The concept of modern ecosystem for the Ural Aluminium Smelter

Piirainen, V. Yu.; Mikhaylov, A. V.; Barinkova, A. A.

doi:10.17580/tsm.2022.07.04

tsm

2022

DOI: 10.17580/tsm.2022.07.04

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The concept of modern ecosystem for the Ural Aluminium Smelter

V. Yu. Piirainen¹,

A. V. Mikhaylov²,

A. A. Barinkova³

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“…-collective use of red mud components in metallurgy of ferrous metals, production of portland cement, geopolymers, composite and other materials [7,8,[16][17][18][19][20][21][22][23][24][25][26][27][28];…”

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Principles of rational processing of red mud with the use of carboxylic acids

Kozyrev¹,

Sizyakov²,

Arsentyev³

2022

nfm

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Due to the known limitations of economic nature, the global production complex continues to focus on the most accessible technologies of alumina production, leading to the accumulation of solid waste (red mud), which has created the well-known problem of their processing, and its scale and importance continue to grow in connection with the steady increase in the world volume of aluminum production and consumption. The priority of rational use of natural resources allows us to speak about the preference of principles of deep and waste-free processing of mineral raw materials, which are fully applicable to the processing of red mud, as accumulated raw materials of technogenic origin. At the same time, the key point of this approach becomes the hierarchical division of components into groups of technological products, taking into account the processes that ensure this selective-group division. In this regard, the use of carboxylic acids is of notable interest, as they have a known selectivity to the main components of red mud, which allows to separate low-soluble components (iron and silicon compounds) from light and rare-earth metals with minimum consumption rates. An experimental study has shown that flow-through leaching of thermochemically prepared red mud using formic acid provides high and acceptable recoveries of sodium, calcium, scandium, and rare earth metals. This makes it affordable to use the cheapest method of apparatus-free leaching when implementing this approach on an industrial scale. Experimentally determined the differences in the sequence of elution of sodium, calcium, aluminum and rare-earth metals formates during flow leaching, which creates favorable conditions for concentrating components and separate processing of sampled solutions. The regime parameters of the process that provides complete precipitation of aluminum, scandium and rare earth metals during the neutralization of formate solution with milk of lime, resulting in the necessary prerequisites for further concentration of rare earth metals to obtain technologically significant product are determined.

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confidence: 99%

Principles of rational processing of red mud with the use of carboxylic acids

Kozyrev¹,

Sizyakov²,

Arsentyev³

2022

nfm

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Alumina production: Historical development, issues, and solutions. Part 1

Brichkin,

Vasiliev,

Maksimova

2023

jour

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This study focuses on documenting the historical stages of aluminium and alumina production prior to the transition to a modern industry structure, involving the Hall-Héroult electrometallurgical process, and their technical signiﬁcance for the contemporary metallurgical complex. It highlights the signiﬁcance of these stages in the development of scientiﬁc knowledge related to alumina, aluminium, and their production technology when using chemical methods for obtaining metallic aluminium. The analysis includes aspects, such as classiﬁcation, technical evaluation of the processes, and the raw material base. It is shown that the formation of scientiﬁc knowledge regarding alumina and aluminium is mainly associated with the practical need for using alum and, to some extent, clay minerals. Since the commencement of deliberate research into methods for aluminium production in its elemental state and virtually until the 1890s, aluminium was primarily produced using the metallothermal methods pioneered by Henri St. Clair Deville and his colleagues due to the high thermodynamic stability of aluminium compounds and the absence of affordable energy sources. It was found that from 1854 to 1890, the production of aluminium by chemical method was associated with the use of sodium aluminium chloride (NaCl·AlCl3), natural cryolite, or synthesised ﬂuoride salts. Available technical reagents (aluminium sulphate, ammonia alum, and aluminium hydroxide), along with natural raw materials (cryolite, bauxite, and clay), were used as source materials in this period. The extraction and processing of bauxite were primarily associated with the production of alum and aluminium sulphate consumed by light industry. Although the demand for pure aluminium oxide was limited during the metallothermic production of aluminium, the driving force behind the advancement of modern technologies for alumina production was the demand for chemical products. This demand led to the development of technology for processing bauxite, which forms the foundation of the metallurgical complex in aluminium production using the Hall-Héroult electrometallurgical method.

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The concept of modern ecosystem for the Ural Aluminium Smelter

Cited by 2 publications

References 0 publications

Principles of rational processing of red mud with the use of carboxylic acids

Principles of rational processing of red mud with the use of carboxylic acids

Alumina production: Historical development, issues, and solutions. Part 1

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