A numerical simulation method for improving the crystalline quality of fused magnesium lumps

Abstract

The invention provides a numerical simulation method for improving the crystal quality of fused magnesium molten lumps, and relates to the technical field of quality optimization of fused magnesium products. This method first establishes a macro-micro unified model that couples macro-heat transfer, micro-nucleation and growth kinetics, and then uses PROCAST software to numerically simulate the temperature field and microstructure during the cooling and solidification process of fused magnesium. The changes in the overall temperature field of the lump and the grain growth process were visualized and the results analyzed and discussed, and the trend of the influence of supercooling on the microstructure of the fused magnesium lump was analyzed. The present invention performs mathematical physical modeling and numerical simulation on the heat exchange and microstructure formation process during the cooling and solidification process of the fused magnesium lump. By controlling parameters such as heat exchange conditions, the structure is understood and controlled based on its solidification law. Formation, preparation for the production of high-grade periclase, effectively reducing the number of experiments, saving manpower and material resources, thereby improving the quality of actual production of periclase products.

Description

technical field [0001] The invention relates to the technical field of quality optimization of electric fused magnesium products, in particular to a numerical simulation method for improving the crystallization quality of electric fused magnesium fused lumps. Background technique [0002] Magnesium industry includes magnesia refractories, magnesia chemical materials, magnesium metal and magnesium alloys, collectively referred to as magnesia materials industry. Magnesium resources refer to magnesium-containing minerals that can be used to produce magnesia refractory materials, magnesia chemical materials, magnesium metal and other products. China is a country with large magnesium resources, with rich reserves of magnesite, dolomite, brucite and other resources, and its products are widely Used in metallurgy, building materials, chemicals, automobiles, electronics, aerospace, medicine, food, agriculture and animal husbandry and other fields. [0003] Fused magnesia, also know...

AI Technical Summary

Problems solved by technology

my country is currently the world's largest producer and supplier of fused magnesia. However, due to the backward production technology of fused magnesia in China, the traditional smelting method consumes an astonishing amount of electricity, resulting in "high energy consumption" and "high pollution" in the fused magnesia industry. ", "low-grade" status quo, which has a serious impact on the surrounding environment

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