Use of Leaching Cake from Refractory Lining of Dismantled Electrolysers in Cement Production

DOI

10.2991/isees-19.2019.91How to use a DOI?

Keywords

aluminium production; electrolyser; cathode lining; spent firebrick lining; leaching cake; cement clinker.

Abstract

A hydrometallurgical technology has been proposed for processing the refractory part of the lining of aluminum production electrolysers dismantled and disabled for overhaul. Fluorine-containing compounds are transferred to the solution, which allows obtaining cryolite for being used in the electrolysis process. It is recommended to use solid residue from leaching (cake) with a minimum content of alkalis and fluorine as an additive to the mixture for cement production. According to the results of experiments on obtaining portland cement by traditional firing technology, the limiting content of alkali metal oxides (not higher than 4.5% by weight, calculated as Na2O) in the leaching cake was determined, the optimum content of this additive in the charge is from 5 to 12% depending on chemical composition of lime used.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - A.A. Petrovskiy
AU  - N.V. Nemchinova
AU  - A.A. Tyutrin
AU  - N.A. Korepina
PY  - 2019/08
DA  - 2019/08
TI  - Use of Leaching Cake from Refractory Lining of Dismantled Electrolysers in Cement Production
BT  - Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019)
PB  - Atlantis Press
SP  - 358
EP  - 363
SN  - 2590-3217
UR  - https://doi.org/10.2991/isees-19.2019.91
DO  - 10.2991/isees-19.2019.91
ID  - Petrovskiy2019/08
ER  -