CN214349567U

CN214349567U - Tundish with long service life

Info

Publication number: CN214349567U
Application number: CN202022742219.2U
Authority: CN
Inventors: 孙文新; 张舰; 鲁志燕; 康冬冬; 许斌
Original assignee: Prco Kisc Yunnan Refractories Co ltd
Current assignee: Prco Kisc Yunnan Refractories Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-10-08
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a long-life tundish, its characterized in that: the device comprises a permanent layer, an intermediate layer, a working layer, a covered lug, a groove, an impact groove and long water gaps, wherein the intermediate layer, the working layer and the impact groove are arranged in the permanent layer, and a plurality of long water gaps are arranged at the bottom of the working layer; the utility model has the advantages that the thickness of the part is increased by arranging the ladle opening lug, thereby preventing the slag line from penetrating through to cause safety accidents, and simultaneously fastening the ladle opening to prevent the ladle opening from loosening; the impact groove is arranged in an impact area of the steel flow, and the thickness of the area is directly increased under the condition that the thickness of a working area at other positions is not changed, so that the service life of the whole tundish is ensured to be consistent; meanwhile, the molten steel flows through the impact groove, the flowing distance of the molten steel in the tundish is prolonged, and inclusions and floating objects are captured.

Description

Tundish with long service life

Technical Field

The utility model relates to a package field in the middle of the steelmaking continuous casting especially relates to a long-life tundish.

Background

The tundish is a refractory container used in the steel-making process, receives the impact of molten steel cast from a ladle in the continuous casting process, and then is distributed into each crystallizer through a tundish nozzle. Because the working layer is in contact with molten steel for a long time, the working lining material is usually made of spray coating or dry material, and the tundish with long service life is basically formed by dry material vibration baking.

However, due to the flow field effect of the steel flow in the tundish, the erosion and scouring strength of the steel flow on the working layers at various positions in the tundish can be correspondingly different. The working layer is damaged quickly in use at certain positions, particularly the positions around the steel stream impact points due to the strong scouring action of the steel streams, and if the working layer at the positions is corroded completely, the whole tundish is stopped to be used. Therefore, the requirement of a steel mill on the long service life of the tundish cannot be met, and the product is greatly wasted in the process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a long-life tundish, which is not enough for the prior art.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A long-life tundish is characterized in that: the novel gate comprises a permanent layer, an intermediate layer, a working layer, a covering lug, a groove, an impact groove and a long nozzle, wherein the intermediate layer, the working layer and the impact groove are arranged in the permanent layer, the covering lug is arranged on the intermediate layer, and the groove and the long nozzles are arranged on the working layer.

Furthermore, the upper part of the middle layer is provided with a bag opening convex block, the bag opening convex block is convex towards the contact direction with the working layer, and the working layer is provided with a groove matched with the bag opening convex block.

Further, a working layer is arranged in the middle layer and is formed by building a plurality of slag bricks, so that the working layer forms a groove with a wide upper part and a narrow lower part; the inside of working layer is provided with strikes the groove, strike the groove and form by the steel sheet combination concatenation.

Furthermore, 3-5 long water gaps are transversely and uniformly arranged at the bottom of the working layer and penetrate through the working layer, the middle layer and the permanent layer.

Furthermore, the long nozzle is sequentially composed of a contraction part at the upper part, a middle part and an outlet part at the bottom, the contraction part is sequentially and correspondingly composed of a working layer, a middle layer and a permanent layer, the bottom of the contraction part is an inward contracted arc transition section, the bottom of the contraction part is connected with the upper end of the middle part, the bottom of the middle part is an outward expanded arc transition section, the bottom of the middle part is connected with the upper end of the outlet part, and the middle part and the outlet part are only composed of the middle layer.

Further, the inner diameter of the contraction part is 80mm, the inner diameter of the middle part is 65mm, and the inner diameter of the outlet part is 75 mm.

Furthermore, the included angle between the side wall and the bottom surface of the working layer is greater than 94 degrees and less than 103 degrees, and the slag brick of the working layer is made of magnesia carbon materials or alumina-magnesia carbon materials.

Further, the middle layer is a steel plate with the thickness not less than 20 mm.

Furthermore, the thickness of the bag mouth lug is 8-12mm, and the material is Q195 or Q235.

The utility model has the advantages that the thickness of the part is increased by arranging the ladle opening lug, thereby preventing the slag line from penetrating through to cause safety accidents, and simultaneously fastening the ladle opening to prevent the ladle opening from loosening; the impact groove is arranged in an impact area of the steel flow, and the thickness of the area is directly increased under the condition that the thickness of a working area at other positions is not changed, so that the service life of the whole tundish is ensured to be consistent; meanwhile, the molten steel flows through the impact groove, the flowing distance of the molten steel in the tundish is prolonged, and inclusions and floating objects are captured.

Drawings

Fig. 1 is a schematic top view of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the structure A-A' of the present invention;

fig. 3 is a schematic structural view of the long nozzle of the present invention;

in the figure: 1. a permanent layer; 2. a working layer; 3. an intermediate layer; 4. a bag mouth lug; 5. a groove; 6. an impact groove; 7. a long nozzle; a. a constriction; b. a middle part; c. and an outlet part.

Detailed Description

The present invention is further illustrated by the following examples, but is not limited to the contents of the specification.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in the figure: a long-life tundish comprises a permanent layer 1, an intermediate layer 3, a working layer 2, a ladle opening lug 4, a groove 5, an impact groove 6 and a long nozzle 7.

The permanent layer 1 is internally provided with an intermediate layer 3, a working layer 2 and an impact groove 6, the upper part of the intermediate layer 3 is provided with a ladle opening convex block 4, the ladle opening convex block 4 is convex towards the contact direction with the working layer 2, the working layer 2 is provided with a groove 5 matched with the ladle opening convex block 4, the ladle opening convex block 4 is arranged at the slag line position at the upper part of the intermediate layer 3, the part is thickened, the slag line is prevented from penetrating to cause safety accidents, and meanwhile, the function of fastening a ladle opening is achieved, and the ladle opening is prevented from loosening; the tundish is characterized in that a working layer 2 is arranged in the middle layer 3, the working layer 2 is formed by building a plurality of slag bricks, so that a groove with a wide upper part and a narrow lower part is formed in the working layer 2, an impact groove 6 is arranged in the working layer 2, the impact groove 6 is arranged in a steel flow impact area, the impact groove 6 is formed by combining and splicing steel plates, under the condition that the thickness of the working area at other positions is not changed, the thickness of the area is directly increased, and the service life of the whole tundish is ensured to be consistent; molten steel flows through the impact groove, a certain distance is reserved between the molten steel and the bottom of the tundish after the molten steel flows through the impact groove 6, the flowing distance of the molten steel in the tundish is prolonged, and inclusions and floating objects are captured favorably.

The bottom of the working layer 2 is transversely and uniformly provided with 3-5 long nozzles 7, the long nozzles 7 penetrate through the working layer 2, the intermediate layer 3 and the permanent layer 1, each long nozzle 7 sequentially comprises a contraction part a at the upper part, a middle part b and an outlet part c at the bottom, each contraction part a is formed by sequentially and correspondingly forming the working layer 2, the intermediate layer 3 and the permanent layer 1, the bottom of each contraction part a is an inward contraction arc transition section, the bottom of each contraction part a is connected with the upper end of the middle part b, the bottom of the middle part b is an outward expansion arc transition section, the bottom of the middle part b is connected with the upper end of the outlet part c, the middle part b and the outlet part c are only formed by the intermediate layer 3, the inner diameter of each contraction part a is 80mm, the inner diameter of the middle part b is 65mm, and the inner diameter of the outlet part c is 75 mm.

The included angle between the side wall and the bottom surface of the working layer 2 is A which is larger than 94 degrees and smaller than 103 degrees.

The intermediate layer 3 is a steel plate with a thickness of not less than 20 mm.

The thickness of the mouth covering lug 4 is 8-12mm, and the material is Q195 or Q235.

The slag brick of the working layer 2 is made of magnesia carbon materials or alumina-magnesia carbon materials.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. A long-life tundish is characterized in that: the novel plastic sealing device comprises a permanent layer (1), an intermediate layer (3), a working layer (2), a mouth covering lug (4), a groove (5), an impact groove (6) and a long water gap (7), wherein the intermediate layer (3), the working layer (2) and the impact groove (6) are arranged in the permanent layer (1), the mouth covering lug (4) is arranged on the intermediate layer (3), and the groove (5) and the long water gaps (7) are arranged on the working layer (2).

2. A long life tundish according to claim 1, wherein: the upper portion of the middle layer (3) is provided with a covering lug (4), the covering lug (4) is convex in the direction of contacting with the working layer (2), and a groove (5) matched with the covering lug (4) is formed in the working layer (2).

3. A long life tundish according to claim 2, wherein: a working layer (2) is arranged in the middle layer (3), and the working layer (2) is built by a plurality of slag bricks, so that the working layer (2) forms a groove with a wide upper part and a narrow lower part; the inside of working layer (2) is provided with strikes groove (6), strike groove (6) and form by the steel sheet combination concatenation.

4. A long life tundish according to claim 3, wherein: 3-5 long water gaps (7) are transversely and uniformly arranged at the bottom of the working layer (2), and the long water gaps (7) penetrate through the working layer (2), the middle layer (3) and the permanent layer (1).

5. A long life tundish according to claim 4, wherein: the long nozzle (7) is composed of a contraction part (a) at the upper part, a middle part (b) and an outlet part (c) at the bottom in sequence, the contraction part (a) is composed of a working layer (2), an intermediate layer (3) and a permanent layer (1) which correspond to each other in sequence, the bottom of the contraction part (a) is an arc transition section which contracts inwards, the bottom of the contraction part (a) is connected with the upper end of the middle part (b), the bottom of the middle part (b) is an arc transition section which expands outwards, the bottom of the middle part (b) is connected with the upper end of the outlet part (c), and the middle part (b) and the outlet part (c) are only composed of the intermediate layer (3).

6. A long life tundish according to claim 5, wherein: the inner diameter of the contraction part (a) is 80mm, the inner diameter of the middle part (b) is 65mm, and the inner diameter of the outlet part (c) is 75 mm.

7. A long life tundish according to claim 3, wherein: the included angle between the side wall and the bottom surface of the working layer (2) is (A) more than 94 degrees and less than 103 degrees, and the slag brick of the working layer (2) is made of magnesia carbon materials or alumina-magnesia carbon materials.

8. A long life tundish according to claim 2 or claim 3, wherein: the middle layer (3) is a steel plate with the thickness not less than 20 mm.

9. A long life tundish according to claim 2, wherein: the thickness of the mouth wrapping convex block (4) is 8-12mm, and the material is Q195 or Q235.