Improving the Understanding of Busbar Design and Cell MHD Performance

Arkhipov, Alexander; Alzarooni, Abdalla; Jasmi, Amal Al; Potocnik, Vinko

doi:10.1007/978-3-319-51541-0_82

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…The velocity field has been successfully modelled and validated against experiments using the ESTER/PHOENICS [3,7]. Similar validation of the velocity fields, magnetic fields, electric current distribution and the wave oscillation frequencies were achieved using the specialised package MHD-VALDIS [3,8,9] using more streamlined approach to save time and effort for the commercial implementation. This software is based on the full MHD model of the electrolysis cell applied to a particular commercial cell replicated in the model using the specialised input suitable for fast implementation.…”

Section: Introductionmentioning

confidence: 86%

Anode Bottom Burnout Shape and Velocity Field Investigation in a High Amperage Electrolysis Cell

Bojarevics

Radionov

Tretiyakov

2018

The Minerals, Metals &Amp; Materials Series

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Long term burnout shape of the anode bottom is believed to reflect the quasi-stationary liquid metal interface dome-shaped deformation. The shape profiles and their interplay affect the MHD stability, the velocity fields, set up of new anodes and electrical efficiency of the cell. Spent prebake anode bottom profiles were systematically measured at Rusal 309 kA cell to obtain the overall view of the liquid metal deformation. The magnetic field distribution and velocities of liquid metal flow were measured in order to obtain a more complete characterization of the cell. The results are compared to the modelling results using the specialised MHD-VALDIS software giving the insight to the cell dynamics.

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Section: Introductionmentioning

confidence: 86%

Anode Bottom Burnout Shape and Velocity Field Investigation in a High Amperage Electrolysis Cell

Bojarevics

Radionov

Tretiyakov

2018

The Minerals, Metals &Amp; Materials Series

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“…Для усовершенствования работы электролизеров и автоматизации производства при одновременном увеличении энергоэффективности разрабатываются новые алгоритмы управления, построенные на моделировании сложного технологического процесса, включая разработку математической модели растворения и распределения глинозема. Начиная с 1980-х годов работы по исследованию и разработке математических моделей растворения глинозема проводятся многими ведущими алюминиевыми компаниями и исследовательскими центрами [1][2][3][4][5][6][7][8][9].…”

Section: Introductionunclassified

Viscosity of conventional cryolite-alumina melts

Руденко

Катаев

Zaykov

et al. 2021

Izv.VUZ. Tsvet. Met.

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The study covers the viscosity of NaF–AlF3–CaF2–Al2O3 conventional cryolite-alumina melts with a cryolite ratio CR = 2.3 depending on the CaF2, Al2O3 content and temperature. The viscosity of cryolite-alumina electrolyte samples prepared under laboratory conditions and electrolyte samples of industrial electrolytic cells was measured by the rotary method using the FRS 1600 rheometer («Anton Paar», Austria). The laminar flow region of the melt determined according to the dependence of viscosity on shear rate at a constant temperature was 10–15 s–1 for all the studied samples. The temperature dependence of cryolite-alumina melt viscosity was measured at a shear rate of 12 ± 1 s–1 in the temperature range from liquidus to 1020 °C. It was shown that the change in the viscosity of all samples in the investigated temperature range (50–80 °С) can be described by a linear equation. The average temperature coefficient of linear equations describing the viscosity of cryolite-alumina electrolytes prepared in laboratory conditions was 0.005 mPа· s/°С, which is 2 times less compared to industrial cell electrolytes. Thus, the change in the viscosity of industrial cell electrolytes with increasing temperature is more significant. Both alumina and calcium fluoride additives increase the cryolite melt viscosity. The viscosity of samples prepared with the conventional composition NaF–AlF3–5%CaF2–4%Al2O3 (CR = 2.3) is equal to 3.11 ± 0.04 mPа· s at an electrolysis operating temperature of 960 °C, while the viscosity of industrial cell electrolytes with the same cryolite ratio is 10–15 % higher and falls in the range of 3.0–3.7 mPа· s depending on the electrolyte composition.

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