Continuous-casting casting powder comprehensive heat transfer heat flow testing method

Abstract

The invention discloses a continuous-casting casting powder comprehensive heat transfer heat flow testing method, which includes the following steps: melting, keeping the heat and continuous casting the casting powder in induction furnaces through a carbon crucible, enabling ingredients and temperature of the casting powder to be uniform and accordant; pouring the molten casting powder in a copper base, performing liquid protection and quick cooling the casting powder in the copper base, so as to form a subtransparent vitreous casting power film; pouring out and sending the casting power film to a heat preserving furnace for thermal insulation, performing stress relieving and annealing, taking out and cooling the casting power film, so as to prepare an experimental used powder film; and cautiously placing the experimental used powder film in a copper mould of a testing system, adjusting the experimental position of the copper mould in place, starting a power supply for experiment execution, during the experiment, collecting temperature data at different positions in the copper mould through a thermocouple sensor inserted in the copper mould, and calculating out the heat transfer flow passing by the casting slag through a computer in a real-time manner. Through the adoption of the method provided by the invention, temperature of a blank housing can be accurately controlled, the precision for testing the horizontal comprehensive heat transfer heat flow data of the casting powder is high, test pieces can be prepared conveniently, stably and reliably, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to a test method for the comprehensive heat transfer performance of continuous casting mold slag in the iron and steel production process. Background technique [0002] In the continuous casting process, the meniscus of the initial solidification point of the slab 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 difficulties to theoret...

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 test method for continuous casting mold slag to solve the problem of heat flow between molten steel, mold slag and crystallizer in the existing iron and steel metallurgical continuous casting process. Implementation of monitoring, the problem that the thermodynamic changes of mold flux in the heat transfer process cannot be observed in situ, and the actual working conditions in the continuous casting process can be reproduced

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