Research and development of a nanoinoculated cast iron composition for aluminum electrolyser anode stubs

Kondratiev, V. V.; Mekhnin, A. O.; Иванов, Н. А.; Bogdanov, Yu. V.; Ershov, V. A.

doi:10.1007/s11015-012-9536-5

Cited by 4 publications

(6 citation statements)

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Section: Materials Scienceunclassified

“…Отходы собираются в виде влажных или сухих порошков [1][2][3][4][5][6][7]. По оценкам [1,2,6,7] при производстве металлического кремния ежегодно образуется более 100 000 тонн отходов [7]. Несмотря на значительные усилия по снижению их вредного воздействия на окружающую среду, не существует возможности предотвратить загрязнение почвы и подземных вод.…”

Section: Materials Scienceunclassified

“…Несмотря на значительные усилия по снижению их вредного воздействия на окружающую среду, не существует возможности предотвратить загрязнение почвы и подземных вод. В настоящее время в РФ проводятся работы по использованию промышленных отходов в качестве модифицирующих добавок в различных отраслях, например в строительстве [4][5][6] и металлургии [1,2,7].…”

Section: Materials Scienceunclassified

“…Во всех технологических процессах изготовления металлического кремния происходят потери материала разной степени и качества. В России на заводах по производству кремния в отвалах осталось значительное количество не переработанных металлургических шлаков [1,2]. Для хранения этих твердых отходов требуются многие квадратные километры земли.…”

Section: Introductionunclassified

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Study of the effect of a combined modifier from silicon production waste on the properties of gray cast iron

Karlina,

Kondratiev,

Sysoev

et al. 2024

Metal Working and Material Science

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Introduction. During the metallurgical production of silicon, waste is generated that accumulates in dumps, causing harm to the environment. Disposal and recycling of solid waste from silicon production is especially important because They contain important chemical compounds (silicon dioxide, silicon carbide, carbon nanotubes) that can be used in other industries, which will bring greater economic value. Considering the possibilities for extracting these useful components from silicon production waste, it is necessary to bring processing technologies to the stage of widespread practical application. Therefore, the development of a special waste processing technology to obtain a useful product in the form of a composition of silicon dioxide and silicon carbide remains an urgent problem. Purpose of the work: to study the formation of the morphological form of graphite with the introduction of nano-modifiers from silicon production waste. The work examined samples of gray cast iron after modification with a combined modifier obtained from silicon production waste. The research methods are mechanical tests for statistical tension, analysis of the chemical composition and metallographic studies. Results and discussion. It was revealed that the mechanical properties of gray cast iron increased by 30-50% after modification with a combined modifier, compared with witness samples. The morphology of graphite is an important parameter affecting the properties of cast iron. It has been established that during the modification process the morphology of graphite changes from lamellar to vermicular. Specimens of gray cast iron with vermicular form of graphite have high strength values compared to specimens of gray cast iron with lamellar form of graphite. The presented results confirm the promise of the developed approach aimed at obtaining new classes of modifiers and products made of gray cast iron with a high range of mechanical properties.

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Section: Materials Scienceunclassified

Section: Introductionunclassified

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Study of the effect of a combined modifier from silicon production waste on the properties of gray cast iron

Karlina,

Kondratiev,

Sysoev

et al. 2024

Metal Working and Material Science

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“…Apart from phosphorus, cast iron production and operating properties are affected by other iron components. In some work, in order to improve cast iron properties, it is recommended to increase the carbon content to 3.4-3.6% [6] and, in order to increase strength and corrosion resistance, to accomplish its modifi cation with carbon nanotubes [7], including together with nano-granules of silicon dioxide or silicon carbide [8]. In order to reduce shrinkage and increase cast iron electrical conductivity, it is suggested to introduce in addition a small amount of alloying elements, i.e., Si, Cu, Al, entering into the composition of reprocessed high purity electrically produced aluminum waste [9].…”

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Effect of Cast Iron Structure and Properties on Contact Quality with an Aluminum Electrolyzer Carbon Anode

et al. 2017

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Physicomechanical and casting properties are studied for high-phosphorus irons used in the assembly of aluminum electrolyzer baked anodes in RUSAL enterprises compared with gray cast iron containing a minimum amount of phosphorus and sulfur. It is shown that iron primary crystallization under conditions approaching pouring production parameters and iron cooling in the nipple -cast iron -carbon anode contact assembly proceeds with signifi cant supercooling that causes the formation of a pearlite matrix in the cast iron structure with increased hardness. Iron with a lower carbon equivalent exhibiting high hardness has a better elasticity modulus and strength values. The presence of ternary phosphide eutectic within the iron structure with a high phosphorus content reduces the breaking strength considerably at high anode operating temperatures and this may be a reason for cast iron loss of strength and anode separation at the end of an operating cycle leading the electrolyzer stoppage. Iron with the minimum phosphorus content exhibits strength exceeding by more than a factor of two that of high-phosphorus cast iron and also the least electrical resistance in the range up to 500-600°C. In addition, iron with a high phosphorus content has an anomalous change in linear thermal expansion coeffi cient (LTEC) in the range 600-810°C that may also lead to degradation of "soft" metal (anode at the end of an operating cycle). The results obtained are explained drawing on thermal analysis data and metallographic studies.

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Making up Model for Forced Cathode Cooling of Casing Powerful Aluminum Electrolyzer with Prebaked Anodes

Sysoev

2021

Lecture Notes in Mechanical Engineering

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Research and development of a nanoinoculated cast iron composition for aluminum electrolyser anode stubs

Cited by 4 publications

References 0 publications

Study of the effect of a combined modifier from silicon production waste on the properties of gray cast iron

Study of the effect of a combined modifier from silicon production waste on the properties of gray cast iron

Effect of Cast Iron Structure and Properties on Contact Quality with an Aluminum Electrolyzer Carbon Anode

Making up Model for Forced Cathode Cooling of Casing Powerful Aluminum Electrolyzer with Prebaked Anodes

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