Continuous casting argon blowing stopper rod and preparation method and application thereof

A stopper rod and continuous casting technology, which is applied in the field of continuous casting argon-blowing stopper rod and its preparation, can solve problems such as easy formation of large bubbles, slag roll-out, mold overflow, etc., so as to improve flow control accuracy and purify molten steel The effect of improving quality and improving firmness

Pending Publication Date: 2022-08-09
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, the argon gas blown in through the air guide hole is relatively concentrated, and large bubbles are easily formed in the molten steel, resulting in the liquid level fluctuation of the crystallizer and slag entanglement, resulting in the risk of steel breakout; at the same time, the distribution of the argon gas blown in through the air guide hole is uneven. Uniform, unable to effectively remove the flocculent inclusions initially deposited on the surface of the stopper head. As the flocculent inclusions continue to gather and become larger inclusions, they are washed away by the steel flow and fall off into the crystallizer, causing the crystallizer to overflow. flow accidents; in addition, impurities in molten steel are easily deposited on the surface of the stopper tip, which affects the flow control accuracy of the stopper tip, and it cannot be closed normally when the pouring stops, resulting in the risk of steel breakout

Method used

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  • Continuous casting argon blowing stopper rod and preparation method and application thereof
  • Continuous casting argon blowing stopper rod and preparation method and application thereof
  • Continuous casting argon blowing stopper rod and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0044] combine figure 1 It can be seen that the present invention discloses a continuous casting argon blowing plug rod, which combines figure 1 It can be seen that it includes a stopper rod body 1 and a stopper rod head 2 located at the front end of the stopper rod body 1. The stopper rod body 1 is provided with a tubular argon gas channel 3 leading to the stopper rod head 2. The stopper rod head 2 It is made of mesoporous material, the apparent porosity of the mesoporous material of the present invention is ≥18%, the median diameter of the pore diameter is ≤50 nm, and the apparent porosity of the mesoporous material is further preferably 18-30%, because the apparent porosity is When the rate is too large, the density of the plug head is too low and the structure is loose, which will affect the use effect; if the apparent porosity is too small, the air permeability will be low, which will affect the effect of argon blowing.

[0045] The inside of the stopper head 2 is provid...

Embodiment 2

[0050] The present invention discloses the preparation method of the stopper rod with the structure of the above-mentioned embodiment 1, which comprises the following steps:

[0051] 1) Ingredients: each part of the stopper is mixed with the raw materials by weight according to the ingredient list;

[0052] Wherein, the stopper head 2 is made of mesoporous material, wherein the mesoporous material is made from the following weight percentages of each raw material:

[0053] Sintered corundum 40%~77%, mesoporous corundum 10%~30%, graphite 3%~10%, activated alumina 2%~5%, microporous zirconium aluminum oxide 5%~10%, resin 3%~8 %, plus diluent 0.5%~3%, antioxidant 0.3%~3%;

[0054] The anti-scour layer contains the following weight percentages of each raw material:

[0055] Zirconium corundum 30%~65%, zircon sand 20%~40%, graphite 3%~10%, activated alumina 2%~5%, spinel 5%~10%, resin 3%~8%, Oxidant 0.3% to 3%.

[0056] The material of the stopper rod is a conventional material...

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Abstract

The invention discloses a continuous casting argon blowing stopper rod and a preparation method and application thereof, and belongs to the technical field of steelmaking continuous casting. The stopper rod comprises a stopper rod body and a stopper rod head located at the front end of the stopper rod body, and the stopper rod head is made of mesoporous materials. A tubular argon channel leading to the stopper rod head is arranged in the stopper rod body, more than two spherical air chambers which are connected with the tubular argon channel and are adjacently arranged in the vertical direction are arranged in the stopper rod head, the volume of each spherical air chamber is gradually reduced from top to bottom, and an anti-scouring layer is distributed on the outer side wall of the joint of the stopper rod body and the stopper rod head in the circumferential direction; and the mesoporous material and the anti-scouring layer are special formula raw materials designed by the invention. The stopper rod can completely eliminate the problem of argon blowing concentration, ensures that argon with stable flow is blown into molten steel dispersedly to form small and uniform bubbles so as to eliminate the influence of large bubbles on the fluctuation of the liquid level of a crystallizer, effectively removes flocculent inclusions at the rod head, improves the flow control precision, improves the argon blowing effect and purifies the quality of the molten steel.

Description

technical field [0001] The invention relates to using a plug rod to blow argon in the continuous casting process for improving the casting state of the nozzle, belonging to the technical field of steelmaking and continuous casting, and in particular to a continuous casting argon blowing plug rod and a preparation method and application thereof. Background technique [0002] The stopper rod is one of the "three major pieces" of steelmaking and continuous casting, and it is a functional refractory material for continuous casting. The stopper mainly plays the role of opening and closing the tundish. In addition to the automatic control of the molten steel flow between the tundish and the mold in cooperation with the submerged nozzle or the upper nozzle, it can also blow argon into the tundish through the argon blowing function of the stopper. gas and other inert gases, the stopper has both the function of controlling the steel flow and purifying the molten steel. The stopper i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/16B22D11/117
CPCB22D41/16B22D11/117Y02P10/20
Inventor 姚亚双李烨郑吉红王心一
Owner WUGANG REFRACTORY CO LTD
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