Modernization prospects for the bus arrangement of electrolyzer S-8BM (S-8B) (С-8БМ (С-8Б))

Pingin, Vitaliy; Tretyakov, Ya. A.; Radionov, Eugeniy; Nemchinova, N. V.

doi:10.17580/tsm.2016.03.06

Cited by 7 publications

(7 citation statements)

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“…3 for the results. H2SO4 was found to release this element at a higher rate; for instance, in the timeframe from 30 minutes to 60 minutes, the extraction rate rose by 53.8% from 0.7 g/dm 3 to 1.3 g/dm 3 . In case of alkaline recycling, Fconcentration in the liquor reached 1.0 g/dm 3 during the 40th minute of leaching and did not change since.…”

Section: Resultsmentioning

confidence: 98%

“…Primary aluminum is still mainly produced by electrolysis of cryolite-alumina melts [1]. Electrolytic production around the world progresses towards a having a better process in place, expanding and diversifying the sourcing of raw materials, making proposals on tackling environmental issues, and developing novel aluminumbased products [2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Choosing the Reagent to Leach Fluorine from Spent Pot Lining of Aluminum Electrolysis Cells

Nemchinova

Баранов

Бараускас

2022

MSF

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The production of aluminum by electrolysis of cryolite-alumina melts is associated with generation of process waste including gas cleaning sludge, electric filter dust, coal flotation tailings, and spent pot lining (SPL). Most of this waste is then stored in sludge fields, deteriorating the environment near aluminum works. 30 to 50 kg of spent pot lining is produced per ton of Al. The authors’ research was dedicated to finding the best reagent for solvent extraction of valuable components (fluorine in particular) in the process of SPL hydrometallurgy. To that end, the research team sampled carbon parts of lining at the RUSAL Bratsk facility in Shelekhov, Irkutsk Oblast. The following reagents were tested: 2 wt.% solutions of sulfuric acid and sodium hydroxide. Leaching lasted 60 minutes in each experiment. 2% H2SO4 solution was found to release fluorine at a higher rate. However, the resulting liquors contained sulfates, which might negatively affect the service life of equipment; for this reason, 2% NaOH solution was chosen for further leaching of fluorine from spent carbon parts of lining.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Choosing the Reagent to Leach Fluorine from Spent Pot Lining of Aluminum Electrolysis Cells

Nemchinova

Баранов

Бараускас

2022

MSF

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“…The cluster materials appreciably change the process of galvanic deposition of metals, which changes the structure of the protective coating. As a result, the adhesion of chrome with basis improves and completely reproduction of microrelief of the coated surface is reached, which significantly increases the ultimate strain of shift and normal breakoff of galvanic coating from basis [4][5][6][7][8][9][10][11][12][13].…”

Section: Methodsmentioning

confidence: 99%

Composite Chrome Coatings in Aluminum Production

Баранов

2022

MSF

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“…The aluminum electrolysis is an advanced field of non-ferrous metallurgy; therefore, improving processes, finding ways to solve environmental issues, expanding the raw material base, and obtaining new aluminum-based products are relevant [1][2][3][4][5][6][7][8]. The electrolysis of cryolite-alumina melts [9] remains the only industrial technique to produce aluminum, the production volumes of which top those of other non-ferrous metals worldwide.…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Processing of Spent Carbon Lining to Extract Valuable Components for Cryolite Production

Nemchinova

2021

SSP

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The technique of mathematical modeling using the Selector software package has been applied to study the leaching of fluorine from the carbon part of the aluminum electrolysis cell spent lining. Based on the model obtained, the effects of the solvent (caustic soda Na2Oку) concentration and the ratio of liquid and solid phases in the pulp on the fluorine extraction have been assessed. The research object was the lining samples by the RUSAL Krasnoyarsk JSC. A thermodynamic assessment of the spent carbon lining components behavior during the alkaline processing has been performed with the introduction of three solvent concentrations into the model: 12.5, 17.5, and 25.0 g/dm3. According to the model solutions, the maximum fluorine extraction (up to 90 %) is achieved when using a reagent with the Na2Oку concentrations of 12.5 and 17.5 g/dm3 and a liquid to solid ratio of 8.5÷10:1. Using the model, the phase composition of the cake and the forms, in which fluorine remains in the solid residue (cake), have been determined. Laboratory studies confirm the convergence of the simulation results with the experimental data: solutions have been obtained to crystallize out cryolite (with fluorine and silica content of 50–53 % wt. and 0.11÷0.53 % wt., respectively), which is in demand in the electrolysis of cryolite-alumina melts.

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Modernization prospects for the bus arrangement of electrolyzer S-8BM (S-8B) (С-8БМ (С-8Б))

Cited by 7 publications

References 0 publications

Choosing the Reagent to Leach Fluorine from Spent Pot Lining of Aluminum Electrolysis Cells

Choosing the Reagent to Leach Fluorine from Spent Pot Lining of Aluminum Electrolysis Cells

Composite Chrome Coatings in Aluminum Production

Hydrometallurgical Processing of Spent Carbon Lining to Extract Valuable Components for Cryolite Production

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