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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ipolytech</journal-id><journal-title-group><journal-title xml:lang="ru">iPolytech Journal</journal-title><trans-title-group xml:lang="en"><trans-title>iPolytech Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-4004</issn><issn pub-type="epub">2782-6341</issn><publisher><publisher-name>Irkutsk National Research Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/1814-3520-2024-4-635-646</article-id><article-id custom-type="edn" pub-id-type="custom">BPMVPW</article-id><article-id custom-type="elpub" pub-id-type="custom">ipolytech-891</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕТАЛЛУРГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METALLURGY</subject></subj-group></article-categories><title-group><article-title>Разработка методики постановки высокоамперного электролизёра на электрический обжиг с использованием плавких вставок</article-title><trans-title-group xml:lang="en"><trans-title>Development of a technology for setting a high-amperage electrolytic cell for electrical preheating using fusible links</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Радионов</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Radionov</surname><given-names>E. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Радионов Евгений Юрьевич, к.т.н., заместитель директора департамента по разработке ошиновки и измерениям</p><p>660111, г. Красноярск, ул. Пограничников, 37/1</p></bio><bio xml:lang="en"><p>Evgeniy Yu. Radionov, Cand. Sci. (Eng.), Deputy Director of the Department for Busbar and Measurement Development</p><p>37/1, Pogranichnikov St., Krasnoyarsk 660111</p></bio><email xlink:type="simple">evgeniy.radionov@rusal.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>RUSAL Engineering and Technology Center LLC</institution><country>Россия</country></aff><aff xml:lang="en"><institution>RUSAL Engineering and Technology Center LLC</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>04</day><month>01</month><year>2025</year></pub-date><volume>28</volume><issue>4</issue><fpage>634</fpage><lpage>646</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Радионов Е.Ю., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Радионов Е.Ю.</copyright-holder><copyright-holder xml:lang="en">Radionov E.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://ipolytech.elpub.ru/jour/article/view/891">https://ipolytech.elpub.ru/jour/article/view/891</self-uri><abstract><p>Цель – разработка и апробация методики расчета подключения электролизера на электрический обжиг без отключения тока серии корпусов электролиза с использованием алюминиевых плавких вставок. Для расчетов сложной электрической цепи был использован метод преобразования электрической цепи, непосредственного применения законов Кирхгофа. Выявление и расчеты полученных закономерностей проводились с помощью графических и аналитических методов. Математическое моделирование проводилось с помощью апробированных компьютерных программ. Разработана методика расчета подключения электролизера на электрический обжиг без отключения тока серии корпусов электролиза. Выполнены расчеты (математическое моделирование) для двух вариантов пуска электролизера: без снятия токовой нагрузки на серии корпусов электролиза и с частичным занижением токовой нагрузки на серии до 250 кА. В корпусах электролиза были выполнены опытные испытания пуска двух высокоамперных электролизеров без отключения тока серии корпусов электролиза, т.е. при рабочем токе 330 кА, и пуск одного электролизера с занижением токовой нагрузки до 250 кА. Полученные в ходе проведенных исследований результаты свидетельствуют о том, что разработанный способ позволяет выполнять постановку высокоамперного электролизера на электрический обжиг с использованием плавких вставок без снятия токовой нагрузки на серии корпусов электролиза, либо с частичным ее занижением. Успешные опытные испытания трех высокоамперных электролизеров, работающих на силе тока 330 кА, дают возможность произвести тиражирование (распространение) данного способа обжига на другие высокоамперные электролизеры, работающие на силе тока 400, 550 кА.</p></abstract><trans-abstract xml:lang="en"><p>The paper aims to develop and test a design procedure for setting an electrolytic cell for electrical preheating without current interruption in a series of electrolysis units using aluminum fusible links. For the analysis of a complex electrical circuit, the circuit conversion technique, a direct application of Kirchhoff’s circuit laws, was used. The obtained patterns were identified and determined using graphical and analytical methods. Mathematical modeling was performed by means of approved programs. A design procedure was developed for setting an electrolytic cell for electrical preheating without current interruption in the series of electrolysis units. The computations (mathematical modeling) were performed for two startup variants: without current load interruption in the series of electrolysis units and with the lowering of current load in the series (to 250 kA). Pilot startup tests of two high-amperage electrolytic cells were performed without current interruption in the series of electrolysis units, i.e., at an operating current of 330 kA, as well as the startup of one electrolytic cell with the current load lowered to 250 kA. The study results indicate that the developed method allows a high-amperage electrolytic cell to be set for electrical preheating with the use of fusible links without interrupting the current load or with its lowering in the series of electrolysis units. Successful pilot tests of three high-amperage electrolytic cells operating at a current strength of 330 kA provide a means to extrapolate this preheating method to other high-amperage electrolytic cells operating at current strengths of 400 and 550 kA.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>производство алюминия</kwd><kwd>пуск электролизера</kwd><kwd>электрический обжиг</kwd><kwd>плавкие вставки</kwd><kwd>ошиновка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>aluminum production</kwd><kwd>electrolytic cell start-up</kwd><kwd>electric firing</kwd><kwd>fusing links</kwd><kwd>busbar</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Grjotheim K., Kvande H. Introduction to aluminium electrolysis. Düsseldorf: Aluminium-Verlag, 1993. 260 p.</mixed-citation><mixed-citation xml:lang="en">Grjotheim K., Kvande H. Introduction to aluminium electrolysis. Düsseldorf: Aluminium-Verlag; 1993, 260 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Dudin M.N., Voykova N.A., Frolova E.E., Artemieva J.A., Rusakova E.P., Abashidze A.H. Modern trends and challenges of development of global aluminum industry // Metalurgija. 2017. Vol. 56. No. 1-2. P. 255–258.</mixed-citation><mixed-citation xml:lang="en">Dudin M.N., Voykova N.A., Frolova E.E., Artemieva J.A., Rusakova E.P., Abashidze A.H. Modern trends and challenges of development of global aluminum industry. Metalurgija. 2017;56(1-2):255-258.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Blais M., Désilets M., Lacroix M. Energy savings in aluminum electrolysis cells: effect of the cathode design // The Minerals, Metals &amp; Materials Series / eds. В.А. Sadler. Сham: Springer, 2013. P. 627–631. https://doi.org/10.1002/9781118663189.ch107.</mixed-citation><mixed-citation xml:lang="en">Blais M., Désilets M., Lacroix M. Energy savings in aluminum electrolysis cells: effect of the cathode design. In: Sadler В.А. (eds.). The Minerals, Metals &amp; Materials Series. Сham: Springer; 2013, p. 627-631. https://doi.org/10.1002/9781118663189.ch107.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Loginova I.V. Investigation into the question of complex processing of bauxites of the Srednetimanskoe deposit // Journal of Non-Ferrous Metals. 2013. Vol. 54. No. 2. P. 143–147. https://doi.org/10.3103/S1067821213020089. EDN: RFAJAX.</mixed-citation><mixed-citation xml:lang="en">Loginova I.V. Investigation into the question of complex processing of bauxites of the Srednetimanskoe deposit. Journal of Non-Ferrous Metals. 2013;54(2):143-147. https://doi.org/10.3103/S1067821213020089. EDN: RFAJAX.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Shoppert A., Valeev D., Loginova I. Novel method of bauxite treatment using electroreductive Bayer process // Metals. 2023. Vol. 13. Iss. 9. Р. 1502. https://doi.org/10.3390/met13091502.</mixed-citation><mixed-citation xml:lang="en">Shoppert A., Valeev D., Loginova I. Novel method of bauxite treatment using electroreductive Bayer process. Metals. 2023;13(9):1502. https://doi.org/10.3390/met13091502.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Dubovikov O.A., Brichkin V.N., Ris A.D., Sundurov A.V. Thermochemical activation of hydrated aluminosilicates and its importance for alumina production // Non-ferrous Metals. 2018. No. 2. Р. 11–16. https://doi.org/10.17580/nfm.2018.02.02. EDN: VAYILV.</mixed-citation><mixed-citation xml:lang="en">Dubovikov O.A., Brichkin V.N., Ris A.D., Sundurov A.V. Thermochemical activation of hydrated aluminosilicates and its importance for alumina production. Non-ferrous Metals. 2018;2:11-16. https://doi.org/10.17580/nfm.2018.02.02. EDN: VAYILV.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Aleksandrov A.V., Aleksandrov V.V. Improving the quality of alumina-containing sinter using water-cooled furnace shell // Science of Sintering. 2012. Vol. 44. Iss. 3. Р. 281–286. https://doi.org/10.2298/SOS1203281A.</mixed-citation><mixed-citation xml:lang="en">Aleksandrov A.V., Aleksandrov V.V. Improving the quality of alumina-containing sinter using water-cooled furnace shell. Science of Sintering. 2012;44(3):281-286. https://doi.org/10.2298/SOS1203281A.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Зенкин Е.Ю., Гавриленко А.А., Немчинова Н.В. О переработке отходов производства первичного алюминия ОАО «РУСАЛ Братск» // Вестник Иркутского государственного технического университета. 2017. Т. 21. № 3. С. 123–132. https://doi.org/10.21285/1814-3520-2017-3-123-132.</mixed-citation><mixed-citation xml:lang="en">Zenkin E.Yu., Gavrilenko A.A., Nemchinova N.V. On RUSAL Bratsk JSC primary aluminum production waste recycling. Proceedings of Irkutsk State Technical University. 2017;21(3):123-132. (In Russ.). https://doi.org/10.21285/1814-3520-2017-3-123-132.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Сторожев Ю., Поляков П., Дектерев А., Казанцев Я. К вопросу очистки анодных газов электролизера с анодом Содерберга // Экология и промышленность России. 2019. Т. 23. № 11. С. 15–19. https://doi.org/10.18412/1816-0395-2019-11-15-19. EDN: OXKBKT.</mixed-citation><mixed-citation xml:lang="en">Storozhev Yu.I., Polyakov P.V., Dekterev Ar.A., Kazantsev Ya.V. To the question of cleaning anodic gases of the cell with the Soderberg’s anodе. Ecology and Industry of Russia. 2019;23(11):15-19. (In Russ.). https://doi.org/10.18412/1816-0395-2019-11-15-19. EDN: OXKBKT.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao Xia, Ma Lei. Hazardous waste treatment for spent pot liner // Earth and Environmental Science: IOP Conference Series. 2018. Vol. 108. Iss. 4. P. 042023. https://doi.org/1088/1755-1315/108/4/042023.</mixed-citation><mixed-citation xml:lang="en">Zhao Xia, Ma Lei. Hazardous waste treatment for spent pot liner. In: Earth and Environmental Science: IOP Conference Series. 2018;108(4):042023. https://doi.org/1088/1755-1315/108/4/042023.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Бурдонов А.Е., Зелинская Е.В., Гавриленко Л.В., Гавриленко А.А. Изучение вещественного состава глиноземсодержащего материала алюминиевых электролизеров для использования в технологии первичного алюминия // Цветные металлы. 2018. № 3. С. 32–38. https://doi.org/10.17580/tsm.2018.03.05. EDN: YUCHKI.</mixed-citation><mixed-citation xml:lang="en">Burdonov A.E., Zelinskaya E.V., Gavrilenko L.V., Gavrilenko A.A. Investigation of substantial composition of alumina-bearing material of aluminium electrolysers for usage in primary aluminium technology. Tsvetnye metally. 2018;3:32-38. (In Russ.). https://doi.org/10.17580/tsm.2018.03.05. EDN: YUCHKI.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">NemchinovaN.V., Barauskas A.E., Tyutrin A.A., Vologin V.S. Processing finely dispersed technogenic raw materials for aluminum production in order to extract valuable components // Russian Journal of Non-Ferrous Metals. 2021. Vol. 62. Iss. 6. P. 659–667. https://doi.org/10.3103/S1067821221060158. EDN: RHWKMQ.</mixed-citation><mixed-citation xml:lang="en">Nemchinova N.V., Barauskas A.E., Tyutrin A.A., Vologin V.S. Processing finely dispersed technogenic raw materials for aluminum production in order to extract valuable components. Russian Journal of Non-Ferrous Metals. 2021;62(6):659-667. https://doi.org/10.3103/S1067821221060158. EDN: RHWKMQ.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Петровский А.А., Немчинова Н.В., Тютрин А.А., Корепина Н.А. Использование кека выщелачивания от переработки огнеупорной футеровки демонтированных электролизеров в производстве цемента // iPolytech Journal. 2022. Т. 26. № 4. С. 697–708. https://doi.org/10.21285/1814-3520-2022-4-697-708. EDN: EGMMXU.</mixed-citation><mixed-citation xml:lang="en">Petrovskiy A.A., Nemchinova N.V., Tyutrin A.A., Korepina N.A. Use of leaching cake from refractory lining of dismantled electrolysers in cement production. iPolytech Journal. 2022;26(4):697-708. (In Russ.). https://doi.org/10.21285/1814-3520-2022-4-697-708. EDN: EGMMXU.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Пузанов И.И., Волохов И.Н., Быков Р.Ю., Муравьев С.А. Пуск РА-400 на Тайшетском алюминиевом заводе // Цветные металлы и минералы – 2024: сб. тез. докл. XII Междунар. конгресса (г. Красноярск, 9–13 сентября 2024 г.). Красноярск, 2024. С. 213–215.</mixed-citation><mixed-citation xml:lang="en">Puzanov I.I., Volokhov I.N., Bykov R.Yu., Muravyev S.A. Launch of RA-400 at Taishet aluminium smelter. In: Tsvetnye metally i mineraly – 2024: sbornik tezisov dokladov XII Mezhdunarodnogo кongressa = Non-ferrous metals and minerals: book of abstracts. 9–13 September 2024, Krasnoyarsk. Krasnoyarsk; 2024, р. 213-215.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Puzanov I., Zavadyak A., Tretiyakov Y., Morozov M., Gubin A., Platonov V., et al. Electrical resistance preheating of high-amperage cells // Engineering &amp; Technologies. 2014. Vol. 7. Iss. 5. P. 552–560.</mixed-citation><mixed-citation xml:lang="en">Puzanov I., Zavadyak A., Tretiyakov Y., Morozov M., Gubin A., Platonov V., et al. Electrical resistance preheating of high-amperage cells. Engineering &amp; Technologies. 2014;7(5):552-560.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Mann V., Buzunov V., Pingin V., Zherdev A., Grigoriev V. Environmental Aspects of UC RUSAL’S Aluminum Smelters Sustainable Development // Light Metals / eds. С. Chesonis. Сham: Springer, 2019. P. 553–563. https://doi.org/10.1007/978-3-030-05864-7_70. EDN: SIHUYY.</mixed-citation><mixed-citation xml:lang="en">Mann V., Buzunov V., Pingin V., Zherdev A., Grigoriev V. Environmental aspects of UC RUSAL’S aluminum smelters sustainable development. In: Chesonis С. (eds.). Light Metals. Сham: Springer; 2019, p. 553-563. https://doi.org/10.1007/978-3-030-05864-7_70. EDN: SIHUYY.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Mann V., Buzunov V., Pitertsev N., Chesnyak V., Polyakov P. Reduction in power consumption at UC RUSAL’s Smelters 2012–2014 // Light Metals / eds. M. Hyland. Сham: Springer, 2015. Р. 757–762. https://doi.org/10.1007/978-3-319-48248-4_128. EDN: VADMNZ.</mixed-citation><mixed-citation xml:lang="en">Mann V., Buzunov V., Pitertsev N., Chesnyak V., Polyakov P. Reduction in power consumption at UC RUSAL’s Smelters 2012-2014. In: Hyland M. (eds.). Light Metals. Сham: Springer; 2015, р. 757-762. https://doi.org/10.1007/978-3-319-48248-4_128. EDN: VADMNZ.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Семьянинов Д.М., Кошкарев С. А. Успешная реализация проекта увеличения силы тока на 17 кА до 330 кА на электролизерах ОА-300 на заводе РУСАЛ // Цветные металлы и минералы – 2024: сб. тез. докл. XII Междунар. конгресса (г. Красноярск, 9–13 сентября 2024 г.). Красноярск, 2024. С. 251–253.</mixed-citation><mixed-citation xml:lang="en">Semyaninov D.M., Koshkarev S.A. Successful implementation of a project on increasing amperage by 17 kA up to 330 kA on OA-300 pots at a RUSAL smelter. In: Tsvetnye metally i mineraly – 2024: sbornik tezisov dokladov XII Mezhdunarodnogo кongressa = Non-ferrous metals and minerals: book of abstracts. 9–13 September 2024, Krasnoyarsk. Krasnoyarsk; 2024, р. 251-253.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Поляков П.В. Жизнь алюминиевого электролизера как диссипативной системы: монография. Красноярск: Сибирский федеральный университет, 2018. 190 с.</mixed-citation><mixed-citation xml:lang="en">Polyakov P.V. Life of an aluminum electrolyzer as a dissipative system. Krasnoyarsk: Siberian Federal University; 2018, 190 р. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Сорлье М., Ойя Х.А. Катоды алюминиевого электролизера / пер. с англ.; под ред. П.В. Полякова. Красноярск: Версо, 2013. 720 с.</mixed-citation><mixed-citation xml:lang="en">Sørlie M., Øye H.A. Cathodes in aluminium electrolysis, 2013, 720 р. (Russ. ed.: Katody alyuminievogo elektrolizera. Krasnoyarsk: Verso; 2013, 720 р.) 2</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Радионов Е.Ю. Расчет магнитогидродинамических параметров работы электролизеров с различным типом катодного кожуха // Вестник Иркутского государственного технического университета. 2020. Т. 24. № 3. С. 684–693. https://doi.org/10.21285/1814-3520-2020-3-684-693. EDN: LRHDLJ.</mixed-citation><mixed-citation xml:lang="en">Radionov E.Yu. Calculation of magnetohydrodynamic electrolyser parameters with various types of cathode shell. Proceedings of Irkutsk State Technical University. 2020;24(3):684-693. (In Russ.). https://doi.org/10.21285/1814-3520-2020-3-684-693. EDN: LRHDLJ.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Bojarevics V. MHD of aluminium cells with the effect of channels and cathode perturbation elements // The Minerals, Metals &amp; Materials Series / eds. В.А. Sadler. Сham: Springer, 2013. Р. 609–614. https://doi.org/10.1002/9781118663189.ch104.</mixed-citation><mixed-citation xml:lang="en">Bojarevics V. MHD of aluminium cells with the effect of channels and cathode perturbation elements. In: В.А. Sadler. (eds.). The Minerals, Metals &amp; Materials Series. Сham: Springer; 2013, р. 609-614. https://doi.org/10.1002/9781118663189.ch104.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Радионов Е.Ю., Немчинова Н.В., Третьяков Я.А. Моделирование магнитогидродинамических процессов в электролизерах при получении первичного алюминия // Вестник Иркутского государственного технического университета. 2015. № 7. С. 112–120. EDN: UBLOMB.</mixed-citation><mixed-citation xml:lang="en">Radionov E.Yu., Nemchinova N.V., Tretiakov Ya.A. Magnetohydrodynamic processes modeling in electrolyzers at primary aluminum production. Proceedings of Irkutsk State Technical University. 2015;7:112-120. (In Russ.). EDN: UBLOMB.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
