Method for determining thicknesses of solid-liquid slag lubricating films on basis of temperature measuring continuous-casting mold of thermoelectric couple

Abstract

The invention relates to a method for determining the thicknesses of solid-liquid slag lubricating films on the basis of a temperature measuring continuous-casting mold of a thermoelectric couple, belonging to the field of mathematical model application of ferrous metallurgical continuous casting process, comprising the following steps: step 1, acquiring initial data; step 2, determining the thickness of the solid slag lubricating film and the thickness of the liquid slag lubricating film at a meniscus area of the mold; and step 3, displaying a result of the thickness of the solid slag lubricating film and the thickness of the liquid slag lubricating film in an online manner. The method has the advantages that on the basis of mass balance and heat flow balance, an equation for calculating the thicknesses of the lubricating films at the meniscus of the continuous casting mold is deduced, and under the premise of installing the thermoelectric couple at the meniscus area, temperature data detected in real time is imported to a mathematical model so as to realize real-time calculation of the thicknesses of the lubricating films.

Description

technical field [0001] The invention belongs to the application field of mathematical models of iron and steel metallurgical continuous casting process, and in particular relates to a method for determining the thickness of a solid-liquid slag lubricating film of a continuous casting crystallizer based on thermocouple temperature measurement. Background technique [0002] During continuous steel casting, the mold slag spread on the molten steel surface in the crystallizer absorbs the heat provided by the high-temperature molten steel, and quickly forms a liquid slag layer on the liquid steel surface. The sintering layer is a transitional form, and on the sintering layer is the powder slag layer that maintains the original state, which is the three-layer structure of mold slag on the molten steel surface in the mold; on the other hand, the liquid slag in the liquid slag layer changes with the mold cycle The reciprocating vibration continuously infiltrates into the air gap bet...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of lack of means for calculating the thickness of the liquid slag film in the meniscus area of ​​the continuous casting mold, the present invention proposes a method for determining the thickness of the lubricating film of the solid-liquid slag in the continuous casting mold based on thermocouple temperature measurement, so as to achieve online calculation of the meniscus area Solid and liquid slag lubricating film thickness and provides process data for liquid friction calculations

Images