A multi-scale modeling and calculation method for the dissolution process of aluminum electrolytic alumina particles

Abstract

The invention discloses a multi-scale modeling and calculation method for the dissolution process of aluminum electrolytic alumina particles, which establishes a three-dimensional computational geometric model of an industrial aluminum electrolytic cell and performs grid division; establishes an accurate description of the coalescence and coalescence of bubbles in the melt of the aluminum electrolytic cell The mesoscopic-scale mathematical model of crushing behavior; accurately derive the three-dimensional gas-liquid phase force data on the melt in the aluminum electrolytic cell, and couple and embed the three-dimensional space data of the electromagnetic force on the melt and the gas-liquid phase force Set processing; build a multi-scale liquid-solid two-phase flow model describing the dissolution process of alumina particles in the aluminum electrolytic cell, coupling multi-phase flow, multi-physics field effects, heat and mass transfer between phases, and the shrinkage behavior of alumina particles. The method of the present invention can accurately calculate and predict the dissolution behavior of alumina particles in large-scale industrial aluminum electrolytic cells, has good applicability and popularization, and is helpful to scientifically guide the optimization design of industrial aluminum electrolytic alumina blanking process. Provide theoretical guidance for efficient and stable production of actual aluminum electrolytic cells.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation of aluminum electrolysis multiphase flow, and in particular relates to a multi-scale modeling and calculation method for the dissolution process of aluminum electrolysis alumina particles. Background technique [0002] As a typical traditional metallurgical industry with high energy consumption, high pollution and high carbon emissions, the aluminum electrolysis industry's green transformation is not only related to the realization of the country's binding goals for energy conservation and emission reduction, but also related to the transformation of the country's green economic development. Therefore, in the context of the country's advocacy of energy conservation, emission reduction and low-carbon economy, exploring and developing high-efficiency, energy-saving and environmentally friendly aluminum electrolysis technology is an important development idea and direction that needs to b...

AI Technical Summary

Problems solved by technology

At present, the relevant traditional experimental research methods still mainly focus on the qualitative analysis and description of the alumina particle dissolution process in the laboratory's extremely small-scale electrolytic cell, and it is difficult to obtain and characterize the macroscopic fluid flow, temperature field, and alumina concentration in the industrial cell. Evolution law of key field parameters such as

Related traditional simplified mathematical modeling research often ignores the dissolution behavior of actual alumina particles, and lacks an in-depth scientific and quantitative description of the dissolution and diffusion behavior of alumina particles, as well as their coupling effects and internal correlations with multiphases, multifields, etc.

Images