CN215919083U - Pouring device for low-oxygen-concentration continuous casting tundish - Google Patents
Pouring device for low-oxygen-concentration continuous casting tundish Download PDFInfo
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- CN215919083U CN215919083U CN202121757719.1U CN202121757719U CN215919083U CN 215919083 U CN215919083 U CN 215919083U CN 202121757719 U CN202121757719 U CN 202121757719U CN 215919083 U CN215919083 U CN 215919083U
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Abstract
The utility model discloses a pouring device for a low-oxygen-concentration continuous casting tundish, which relates to the technical field of steel production and comprises a blowing frame and an air inlet handle, wherein a plurality of air blowing holes are formed in the blowing frame, the air blowing holes are non-uniformly distributed on the inner side of the blowing frame, the air inlet handle and the blowing frame are both of hollow structures and are communicated with each other, the air inlet handle is arranged on one side of the blowing frame, and an air inlet hole is formed in an opening at one end of the air inlet handle. The method can reduce the possibility of air contact with the molten steel to the maximum extent, thereby further improving the purity of the molten steel, effectively reducing the possibility of secondary oxidation of the molten steel and improving the quality of the molten steel. The method can be popularized to various continuous casting machines, promotes the tundish to protect pouring, and reduces the occurrence of secondary oxidation of molten steel.
Description
Technical Field
The utility model relates to the technical field of steel production, in particular to a pouring device of a continuous casting tundish with low oxygen concentration.
Background
The continuous casting tundish is a refractory container between a ladle and a crystallizer. Tundish metallurgy has been developed rapidly in recent years in the steel industry in China, and the aim of the tundish metallurgy is to improve the purity of molten steel and to "clean" the molten steel as much as possible. The molten steel refined outside the furnace can be said to be clean, but the molten steel can be polluted after being poured into a tundish. Therefore, the tundish cannot be regarded as a simple molten steel transfer vessel.
During normal production, a steel ladle falls to the lowest position, a steel ladle lower nozzle is tightly attached to a long nozzle, but the long nozzle is not tightly attached to the steel ladle lower nozzle inevitably caused by deformation of a long nozzle fork frame, steel residue of the steel ladle lower nozzle and operation faults, negative pressure is formed inside the steel ladle lower nozzle and the long nozzle in the pouring process to suck a large amount of air into a tundish, so that secondary oxidation of molten steel is caused, the secondary oxidation is a main source of large inclusions in the molten steel, and particularly when steel containing high easily-oxidizable elements such as stainless steel, aluminum killed steel and the like is poured, the defects of lines, layering, cracking and the like of rolled products are caused due to the improper protection, and meanwhile, the quality, the flowability and the recovery rate of alloy elements of the molten steel are reduced.
Disclosure of Invention
The utility model aims at the technical problems and overcomes the defects of the prior art, and provides a pouring device for a low-oxygen-concentration continuous casting tundish, which comprises an air blowing frame and an air inlet handle, wherein a plurality of air blowing holes are arranged on the air blowing frame, the air blowing holes are non-uniformly distributed on the inner side of the air blowing frame, the air inlet handle and the air blowing frame are both of hollow structures and are communicated with each other, the air inlet handle is arranged on one side of the air blowing frame, and an air inlet hole is arranged at one end opening of the air inlet handle.
The technical scheme of the utility model is further defined as follows:
the pouring device for the continuous casting tundish with low oxygen concentration is characterized in that the air blowing frame is of a quadrilateral structure, and the air blowing holes comprise a first air blowing hole, a second air blowing hole, a third air blowing hole and a fourth air blowing hole which are respectively positioned on four edges of the air blowing frame.
The pouring device for the continuous casting tundish with low oxygen concentration has the blowing frame length of 800-1000mm and the width of 800 mm.
According to the pouring device for the continuous casting tundish with low oxygen concentration, the air inlet handle is positioned on the central line of the air blowing frame.
The pouring device for the continuous casting tundish with low oxygen concentration has the advantages that the air inlet handle is of a linear structure.
The pouring device for the continuous casting tundish with low oxygen concentration has the advantages that the length of the air inlet handle is 1300-1500 mm.
Preceding a package pouring device in middle of low oxygen concentration continuous casting, the frame of blowing and the handle of admitting air all adopt high temperature resistant seamless metal pipe to make, the metal pipe diameter 25mm, wall thickness 2 mm.
The utility model has the beneficial effects that: the method has the advantages that the oxygen concentration near the ladle down nozzle and the long nozzle is reduced as a core, and the probability that oxygen enters molten steel through the joint of the ladle down nozzle and the long nozzle is reduced by reducing the oxygen concentration near the ladle down nozzle and the long nozzle, so that the purity of the molten steel is protected, and the quality of a casting blank is finally improved. A spiral argon blowing mode is initiated, a rotary argon airflow atmosphere is formed near a ladle long nozzle and a ladle lower nozzle in the pouring process, oxygen suction is controlled to the maximum extent, the purity of molten steel is improved, and secondary oxidation of the molten steel is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. a gas source; 2. a tundish cover; 3. an air intake handle; 4. and (4) blowing the air.
Detailed Description
The pouring device for the continuous casting tundish with low oxygen concentration provided by the embodiment has a structure shown in fig. 1 and comprises an air blowing frame 4 and an air inlet handle 3. The blowing frame 4 and the air inlet handle 3 are made of high-temperature-resistant seamless metal tubes and are communicated with each other, the diameter of each metal tube is 25mm, and the wall thickness is 2 mm. The air blowing frame 4 is of a quadrilateral structure, and is 800mm in length and 1000mm in width. The air blowing holes comprise an air blowing hole I, an air blowing hole II, an air blowing hole III and an air blowing hole IV which are respectively positioned at the inner sides of the four edges of the air blowing frame 4. The air inlet handle 3 is a linear structure with the length of 1300 mm and 1500 mm. The air inlet handle 3 is arranged on one side of the air blowing frame 4 and is positioned at the central line position of the air blowing frame 4, and an air inlet hole connected with the air source 1 is arranged at one end opening of the air inlet handle.
When the continuous casting machine is used for casting, the device is arranged on the upper edge of a ladle cover of a pouring impact area of a tundish, an air inlet source 1 is opened, the area of the pouring impact area of the tundish forms a spiral argon sealing area, air is prevented from entering the inner part of the tundish, argon is submerged in the tundish due to the fact that the argon belongs to inert gas, the argon can be filled to rapidly discharge redundant air before the tundish is poured, the ladle falls to the lowest position in the normal pouring process, a rotary argon airflow atmosphere is formed near a lower water opening and a long water opening of the ladle, oxygen suction is reduced to the maximum extent, air is prevented from contacting molten steel, and therefore the purity of the molten steel during pouring is guaranteed, and secondary pollution is reduced.
In order to reduce the oxidation caused by the contact of molten steel and air in the pouring process, the argon sealing of the protective sleeve and the argon blowing in the tundish are adopted in the pouring of the tundish to form an argon atmosphere mode, so that the secondary oxidation is prevented, and the sealing effect is poor inevitably caused by the deformation of the protective sleeve supporting device. The device increases the argon atmosphere around the protective sleeve and the ladle down nozzle on the basis of argon blowing in the protective sleeve and the tundish, and the air blowing holes are arranged at unequal intervals to form spiral airflow with certain atmosphere after air is discharged, so that low-concentration oxygen atmosphere is formed between the ladle down nozzle and the long nozzle, the argon inlet pressure is set to be 0.4-0.6MPa, the flow regulation is 0-150L/min, and the normal setting is 80-150L/min. The method can reduce the possibility of air contact with the molten steel to the maximum extent, thereby further improving the purity of the molten steel, effectively reducing the possibility of secondary oxidation of the molten steel and improving the quality of the molten steel. The method can be popularized to various continuous casting machines, promotes the tundish to protect pouring, and reduces the occurrence of secondary oxidation of molten steel.
In addition to the above embodiments, the present invention may have other embodiments; all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a package pouring device in middle of low oxygen concentration continuous casting which characterized in that: including blowing frame (4) and handle (3) admits air, be equipped with a plurality of holes of blowing on blowing frame (4), hole non-uniform distribution of blowing is in blowing frame (4) are inboard, handle (3) admits air blowing frame (4) are hollow structure and communicate each other, handle (3) admits air locates blow frame (4) one side, its one end is uncovered and is set up the inlet port.
2. A low oxygen concentration continuous casting tundish pouring device according to claim 1, wherein: the air blowing frame (4) is of a quadrilateral structure, and the air blowing holes comprise an air blowing hole I, an air blowing hole II, an air blowing hole III and an air blowing hole IV which are respectively positioned on four edges of the air blowing frame (4).
3. A low oxygen concentration continuous casting tundish pouring device according to claim 2, wherein: the length of the air blowing frame (4) is 800-1000mm, and the width is 800 mm.
4. A low oxygen concentration continuous casting tundish pouring device according to claim 1 or 2, wherein: the air inlet handle (3) is positioned on the central line of the air blowing frame (4).
5. A low oxygen concentration continuous casting tundish pouring device according to claim 1, wherein: the air inlet handle (3) is of a linear structure.
6. A low oxygen concentration continuous casting tundish pouring device according to claim 5, wherein: the length of the air inlet handle (3) is 1300-1500 mm.
7. A low oxygen concentration continuous casting tundish pouring device according to claim 1, wherein: the air blowing frame (4) and the air inlet handle (3) are both made of high-temperature-resistant seamless metal tubes, the diameter of each metal tube is 25mm, and the wall thickness is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121757719.1U CN215919083U (en) | 2021-07-30 | 2021-07-30 | Pouring device for low-oxygen-concentration continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121757719.1U CN215919083U (en) | 2021-07-30 | 2021-07-30 | Pouring device for low-oxygen-concentration continuous casting tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215919083U true CN215919083U (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121757719.1U Active CN215919083U (en) | 2021-07-30 | 2021-07-30 | Pouring device for low-oxygen-concentration continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215919083U (en) |
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2021
- 2021-07-30 CN CN202121757719.1U patent/CN215919083U/en active Active
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