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

A technology of alumina particles and dissolution process, applied in the field of numerical simulation of multiphase flow in aluminum electrolysis, can solve problems such as difficulty in obtaining fluid flow, evolution law of key field parameters in temperature field, retention, lack of coupling and internal correlation, etc., and achieves important Effect of Theoretical Significance and Engineering Practical Value

Active Publication Date: 2021-10-08
JIANGSU UNIV
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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.

Method used

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

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] In this specific embodiment, the dissolution process of alumina particles in a 300kA aluminum electrolytic cell of an electrolytic aluminum plant is taken as a specific example of research for illustration.

[0029] Step 1. Establish a three-dimensional computational geometric model of an industrial aluminum electrolytic cell, and perform grid division and grid encryption in some fluid areas, specifically: figure 1 with 2 As shown, the 300kA aluminum electrolytic cell has a total of 20 groups of carbon anodes, a total of 40 anodes. The basic structural parameters are: the size of the anode...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/18C25C3/20
CPCC25C3/18C25C3/20
Inventor 詹水清江明镅黄雨捷杨建红王军锋
Owner JIANGSU UNIV
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