Evolution of the Thermo-Mechanical Properties of Ramming Paste from Ambient to Operating Temperature in a Hall-Heroult Cell

Tremblay, Stephane; St-Georges, Lyne; Kiss, László I.; Hacini, Lyès; Allard, Bruno; Marceau, Daniel

doi:10.1007/978-3-319-65136-1_207

Cited by 3 publications

(1 citation statement)

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“…Accordingly, some relevant anode physical properties such as electrical resistivity, porosity, and mechanical properties are closely related to the green anode quality. The ramming paste is used as a joint between cathodes and as a peripheral seam in the cell; it ensures the pot tightness and absorbs thermal expansion of cathode blocks [ 9 , 10 ]. It consists of carbon aggregates, coal tar pitch, and softeners that allow a forming process at room temperature, and it is rammed layer by layer.…”

Section: Introductionmentioning

confidence: 99%

Compaction of Cohesive Granular Material: Application to Carbon Paste

Kansoun

Chaouki

Picard³

et al. 2021

Materials

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Carbon-like materials such as the anode and the ramming paste play a crucial role in the efficiency of the Hall–Héroult process. The mechanical behavior of these materials during forming processes is complex and still ill-understood. This work aimed to investigate experimentally the mechanical behavior of a carbon paste used in the aluminum industry under different loading conditions. For this purpose, experiments consisting of (1) relaxation tests at different compaction levels, (2) quasi-static cyclic tests at several amplitudes, (3) monotonic compaction tests at varied strain rates, and (4) vibrocompaction tests at different frequencies were carried out. The obtained results highlight some fundamental aspects of the carbon paste behavior such as the strain rate’s effect on the paste compressibility, the hardening-softening behavior under cyclic loadings, the effect of cycling amplitude on the stress state and the paste densification, and the frequency effect on the vibrocompaction process. These results pave the way for the development of reliable rheological models for the modeling and the numerical simulation of carbon pastes forming processes.

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Section: Introductionmentioning

confidence: 99%