Investigation of substantial composition of alumina-bearing material of aluminium electrolysers for usage in primary aluminium technology

Бурдонов, А. Е.; Zelinskaya, E. V.; Gavrilenko, L. V.; Gavrilenko, A. A.

doi:10.17580/tsm.2018.03.05

Cited by 14 publications

(10 citation statements)

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“…To select the optimal scheme for processing the estimate, it was necessary to study the phasechemical and particle size distribution, and other characteristics of the raw material. Detailed research results are presented in [8,11].…”

Section: Formulation Of the Problemmentioning

confidence: 99%

“…In addition, there is no waste of flotation processing of removable coal foam (flotation tailings) and solutions of "wet" gas purification (gas purification sludge). And also significantly reduces the amount of this type of waste generated (the type of use of automatic feed of raw materials and fluorine salts), as a mechanical mixture of alumina and recycled (secondary) electrolyte, called "estimates" or "estimates", which wakes up to "zero" marks of electrolysis cases when loading in baths and subsequently collected by dust collectors (PUM)) [1,8].…”

Section: Introductionmentioning

confidence: 99%

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Features of metallurgy waste mainly processing with account for raw material contrast

Бурдонов¹,

Barakhtenko²,

Prokhorov

et al. 2020

E3S Web Conf.

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This work presents research studies of alumina-containing estimates formed during the production of aluminum on electrolyzers with self-burning anodes during technological operations at PJSC RUSAL Bratsk. Material from the territory of the electrolysis workshop, with a mark of ± 0, is a mixture of finely dispersed powder, 2.5 mm in size (on average 62.78% by weight) with pieces of material from 0.5 to 6 cm in size. , 26% by weight). As a result of the work, the particle size and chemical-metallurgical properties of an alumina-containing estimate were studied. During the research, the content of valuable components and impurities in the sample of various classes was determined. In the process of mineralogical analysis, two phases were identified in the products: dark, black-gray and light, grayish-white. It is proved that these phases have significant differences in the chemical composition of the feed. Spectroscopic studies showed significant differences in the colorimetric characteristics of the raw materials, which is a fundamental factor for the use of photometric separation. Based on preliminary studies on the separation of alumina-containing estimates by photometric separation, the fundamental possibility of purifying contaminated material from technological impurities has been established.

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Section: Formulation Of the Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Features of metallurgy waste mainly processing with account for raw material contrast

Бурдонов¹,

Barakhtenko²,

Prokhorov

et al. 2020

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…However, there are significant differences between them. As a rule, refractory bricks have a density of more than 1 g/cm 3 and, in general, they are more resistant to the effects of melt components. However, they have worse thermal insulation properties than low density materials (0.35-0.8 g/cm 3 ), which have lower rates of chemical and physical resistance.…”

Section: Problem Specificationmentioning

confidence: 99%

“…The main industrial method for introducing primary aluminum is electrolysis of alumina-cryolite melts (Hall-Héroult process) [1,2]. One of the drawbacks of this technology is a large amount of solid technogenic products (coal foam, flotation tailings, alumina strips) formed in the process [3][4][5]. Currently, the main type of solid technogenic raw materials in the production of aluminum is materials for dismantling the cathode device of electrolyzers being waste lining, which is saturated with electrolyte components during the entire service life.…”

Section: Introductionmentioning

confidence: 99%

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

Petrovskiy¹,

Nemchinova²,

Tyutrin³

et al. 2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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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.

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“…Aluminium industry is one of the largest in Russian non-ferrous metallurgy; "RUSAL" activity is aimed at extraction of bauxite, alumina refining, and primary aluminum production, as well as powders and alloys on its basis. Company emploees together with scientists improve electrolysis technologies of alumina-cryolite melts for achieving high technical and economical indexes [2,3], expansion of the raw material base [4,5] and environmental improvement [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Ways of Solving the Ecological Problem of Alluminium Smelting Hard Waste Disposa

Somov¹,

Nemchinova²,

Tyutrin³

2019

Proceedings of the VIII Science and Technology Conference “Contemporary Issues of Geology, Geophysics and Geo-Ecology of the No

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Chemical composition and main physical-chemical characteristics (apparent density, electrical resistivity, thermal conductivity, compression strength) carbon cathode block samples of spent lining for aluminium electrolysis unit produced by OJSC "RUSAL Krasnoyarsk"; it is shown that to increase the bath service life it is necessary to form a crust to decrease alumina-cryolite melts penetration into electrolysis carbon cathode blocks which will reduce environmental impact.

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Investigation of substantial composition of alumina-bearing material of aluminium electrolysers for usage in primary aluminium technology

Cited by 14 publications

References 0 publications

Features of metallurgy waste mainly processing with account for raw material contrast

Features of metallurgy waste mainly processing with account for raw material contrast

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

Ways of Solving the Ecological Problem of Alluminium Smelting Hard Waste Disposa

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