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- Article name
- Hardening technology materials and recycling waste linings of electrolysis in aluminium production
- Authors
- GOLOVNYH N. V., , golovnykh@igc.irk.ru, Institute of Geochemistry named after A. P. Vinogradov SB RAS, Irkutsk, Russia
- Keywords
- liner / the barrier layer / injection / waste / charge / alumina / cryolite / sludge / carbonization
- Year
- 2010 Issue 4 Pages 47 - 52
- Code EDN
- Code DOI
- Abstract
- To improve the original mineral structure of the refractories used in the electrolysis, the method of injection of particles containing the ions Li+ and B3+, the size of which is comparable to the size of the crystal lattice, which improves the chemical stability and implement the silting of the barrier layer. Pre-modification technology materials hinders the penetration of the ions Na+, intraphase prevents delamination of the barrier layer and creates a solid physical and chemical protection of the inner layers of the lining. The process of refining the initial waste lining of aluminum electrolyzers is a closed production cycle without waste receiving valuable for aluminum electrolysis products - alumina and cryolite, and the full utilization of secondary wastes (components - C, Ca2SiO4, CaF2) - climb in cement production. Released from thermochemical processing of carbon dioxide is absorbed by the system of wet gas scrubbing, and fully used in the carbonization of aluminate-fluoride solutions.
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