Method for testing dynamics and interface behaviors of molten slag dissolved solid oxide based on hot filament method

Abstract

The invention relates to a method for testing dynamics and interface behaviors of molten slag dissolved solid oxide based on a hot filament method. The method comprises the following steps: step 1, setting an experimental temperature control curve of hot filament method equipment; step 2, wetting the powder slag with alcohol, adding the wetted powder slag into a melting zone of the hot filament method equipment, and performing heating for melting; step 3, after reaching of the temperature to a set value, adding a certain mass of solid oxide particles into the slag; step 4, observing a dissolution process of the solid oxide particles in situ through a video, processing a picture by utilizing graphic processing software, and calculating an average dissolution rate; and step 5, carrying out quenching and cooling at a set rate to obtain an in-situ test sample, and acquiring parameters or performance indexes of dynamics and interface behaviors of the molten slag dissolved solid oxide through a micro-area analysis means. According to the invention, in-situ observation of the solid oxide dissolving process can be realized; an opaque slag system containing transition metal oxide can be researched; an in-situ sample for micro-area structure and component analysis is obtained through quenching, and the obtained micro-area component analysis sample has good in-situ performance.

Description

technical field [0001] The invention belongs to a new method for testing kinetics and interface behavior of slag-dissolved solid oxides, in particular to a method for testing the kinetics and interface behavior of slag-dissolved solid oxides based on a hot wire method. [0002] technical background [0003] In steel production, it is a very common problem that solid oxides contact and dissolve with slag, and a series of physical and chemical reactions occur. For example, the erosion and dissolution reaction of slag in contact with refractory materials such as blast furnace, converter, iron ladle, ladle, tundish, nozzle, etc., the most commonly used refractory material is Al 2 o 3 , MgO solid oxide; and other examples of steelmaking and refining process refining slag, continuous casting mold slag, tundish covering agent, etc. for high melting point inclusions (the most basic is Al 2 o 3 inclusions) dissolution absorption. At high temperature, the temperature control curve ...

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Problems solved by technology

[0004] Among the above two methods, the rotating cylinder method is carried out in a high-temperature tube furnace, so the dissolution process cannot be observed in situ; at the same time, the cooling rate is small, and an in-situ sample under precise temperature and time conditions cannot be obtained, so it cannot be used for testing. In situ analysis of micro-domain composition, micro-domain structure and interface behavior

Although confocal laser scanning microscopy can obtain in-situ samples under precise temperature and time conditions, it can analyze the micro-area composition, micro-area structure, and interface behavior of the sample in situ, and can also realize in-situ observation of dissolution behavior. However, the cost of the experimental equipment is high, the operation is complicated, and due to the thickness of the slag film and poor light transmission, it is impossible to conduct dissolution kinetics tests on opaque slag systems containing transition metal oxides.

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