Determination method for activity coefficient of solute component in metal melt at high temperature

Abstract

The invention belongs to the field of metallurgy experiment at a high temperature, in particular to a determination method for an activity coefficient of a solute component in metal melt at the high temperature. A double-crucible reference method comprises two experimental group reacting crucibles and a reference crucible. Appropriate reference metal is selected from the reference crucible to balance with MOx oxide, so that the activity coefficient of M in the reference metal is determined. Crucibles with similar materials are utilized as the two experimental crucibles, the reference metal and solvent metal to be researched are respectively put in the two experimental crucibles, and proportions of balancing slag are completely the same. When the balancing is carried out in the same experiment and the same atmosphere, according to the M content in the metal and the activity coefficient of M in the reference metal, the activity coefficient of M in the metal melt is obtained. By the adoption of the method, the difficulty of the metallurgy experiment at the high temperature is lowered, the experimental cost is decreased, and the obtained data is more accurate and reliable.

Description

Technical field: [0001] The invention belongs to the field of high-temperature metallurgy experiments, in particular to a method for measuring the activity coefficient of solute components in high-temperature metal melts. Background technique: [0002] Metal melts such as molten steel and molten iron are not only the main products of the pyrometallurgical process, but also the direct participants of the multiphase reaction in the smelting process. Many physical processes and chemical reactions in the steelmaking process are carried out between molten steel and slag, and the physical and chemical properties of the metal melt have an important impact on the thermodynamics and kinetics of the smelting process. [0003] The metal melt in the metallurgical process is dissolved in a variety of non-metallic elements and metal elements. In order to improve the mechanical properties of steel and make the metal have various special properties, various alloying elements such as silico...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a new research method of double crucible reference, which can solve the problem of unknown activity coefficient of oxides in molten slag

It overcomes the shortcomings of studying slag and molten metal separately at present, and can obtain the activity coefficient and other thermodynamic properties of the solute component M of the metal melt in one high-temperature experiment

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