CN217412429U - Six-flow tundish capable of improving flow consistency of various flows - Google Patents

Abstract

The utility model relates to a six-flow tundish capable of improving the flow consistency of each flow, comprising a tundish body, a turbulence suppressor, a left retaining wall and a right retaining wall, wherein the left retaining wall and the right retaining wall are arranged in the middle in an inverted V shape. In the tundish body, the tundish body is divided into a flow injection area, a left pouring area and a right pouring area, and a turbulence suppressor is arranged in the flow injection area of the tundish body. The beneficial effects are as follows: the device of the utility model is simple in structure and easy to realize, can solve the problem that the molten steel stays in the six-stream tundish for too short, which is not conducive to the floating of inclusions and the inconsistency of the flow of each stream, optimizes the flow field of the tundish, and improves the casting billet. quality, reducing the chance of production accidents.

Description

A six-stream tundish that can improve the flow consistency of each stream

technical field

The utility model relates to the technical field of iron and steel metallurgy, in particular to a six-stream tundish which can improve the flow consistency of each stream.

Background technique

The continuous casting process is an important part of the steelmaking process. The qualified molten steel is poured from the ladle into the tundish, and then distributed to the mold to form a billet shell, which is finally solidified into a billet through subsequent cooling. According to the design of the continuous casting machine, a tundish is generally equipped with one or more molds, and the combination of several molds is called "several streams". For example, a tundish with six molds in the middle is called "six streams".

The tundish is a transition metallurgical reactor between the ladle and the mold, which plays the role of distributing molten steel, uniformizing the composition and temperature of molten steel, and removing non-metallic inclusions. The tundish is usually divided into the injection area and the pouring area by the retaining wall structure. The injection area, also known as the impact area, is the area where the molten steel flows into the ladle through the long nozzle. The molten steel flows from the immersion nozzle to the area where the mold is located through the tundish. The flow speed of the molten steel in this area is small and the flow is relatively gentle, which is conducive to the floating of the inclusions. On the one hand, the function of the retaining wall structure is to isolate the injection area and the pouring area, and reduce the disturbance of molten steel injection to the molten steel in the pouring area; on the other hand, the diversion hole structure on the retaining wall can effectively improve the molten steel flow field. and temperature field, promote the floating and removal of inclusions in molten steel, and improve the consistency of the flow of each stream.

In addition, the tundish injection area is usually equipped with a turbulence suppressor, which is a control device that can reduce the turbulent kinetic energy of the tundish injection area. Extending the residence time of molten steel in the tundish is conducive to the floating of inclusions. In addition, the turbulence suppressor can also reduce the scour of the ladle injection to the refractory lining of the tundish impact zone, and improve the service life of the tundish.

At present, during the continuous casting process of the existing six-flow tundish, the residence time of molten steel in the six-flow tundish is too short due to many factors such as the turbulence suppressor structure or the design of the guide hole structure of the retaining wall. Stream flows are less synchronized. The residence time of molten steel in the six-flow tundish is too short, which is not conducive to the floating of inclusions. In actual production, due to the inconsistency of the flow of each stream, the superheat degree of the molten steel that first passes through the tundish pouring hole is high, resulting in poor quality of the solidified slab, serious problems of porosity, shrinkage and segregation, and finally pouring through the tundish. The superheat degree of molten steel in the hole is low, which is easy to cause condensation in the pouring hole of the tundish, resulting in production accidents. Therefore, it is necessary to find a method to improve the flow consistency of each stream in the six-stream tundish.

Utility model content

In order to overcome the defects of the prior art, the technical problem solved by the present invention is to provide a six-stream tundish that can improve the flow consistency of each stream, which has a simple structure and is easy to implement, and can solve the problem that the residence time of molten steel in the six-stream tundish is too short. It is not conducive to the floating of inclusions and the inconsistency of the flow of each stream, optimizes the flow field of the tundish, improves the quality of the cast slab, and reduces the probability of production accidents.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A six-flow tundish capable of improving the flow consistency of each flow, comprising a tundish body, a turbulence suppressor, a left retaining wall and a right retaining wall, characterized in that the left retaining wall and the right retaining wall are of symmetrical structure and are in the form of a symmetrical structure. The inverted V shape is arranged in the tundish body, and the tundish body is divided into a flow injection area, a left pouring area, and a right pouring area; the turbulence suppressor is arranged in the flow injection area of the tundish body;

The turbulence suppressor is a basin-type structure, and a protruding structure is arranged at the upper end of the inner part, and the height is a quarter of the height of the tundish body;

The left retaining wall is provided with a guide hole 1, a guide hole 2 and a guide hole 3 which are inclined upward, wherein the horizontal distance between the upper end of the guide hole 1 and the right edge of the left retaining wall is a quarter of the height of the tundish body 1. The vertical distance from the lower edge of the left retaining wall is three-fifths of the height of the tundish body; the upper end of the guide hole 2 is the same height as the guide hole 1, and the horizontal distance between them is one-fifth of the height of the tundish body ; The vertical distance between the upper end of the third diversion hole and the upper end of the first diversion hole is one third of the height of the tundish body, and the horizontal distance is one tenth of the height of the tundish body;

The guide hole 1, the guide hole 2 and the guide hole 3 on the left retaining wall are arranged along the upward and rightward slopes perpendicular to the left retaining wall. The vertical direction of the left retaining wall is 70-80°; the diameters of the first, second and third guide holes are all one-tenth of the height of the tundish body;

The right baffle wall is provided with a guide hole 1, a guide hole 2 and a guide hole 3 which are obliquely upward in a one-to-one correspondence with the left baffle wall.

The left pouring area and the right pouring area of the tundish body are respectively provided with three pouring holes.

The left retaining wall and the right retaining wall are arranged behind the tundish body at the same height as the tundish body.

The centerline of the turbulence suppressor coincides with the centerline of the ladle outlet.

Compared with the prior art, the beneficial effects of the present utility model are:

1) By setting a basin turbulence suppressor at the bottom of the injection area, the molten steel from the long nozzle of the ladle is directly poured onto the turbulence suppressor. Due to the protruding structure of the upper end of the basin turbulence suppressor, the tundish injection flow is greatly reduced. The turbulent kinetic energy in the zone prolongs the residence time of molten steel in the tundish, avoids the short-circuit flow directly out of the diversion hole of the retaining wall, and increases the mixing degree of molten steel;

2) By setting retaining walls with oblique upward diversion holes in the injection area and pouring area, the molten steel from the injection area is easier to flow to the top of the tundish, which increases the residence time of the molten steel in the tundish and avoids Short-circuit flow, and will not scour the refractory materials on both sides of the tundish body, the molten steel stream is redistributed to each pouring hole of the tundish, increasing the synchronism of the flow of each flow, that is, the above setting increases the fluidity of each flow in the six-flow tundish. Consistency, optimized tundish flow field;

3) The structure is simple and easy to implement, and the turbulence suppressor and the retaining wall are easy to process without increasing the cost.

Description of drawings

Fig. 1 is the structural principle schematic diagram of the present utility model;

Fig. 2 is the structural principle schematic diagram of the turbulence suppressor of the present utility model;

Fig. 3 is the structural principle schematic diagram of the right retaining wall of the present utility model;

FIG. 4 is a schematic diagram of the structural principle of the right and left retaining walls of the present invention.

In the figure: 1- Tundish body 2- Turbulence suppressor 3- Left retaining wall 4- Right retaining wall 5- Pouring hole 11/14- Diversion hole 1 12/15- Diversion hole 2 13/16- Diversion hole three

Detailed ways

The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings:

As shown in FIGS. 1-4 , a six-stream tundish that can improve the flow consistency of each stream involved in the present invention includes a tundish body 1, a turbulence suppressor 2, a left retaining wall 3 and a right retaining wall 4, The left retaining wall 3 and the right retaining wall 4 are symmetrical structures, and are arranged in the tundish body 1 in an inverted V shape, dividing the tundish body 1 into a flow injection area, a left pouring area, and a right pouring area; the turbulence suppression The device 2 is arranged in the injection area of the tundish body 1;

The turbulence suppressor 2 is a basin-type structure with a protruding structure at the upper end of the interior, and the height is a quarter of the height of the tundish body 1;

The left retaining wall 3 is provided with a guide hole 1 11, a guide hole 2 12 and a guide hole 3 13 that are inclined upward, wherein the horizontal distance between the upper end of the guide hole 1 11 and the right edge of the left retaining wall 3 is the tundish. A quarter of the height of the main body 1, and the vertical distance from the lower edge of the left retaining wall 3 is three-fifths of the height of the tundish body 1; The distance is one-fifth of the height of the tundish body 1; the vertical distance between the upper end of the guide hole 3 13 and the upper end of the guide hole 1 11 is one-third of the height of the tundish body 1, and the horizontal distance is the height of the tundish body 1. one tenth;

The guide hole 1 11 , the guide hole 2 12 and the guide hole 3 13 on the left retaining wall 3 are arranged along the vertical direction of the left retaining wall 3 and are inclined upward and rightward, and the center line thereof is in the horizontal direction of the left retaining wall 3 . 50 to 70°, and 70 to 80° to the vertical direction of the left retaining wall 3; the diameters of the first guide hole 11, the second guide hole 12 and the third guide hole 13 are all tenths of the height of the tundish body 1 one;

The right retaining wall 4 is provided with a first guide hole 14 , a second guide hole 15 and a third guide hole 16 corresponding to the left baffle wall 3 .

The left pouring area and the right pouring area of the tundish body 1 are respectively provided with three pouring holes 5 .

The left retaining wall 3 and the right retaining wall 4 are arranged after the tundish body 1 and are at the same height as the tundish body 1, and are generally high.

The turbulence suppressor 2 is arranged at the position of the tundish body 1, and it should be ensured that the centerline of the turbulence suppressor 2 coincides with the centerline of the ladle outlet.

During operation, the molten steel from the ladle outlet is directly poured into the turbulence suppressor 2. The protruding structure on the upper part of the basin turbulence suppressor 2 greatly reduces the turbulent kinetic energy in the injection area of the tundish body 1, and prolongs the flow of molten steel in the tundish body. The residence time of 1 avoids the short-circuit flow of molten steel directly coming out of the diversion holes on the left retaining wall 3 and the right retaining wall 4, and increases the mixing degree of molten steel;

The molten steel from the guide hole 1 11, the guide hole 2 12 and the guide hole 3 13 of the left retaining wall 3 enters the left pouring area. The guide hole 1 11, the guide hole 2 12 and the guide hole 3 13 have inclined The upward angle can make the molten steel stream have a guiding effect, and then evenly distribute it to the three pouring holes 5 in the left pouring area of the tundish body 1, which increases the mixing degree and average residence time of the molten steel, and increases the synchronization of the flow of each stream. sex;

In the same way, the molten steel from the guide hole 1 14, the guide hole 2 15 and the guide hole 3 16 of the right retaining wall 4 enters the right pouring area, the guide hole 1 14, the guide hole 2 15 and the guide hole 3. 16 has an oblique upward angle, which can make the molten steel stream have a guiding effect, and then evenly distribute it to the three pouring holes 5 in the right pouring area of the tundish body 1, which increases the mixing degree of molten steel and the average residence time. synchronicity of flow;

The combined form of the turbulence suppressor 2, the left retaining wall 3 and the right retaining wall 4 improves the flow field of the six-flow tundish and improves the flow consistency of each flow.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (3)

1. A six-flow tundish capable of improving the flow consistency of each flow comprises a tundish body, a turbulence suppressor, a left retaining wall and a right retaining wall, and is characterized in that the left retaining wall and the right retaining wall are of symmetrical structures and are arranged in the tundish body in an inverted V shape to divide the tundish body into a flow injection area, a left pouring area and a right pouring area; the turbulence suppressor is arranged in the injection area of the tundish body;

the turbulence suppressor is of a basin-shaped structure, a protruding structure is arranged at the upper end of the interior of the turbulence suppressor, and the height of the turbulence suppressor is one fourth of that of the tundish body;

the left retaining wall is provided with a first obliquely upward flow guide hole, a second obliquely upward flow guide hole and a third obliquely upward flow guide hole, wherein the horizontal distance between the upper end of the first flow guide hole and the right edge of the left retaining wall is one fourth of the height of the tundish body, and the vertical distance between the upper end of the first flow guide hole and the lower edge of the left retaining wall is three fifths of the height of the tundish body; the upper ends of the second diversion holes are consistent with the first diversion holes in height, and the horizontal distance between the upper ends of the second diversion holes and the first diversion holes is one fifth of the height of the tundish body; the vertical distance between the upper end of the third diversion hole and the upper end of the first diversion hole is one third of the height of the tundish body, and the horizontal distance is one tenth of the height of the tundish body;

the first diversion hole, the second diversion hole and the third diversion hole on the left retaining wall are arranged upwards and rightwards in an inclined manner along a direction perpendicular to the left retaining wall, and the central line of the diversion holes forms 50-70 degrees with the horizontal direction of the left retaining wall and 70-80 degrees with the vertical direction of the left retaining wall; the diameters of the first diversion hole, the second diversion hole and the third diversion hole are one tenth of the height of the tundish body;

and a first oblique upward diversion hole, a second diversion hole and a third diversion hole which are in one-to-one correspondence with the left retaining wall are formed in the right retaining wall.

2. The six-flow tundish capable of improving the flow uniformity of each flow according to claim 1, wherein three pouring holes are uniformly distributed in the left pouring area and the right pouring area of the tundish body.

3. The six-stream tundish according to claim 1, wherein the left and right retaining walls are disposed behind the tundish body and are flush with the tundish body.

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