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A Nodulation Analysis Method for Continuous Casting Nozzle

A nodule and nozzle technology, applied in the field of continuous casting nozzle nodule analysis to avoid pouring interruptions or accidents

Active Publication Date: 2022-03-29
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing research and methods still lack quantitative evaluation of nodulation rate and nodulation degree, and the established models are all based on fixed nodulation patterns, which are different from the dynamic nodulation phenomenon in actual production. There is an urgent need for corresponding research to obtain research data closer to actual production and establish a more reliable nozzle nodulation evaluation method to provide guidance for judging the degree of nodulation in actual production and taking corresponding early warning measures

Method used

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  • A Nodulation Analysis Method for Continuous Casting Nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Construct the molten steel continuous casting model according to the ratio of 2:1, set a tundish model nozzle in the tundish model of the molten steel continuous casting model, set a mold model and a submerged nozzle in the molten steel continuous casting model . Water was circulated throughout the model to a flow rate of 24.5 L / min through the flow control device. Organic ferromagnetic particles with an average particle size of 100 micrometers are used. The camera uses a long exposure time of 2.0 seconds to record the movement of the organic ferromagnetic particles. And a total of 10 simulation experiments were performed, the electromagnetic field varied from 1 to 10 Tesla, and the step size of the electromagnetic field change in each simulation experiment was 1. The process of loading the electromagnetic field in each simulation experiment can include:

[0064] (1) An electromagnetic field is applied to the nozzle of the ladle model, and the organic ferromagnetic p...

Embodiment 2

[0068] Construct the molten steel continuous casting model according to the ratio of 2.5:1, set a tundish model nozzle in the tundish model of the molten steel continuous casting model, set a mold model and a submerged nozzle in the molten steel continuous casting model . Water was circulated throughout the model to a flow rate of 16.8 L / min through the flow control device. Ferric oxide particles with an average particle size of 20 micrometers are used. The camera uses a long exposure time of 1.0 second to record the movement of the ferric oxide particles. And a total of 20 simulation experiments were performed, the electromagnetic field was changed within 0.1 to 2.0 Tesla, and the step size of the electromagnetic field change in each simulation experiment was 0.1. The process of loading the electromagnetic field in each simulation experiment can include:

[0069] (1) Load an electromagnetic field to the nozzle of the ladle model, so that the ferroferric oxide particles are...

Embodiment 3

[0072] The molten steel continuous casting model is constructed according to the ratio of 4:1. Two tundish model nozzles are set in the tundish model of the molten steel continuous casting model, and two mold models and two molds are set in the molten steel continuous casting model. Submerged spout. Water was circulated throughout the model to a flow rate of 12.3 L / min through the flow control device. Organic ferromagnetic particles with an average particle size of 50 microns are used. The camera uses a long exposure time of 1.0 second to record the movement of the ferric oxide particles. And a total of 9 simulation experiments were performed, the electromagnetic field was changed within 0.05 to 0.5 Tesla, and the step size of the electromagnetic field change in each simulation experiment was 0.05. The process of loading the electromagnetic field in each simulation experiment can include:

[0073] (1) Load an electromagnetic field to the nozzle of the ladle model, so that t...

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Abstract

The invention discloses a continuous casting nozzle nodulation analysis method. The method includes: constructing a corresponding molten steel continuous casting model; using the molten steel continuous casting model to perform multiple simulation experiments, and the process of each simulation experiment includes: Add water into the ladle model; add ferromagnetic particles into the ladle model; record the movement track and liquid level of ferromagnetic particles in the nodulation state, nodule formation process and nodule shedding process by the camera state data; determine the nodulation behavior data and the state change of the liquid level; determine the relationship between the state change of the liquid level and the nodulation behavior data. The method provided by the present invention is closer to the nodulation phenomenon in the actual continuous casting production process, and the relationship curve can provide guidance for judging the nodulation degree in the actual production process, so as to provide corresponding early warning measures when necessary to avoid casting interruption Or the occurrence of an accident, so it is very practical.

Description

technical field [0001] The invention relates to the technical field of molten steel continuous casting, in particular to a continuous casting nozzle nodulation analysis method. Background technique [0002] In the process of molten steel continuous casting, due to factors such as the deposition of inclusions on the inner wall of the nozzle, the reaction of elements in the steel and refractory materials, and other factors, nozzle nodules occur from time to time. Nozzle nodulation will change the flow state in the nozzle channel, tundish and mold, and even lead to pouring interruption or accidents. Therefore, the research on nozzle nodule phenomenon in the continuous casting process is particularly important. The nodules at the nozzle are mainly deoxidized products, solidified steel and complex oxide aggregates, etc. The causes of nodules at the nozzle are different under different conditions. Nodules caused by precipitation, nodules caused by the reaction of refractory mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18B22D11/115
CPCB22D11/18B22D11/115
Inventor 张江山张丹刘青杨树峰李京社
Owner UNIV OF SCI & TECH BEIJING
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