Study on heat transfer behavior of copper plate in slab continuous casting at high drawing speed
There is a large temperature gradient in the continuous casting process of crystallizer copper plate, which is prone to deformation.Especially under the condition of high drawing speed, the heat flow and temperature in the mold are higher. The research on the heat transfer of the mold copper plate can provide theoretical basis for the prediction of steel leakage, and then analyze the feasibility of further increasing the drawing speed.
Based on the continuous casting process of low carbon steel produced by shougang jingtang iron and steel union co., LTD., scholars from the university of science and technology in Beijing used ANSYS software to establish a three-dimensional finite element model of heat transfer of mold copper plate, and combined with the field measurement of cooling water and copper plate temperature data, studied the temperature field of mold copper plate under high tension speed.The results show that there is little difference in temperature distribution of copper plate with or without cooling back plate crystallizer.At different pulling speeds, there was a certain temperature-return phenomenon at the bottom of the crystallizer, and with the increase of pulling speed, the temperature-return amplitude increased gradually.The hot surface temperature of copper plate increases with the increase of drawing speed, but the amplitude decreases gradually.Speed of 2.3 m/min, the copper heat surface center the highest temperature of 328.0 ℃, appear below the meniscus around 10 mm;The hot surface temperature of copper plate will increase with the increase of coating thickness.Increasing the amount of water can reduce the copper temperature in a certain range.
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