Saint Petersburg, Russia
Saint Petersburg, Russia

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Perestoronin A.V.,Saint Petersburg State University | Ronkin V.M.,Mashprom Scientific and Production Enterprise | Panov A.V.,RUSAL ITTs Company | Fedyaev A.N.,RUSAL ITTs Company
Metallurgist | Year: 2015

Sodium carbonate crystallization is studied on an industrial test scale with supply of condensed soda pulp into the production vessel of an evaporator battery, and the effect of soda pulp supply conditions on an increase in the period between washings is determined. The size of soda crystals is compared with different Na2CO3 solid phase concentration in evaporated pulp, and evaporation battery operating parameters are determined. Further areas for changing the equipment and production scheme for alumina manufacture with the use of a soda seed in all evaporator batteries are determined. © 2015 Springer Science+Business Media New York.

Bazhin V.Yu.,Saint Petersburg State University | Sizyakov V.M.,Saint Petersburg State University | Vlasov A.A.,Saint Petersburg State University | Vinogradov A.M.,RUSAL ITTs Company | And 2 more authors.
Metallurgist | Year: 2012

Electrolyte component concentration fields are determined for high-power aluminum electrolyzers OA-300 M1 and PA-300. Dependences are found for the change in chemical composition in the column of an electrolyte feeder channel for electrolyzer OA-300 M1. © 2012 Springer Science+Business Media, Inc.

Raab G.I.,Ufa State Aviation Technical University | Fakhretdinova E.I.,Ufa State Aviation Technical University | Valiev R.Z.,Ufa State Aviation Technical University | Trifonenkov L.P.,Rusal ITTs Company | Frolov V.F.,Rusal ITTs Company
Metallurgist | Year: 2016

Results are presented from a computer study of a promising method of high-rate plastic deformation – Multi-ECAP-Conform (M-ECAP-C) – for obtaining long ultrafine-grained semifinished products (wire rods) of aluminum alloy EN-AW 6101 in a single pressing cycle. It is shown that the distribution of cumulative strain in a semifinished product can be controlled by changing the geometry of the tool. The study examined three geometric variants for the outlet section of the pressing channel and used the results to develop an efficient new channel geometry for pressing by the M-ECAP-C method. The new channel shape makes the strain state of semifinished products more uniform during the stage of stable flow of the material, lowers the pressing forces, and reduces the tensile stresses in the deformation zone. © 2016 Springer Science+Business Media New York

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