Determination method of copperplate heat flux based on mass balance and heat balance continuous casting mould

Abstract

The invention discloses a determination method of copperplate heat flux based on mass balance and heat balance continuous casting mould, which belongs to the field of numerical calculation and application in ferrous metallurgical continuous casting process. The method comprises the steps of (1) acquiring raw data, (2) acquiring the consumption rate of mould powders,(3) acquiring molten slag layer thickness (d1) and solid slag layer thickness (ds) by utilizing the equation models of mass balance and heat balance,(4) acquiring heat-flow density q, (5) constructing the physical model of crystallizers, calculating thermocouple temperature Tc and comparing the calculated value Tc with the measured value Td. The above method has the advantages of coupling the mass balance of mould powder consumption and the energy balance of molten steel heat transfer. According to the method of the invention, specific boundary condition equations are obtained by regression method after the temperature and heat flow value of specific locations being determined, without being heavily dependent on specific equations of heat transfer boundary.

Description

technical field [0001] The invention belongs to the application field of numerical calculation in iron and steel metallurgical continuous casting process, in particular to a method for determining the heat flux density of copper plates in continuous casting crystallizers based on mass balance and heat balance. Background technique [0002] Continuous casting plays an important role in the manufacturing process of steel products as a continuous production process, and one of the important functions of the mold, which is called the "heart of continuous casting machine", is an efficient heat transfer device. Most of the solidification sensible heat and latent heat injected into the molten steel through the submerged nozzle are dissipated in the mold, and the heat transfer of the mold directly determines the quality of the slab, the condition of the equipment and the continuous casting process. Therefore, research on the thermal behavior of mold slag lubricating film and air gap...

AI Technical Summary

Problems solved by technology

Among them, giving the empirical equation of heat flux in advance is the prerequisite and key to accurately determine the boundary conditions of heat flux and heat transfer. The empirical equations related to heat flux were established, and the undetermined coefficients of the equations were determined. However, the proposed empirical equations are only applicable to the corresponding continuous casting process, and the direct application cannot accurately give the boundary conditions of heat flux applicable to the general continuous casting process. Especially when the operating conditions change with the working conditions, the heat transfer boundary conditions still need to be re-determined, which lacks flexibility and timeliness

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