Compaction of Cohesive Granular Material: Application to Carbon Paste

Materials

Julien Lauzon-Gauthier¹  Mario Fafard²  Hicham Chaouki²  Zahraa Kansoun²  Houshang Alamdari³  Donald Picard⁴ 

[1] Alcoa Corporation, Continuous Improvement Smelting Technology, 1 Boul. Des Sources, Deschambault-Grondines QC G0A 1S0, Canada;Department of Civil and Water Engineering, NSERC/Alcoa Industrial Research Chair MACE3 and Aluminium Research Centre—REGAL, 1065 Avenue de la Medecine, Laval University, Québec, QC G1V 0A6, Canada;Department of Mining, Metallurgical and Materials Engineering, NSERC/Alcoa Industrial Research Chair MACE3 and Aluminium Research Centre—REGAL, 1065 Avenue de la Medecine, Laval University, Québec, QC G1V 0A6, Canada;Eddify Technologies Company, 3425 Rue Pierre-Ardouin, Québec, QC G1P 0B3, Canada;

关键词: carbon paste;    compaction;    quasi-static behavior;    dynamic behavior;    cyclic behavior;   

DOI  :  10.3390/ma14040704

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown