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Continuous casting nozzle nodule analysis method

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

Active Publication Date: 2021-09-24
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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  • Continuous casting nozzle nodule analysis method

Examples

Experimental program
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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 nodule analysis method. The method comprises the following steps: constructing a corresponding molten steel continuous casting model; adopting the molten steel continuous casting model for multiple simulation experiments, wherein the process of each simulation experiment comprises the steps: adding water into a steel ladle model; adding ferromagnetic particles into the steel ladle model; recording the motion trail of the ferromagnetic particles and the state data of the liquid level in the nodule-free state, the nodule forming process and the nodule falling process through a camera; determining nodulation behavior data and the state change of the liquid level; and determining the relationship between the state change of the liquid level and the nodulation behavior data. According to the method, the nodulation phenomenon is closer to that in the actual continuous casting production process, guidance can be provided for judging the nodulation degree in the actual production process through the relation curve, and accordingly, corresponding early warning measures are provided when necessary, pouring interruption or accidents are avoided, and therefore the method has very practical significance.

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 Applications(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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