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A method for formulating the stirring position of the built-in electromagnetic stirrer in the billet crystallizer

An electromagnetic stirrer and electromagnetic stirring technology, which is applied in the field of iron and steel smelting and continuous casting technology, can solve the problems of lack of theoretical guidance on flow field behavior, incorrect stirring position, and deterioration of stirring effect, etc.

Inactive Publication Date: 2016-02-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that if the stirring position is not correct, the stirring effect will deteriorate
Most of the existing technologies are improved for electromagnetic stirring equipment, but there is little research on the electromagnetic stirring model of the billet built-in mold. not tall

Method used

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  • A method for formulating the stirring position of the built-in electromagnetic stirrer in the billet crystallizer
  • A method for formulating the stirring position of the built-in electromagnetic stirrer in the billet crystallizer
  • A method for formulating the stirring position of the built-in electromagnetic stirrer in the billet crystallizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The method for formulating the stirring position of the built-in electromagnetic stirrer of the billet crystallizer, the specific steps are as follows:

[0082] (1) Establish a flow field model

[0083] (1.1) Numerical simulation of billet mold flow field without magnetic field

[0084] The flow field in the billet crystallizer is mainly turbulent flow. According to fluid mechanics, the main parameters to be considered in establishing the turbulent flow field model are the velocity of the fluid in the X, Y, and Z directions in the coordinate system and the turbulent flow of the fluid. Kinetic energy and turbulent pulsation dissipation rate, set the speed in X, Y, Z direction with u, v, w, the turbulent pulsation kinetic energy of the fluid is expressed with K, turbulent pulsation dissipation rate with It means that the above main parameters need to be calculated on the basis of discretization equations, and the speed U(u, v, w) of the above main parameters in the X, Y, ...

Embodiment 2

[0150] The method for formulating the stirring position of the built-in electromagnetic stirrer of the billet crystallizer, the specific steps are as follows:

[0151] (1) Establish a flow field model

[0152] (1.1) Numerical simulation of billet mold flow field without magnetic field

[0153] The flow field in the billet crystallizer is mainly turbulent flow. According to fluid mechanics, the main parameters to be considered in establishing the turbulent flow field model are the velocity of the fluid in the X, Y, and Z directions in the coordinate system and the turbulent flow of the fluid. Kinetic energy and turbulent pulsation dissipation rate, set the speed in X, Y, Z direction with u, v, w, the turbulent pulsation kinetic energy of the fluid is expressed with K, turbulent pulsation dissipation rate with It means that the above main parameters need to be calculated on the basis of discretization equations, and the speed U(u, v, w) of the above main parameters in the X, Y...

Embodiment 3

[0219] The method for formulating the stirring position of the built-in electromagnetic stirrer of the billet crystallizer, the specific steps are as follows:

[0220] (1) Establish a flow field model

[0221] (1.1) Numerical simulation of billet mold flow field without magnetic field

[0222] The flow field in the billet crystallizer is mainly turbulent flow. According to fluid mechanics, the main parameters to be considered in establishing the turbulent flow field model are the velocity of the fluid in the X, Y, and Z directions in the coordinate system and the turbulent flow of the fluid. Kinetic energy and turbulent pulsation dissipation rate, set the speed in X, Y, Z direction with u, v, w, the turbulent pulsation kinetic energy of the fluid is expressed with K, turbulent pulsation dissipation rate with It means that the above main parameters need to be calculated on the basis of discretization equations, and the speed U(u, v, w) of the above main parameters in the X, Y...

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Abstract

The invention relates to a method for setting the stirring position of an internally-arranged electromagnetic stirrer of a small square billet crystallizer, and belongs to the technical field of iron and steel smelting continuous casting processes. The setting method includes the steps that firstly, a numerical model of a flow field of the small square billet crystallizer is built without the effect of a magnetic field, based on the model, an electromagnetic field under electromagnetic parameters is fixed through coupling, a mass conservation equation, a momentum equation, a turbulent flow double-equation and an electromagnet control equation are introduced to correct the model, a numerical simulation model of the flow field of the small square billet crystallizer under the effect of the electromagnetic field is built, according to the model with the magnetic field, a visual flow field model under the condition that the fixed areas of the crystallizer acquired through the stirring positions of different internally-arranged electromagnetic stirrers is actually compared and judged, the generated stirring effect is determined, and then the reasonable stirring position of the internally-arranged electromagnetic stirrer is determined. By the adoption of the method, according to the actual condition of the internally-arranged electromagnetic stirrer of the crystallizer, a reasonable assumption is conducted, and then the reasonable electromagnetic stirring position is determined.

Description

technical field [0001] The invention relates to a method for setting the stirring position of a built-in electromagnetic stirrer in a billet crystallizer, and belongs to the technical field of iron and steel smelting and continuous casting technology. Background technique [0002] Mold is the last link to control the cleanliness of molten steel in the continuous casting process. The flow behavior of molten steel in the mold directly affects the separation and removal of inclusions in molten steel, the influence of mold slag inclusion and the uniform formation of solidified primary shells. Therefore It is closely related to the surface and internal defects of the continuous casting slab. In addition, because the electromagnetic field can affect the flow state of molten steel in the mold, strengthen the convection, mass transfer and heat transfer state of molten steel, and improve the quality of continuous casting slabs, electromagnetic stirring technology has been widely adop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/115B22D11/18
Inventor 张桂芳施哲高磊孙辉李金柱曹阳
Owner KUNMING UNIV OF SCI & TECH
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