Method for determining melting behavior and melting point of slag-like material

Abstract

The invention relates to a method for determining a melting behavior and a melting point of a slag-like material, belonging to the technical field of detection of metallurgical slag-like material. The process comprises slag sample preparation, slag sample formation, high-temperature laser sample filling, experimental parameter setting, melting process observation and data and image processing. The method provided by the invention has the advantages that the defect of low accuracy of the slag column deformation method, i.e. the hemisphere point temperature testing method, in the traditional melting point testing can be overcome, and the limitations of difficulties in control of the stability of testing conditions and high testing costs in the method of slag melting in liquid steel can be eliminated. The initial melting temperature of the slag sample from the solid phase to the liquid phase and the melting temperature of the slag sample to the full liquid phase can be captured promptly so as to accurately determine the melting point of the slag sample; and the liquid phase nucleation, growth and other melting changes and behaviors of the slag sample in the heating process can also be analyzed, the direct theoretical basis and technical support can be provided for the curing of liquid slag and the control of metallurgical reaction in the steel-making and iron-making process, and different characteristics of different slag samples in the melting process can be used as an important means for evaluation of high-temperature properties of different slag samples.

Description

technical field [0001] The invention belongs to the technical field of detection of metallurgical slag materials, and in particular provides a method for measuring the melting behavior and melting point of slag materials, which is suitable for research on blast furnace slag, mold slag and other slag materials. Background technique [0002] The smelting process requires the slag to have good fluidity, and the high-speed continuous casting requires the mold slag to have a low melting temperature to ensure a sufficient supply of liquid slag, and the melting temperature of the slag is important for selecting the power supply parameters of the electric furnace smelting to ensure a suitable slag temperature and a relatively high temperature. Low power consumption is also of great significance. Therefore, the melting temperature of slag determines the temperature system in metallurgical engineering. If the melting temperature of slag is high and the viscosity of slag is too high, i...

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Problems solved by technology

[0016] The invention uses a high-temperature laser confocal microscope to observe the melting behavior of slag in situ, continuously, and dynamically during the entire heating process, and overcomes the shortcomings of the traditional melting point test method, which only uses the slag column deformation method, that is, the hemispherical point temperature test method is not high in accuracy. And the limitations of the stability of the measurement conditions of the molten steel slag method are difficult to control and the measurement cost is high

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