Anode Baking Furnace Fluewall Design Evolution: A Return of Experience of Latest Baffleless Technology Implementation

Ghaoui, Yann El; Besson, Sandra; Drouet, Yannick; Morales, François; Tomsett, Alan; Gendre, Magali; Anderson, Nigel Martin; Eich, Bernhard

doi:10.1002/9781119274780.ch158

Cited by 3 publications

(2 citation statements)

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“…They reported results with two designs that have been optimised for the flue-wall and exhaust ramp. Gaoui et al [29] have examined the influence of baffles. The idea was to remove the baffles and simulate using a finite element method.…”

Section: Related Workmentioning

confidence: 99%

Effects of Mesh Generation on Modelling Aluminium Anode Baking Furnaces

Libreros

Trujillo

2021

Fluids

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Anode baking is critical in carbon anode production for aluminium extraction. Operational and geometrical parameters have a direct impact on the performance of anode baking furnaces (ABF), and hence on the resulting anode quality. Gas flow patterns, velocity field, pressure drop, shear stress and turbulent dissipation rate are the main operational parameters to be optimised, considering a specific geometry that is discretised as a mesh. Therefore, this paper aims to establish the need to generate an appropriate mesh to perform accurate numerical simulations of three-dimensional turbulent flow in a single section of an ABF. Two geometries are considered for generating three meshes, using COMSOL and cfMesh, with different refinement zones. The three meshes are used for creating nine incompressible isothermal turbulent flow models, with varying operational parameters. Velocity field, convergence and turbulent viscosity ratio in the outlet of fuel inlet pipes are the quantification criteria. Quantification criteria have shown that a better physical representation is obtained by refining in the whole combustion zone. COMSOL Multiphysics’ built-in mesh generator allows quadrilateral, tetrahedron and hexahedron shapes. Adaptive cell sizes and shapes have a place within modelling, since refining a mesh in appropriate zones brings the Peclet number down when the incompressible isothermal turbulent flow is simulated.

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Section: Related Workmentioning

confidence: 99%

Effects of Mesh Generation on Modelling Aluminium Anode Baking Furnaces

Libreros

Trujillo

2021

Fluids

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“…31 Tajik et al 32 studied the effects of two different geometric wall designs on the flow field, and found that it was beneficial for energy saving to close the top of the first baffle plate and make the airflow distribution more even. Ghaoui et al 33 designed the baffleless flue wall in the ABF which resulted in higher thermal efficiency and better baking homogeneity. Zhou et al 34 studied the effects of the bricks arrangements and baffles on the flue flow characteristics of ABF.…”

Section: Low Efficiency and High Energy Consumption During The Bakimentioning

confidence: 99%

Structural and thermal analysis of an innovative baking furnace for carbon anode production

2020

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The urgent demands for the high efficiency and low consumption of carbon anode baking process stimulate the structure optimization of the baking furnace. In this paper, a closed-top innovative anode baking furnace (CTABF) with periodically arranged burners and anode crucibles is proposed, and the thermal process in the CTABF is studied via a coupled multi-physics model and the in situ measurement. Results show that the multi-channel design changes the one-way high-temperature flue gas path and increases its residence time in the furnace, while the temperature distributions in the inner and outer crucibles show good uniformity. The average convective heat flux accounts for about 68% of the total heat flux around the crucible surface, and thus the baking rate of anodes can be controlled by adjusting the power of driven fan. Therefore, due to the above structural retrofits, the baking time and energy consumption are reduced and the baking quality is improved, showing the superiority of the proposed CTABF over the traditional ABF.

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