CN213559782U - Novel special-shaped blank crystallizer - Google Patents

Abstract

The utility model provides a novel beam blank crystallizer belongs to the crystallizer field for steelmaking continuous casting to it is difficult to realize the very big problem of the full protection casting and the full protection casting technology implementation degree of difficulty to solve medium and small section beam blank. The cavity structure comprises a copper plate or a copper pipe which is composed of an inner arc plate, an outer arc plate, a left side plate and a right side plate in four directions, wherein an upper opening section and a lower opening section of the cavity structure are H-shaped, the upper opening section is provided with an arc concave part at a web of the inner arc plate and the outer arc plate, the arc concave part extends to the inside of the cavity structure for a section and then is terminated to form an opening arc, the opening arc length, the opening arc width and the opening arc depth form a flat funnel type cavity, and the central part of the flat funnel type cavity is the position of a molten steel casting point.

Description

Novel special-shaped blank crystallizer

Technical Field

The utility model relates to a steelmaking is crystallizer technical field for continuous casting, especially relates to a novel beam blank crystallizer.

Background

The crystallizer is the core equipment for continuous steel-making casting. When steel is continuously cast, high-temperature molten steel is injected into the crystallizer from the tundish, the crystallizer rapidly takes away heat through a water cooling channel of the crystallizer, a blank shell with certain thickness is formed on the periphery of the wall of the crystallizer by the molten steel, the blank shell with certain liquid core length is pulled out of the crystallizer through a withdrawal and straightening unit, and the casting blank is further cooled and solidified in a secondary cooling area after being taken out of the crystallizer. Molten steel is poured into the crystallizer from the tundish, and according to the quality requirement of the produced steel grade, partial steel grade with high quality grade and special purpose needs to adopt the submerged nozzle to protect the molten steel in the section, so that the molten steel is prevented from contacting with air to generate secondary oxidation, and the quality of the steel is prevented from being influenced.

A beam blank continuous casting machine for rolling a blank for H-section steel, which is also called a near-net-shape continuous casting machine, has a casting blank shape similar to that of an H-shape, and the cross-sectional dimension of the casting machine is generally expressed as flange length x flange width x web thickness. The size difference of the large, medium and small sections of the crystallizer of the beam blank continuous casting machine is large, and the section size can be described as 280-1050 multiplied by 200-500 multiplied by 50-120 mm. For the crystallizer of the special-shaped blank continuous casting machine with larger section size, because the section size is larger and the web plate is relatively thicker, the crystallizer can be cast in the modes of two-point protection, thin-wall submerged nozzles at the center of the web plate and the like, thereby meeting the requirement of the full-protection casting of molten steel. Under special conditions, single-side single-point casting can be adopted, but the production control difficulty is high, the requirements on the distribution of the flow field in the crystallizer and the cooling of the casting blank are high, and the control of the product quality is not facilitated. For medium and small section beam blanks with flange length not more than 430mm and web thickness not more than 85mm, the casting distance is insufficient and full-protection casting is difficult due to small casting point distance during double-point casting, the web thickness is thin, and when a thin-wall submerged nozzle is adopted at the web, the nozzle is easy to adhere to the wall of a crystallizer, so that the implementation difficulty of the full-protection casting process is extremely high.

Disclosure of Invention

In order to solve the technical problems that the middle and small section special-shaped blank is difficult to realize the full-protection casting and the implementation difficulty of the full-protection casting process is very large, the utility model provides a novel special-shaped blank crystallizer.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a novel beam blank crystallizer, it includes the cavity structure of being constituteed by the copper or the copper pipe of these four directions of inner arc board, outer arc board, left side board and right side board, the section of the suitable for reading and the section of suitable for reading of cavity structure are H shape, the section of the suitable for reading has the circular arc concave rising in the web department of inner arc board and outer arc board, the radian that the circular arc concave rising terminates and forms the opening radian after to inside one section of extending of cavity structure, opening radian length, opening radian width and opening radian degree of depth form funnel type cavity, the central point of flat funnel type cavity is the molten steel casting point position.

Optionally, the inner arc plate, the outer arc plate, the left side plate and the right side plate all have inverted tapers.

Optionally, the width of the opening radian is 90-200 mm; the radian depth of the opening is 500-850 mm.

The utility model has the advantages that:

by arranging the arc concave-convex part and the opening radian, the structure of the crystallizer is changed, the flow field distribution of molten steel in the crystallizer is improved, and the molten steel of the crystallizer flows more uniformly, so that the production difficulty of single-point protection casting of the special-shaped blank with large section size can be reduced, the technical problem of full-protection casting of the special-shaped blank with medium and small section sizes is solved, and the quality of the continuous casting blank can be greatly improved.

Drawings

Fig. 1 is a schematic structural shape diagram of the special-shaped blank crystallizer of the present invention.

Fig. 2 shows the sectional shape of the upper opening of the special-shaped blank crystallizer and the position of the casting point.

Fig. 3 is the sectional shape of the lower opening of the special-shaped blank crystallizer of the utility model.

Fig. 4 is a schematic drawing of steel pouring of the special-shaped blank crystallizer of the utility model.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 4, the novel parison mold according to this embodiment includes a cavity structure composed of four copper plates or copper tubes, i.e., an inner arc plate 76, an outer arc plate 75, a left side plate 73, and a right side plate 74, an upper opening section 71 and a lower opening section 72 of the cavity structure are H-shaped, the upper opening section 71 has an arc concave at a web of the inner arc plate 76 and the outer arc plate 75, an arc of the arc concave extends into the cavity structure for a certain length and then terminates to form an opening arc, an opening arc length 5, an opening arc width 4, and an opening arc depth 6 form a flat funnel-shaped cavity, and a central portion of the flat funnel-shaped cavity is a molten steel casting point position 91.

The dimensions of the upper mouth section 71 and the lower mouth section 72 can be expressed as flange length 1 x flange width 2 x web thickness 3.

The opening radian length 5, the opening radian width 4 and the opening radian depth 6 form a flat funnel type cavity, the flowing state of molten steel after being injected into a crystallizer is improved, the flow field distribution is more uniform, and the smooth radian curve reduces the stress concentration of a casting blank shell in the continuous casting steel casting process.

Optionally, the inner arc plate 76, the outer arc plate 75, the left side plate 73 and the right side plate 74 are all provided with reverse taper.

Optionally, the opening arc length 5 is related to the length of the crystallizer web and can extend to the flange position; the opening radian width 4 is 90-200 mm; the opening radian depth 6 is 500-850 mm.

The copper pipe is an integral pipe type copper pipe, and the inner arc plate 76, the outer arc plate 75, the left side plate 73 and the right side plate 74 can also be formed by other cooling parts in different forms.

The utility model discloses the space of well newly-increased flat funnel type cavity is great, and thin wall immersion nozzle can be very easy place, no longer receives the little influence of beam blank cross sectional dimension, makes the full protection water steel realization degree of difficulty greatly reduced, and the interior molten steel flow field distribution of crystallizer when also having improved large cross sectional dimension beam blank single-point casting simultaneously, molten steel flow more evenly, the casting blank quality is better.

When steel is required to be poured, the thin-wall submerged nozzle 12 is placed between the tundish 11 and the novel special-shaped blank crystallizer 15, the center of the thin-wall submerged nozzle 12 is aligned with the position 91 of a molten steel pouring point, molten steel flowing out of the tundish 11 enters the novel special-shaped blank crystallizer 15 (a thick black line frame in fig. 4) through the thin-wall submerged nozzle 12, the thin-wall submerged nozzle 12 is inserted into the position below the molten steel level 13 of the crystallizer by a certain depth, and protective pouring of the molten steel in the tundish 11 to the crystallizer is achieved. The molten steel is cooled in the crystallizer to form a blank shell 14 with a certain thickness, and the blank shell is continuously pulled out of the crystallizer by a withdrawal and straightening machine (a dummy bar/chain for starting up) to realize continuous casting of molten steel protection.

The utility model discloses in the crystallizer, the redesign and the optimization of outer arc size, the sectional shape of suitable for reading of medium and small section size beam blank crystallizer has been changed, combine to use the thin wall immersion nozzle of the relative maturity of prior art, the protection casting of molten steel from the middle package to the crystallizer has been realized, the technological problem of medium and small section size beam blank full protection casting has been solved, the production implementation degree of difficulty is little, and is easy and simple to handle, can realize the technique of full protection casting very easily, can realize the production of higher grade steel, the scope of medium and small section size beam blank production steel grade has been promoted greatly, effectively promote enterprise variety quality, improve enterprise market competitiveness. The utility model is used for adopt the big section size special-shaped blank of single-point casting mode, changed the flow field distribution of molten steel in the crystallizer, make the molten steel flow more evenly in the crystallizer, improve the continuous casting billet quality.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (3)

1. The utility model provides a novel beam blank crystallizer, a serial communication port, include by interior arc board (76), outer arc board (75), the cavity structure that the copper or the copper pipe of these four directions of left side board (73) and right side board (74) are constituteed, the section of keeping silent (71) and end opening section (72) of cavity structure are H shape, it has the circular arc to rise in the web department of interior arc board (76) and outer arc board (75) to go up mouth section (71), the radian that the circular arc is concave stops and forms the opening radian to the inside one section back of extending of cavity structure, opening radian length (5), opening radian width (4) and opening radian degree of depth (6) form flat funnel type cavity, the central point of flat funnel type cavity is molten steel casting point position (91).

2. The new type of parison crystallizer according to claim 1, characterized in that said inner arc plate (76), outer arc plate (75), left side plate (73) and right side plate (74) all have an inverted taper.

3. The new profile crystallizer as claimed in claim 1 or 2, characterized in that said opening arc width (4) is comprised between 90 and 200 mm; the opening radian depth (6) is 500-850 mm.

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