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Device and method for physical simulation of electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting

A physical simulation and electromagnetic field technology, applied in the field of steel continuous casting, can solve the problems of different simulation results, large simulation result errors, unclear electromagnetic field refinement mechanism, etc., and achieve the effect of strong operability and simple method

Active Publication Date: 2021-10-12
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the characteristics of high temperature and opacity in continuous casting production, it is extremely difficult to measure the flow field and electromagnetic field in the molten steel in the secondary cooling zone of continuous casting under the action of electromagnetic field, resulting in the refinement mechanism of electromagnetic field is still unclear
At present, numerical simulation is mainly used to study the distribution of electromagnetic field and flow field inside molten steel in the secondary cooling zone of continuous casting. However, in the process of simulation analysis, boundary conditions and material properties are often simplified, which leads to large errors in simulation results, and Different models and discretization forms will also make the simulation results different

Method used

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  • Device and method for physical simulation of electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting
  • Device and method for physical simulation of electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting
  • Device and method for physical simulation of electromagnetic field and flow field in molten steel in secondary cooling zone of continuous casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 adopts figure 1 Unit shown, melt flow rate measured from bottom of reservoir

[0018] (1) add GaInSn low-melting point alloy with a height of 75mm in the liquid storage device made of plexiglass tube with an inner diameter of 10mm, an outer diameter of 12mm, and a height of 100mm;

[0019] (2) Place three flow field measurement devices at the center, 1 / 2R and edge of the bottom of the liquid storage device respectively, and insert the electromagnetic field measurement device from the top of the liquid storage device into the GaInSn low melting point alloy;

[0020] (3) Move the coil with an inner diameter of 12mm, an outer diameter of 22mm and a height of 50mm to the bottom of the liquid storage device through the control system;

[0021] (4) Set the upward movement speed of the coil to 0.01m / s through the control system, the pulse current intensity passed into the coil is 1000A, the frequency is 30Hz, and the pulse width is 3ms;

[0022] (5) Simultaneous...

Embodiment 2

[0023] Embodiment 2 adopts figure 1 Unit shown, melt flow rate measured from bottom of reservoir

[0024] (1) Add a GaInSn low-melting point alloy with a height of 4000mm to the liquid storage device made of a plexiglass tube at the bottom, the inner diameter of which is made of stainless steel, the outer diameter is 2100mm, and the height is 5000mm;

[0025] (2) Place three flow field measurement devices at the center, 1 / 2R and edge of the top of the liquid storage respectively, and insert the electromagnetic field measurement device from the top of the liquid storage device into the GaInSn low melting point alloy;

[0026] (3) Move the coil with an inner diameter of 2100mm, an outer diameter of 2200mm and a height of 300mm to the bottom of the liquid storage device through the control system;

[0027] (4) Through the control system, the speed of the upward movement of the coil is set to 1m / s, the pulse current intensity passed into the coil is 2000A, the frequency is 5Hz, a...

Embodiment 3

[0029] Embodiment 3 adopts figure 1 Unit shown, melt flow rate measured from bottom of reservoir

[0030] (1) adding the high 2000mm GaInSn low-melting point alloy to the inner diameter made by the plexiglass tube is 1000mm, the outer diameter is 1100mm, and the liquid storage device with a height of 2500mm;

[0031] (2) Place three flow field measurement devices on the bottom, center and upper part of the liquid storage side wall respectively, and insert the electromagnetic field measurement device into the GaInSn low melting point alloy from the top of the liquid storage device;

[0032] (3) Move the coil with an inner diameter of 1100mm, an outer diameter of 1200mm and a height of 300mm to the bottom of the liquid storage device through the control system;

[0033] (4) Through the control system, the speed of the upward movement of the coil is set to 0.5m / s, the pulse current intensity passed into the coil is 3000A, the frequency is 10Hz, and the pulse width is 20ms;

[0...

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Abstract

The present invention proposes a physical simulation device and method for the electromagnetic field and flow field in the secondary cooling zone of continuous casting, including a physical simulation system for the secondary cooling zone, a two-dimensional mobile device, an electromagnetic field and flow field measurement system and a control system. When using this device to measure the electromagnetic field and flow field distribution in the secondary cooling zone of continuous casting, first add a certain amount of liquid alloy with a low melting point to the liquid storage device, and then move the electromagnetic field generator to the bottom of the liquid storage device, and then set the electromagnetic field generator through the control system The speed of upward movement. After the setting is completed, turn on the motor switch to control the upward movement of the electromagnetic field generating device, thereby simulating the downward casting process of the billet during continuous casting. At the same time, the electromagnetic field and flow field measuring device measures the low temperature of the liquid storage device. Magnetic field distribution and flow field distribution of melting point liquid alloy. The invention can physically simulate the flow of molten steel in the secondary cooling zone of continuous casting, and accurately measure the distribution law of the electromagnetic field and the flow field in the secondary cooling zone, so as to provide help for studying the mechanism of the electromagnetic field on the secondary cooling zone of continuous casting.

Description

technical field [0001] The invention belongs to the technical field of continuous casting of iron and steel, in particular to a physical simulation device and method for electromagnetic field and flow field in molten steel in a secondary cooling zone of continuous casting. Background technique [0002] At present, more than 90% of steel products are produced by continuous casting. However, due to fractional crystallization and volume shrinkage, defects such as composition segregation and shrinkage porosity will inevitably occur during the solidification process of metals. For special steels with high content of alloying elements, these defects are particularly prominent, and have become the bottleneck of continuous casting slab quality improvement. Therefore, reducing and eliminating various defects in the continuous casting slab has become the key to improving the quality and output of continuous casting production. [0003] The study found that the electromagnetic field a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08G01P5/00B22D11/22G09B23/18
CPCB22D11/225G01P5/00G01R29/0871G09B23/181
Inventor 叶春洋苏月莹徐燕祎张云虎申延平陈湘茹徐智帅翟启杰
Owner SHANGHAI UNIV