Testing device and method for comprehensive heat transferring flow of protective slag of continuous casting crystallizer

Abstract

The invention discloses a testing device and method for comprehensive heat transferring flow of protective slag of a continuous casting crystallizer. The method comprises the following steps: a graphite crucible is used for melting the protective slag for continuous casting and keeping the protective slag warm in an electric induction furnace, and ingredients and temperature of the protective slag are uniform and consistent; a positioning electrode is used for calibrating the liquid level of a melting pool, a copper mold for simulating the crystallizer is inserted into a protective slag pool in a molten state under mechanical driving, water is introduced into the copper mold for cooling, and the liquid protective slag is quickly cooled on the copper mold so as to form a protective slag film; a temperature data acquisition system tests process temperature data by four thermoelectric couples in two rows embedded in the copper mold, and the heat transferring flow passing through the protective slag is calculated in real time by a computer; in the whole process, vibration with certain amplitude and frequency of the copper mold can be realized, and the vibration mode of the continuous casting crystallizer in the process of metallurgical production of steel iron can be simulated. The method disclosed by the invention has the advantages that the liquid level of the melting pool can be accurately controlled, the comprehensive heat transferring flow of the protective slag is tested in real time, and the data accuracy is high; the testing process is convenient, stable and reliable, and the experimental cost is low.

Description

technical field [0001] The invention relates to a test device and method for comprehensive heat transfer performance of continuous casting crystallizer mold slag in steel production process. Background technique [0002] In the continuous casting process, the initial solidification point of the slab—the meniscus in the mold is a crucial place, because it is not only the growth point of the initial solidification shell, but also the breeding ground for various surface defects. In order to improve the surface quality of the slab, since the birth of continuous casting technology, the heat transfer and solidification behavior in this area has been paid attention to. [0003] However, since this area is a multi-component (steel, mold slag, mold), multiphase (liquid, solid mold slag, molten steel and solidification shell) and unsteady state (mold vibration, molten steel and mold slag are continuously replenished) ) complex physical and chemical process, which brings great difficu...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a comprehensive heat transfer and heat flow testing device and method for mold slag in continuous casting molds to solve the problem of molten steel, mold slag, and mold in the existing iron and steel metallurgy continuous casting process. The heat flow between them cannot be monitored in real time, and the thermodynamic changes of the mold slag during the heat transfer process cannot be observed in situ, so as to reproduce the actual working conditions in the continuous casting process

Images