Anti-erosion tundish upper nozzle

Abstract

The utility model discloses an anti-erosion tundish upper nozzle, which comprises a nozzle body (1) and a bowl part (2), and is characterized in that the nozzle body (1) comprises a body inner layer (11) and a body outer layer (12), the body inner layer (11) and the bowl part (2) are made of the same magnesia carbon material and are integrally formed, and the body outer layer (12) is made of the same magnesia carbon material. And the body outer layer (12) is made of an aluminum-carbon material. According to the anti-erosion tundish upper nozzle, the nozzle body is divided into the body inner layer and the body outer layer, and the body inner layer and the bowl part are integrally formed by adopting the magnesia carbon material, so that erosion of calcium-containing steel can be prevented, and the service life of the tundish upper nozzle is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel continuous casting technical field, concretely is a kind of anti-erosion tundish upper nozzle. BACKGROUND

[0002] Tundish upper nozzle is important component in continuous casting steel production process, it is installed at tundish bottom.Tundish upper nozzle main body structure includes nozzle body and bowl part, bowl part is matched with tundish integral stopper, the flow of molten steel is controlled by the up-down movement of stopper;The bottom of nozzle body is connected with submerged nozzle.Through the control of stopper, molten steel flows from tundish, in turn, through tundish upper nozzle, submerged nozzle reaches crystallizer.

[0003] The material of nozzle body is aluminum-carbon material composed of alumina and graphite, compared with magnesium-carbon material and zirconium-carbon material, aluminum-carbon material has low cost and high strength;The material of bowl part is magnesium-carbon material composed of magnesite and graphite, magnesite is used in bowl part to prevent the erosion of calcium-containing steel, and free calcium in molten steel can quickly erode alumina material.But in actual use, it is found that the inner wall of nozzle body is eroded seriously, which affects the service life of the whole tundish upper nozzle. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the problems existing in prior art, and provides a kind of anti-erosion tundish upper nozzle.

[0005] The utility model aims at the problems existing in prior art, and provides a kind of anti-erosion tundish upper nozzle.

[0006] A kind of anti-erosion tundish upper nozzle, including nozzle body and bowl part, it is characterized in that: the nozzle body includes body inner layer and body outer layer, the body inner layer and bowl part are made of same magnesium-carbon material and the body inner layer and bowl part are integrally formed, and the body outer layer is made of aluminum-carbon material.

[0007] The thickness of the body inner layer is not more than 1 / 3 of the thickness of the body outer layer.

[0008] The body inner layer and bowl part and the body outer layer are pressed into shape using an isostatic press.

[0009] The nozzle body further includes a body interface layer, which is located between the body inner layer and the body outer layer.

[0010] The body interface layer is made of aluminum-magnesium-carbon material.

[0011] The thickness of the body interface layer is 1 / 2 to 5 / 6 of the thickness of the body inner layer.

[0012] The body inner layer and bowl part and the body interface layer and body outer layer are pressed into shape using an isostatic press.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The erosion-resistant tundish upper nozzle has the body inner layer and the bowl part integrally formed by using the magnesium-carbon material, can prevent the erosion of the calcium-containing steel, and improves the service life of the tundish upper nozzle.

[0015] The erosion-resistant tundish upper nozzle further sets the body connecting layer in the inside of the nozzle body, avoids the crack at the joint part of the body inner layer of the magnesium-carbon material and the body outer layer of the aluminum-carbon material due to the large difference in the thermal expansion coefficient, and further improves the reliability and the service life of the tundish upper nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0016] ATTACHED Figure 1 The utility model provides an erosion-resistant tundish upper nozzle structure schematic view.

[0017] Among them: 1 - nozzle body;11 - body inner layer;12 - body outer layer;13 - body connecting layer;2 - bowl part. DETAILED DESCRIPTION

[0018] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth in this disclosure; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus a detailed description of them will not be repeated.

[0019] The terms "one", "a", "the", "said", and "s" are used to indicate the presence of one or more elements / components / etc.; the terms "include" and "have" are used to indicate an open-ended inclusion and refer to the presence of additional elements / components / etc. in addition to the listed elements / components / etc.

[0020] As Figure 1 shown: an erosion-resistant tundish upper nozzle, including nozzle body 1 and bowl part 2, the nozzle body 1 includes body inner layer 11 and body outer layer 12, the body inner layer 11 and bowl part 2 are made of magnesium-carbon material of the same material and the body inner layer 11 and bowl part 2 are integrally formed, the body outer layer 12 is made of aluminum-carbon material, the body inner layer 11 and bowl part 2, and the body outer layer 12 are press-formed by an isostatic press; the tundish upper nozzle can prevent the erosion of the calcium-containing steel, and improves the service life.

[0021] To ensure the overall strength and economy of the tundish inlet for corrosion prevention, the thickness of the inner layer 11 of the main body shall not exceed 1 / 3 of the thickness of the outer layer 12 of the main body.

[0022] Because the thermal expansion coefficients of the inner layer 11 of the magnesium carbon material body and the outer layer 12 of the aluminum carbon material body are significantly different, in order to prevent cracks from forming at the joint between the inner layer 11 of the magnesium carbon material body and the outer layer 12 of the aluminum carbon material body due to the large difference in thermal expansion coefficients, the gate body 1 also includes a body connecting layer 13 made of aluminum magnesium carbon material. The body connecting layer 13 is located between the inner layer 11 and the outer layer 12 of the body, and the thickness of the body connecting layer 13 is 1 / 2 to 5 / 6 of the thickness of the inner layer 11 of the body. The aforementioned inner layer 11 of the body, the bowl 2, the body connecting layer 13, and the outer layer 12 of the body are formed by isostatic pressing. Example

[0023] like Figure 1 The diagram shows an anti-corrosion tundish top nozzle, comprising a nozzle body 1 and a bowl portion 2. The nozzle body 1 includes an inner layer 11, an outer layer 12, and a body connecting layer 13 located between the inner and outer layers 11 and 12. The inner layer 11 and the bowl portion 2 are made of the same magnesium-carbon material and are integrally formed. The outer layer 12 is made of aluminum-carbon material, and the body connecting layer 13 is made of aluminum-magnesium-carbon material. The thickness of the inner layer 11 is 1 / 3 of the thickness of the outer layer 12, and the thickness of the body connecting layer 13 is 2 / 3 of the thickness of the inner layer 11. The aforementioned inner layer 11, bowl portion 2, body connecting layer 13, and outer layer 12 are formed using an isostatic press.

[0024] The anti-corrosion tundish top nozzle provided in this embodiment decomposes the nozzle body 1 into an inner layer 11 and an outer layer 12, and the inner layer 11 and the bowl 2 are integrally formed from magnesium carbon material, which can prevent corrosion of calcium-containing steel grades and improve the service life of the tundish top nozzle. The anti-corrosion tundish top nozzle further improves the reliability and service life of the tundish top nozzle by setting a body connecting layer 13 inside the nozzle body 1, which avoids cracks at the joint between the magnesium carbon material inner layer 11 and the aluminum carbon material outer layer 12 due to the large difference in the coefficient of thermal expansion.

[0025] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0026] In the description of the embodiments of the utility model, it is understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model.

[0027] In the description of the present specification, the description of the terms "one embodiment", "one preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The above embodiments only illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model, any modification made on the basis of the technical scheme according to the technical idea of the utility model falls within the protection scope of the utility model; the technologies not involved in the utility model can be realized by the prior art.

Claims

1. An erosion-resistant tundish nozzle comprising a nozzle body (1) and a bowl (2), characterized in that: The water gap body (1) comprises a body inner layer (11) and a body outer layer (12), the body inner layer (11) and the bowl part (2) are made of magnesium carbonaceous material of the same material, and the body inner layer (11) and the bowl part (2) are integrally formed, and the body outer layer (12) is made of aluminum carbonaceous material.

2. The erosion resistant tundish lip according to claim 1, wherein: The thickness of the body inner layer (11) is not more than 1 / 3 of the thickness of the body outer layer (12).

3. The erosion resistant tundish lip of claim 1, wherein: The body inner layer (11), the bowl part (2) and the body outer layer (12) are formed by isostatic pressing.

4. The erosion resistant shroud according to any one of claims 1 to 3, wherein: The water gap body (1) further comprises a body connecting layer (13), and the body connecting layer (13) is located between the body inner layer (11) and the body outer layer (12).

5. The erosion resistant tundish lip of claim 4, wherein: The body connecting layer (13) is made of aluminum magnesium carbonaceous material.

6. The erosion resistant tundish lip of claim 4, wherein: The thickness of the body connecting layer (13) is 1 / 2-5 / 6 of the thickness of the body inner layer (11).

7. The erosion resistant tundish lip of claim 4, wherein: The body inner layer (11), the bowl part (2), the body connecting layer (13) and the body outer layer (12) are formed by isostatic pressing.

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