Open AccessThe application features of the modified graphitized carbon lining materials in the alumina electrolysis cell
Author(s) -
А. В. Саитов,
V. Yu. Bazhin
Publication year - 2018
Publication title -
novye ogneupory
Language(s) - English
Resource type - Journals
ISSN - 1683-4518
DOI - 10.17073/1683-4518-2018-5-56-65
Subject(s) - electrolysis , materials science , lithium (medication) , diffusion , sodium , carbon fibers , cryolite , penetration (warfare) , cathode , chemical engineering , chemistry , composite material , thermodynamics , aluminium , metallurgy , electrode , medicine , physics , operations research , composite number , engineering , electrolyte , endocrinology
It was studied how Sodium penetrates inside the samples of the Lithium-modified graphitized carbon material (GCM). The Sodium diffusion coefficients were defined after the GCM's treatment by the Lithium vapor and the diffusion activation energy was calculated for different conditions. The obtained kinetic dependencies allowed to establish the mechanism of Sodium diffusion into the modified GCM. It was shown to be reasonable to expose the GCM's samples to the preliminary treatment by the Lithium vapor which prevents the destruction of the alumina electrolysis cells' cathode surface's lining layers and thus increases its service life. As the tested GCM's samples demonstrated, the possibility was achieved to develop the protection technology of the bottom surface of the Sodium penetration in course of the electrolysis in the alumina-cryolite melts.