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Method for applying isotropic charges so as to inhibit nodulation in inner wall of submersed nozzle

A same-sex charge and immersion technology, which is applied in the direction of manufacturing tools, metal processing equipment, casting molten material containers, etc., can solve the problems of large process changes, increased production costs, and unsatisfactory improvement in nozzle nodulation control effects, etc. Achieve the effects of increasing the number of casting furnaces, expanding casting output, and improving the quality of casting slabs

Active Publication Date: 2019-05-10
NORTHEASTERN UNIV LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the actual production process, the above nozzle nodulation methods will seriously increase the production cost due to large process changes
And when dealing with steel with high aluminum content, the control effect of nozzle nodulation has not been ideally improved

Method used

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  • Method for applying isotropic charges so as to inhibit nodulation in inner wall of submersed nozzle
  • Method for applying isotropic charges so as to inhibit nodulation in inner wall of submersed nozzle
  • Method for applying isotropic charges so as to inhibit nodulation in inner wall of submersed nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Aluminum-killed steel 10B21 was selected as the casting object for testing. Experiments were carried out on a continuous casting machine with one machine and eight streams, and one of the streams was selected to apply DC current to the submerged nozzle, and the corresponding normal casting stream was used as a comparative experiment.

[0029] Before casting, first groove the surface of the original aluminum-carbon submerged nozzle, and then embed a metal molybdenum wire with a diameter of 1.5mm inside the submerged nozzle, and seal it with high-temperature cement and refractory cotton to prevent the molybdenum metal from being damaged during the casting process. The thread is oxidized. And the external extension is used to connect the direct current power source far away. After the sealing is completed, the nozzle is preheated and baked at a high temperature before casting, and the baking time is 2 hours. After the baking is completed, the formal casting is carried ou...

Embodiment 2

[0035] The aluminum-killed steel SWRCH35K was selected as the casting object for the test. Experiments were carried out on a continuous casting machine with one machine and eight streams, and one of the streams was selected to apply DC current to the submerged nozzle, and the corresponding normal casting stream was used as a comparative experiment.

[0036] Before casting, first groove the surface of the original aluminum-carbon submerged nozzle, and then embed a metal molybdenum wire with a diameter of 1.5mm inside the submerged nozzle, and seal it with high-temperature cement and refractory cotton to prevent the molybdenum metal from being damaged during the casting process. The thread is oxidized. And the external extension is used to connect the direct current power source far away. After the sealing is completed, the nozzle is preheated and baked at a high temperature before casting, and the baking time is 2 hours. After the baking is completed, the formal casting is ca...

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Abstract

The invention belongs to the field of metallurgy continuous casting, in particular to a method for applying isotropic charges so as to inhibit nodulation in the inner wall of a submersed nozzle. According to the technical scheme, the method for applying the isotropic charges so as to inhibit the nodulation in the inner wall of the submersed nozzle is characterized in that stable forward current isapplied to the inner wall of the submersed nozzle, so that sintering and adhesion behaviors of inclusions in the inner wall of the submersed nozzle are limited, and then the nodulation of the nozzleis inhibited. The method for applying the isotropic charges so as to inhibit the nodulation in the inner wall of the submersed nozzle can effectively inhibit the nodulation behavior of the inner wallof the nozzle by virtue of the acting force that like charges repel.

Description

technical field [0001] The invention belongs to the field of metallurgical continuous casting, and in particular relates to a method for suppressing nodulation on the inner wall of a submerged nozzle by applying charges of the same sex. Background technique [0002] Compared with the significant improvement of the thermal shock resistance of the nozzle material, its nodule blockage, hanging slag and slag line erosion have become common service failure problems in the service process of the submerged nozzle. Severe nozzle nodulation may even cause complete blockage of the submerged nozzle, which in turn leads to production accidents in which continuous casting is interrupted. [0003] Effective control and prevention of nodules in the submerged nozzle during the continuous casting process has been a subject that has been explored and perfected in the continuous casting process. At present, the main method of controlling nozzle nodulation is generally by controlling the amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/50
Inventor 田晨袁磊于景坤翟晓毅肖国华徐斌孙江波李海斌杨鑫刘朝阳贾丹彬
Owner NORTHEASTERN UNIV LIAONING