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Stopper rod with crusting preventing heat preservation function

A technology of anti-crust and stopper, which is applied in the direction of manufacturing tools, casting molten material containers, metal processing equipment, etc., can solve the problems of physical hazards of workers in the workshop environment, failure to prevent the temperature drop of molten steel, and pollution of molten steel, so as to improve the casting slab Quality, improving the environment of the continuous casting workshop, and ensuring the effect of smooth progress

Pending Publication Date: 2019-05-10
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of tundish covering agent will be added during the entire steel pouring process. Although the covering agent has positive significance in reducing the temperature loss of molten steel and promoting the floating of inclusions in molten steel, the covering agent is foreign to pure molten steel after all. The use of too much covering agent will cause certain pollution to the molten steel, and the covering agent will produce certain pollutants in the process of melting or burning, which is harmful to the workshop environment and the body of the workers, and the covering agent can only affect the molten steel in the tundish The temperature drop of the liquid surface can delay or reduce the temperature drop, but it cannot prevent the occurrence of the temperature drop of the molten steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A stopper rod with anti-crust and heat preservation functions, such as figure 2 As shown, it includes the club tail, the club body 4, the club head 7, and the transition layer 6 between the club body 4 and the club head 7. The interior of the club body 4 is provided with an inner cavity 5, and the inner cavity 5 passes through the transition layer. 6. The main function of the rod head is to cooperate with the nozzle bowl of the tundish to control the flow. In order to maintain a good flow control effect of the rod head during the steel pouring process, its ability to resist molten steel erosion must be strong, and the transition layer is only in the The bar body material and the bar head material play a transitional role, and its ability to resist molten steel erosion is poor. The reason why the transition material is not penetrated to the bar head is because the transition layer and the bar head material are not synchronized in resisting molten steel erosion. In order...

Embodiment 2

[0030] Wind the resistance wire 3 made of nickel-chromium material with a wire diameter of 2.5 mm into 5 rings with a diameter of 50 mm, and put it in the center of the core rod when the stopper rod is formed, and part of the resistance wire 3 exposes the tail of the rod, so that the resistance wire 3 The wire 3 is 25mm away from the outer body of the stopper, and is molded together with the stopper mud in a 125MPa isostatic press. After demoulding the formed stopper rod, connect it to the external power supply through the resistance wire 3 under the voltage of 220V, and at the set heating rate, after 1 hour, the inside of the stopper rod is equipped with the resistance wire 3 part, and passes through the temperature measuring gun The measured temperature is 251°C, which is lower than the set heating rate requirement. After continuing to heat up for 3 hours, the part 3 of the resistance wire on the stopper turns red. At this time, the measured temperature of this part is 1074°C...

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Abstract

The invention provides a stopper rod with a crusting preventing heat preservation function. A rod tail, a rod body, a rod head and a transition layer between the rod body and the rod head are included. An inner cavity is formed in the rod body and penetrates through the transition layer. The end, close to the rod tail, of the outer side wall of the inner cavity is provided with a wire block. A power interface is arranged on the rod tail and connected with a resistance wire. The resistance wire is surrounded in the rod body and located at the outer portion of the inner cavity, and a plurality of circles of resistance wire is arranged. The stopper rod can conduct heating when steel slag at the stopper rod slag line part is crusted, the steel slag is melted, and control over the stopper rod from crusted steel slag is eliminated. Meanwhile, in the whole steel pouring process, a large amount of heat can get lost from the tundish molten steel liquid surface, consequently, the temperature ofthe molten steel is reduced, the steel pouring temperature requirement for normal steel pouring is not met, the stopper rod can heat the molten steel liquid surface in the whole steel pouring process,molten steel liquid surface temperature drop is avoided, smooth proceeding of the steel pouring process is ensured, and the quality stability of a casting blank is guaranteed.

Description

technical field [0001] The invention relates to the field of continuous casting functional refractory materials, in particular to a stopper rod with the function of crust prevention and heat preservation. Background technique [0002] At present, in the process of continuous casting and pouring steel, stopper rods are mainly used for flow-controlled pouring. In the normal flow control process of the stopper rod, the crusts mainly come from the solidification of substances such as slag from the ladle, manual addition of tundish covering agent to the inside of the tundish, and floating inclusions in molten steel inside the tundish when encountering low temperature. During the flow control process, the stopper rod will move up and down with a certain frequency along with the stopper rod control mechanism. Once the steel slag encrustation occurs at the slag erosion of the stopper rod, the stopper rod will be fixed to prevent the normal operation of the stopper rod. The stopper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/18
Inventor 周胜强徐业兴鄢凤明郭钰龙王次明王晓东刘丽任林
Owner 北京利尔高温材料股份有限公司
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