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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">kaz29</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Казахстанско-Британского технического университета</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of the Kazakh-British Technical University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-6688</issn><issn pub-type="epub">2959-8109</issn><publisher><publisher-name>Казахстанско-Британский Технический Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55452/1998-6688-2025-22-3-186-198</article-id><article-id custom-type="elpub" pub-id-type="custom">kaz29-2115</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>МАТЕМАТИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>МОДЕЛИРОВАНИЕ И ИССЛЕДОВАНИЕ ПРОЦЕССА ВЫЩЕЛАЧИВАНИЯ УРАНА</article-title><trans-title-group xml:lang="en"><trans-title>MODELING AND STUDY OF THE URANIUM LEACHING PROCESS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2180-2785</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калтаев</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaltayev</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.ф.-м.н., профессор, академик НАН РК при Президенте РК</p><p>Алматы</p></bio><bio xml:lang="en"><p>Dr.Phys.-Math.Sc., Professor, Academician of the National Academy of Sciences of the Republic of Kazakhstan</p><p>Almaty</p></bio><email xlink:type="simple">aidarkhan.kaltayev@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5334-6537</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Құрмансейіт</surname><given-names>М. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurmanseiit</surname><given-names>M. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>PhD</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>PhD</p><p>Almaty</p></bio><email xlink:type="simple">kurmanseiit.maksat@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3138-3326</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тунгатарова</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tungatarova</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>PhD, Dr. Eng.</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>PhD, Dr. Eng.</p><p>Almaty</p></bio><email xlink:type="simple">m.tungatarova@satbayev.university</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Казахский национальный исследовательский технический университет им. К.И. Сатпаева;&#13;
Институт механики и машиноведения им. академика У.А. Джолдасбекова;&#13;
Национальная академия наук при Президенте Республики Казахстан<country>Казахстан</country></aff><aff xml:lang="en">Satbayev University;&#13;
Joldasbekov Institute of Mechanics and Engineering;&#13;
National Academy of Sciences under the President of the Republic of Kazakhstan<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Казахский национальный исследовательский технический университет им. К.И. Сатпаева<country>Казахстан</country></aff><aff xml:lang="en">Satbayev University<country>Kazakhstan</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Казахский национальный исследовательский технический университет им. К.И. Сатпаева,;&#13;
Институт механики и машиноведения им. академика У.А. Джолдасбекова<country>Казахстан</country></aff><aff xml:lang="en">Satbayev University;&#13;
Joldasbekov Institute of Mechanics and Engineering<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>09</month><year>2025</year></pub-date><volume>22</volume><issue>3</issue><fpage>186</fpage><lpage>198</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Калтаев А., Құрмансейіт М.Б., Тунгатарова М.С., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Калтаев А., Құрмансейіт М.Б., Тунгатарова М.С.</copyright-holder><copyright-holder xml:lang="en">Kaltayev A., Kurmanseiit M.B., Tungatarova M.S.</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://vestnik.kbtu.edu.kz/jour/article/view/2115">https://vestnik.kbtu.edu.kz/jour/article/view/2115</self-uri><abstract><p>В данной работе разработана и представлена имитационная модель процесса подземного выщелачивания урана, разработанная с учетом сложной кинетики растворения соединений четырех- и шестивалентного урана, а также рудовмещающей породы при взаимодействии с выщелачивающим раствором. Для определения констант скоростей реакции были использованы экспериментальные данные по извлечению урана из образца руды, помещенного в трубку с проточной схемой выщелачивания. На основании анализа экспериментальных кривых извлечения урана были определены константы скоростей основных реакций между соединениями урана и компонентами руды с выщелачивающим реагентом. Полученные параметры легли в основу численного моделирования, которое позволило прогнозировать динамику извлечения урана во времени. Разработанная модель была апробирована на данных полевого эксперимента, проведенного на участке месторождения Буденовское. Сравнение результатов моделирования с экспериментальными данными кривых извлечений показало хорошее совпадение, что подтверждает достоверность модели и ее практическую применимость для прогнозирования и оптимизации технологических процессов подземного выщелачивания урана.</p></abstract><trans-abstract xml:lang="en"><p>This study presents the development of a simulation model for the in-situ leaching (ISL) process of uranium, incorporating the complex kinetics of the dissolution of both tetravalent and hexavalent uranium compounds, as well as the interaction of the leaching solution with the ore-bearing host rock. To determine the reaction rate constants, experimental data were obtained from a flow-through leaching setup using a representative ore sample. Analysis of the resulting uranium extraction curves enabled the identification of the rate constants for the key chemical reactions between the ore constituents and the leaching reagent. These parameters were subsequently used as input for numerical simulations aimed at predicting the temporal dynamics of uranium recovery. The model was validated against field data collected from the Budenovskoye uranium deposit. The comparison between simulated and experimental extraction curves demonstrated strong agreement, thereby confirming the robustness and reliability of the model. The results underscore the model’s potential for practical application in forecasting and optimizing the performance of in-situ leaching operations for uranium recovery.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>подземное выщелачивание урана</kwd><kwd>химическая модель процесса</kwd><kwd>математическая модель процесса</kwd><kwd>моделирование процесса добычи</kwd><kwd>константы скоростей реакции</kwd><kwd>кривая извлечения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>in-situ leaching of uranium</kwd><kwd>chemical model</kwd><kwd>mathematical model</kwd><kwd>modeling of extraction process</kwd><kwd>reaction rate constants</kwd><kwd>extraction curve</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Исследования проводились в рамках программы фундаментальных исследований Министерства науки и высшего образования Республики Казахстан (номер гранта: BR20280990).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Batterham R., Robinson D. 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