Impact zone pouring protection device and continuous casting tundish

Abstract

The utility model relates to the technical field of continuous casting, and discloses an impact zone pouring protection device and a continuous casting tundish, the impact zone pouring protection device comprises a protection assembly arranged right above an impact zone, and the protection assembly can be opened for installing a sleeve or can be closed for covering the impact zone. An argon supply system is arranged on the protection assembly and used for replacing air in the impact area and maintaining the air in the impact area in an argon atmosphere. According to the utility model, the protection assembly and the argon supply system are matched with each other, so that the bareness time of molten steel in the impact area is shortened, the argon supply system can maintain an argon atmosphere in the impact area with a relatively small argon supply amount, and the secondary oxidation risk of the molten steel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to continuous casting technical field, concretely relates to a kind of impact zone pouring protection device and continuous casting tundish. BACKGROUND

[0002] At present, most of the steel plant in domestic impact zone of continuous casting machine lacks special protection pouring measure, especially when pouring first ladle, it usually needs to consume time more than three minutes from ladle pouring to molten steel completely covering impact zone of tundish and touching and invading lower port of sleeve, in this period of time, molten steel is exposed to air for a long time, leading to serious secondary oxidation problem, which not only affects molten steel quality, but also can cause damage to equipment. SUMMARY

[0003] The utility model discloses a kind of impact zone pouring protection device, to solve the problem that molten steel of continuous casting tundish is exposed to air for a long time in pouring process, leading to secondary oxidation, and then affecting molten steel quality.

[0004] To achieve the above object, the utility model provides an impact zone pouring protection device, including the protection assembly being set in the impact zone directly above, the protection assembly is set to be opened to install sleeve, or it can be closed to cover the impact zone, argon supply system is provided on the protection assembly, and the argon supply system is used to replace and maintain argon atmosphere in the impact zone.

[0005] Preferably, the protection assembly includes two half-arc-shaped protection plates, the two protection plates are set to be away from each other to install the sleeve, or close to each other to cover the impact zone;Recess part is provided at the relative position of the two protection plates, and the two protection plates are close to each other to form sleeve hole through the recess part to avoid the sleeve.

[0006] Preferably, a plurality of gas outlets are provided on the protection plate, and the plurality of gas outlets are uniformly and spacedly arranged on the protection plate, so that the argon flow of the argon supply system blows into the impact zone.

[0007] Preferably, the aperture of the gas outlet is 5mm.

[0008] Preferably, the spacing of adjacent two gas outlets on the protection plate is 100mm.

[0009] Preferably, the argon supply amount of the argon supply system is set to be adjustable, so that the argon pressure in the impact zone is 0.2-0.3MPa.

[0010] Preferably, the fixed device is installed in the middle position of ladle cover of continuous casting tundish, and the fixed device is used to install the protection assembly.

[0011] Preferably, the tail of the fixing device is provided with an argon pipe joint, and the argon supply system provides argon to the impact area through the argon pipe joint.

[0012] Preferably, the argon pipe joint is provided with two.

[0013] The utility model also provides a continuous casting tundish, the continuous casting tundish has above-mentioned impact area pouring protection device.

[0014] Through the above technical scheme, the protection assembly can be opened to install the sleeve and closed to cover the impact area, and the argon supply system replaces the air in the impact area and maintains argon atmosphere, thereby reducing the risk of secondary oxidation of molten steel in the pouring process. Specifically, through the cooperation of the protection assembly and the argon supply system, the argon supply system can maintain the argon atmosphere in the impact area with relatively less argon supply amount while reducing the exposure time of molten steel in the impact area, thereby reducing the risk of secondary oxidation of molten steel.

[0015] The impact area pouring protection device provided by the utility model can reduce the oxide impurities in the molten steel, improve the purity of the molten steel and the quality of the casting blank, and further improve the pouring environment of the molten steel and reduce the risk of damage of the equipment due to oxidation corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a top view of the impact area pouring protection device provided by the utility model;

[0017] Figure 2 is a side view of the impact area pouring protection device provided by the utility model.

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 1, sleeve; 10, tundish shell; 11, retaining wall; 111, through hole; 101, impact area; 102, pouring area; 20, protection assembly; 21, protection plate; 211, recessed part; 212, air outlet hole; 30, argon supply system. DETAILED DESCRIPTION

[0020] The specific embodiments of the utility model are described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0021] In the embodiment of the utility model, the continuous casting tundish includes tundish shell 10, the middle part of tundish shell 10 is provided with two interval setting baffle 11, two baffle 11 is used to separate tundish shell 10 and form an impact area 101 and two pouring area 102, the impact area 101 is located in the middle position, two pouring area 102 is located the both sides of impact area 101 and symmetrically sets up, baffle 11 is provided with through -hole 111 for the communication of impact area 101 and both sides pouring area 102.

[0022] In combination with Figure 1 And Figure 2 As shown in the utility model provides a kind of impact area pouring protection device, for the pouring protection of impact area 101.The impact area pouring protection device includes the protection assembly 20 being set in the direct upper side of impact area 101, the protection assembly 20 is set to be able to open to install sleeve 1, or can be closed to be used to cover impact area 101, the protection assembly 20 is provided with argon supply system 30, and the argon supply system 30 is used to replace and maintain as argon atmosphere in impact area 101.

[0023] In the technical scheme provided by the utility model, by setting the protection assembly 20 in the direct upper side of impact area 101, the protection assembly 20 can be opened to install sleeve 1, and can be closed to cover impact area 101, cooperate with argon supply system 30 to replace and maintain as argon atmosphere in impact area 101, to reduce the risk of secondary oxidation of molten steel in pouring process.Specifically, by the mutual cooperation of protection assembly 20 and argon supply system 30, while reducing the exposure time of molten steel in impact area 101, argon supply system 30 can maintain argon atmosphere in impact area 101 with relatively less argon supply amount, reduce the risk of secondary oxidation of molten steel.

[0024] Further, the impact area pouring protection device provided by the utility model can reduce the oxide impurities in molten steel, improve the purity of molten steel and the quality of casting blank;In addition, the impact area pouring protection device provided by the utility model can also improve the pouring environment of molten steel, reduce the risk of damage of equipment due to oxidation corrosion.

[0025] In the utility model, the role of protection assembly 20 is to reduce the air flow inside and outside impact area 101, prevent oxygen from entering to reduce the risk of secondary oxidation of molten steel;And, the setting of protection assembly 20 can also play the effect of resisting high temperature impact.

[0026] In some embodiments of the utility model, the protection assembly 20 includes two half-arc protection plates 21, the two protection plates 21 are set to be capable of moving away from each other for installing the sleeve 1, or moving close to each other for covering the impact area 101, further, recessed parts 211 are arranged at the relative positions of the two protection plates 21, and the two protection plates 21 are spliced to form a sleeve hole through the recessed parts 211 when moving close to each other for avoiding the sleeve 1. Exemplarily, the protection plate 21 can be designed as a half-arc structure similar to the wings of a beetle, and the sleeve hole left at the middle position facilitates the operation of sleeving the sleeve 1.

[0027] In the embodiments of the utility model, the two protection plates 21 can realize the action of moving away from each other or moving close to each other through any appropriate structure, for example, automatic control through mechanical or electrical transmission devices, specifically, moving away from each other when installing the sleeve 1, moving close to each other after the sleeve 1 is installed in place, and the recessed parts 211 arranged at the relative positions of the two protection plates 21 are spliced to form a sleeve hole for avoiding the sleeve 1.

[0028] In the utility model, a plurality of air outlets 212 are arranged on the protection plate 21, the plurality of air outlets 212 are evenly spaced on the protection plate 21, and the argon gas blown into the impact area 101 by the argon gas supply system 30 flows out. Through the above arrangement, the argon gas blown in by the argon gas supply system 30 can be uniformly distributed in the impact area 101, so as to ensure that the entire impact area 101 is maintained as an argon atmosphere, so as to avoid the oxidation of molten steel and affect the purity of molten steel and the quality of casting blank.

[0029] The number and specific size of the air outlet 212 are not specially limited in the utility model, exemplarily, in some embodiments of the utility model, the aperture of the air outlet 212 is 5mm. The distance between two adjacent air outlets 212 on the protection plate 21 is 100mm.

[0030] In some embodiments of the utility model, the argon gas supply amount of the argon gas supply system 30 is set to be adjustable, so that the argon gas pressure in the impact area 101 is 0.2-0.3MPa.

[0031] It should be noted that the argon gas supply system 30 can adopt conventional techniques in the art, and the adjustment of the argon gas supply amount can also be easily realized through a valve, as long as the argon gas pressure in the impact area 101 of the continuous casting tundish is maintained within the above range, so as to ensure that the molten steel poured into the impact area 101 will not be oxidized again.

[0032] In some embodiments, a fixing device is installed in the middle position of the tundish cover of the continuous casting tundish, and the fixing device is used to install the protection assembly 20. The tail of the fixing device is provided with an argon pipe joint, and the argon supply system 30 provides argon to the impact area 101 through the argon pipe joint. The argon pipe joint is provided with two.

[0033] When the protection device is used to protect the impact area 101 of the continuous casting tundish, before the molten steel is poured, the two protection plates 21 of the protection assembly 20 are checked and confirmed to be in a state of approaching each other, that is, in a closed state, and the argon supply system 30 is prepared. When the sleeve 1 is ready to be installed, the protection assembly 20 is opened, that is, the two protection plates 21 are moved away from each other. After the sleeve 1 is installed in place, the protection assembly 20 is quickly closed, and at the same time, the argon supply system 30 is started to introduce argon into the impact area 101 to replace air. During the pouring of the molten steel, the argon supply amount is continuously monitored and adjusted to ensure that the argon pressure in the impact area 101 is 0.2-0.3 MPa, and the protection effect is ensured.

[0034] The utility model also provides a continuous casting tundish, the continuous casting tundish has above-mentioned impact area pouring protection device. In the continuous casting tundish with above-mentioned impact area pouring protection device provided by the utility model, through the combination of protection assembly 20 and argon supply system 30, the exposure time of molten steel in impact area 101 and the risk of secondary oxidation are reduced significantly. As the secondary oxidation is avoided, the oxide inclusions in the molten steel can be reduced, the purity of the molten steel and the quality of the casting blank can be improved by the continuous casting tundish provided by the utility model. In addition, the pouring environment can be improved, and the risk of damage to the equipment due to oxidation corrosion can be reduced by the continuous casting tundish provided by the utility model. Furthermore, the continuous casting tundish provided by the utility model can reduce the manual operation time and improve the production efficiency and safety through automatic control. Furthermore, the continuous casting tundish with above-mentioned impact area pouring protection device provided by the utility model has the beneficial effects of improving product quality, prolonging equipment life and improving production efficiency.

[0035] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited thereto. Within the technical concept range of the utility model, the technical scheme of the utility model can be subjected to various simple modifications. In order to avoid unnecessary repetition, the utility model will not be described again for various possible combination modes. However, these simple modifications and combinations should also be regarded as the disclosed content of the utility model and belong to the protection range of the utility model.

Claims

1. A casting protection device for impact zone, characterized in that: The invention comprises a protective assembly (20) arranged directly above an impact zone (101), wherein the protective assembly (20) is configured to be open for installing a sleeve (1) or to be closed for covering the impact zone (101), and an argon supply system (30) is provided on the protective assembly (20), and the argon supply system (30) is used to replace the air in the impact zone (101) and maintain an argon atmosphere.

2. The impact zone casting protection device according to claim 1, characterized in that: The protection assembly (20) comprises two semi-arc-shaped protection plates (21), and the two protection plates (21) are arranged to be able to move away from each other for installing the sleeve (1), or to move close to each other for covering the impact zone (101); Concave portions (211) are provided at relative positions of the two protective plates (21); when the two protective plates (21) are brought close to each other, they are spliced ​​together through the concave portions (211) to form a sleeve hole for avoiding the sleeve (1).

3. The impact zone casting protection device according to claim 2, characterized in that: The protective plate (21) is provided with a plurality of gas outlet holes (212), and the plurality of gas outlet holes (212) are evenly spaced on the protective plate (21) to allow the argon gas blown into the impact zone (101) by the argon supply system (30) to flow out.

4. The impact zone casting protection device according to claim 3, characterized in that: The diameter of the air outlet hole (212) is 5 mm.

5. The impact zone casting protection device according to claim 3, characterized in that: The distance between two adjacent air outlet holes (212) on the protective plate (21) is 100 mm.

6. The impact zone casting protection device according to claim 1, characterized in that: The argon supply amount of the argon supply system (30) is set to be adjustable so that the argon pressure in the impact zone (101) is 0.2-0.3 MPa.

7. The impact zone casting protection device according to any one of claims 1 to 6, characterized in that: A fixing device is installed at the middle position of the cover of the continuous casting tundish, and the fixing device is used to install the protection component (20).

8. The impact zone casting protection device according to claim 7, characterized in that: An argon pipe joint is provided at the tail of the fixing device, and the argon supply system (30) supplies argon to the impact zone (101) through the argon pipe joint.

9. The impact zone casting protection device according to claim 8, characterized in that: There are two argon gas pipe joints.

10. A continuous casting tundish, characterized in that: The continuous casting tundish has the impact zone pouring protection device according to any one of claims 1 to 9.

Images