, the outer diameter of which matches the center injection pipe, and the inner diameter of which matches the ladle outlet.

[0010] The beneficial effect of the utility model is that during the pouring process, the argon protective gas is evenly and completely covered around the water inlet through the two air chambers of the sealing cover, which plays a role in isolating the air, thereby preventing external air from entering the molten steel and causing secondary oxidation of the molten steel, thereby ensuring the quality of the ingot. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model;

[0012] Figure 2 This is the front view of the sealing cover of the utility model;

[0013] Figure 3 This is a top view of the sealing cover of the utility model;

[0014] In the figure: ladle outlet 1, sealing cover 2, center injection pipe 3, funnel 4, center hole 5, inner circle air chamber 6, outer circle air chamber 7, connecting channel 8, argon gas pipeline 9, nozzle 10, argon gas protection air curtain 11. DETAILED DESCRIPTION

[0015] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0016] See attached Figure 1-3 , an argon protection device for a ladle outlet for pouring steel ingots, comprising a ladle outlet 1, a sealing cover 2 and a center injection pipe 3, the sealing cover 2 is arranged between the ladle outlet 1 and the center injection pipe 3, the sealing cover 2 is provided with a center hole 5 matching the ladle outlet 1 at the center, the sealing cover 2 is provided with two circles of air chambers around the center hole 5, the two circles of air chambers are connected by a connecting channel 8, one circle of air chambers is connected to an argon gas pipeline 9, and a nozzle 10 is provided below the other circle of air chambers.

[0017] In this embodiment, refer to the attached Figure 1-3 The ladle outlet 1 and the center pouring pipe 3 are commonly used components for pouring steel ingots, and the central upper part of the center pouring pipe 3 is a funnel brick 4.

[0018] The sealing cover 2 is a circular structure, and its outer diameter matches the center injection pipe 3. The sealing cover 2 has a center hole 5, and the size of the center hole 5 matches the ladle outlet 1. Two inner and outer air chambers are arranged around the center hole 5: an inner air chamber 6 and an outer air chamber 7. The inner air chamber 6 and the outer air chamber 7 are connected by a connecting channel 8. The inner air chamber 6 is connected to an argon gas pipeline 9. A nozzle 10 is provided under the outer air chamber 7, and the nozzle 10 faces the center injection pipe 3. The argon gas ejected from the nozzle 10 forms an argon protective gas curtain 11 around the center injection pipe 3.

[0019] During the pouring process, the argon protective gas is evenly and completely covered around the water inlet through the two air chambers of the sealing cover 2, and an argon protective gas curtain 11 is formed around the middle pouring pipe 3, which plays a role in isolating the air, thereby preventing external air from entering the molten steel and causing secondary oxidation of the molten steel, thereby ensuring the quality of the ingot.

Claims

1. An argon protection device for the water inlet of a ladle for pouring steel ingots, characterized in that: The invention comprises a ladle outlet (1), a sealing cover (2) and a center injection pipe (3), wherein the sealing cover (2) is arranged between the ladle outlet (1) and the center injection pipe (3), wherein a center hole (5) matching with the ladle outlet (1) is arranged at the center of the sealing cover (2), and two circles of air chambers are arranged around the center hole (5), wherein the two circles of air chambers are connected via a connecting channel (8), wherein one circle of air chambers is connected to an argon gas pipeline (9), and a nozzle (10) is arranged below the other circle of air chambers.

2. The argon protection device for the lower water inlet of the ladle for pouring steel ingots according to claim 1 is characterized in that: The two air chambers surrounding the central hole (5) of the sealing cover (2) are an inner air chamber (6) and an outer air chamber (7). The inner air chamber (6) and the outer air chamber (7) are connected via a connecting passage (8). The inner air chamber (6) is connected to an argon gas pipeline (9). A nozzle (10) is provided below the outer air chamber (7).

3. The argon protection device for the water inlet of the ladle for pouring steel ingots according to claim 2 is characterized in that: The nozzle (10) below the outer ring air chamber (7) faces the center injection pipe (3).

4. The argon protection device for the lower water inlet of the ladle for pouring steel ingots according to claim 3 is characterized in that: Argon gas ejected from the nozzle (10) below the outer ring air chamber (7) forms an argon gas protection air curtain (11) around the middle injection pipe (3).

5. The argon protection device for the lower water inlet of the ladle for pouring steel ingots according to claim 1 is characterized in that: The sealing cover (2) is a circular structure, the outer diameter of which matches the center injection pipe (3), and the inner diameter of which matches the ladle outlet (1).

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