Production of prebaked anodes for aluminum electrolysis cells: dominant trends, technology, quality

Galevskiy, G V; Руднева, В. В.; Galevskiy, S G

doi:10.1088/1757-899x/866/1/012008

Cited by 2 publications

(3 citation statements)

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“…The expression for p at time n + 1 can be found by substituting (7) in (6) and then applying (2), which provides…”

Section: The Fluid Dynamics Modelmentioning

confidence: 99%

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Attenuation of magnetohydrodynamic oscillations in an aluminum reduction cell using periodic structures

Andere¹,

Oliveira²

2021

9th Edition of the International Conference on Computational Methods for Coupled Problems in Science and Engineering

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Magnetohydrodynamic instability (MHD) in an aluminum reduction cell is due to the interactions between the conductive liquid currents and the magnetic field generated by very high currents flowing through current feeding circuit buses. Such phenomenon creates oscillations in this fluid, compromising the efficiency of the process aluminum reduction. The reduction cells consist, in their usual configuration, of a container with flat walls that accommodates the liquid. In this work, a new geometry is proposed for the container based on periodic structures, with the aim of to mitigate such oscillations. The analysis of oscillations of fluid in both configurations is made with a software developed in this work to numerically simulate the process in two dimensions. The numerical formulation employed is based on the finite-difference time-domain method to solve the Navier-Stokes equations (N-S) explicitly through the Chorin projections method. The volume and surface of the fluid are mapped using the MAC method. The liquid is treated as incompressible and viscous, in addition to being electrically conductive. The accelerations caused by magnetic field and the electric currents are coupled to N-S by calculating the Lorentz Force. The results are analyzed by calculating differences between liquid heighs obtained at rest and by applying electric currents.

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“…The expression for p at time n + 1 can be found by substituting (7) in (6) and then applying (2), which provides…”

Section: The Fluid Dynamics Modelmentioning

confidence: 99%

“…There are two basic types of reduction cells: the Soderberg and the Prebake cell [6]. Soderberg cells have a large anode and Prebake smaller anodes.…”

Section: Introductionmentioning

confidence: 99%

Attenuation of magnetohydrodynamic oscillations in an aluminum reduction cell using periodic structures

Andere¹,

Oliveira²

2021

9th Edition of the International Conference on Computational Methods for Coupled Problems in Science and Engineering

View full text Add to dashboard Cite

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“…The influence of raw material quality, process formulation, preheating of dry material, mixing and kneading of paste, cooling of paste and vibratory forming on the quality of anode production was discussed by engineer Liu Ruiran in the context of research results on raw anode production and quality control [11] . The basic technology of mixing and kneading was described and the direction of improvement was pointed out [12] . Li Xianlei proposed that the bulk density of prebaked anodes has a direct impact on the quality of the roasted anode products, and looked for the reasons from the processes of raw materials, batching, mixing and kneading, and forming respectively, and made effective improvements to address the specific problems, increasing the bulk density of raw anodes and improving the performance of anodes [13] .…”

Section: Introductionmentioning

confidence: 99%

Intelligent sensing and analysis of the working conditions of carbon kneading machines

Wang¹,

Zhao²,

Jiang³

et al. 2023

International Conference on Computer, Artificial Intelligence, and Control Engineering (CAICE 2023)

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China's production of carbon for aluminum electrolysis has ranked first in the world for 19 consecutive years and has become the world's largest exporter of carbon for aluminum electrolysis production. In the process of carbon mixing and kneading, the uniformity of paste is an important factor affecting the quality of carbon anodes. In this paper, an intelligent sensing system is designed for modelling and analysis of the paste uniformity index. The system collects the three-phase voltage/current, stirrer speed and stirrer rotation angle of the carbon kneader in real time, calculates the active power, stirrer torque and stirrer rotation angle according to a specific cycle, and establishes a soft measurement model of the relationship between stirrer torque and time and rotation angle. During the kneading process, 72 torque time series are generated at 5° intervals, and the torque variation pattern at the same angle is analyzed in relation to the homogeneity of the paste, thus forming a criterion for the end point of the kneading process. A comparison with actual data from the field shows that the system is stable and reliable and can accurately determine the end point of kneading, avoiding manual errors in judgement and improving the level of automation and quality of kneading, while improving the performance of the carbon anode and achieving energy saving and consumption reduction.

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Production of prebaked anodes for aluminum electrolysis cells: dominant trends, technology, quality

Abstract: The analysis of the current state of world and domestic production of calcined anodes for aluminum electrolysis cells is carried out. The dominant trends are identified, the basic technology is described, and directions for its improvement are indicated.

Cited by 2 publications

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Attenuation of magnetohydrodynamic oscillations in an aluminum reduction cell using periodic structures

Attenuation of magnetohydrodynamic oscillations in an aluminum reduction cell using periodic structures

Intelligent sensing and analysis of the working conditions of carbon kneading machines

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