Argon blowing protection long-life stopper rod

Abstract

The utility model discloses an argon blowing protection long-life stopper rod, which comprises a stopper rod body, the stopper rod body comprises a body upper section, a slag line section, a body lower section and a rod head, the slag line section is provided with a plurality of slit-type argon channels from inside to outside, the slit-type argon channels are communicated with an air inlet channel arranged at the center of the stopper rod body, and the stopper rod body is provided with an air inlet. A rod head is arranged at the bottom of the lower body section; the stopper rod is simple in structure, argon forms a layer of air curtain around the slag line section when the stopper rod is used, the slag line is prevented from being eroded by steel slag, and the service life of the stopper rod is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of continuous casting of molten steel, in particular to a long-life stopper with argon protection. BACKGROUND

[0002] The stopper is a refractory rod installed in the water gap of the tundish, which adjusts the opening of the upper water gap bowl to control the flow of molten steel by lifting displacement. The stopper used in some steel plants is eroded and thinned at the slag line due to the erosion of steel slag, causing the stopper to break. Especially in the process of long pouring continuous casting, the stopper is severely eroded by molten slag and molten steel, and the stopper is eroded too quickly, the stopper breaks and cannot control the flow rate, causing emergency stop pouring. The conventional improvement method is to thicken the slag line section to prolong the service life of the stopper. CONTENT OF THE UTILITY MODEL

[0003] In view of the defects of the prior art, the present application provides a long-life stopper to solve the above problems.

[0004] To achieve the above purpose, the present application realizes the following technical scheme: a long-life stopper with argon protection, comprising a stopper body, the stopper body comprising an upper body section, a slag line section and a lower body section, the slag line section being provided with a plurality of slit-type argon channels from inside to outside, the slit-type argon channels being in communication with the gas inlet channels provided in the interior of the stopper body, and the lower body section being provided with a rod head at the bottom.

[0005] Preferably, the number of slit-type argon channels is 3-10.

[0006] Preferably, the slit-type argon channels can be straight or curved.

[0007] Preferably, the width of each slit-type argon channel is not greater than one-third to one-half of the total length of the slag line, and the thickness is ≤1.5mm.

[0008] Preferably, the upper body section, the slag line section, the lower body section and the rod head are of an integrated structure.

[0009] The present application provides a long-life stopper with argon protection. Compared with the prior art, the present application has the following beneficial effects:

[0010] The present application is provided with a plurality of slit-type argon channels from inside to outside at the slag line section, the slit-type argon channels being in communication with the gas inlet channels provided in the interior of the stopper body, so that a layer of gas curtain is formed around the slag line of the stopper by argon, reducing the erosion of the slag line by steel slag and improving the service life of the stopper. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a structural schematic diagram of the utility model;

[0012] Fig. 2This is a cross-sectional view of the slag line segment of this utility model. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] This embodiment provides an argon-blown protective long-life stopper rod, such as... Figs. 1-2 As shown, the device includes a stopper rod body, which comprises an upper section 1, a slag line section 2, and a lower section 3. The slag line section 2 has five slit-type argon gas channels 5 arranged from the inside out. The slit-type argon gas channels are either straight or curved. The width of each slit-type argon gas channel is no greater than one-third to one-half of the total length of the slag line, and the thickness is ≤1.5mm. The slit-type argon gas channels 5 are connected to the gas inlet channel 6 arranged inside the stopper rod body. A rod head 4 is provided at the bottom of the lower section. The upper section, slag line section, lower section, and rod head are all integral structures.

[0015] In this embodiment, several slit-type argon gas channels are provided from the inside to the outside of the slag line section. These slit-type argon gas channels are connected to the air inlet channel provided inside the stopper rod body, so that argon gas forms a gas curtain around the slag line of the stopper rod, reducing the erosion of the slag line by steel slag and improving the service life of the stopper rod.

[0016] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0017] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-life, argon-blown, protected stopper rod comprising a stopper rod body, characterized by: The stopper rod body comprises an upper body section, a slag line section and a lower body section, the slag line section is provided with a plurality of slit-shaped argon gas channels from inside to outside, the slit-shaped argon gas channels are communicated with the gas inlet channels arranged in the stopper rod body, and the lower body section is provided with a rod head at the bottom.

2. The long-life, argon-blown, protected stopper rod of claim 1, wherein: The number of the slit-shaped argon gas channels is 3-10.

3. The long-life, argon-blown, protected stopper rod of claim 2, wherein: The slit-shaped argon gas channels can be straight or curved.

4. The long-life, argon-blown, protected stopper rod of claim 3, wherein: The width of each slit-shaped argon gas channel is not greater than one third to one half of the total length of the slag line, and the thickness is less than or equal to 1.5 mm.

5. The long-life, argon-blown, protected stopper rod of claim 1, wherein: The upper body section, the slag line section, the lower body section and the rod head are of an integrated structure.

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