A device and method for simulating the initial solidification of molten steel near the corner of a continuous casting mold
A continuous casting mold and solidification simulation technology, applied in the field of steel continuous casting, can solve problems such as affecting the accuracy of simulation results, high experimental costs, and limited data acquisition.
Active Publication Date: 2018-05-01
CENT SOUTH UNIV
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Problems solved by technology
Industrial field experiments and small-scale pilot-scale continuous casting machine experiments are the most ideal methods to study the initial solidification behavior of molten steel, but there are several disadvantages: the experiment is dangerous, it is difficult to accurately control the experimental conditions we need and obtain real-time data ; High consumption of raw materials, high energy consumption and affect the normal production process, resulting in high experimental costs
The mathematical model is based on certain assumptions, and requires comprehensive and accurate boundary conditions and physical parameters. However, the acquisition of these data is relatively limited. These factors will affect the accuracy of the simulation results. It is difficult for the simulation results to fully and accurately reflect the molten steel. Initial Solidification Behavior in a Crystallizer Involving Complex, High Temperature, Multiphase and Transient "Three Passes and One Response" Phenomena
Laboratory thermal simulation mainly includes low melting point metal continuous casting simulation and steel high temperature continuous casting simulation. Low melting point metal continuous casting simulation can conveniently and effectively study the influence of continuous casting conditions on the initial solidification behavior of metals, but it cannot truly reflect molten steel The initial solidification process of molten steel, and the influence of mold powder on the initial solidification behavior of molten steel cannot be studied
Badri et al. and Sohn et al. used a mold thermal simulation device to simulate the initial solidification of high-temperature molten steel in the mold, which is more realistic than mathematical simulation and low-melting point metal continuous casting simulation, but the crystallizer of the device mold With only one cooling surface, it is not possible to study the initial solidification behavior of the molten steel in the vicinity of the corners of the mold
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Embodiment 1
[0099] In the embodiment, the used thermocouple is produced by Omega Company, the model is K-type armored thermocouple, and its diameter is 0.5mm.
[0100] In this example, according to figure 1 The initial solidification simulation device of molten steel near the corner of the continuous casting mold is formed by connecting various parts, according to figure 2 , image 3 , Figure 4 Design the crystallizer.
[0101] Wherein the width of the first copper plate surface (23) is 30mm;
[0102] The width of the second copper plate surface (24) is 30mm;
[0103] The thickness of the crystallizer first side wall (25) is 20mm;
[0104] The thickness of crystallizer second side wall (26) is 20mm;
[0105] The width of crystallizer first outer wall (27) is 50mm;
[0106] The width of the second outer wall (28) of the crystallizer is 50 mm.
[0107] The first group of thermocouples (29) and the second group of thermocouples (30) are in the same plane, and the plane is perpendic...
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Abstract
The invention provides an initial solidification simulating device and method for molten steel near a corner portion of a continuous casting crystallizer and belongs to the technical field of continuous casting of steel. The simulating device provided with the right-angle crystallizer is used for simulating the forming process of an initial solidification blank shell near the corner portion in the crystallizer in the practical continuous casting process, and meanwhile temperature data in the blank drawing process are obtained by utilizing a high-rate temperature measuring thermocouple buried in the crystallizer; a right angle is formed by two copper plates of the crystallizer, and thermocouples are buried in copper plate faces and the right angle position correspondingly; the initial solidification behavior of the molten steel near the corner portion of the crystallizer is studied according to processing and analyzing of the temperature data and with the combination of the initial solidification blank shell obtained in an experiment, the generation mechanism of defects on the surface of the cast blank corner portion is accurately known, and therefore the defects on the surface of the cast blank corner portion are removed or reduced by taking corresponding measures, and it is of great significance in guiding practical production.
Description
technical field [0001] The invention relates to a device and method for simulating the initial solidification of molten steel near the corner of a continuous casting crystallizer, and belongs to the technical field of continuous casting of iron and steel. Background technique [0002] The quality defects of continuous casting slabs include internal quality defects and surface quality defects. On the one hand, slab defects will affect the production efficiency, yield and final product performance of the continuous casting machine, thereby reducing the economic benefits of production; on the other hand, with the continuous casting With the development of continuous rolling and thin strip slab continuous casting technology, the quality requirements of continuous casting slabs are also getting higher and higher. Therefore, it is an important task for metallurgists to produce defect-free slabs or tolerable slabs that do not affect the performance of the end product. According to...
Claims
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IPC IPC(8): B22D11/16
CPCB22D11/16
Inventor 王万林吕培生张海辉肖丹路程龙旭凯高尔卓
Owner CENT SOUTH UNIV