Aluminum Smelting Carbon Dust as a Potential Raw Material for Gallium and Germanium Extraction

Shimanskii, A. F.; Yasinskiy, Andrey; Yakimov, Igor S.; Лосев, В. Н.; Buyko, Olga V.; Malyshkin, Artem; Kazantsev, Yakov

doi:10.1007/s11837-021-04563-8

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…На основе комплексного исследования состава и характеристик УП и УК, форм нахождения в них галлия и германия предложен механизм накопления этих элементов в угольной пене и УК [2], впервые предложен способ сжигания УК, обеспечивающий получение возгонов, обогащённых германием, и золыконцентрата галлия. Сжигание УК проводили в той же установке, в которой сжигали лигнит, с учётом состава и физико-химических характеристик УК.…”

Section: исследование процессов извлечения германия и рзм из лигнитаunclassified

“…Based on a comprehensive study of the composition and characteristics of CD and CC, the forms of gallium and germanium presence in them, a mechanism for the accumulation of these elements in carbon dust and CC was proposed [2]. For the first time, a method for burning CC was proposed, which ensures the production of coal fly ash, enriched with germanium, and It is found that during the combustion of carbon concentrate, gallium accumulates in the ash up to 0.8 wt.…”

Section: Germanium and Gallium Extractingmentioning

confidence: 99%

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Physical and Chemical Regularities of the Complex Processing of Lignite and Carbon-Containing Wastes From Aluminum Production With the Extraction of Rare Elements

Kazantsev,

Shimanskii,

Losev

et al. 2023

XVI INTERNATIONAL CONFERENCE "METALLURGY OF NON-FERROUS, RARE AND NOBLE METALS" Named After Corresponding Member of the RAS Gen

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Rare elements, including rare earth metals (REM), germanium and gallium are widely used in various fields of science and technology. Germanium and gallium are used in the semiconductor industry, and rare-earth metals are used in structural materials for aviation and space, as well as in nuclear energy. The sufficiency with own raw materials is a strategic issue for producers of rare metal raw materials. Despite the vast reserves of rare metal deposits in Russia, they are far from developed infrastructures and are characterized by a complex enrichment technology.

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Section: исследование процессов извлечения германия и рзм из лигнитаunclassified

Section: Germanium and Gallium Extractingmentioning

confidence: 99%

Physical and Chemical Regularities of the Complex Processing of Lignite and Carbon-Containing Wastes From Aluminum Production With the Extraction of Rare Elements

Kazantsev,

Shimanskii,

Losev

et al. 2023

XVI INTERNATIONAL CONFERENCE "METALLURGY OF NON-FERROUS, RARE AND NOBLE METALS" Named After Corresponding Member of the RAS Gen

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“…Параметры, влияющие на расход анодной массы Для расчета потерь с пеной используется параметр P -выход пены на 1 т произведенного алюминия. Пена является продуктом сгорания анода, образующаяся вследствие разной реакционной способности кокса из связующего (пека) и кокса-наполнителя [8]. Кокс из связующего окисляется значительно быстрее, что приводит к осыпанию частиц анода и попаданию их в электролит.…”

Section: методика расчета удельного расхода анодной массыunclassified

“…Q 1 -теоретический минимальный расход углерода на 1 т алюминия с учетом окисления металла и выходом по току 87,63 %. Основная реакция получения алюминия имеет вид [8][9][10] 2Al 2 O 3 + 3C = 4Al + 3CO 2 .…”

Section: анализ методики расчетаunclassified

Anode paste consumption for aluminum production

Drizhenko

Datsyura

Yasinskiy

2022

Izv.VUZ. Tsvet. Met.

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In Russia, most aluminum smelters are equipped with cells with self-baking anodes featuring an urgent problem of lowering the anode paste consumption, since the share of anode materials in the cost of aluminum varies from 8 to 20 %. To solve this problem, it is necessary to determine the anode paste demand. The method for calculating the specific anode paste consumption used at aluminum smelters has a poor accuracy. The paper discusses the main errors of this method, shows the stages of anode paste consumption calculation, assesses the adequacy of calculations and gives recommendations for method improvement. It is shown that in general the considered method adequately reflects carbon consumption processes, but the final result of calculations may differ significantly from the actual one. The values taken constant to simplify the calculation, in fact, may vary during the electrolysis, which leads to a significant change in the final result of calculations. For example, an increase in the CO2 fraction from 0.45 to 0.5 leads to a decrease in the anode paste consumption by 15.3 kg/tonAl. At the same time, it is known that the composition of anode gases changes sharply as the anode effect occurs: the CO2 fraction decreases, and the CO fraction increases. In summer, at high ambient temperatures, the proportion of both vaporized pitch and anodes with an increased surface temperature rise. As the latter changes to 0.25, the consumption increases by 6.6 kg/tonAl. The same applies to air oxidation. The number of depressurized cells may increase with the subsequent increase in the carbon consumption. It is necessary to pay attention to factors affecting the anode quality. Incorrectly selected particle size distribution or worn equipment may significantly degrade the anode quality and lead to an increase in carbon consumption. It is necessary to make adjustments to the calculation in order to consider the peculiarities of carbon monoxide formation properly.

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