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A method of applying same-sex charge to suppress nodulation on the inner wall of submerged nozzle

A homogenous charge, immersion technology, used in manufacturing tools, metal processing equipment, casting melt containers, etc., can solve the problems of no ideal improvement in the control effect of nozzle nodules, large process changes, and increased production costs. Achieve the effect of improving the quality of the slab, increasing the number of casting furnaces, and expanding the casting output.

Active Publication Date: 2021-05-25
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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  • A method of applying same-sex charge to suppress nodulation on the inner wall of submerged nozzle
  • A method of applying same-sex charge to suppress nodulation on the inner wall of submerged nozzle
  • A method of applying same-sex charge to suppress nodulation on the inner wall of submerged nozzle

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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 bury 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 car...

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Abstract

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. The technical scheme of the present invention is as follows: a method of applying the same-sex charge to suppress nodulation on the inner wall of the submerged nozzle, applying a stable forward current to the inner wall of the submerged nozzle, so that the sintering and adhesion behavior of inclusions on the inner wall of the submerged nozzle be restricted, thereby inhibiting nozzle nodulation. The method for suppressing nodulation on the inner wall of the submerged nozzle by applying the same-sex charge provided by the present invention can effectively suppress the nodulation behavior on the inner wall of the nozzle through the repulsive force between the charges.

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 Patents(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