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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">10.21285/1814-3520-2025-3-389-398</article-id><article-id custom-type="edn" pub-id-type="custom">HNUWVW</article-id><article-id custom-type="elpub" pub-id-type="custom">ipolytech-964</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>Усовершенствованная методика рационального анализа золота в углистом сорбционно-активном минеральном сырье</article-title><trans-title-group xml:lang="en"><trans-title>Improved gold diagnostic leaching procedure for carbonaceous preg-robbing ores</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-4659-6490</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бывальцев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Byvaltsev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бывальцев Александр Владимирович, к.т.н., ведущий научный сотрудник лаборатории гидрометаллургии</p><p>664025, г. Иркутск, б-р Гагарина, 38</p></bio><bio xml:lang="en"><p>Alexander V. Byvaltsev, Cand. Sci. (Eng.), Leading Researcher of the Hydrometallurgy Laboratory</p><p>38, Gagarin Boulevard, Irkutsk</p></bio><email xlink:type="simple">torrot_2008@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хмельницкая</surname><given-names>О. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Khmelnitskaya</surname><given-names>O. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хмельницкая Ольга Давыдовна, к.т.н., ведущий научный сотрудник лаборатории гидрометаллургии</p><p>664025, г. Иркутск, б-р Гагарина, 38</p></bio><bio xml:lang="en"><p>Olga D. Khmelnitskaya, Cand. Sci. (Eng.), Leading Researcher of the Hydrometallurgy Laboratory</p><p>38, Gagarin Boulevard, Irkutsk</p></bio><email xlink:type="simple">hod@irgiredmet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Войлошников</surname><given-names>Г. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Voiloshnikov</surname><given-names>G. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Войлошников Григорий Иванович, д.т.н., профессор, заместитель генерального директора по научно-методической и инновационной деятельности </p><p>664025, г. Иркутск, б-р Гагарина, 38</p></bio><bio xml:lang="en"><p>Grigoriy I. Voiloshnikov, Dr. Sci. (Eng.), Professor, Deputy General Director for Science, Methodology and Innovations</p><p>38, Gagarin Boulevard, Irkutsk</p></bio><email xlink:type="simple">greg@irgiredmet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Богородский</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bogorodskiy</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Богородский Евгений Владимирович, к.т.н., заведующий лабораторией гидрометаллургии</p><p>664025, г. Иркутск, б-р Гагарина, 38</p></bio><bio xml:lang="en"><p>Evgeniy V. Bogorodskiy, Cand. Sci. (Eng.), Head of the Hydrometallurgy Laboratory</p><p>38, Gagarin Boulevard, Irkutsk</p></bio><email xlink:type="simple">bogorodskiy@irgiredmet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4624-8980</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гончарук</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Goncharuk</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гончарук Максим Андреевич, инженер лаборатории гидрометаллургии; аспирант</p><p>664025, г. Иркутск, б-р Гагарина, 38</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Maksim A. Goncharuk, Engineer of the Hydrometallurgy Laboratory; Postgraduate Student</p><p>38, Gagarin Boulevard, Irkutsk</p><p>83, Lermontov St., Irkutsk 664074</p></bio><email xlink:type="simple">maksimgoncharuk0708@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО «Иргиредмет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irgiredmet JSC</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>АО «Иргиредмет»; Иркутский национальный исследовательский технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irgiredmet JSC; Irkutsk National Research Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>21</day><month>09</month><year>2025</year></pub-date><volume>29</volume><issue>3</issue><fpage>389</fpage><lpage>398</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бывальцев А.В., Хмельницкая О.Д., Войлошников Г.И., Богородский Е.В., Гончарук М.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Бывальцев А.В., Хмельницкая О.Д., Войлошников Г.И., Богородский Е.В., Гончарук М.А.</copyright-holder><copyright-holder xml:lang="en">Byvaltsev A.V., Khmelnitskaya O.D., Voiloshnikov G.I., Bogorodskiy E.V., Goncharuk M.A.</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/964">https://ipolytech.elpub.ru/jour/article/view/964</self-uri><abstract><p>Цель – разработка усовершенствованной методики и повышение достоверности рационального анализа золота в углистом сорбционно-активном минеральном сырье. При исследовании высокосорбцион но-активного сырья классическая методика рационального анализа золота приводит к искажению результатов: доля цианируемого золота оказывается заниженной, а часть извлекаемого золота ошибочно отнесена к упор ной форме. Это обусловлено высокой сорбционной активностью природного органического углерода, который активно сорбирует золото из жидкой фазы цианистой пульпы, конкурируя с искусственными сорбентами на всех стадиях выщелачивания. Разработана усовершенствованная методика рационального анализа высоко сорбционно-активного сырья, включающая двухстадийную обработку на каждом этапе: сначала проводится цианирование в стандартных условиях с увеличенной загрузкой сорбента, затем – замена сорбента на свежий и высокотемпературная сорбционная обработка при температуре 80–95°C в течение 2 ч. Методика была апробирована на нескольких видах углистого минерального сырья и позволила оценить полноту извлечения золота при цианировании. Так, результаты показали повышение доли золота в цианируемой форме на 4,2–12,5% по сравнению с классической методикой, что позволяет более точно дифференцировать формы нахождения металла и скорректировать технологические подходы к переработке сорбционно-активного сырья. Применение данной методики особенно важно для руд с высоким содержанием органического углерода и высокой сорбционной активностью, так как она обеспечивает более достоверные фазовые характеристики золота в сырье и позволяет производить корректный выбор технологической схемы переработки данного вида сырья. Методика рекомендована для внедрения в лабораторную, а также производственную практику.</p></abstract><trans-abstract xml:lang="en"><p>The article presents an improved procedure for the diagnostic leaching of gold in carbonaceous preg-robbing mineral ores. When researching highly preg-robbing ores, classic diagnostic gold leaching approaches often lead to distorted results: the proportion of cyanidable gold is underestimated, while recoverable gold is er roneously attributed to refractory forms. This discrepancy arises from the high natural sorption activity of organic carbon, which interferes with artificial sorbents at all leaching stages to competitively adsorb gold from the liquid phase of cyanide pulp. An advanced diagnostic two-stage leaching procedure for highly preg-robbing materials has been developed: first, cyanidation is carried out under standard conditions with an increased sorbent load, then high-temperature sorption processing at a temperature of 80–95°C for 2 hours is carried out with fresh sorbent. Tests carried out on various carbonaceous mineral products demonstrated improved gold recovery efficiency during cyanidation. The 4.2–12.5 % increase in obtained cyanidable gold as compared to the conventional method enables more precise differentiation of gold forms and optimization of processing strategies for preg-robbing ores. This pro cedure is particularly valuable for ores having a high organic carbon content and strong preg-robbing capacity due to providing more reliable phase characterization of gold and supporting accurate selection of processing technolo gies. The protocol is recommended for implementation in both laboratory and industrial practice.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>золото</kwd><kwd>рациональный анализ</kwd><kwd>цианирование</kwd><kwd>углистое вещество</kwd><kwd>сорбционная активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold</kwd><kwd>diagnostic leaching</kwd><kwd>cyanidation</kwd><kwd>carbonaceous matter</kwd><kwd>preg-robbing</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">Edahbi M., Ounoughi M., Bouzahzah H., Boujlel K. CIL gold loss characterization within oxidized leach tails: creating a synergistic approach between mineralogical characterization, diagnostic leach tests, and preg-robbing tests // Minerals. 2019. Vol. 9. Iss. 9. Р. 557. https://doi.org/10.3390/min9090557.</mixed-citation><mixed-citation xml:lang="en">Edahbi M., Ounoughi M., Bouzahzah H., Boujlel K. CIL gold loss characterization within oxidized leach tails: creating a synergistic approach between mineralogical characterization, diagnostic leach tests, and preg-robbing tests. Minerals. 2019;9(9):557. https://doi.org/10.3390/min9090557.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Saders J.A., Gravel J., Janke L., Hall L. In-depth study on carbon speciation focussed on graphite // Symposium on Strategic and Critical Materials Proceedings (Victoria, 13–14 November 2015). Victoria: British Columbia Ministry of Energy and Mines, 2015. P. 187–191.</mixed-citation><mixed-citation xml:lang="en">Saders J.A., Gravel J., Janke L., Hall L. In-depth study on carbon speciation focussed on graphite. In: Symposium on Strategic and Critical Materials Proceedings. 13–14 November 2015, Victoria. Victoria: British Columbia Ministry of Energy and Mines; 2015, p. 187-191.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Bas A.D., Altinkaya P., Yazici E.Y., Deveci H. Preg-robbing potential of sulphide-bearing gold ores // Proceedings of 13th International Mineral Processing Symposium-IMPS (Bodrum, 10–12 October 2012). Bodrum, 2012. P. 613–618.</mixed-citation><mixed-citation xml:lang="en">Bas A.D., Altinkaya P., Yazici E.Y., Deveci H. Preg-robbing potential of sulphide-bearing gold ores. In:  Proceedings of 13th International Mineral Processing Symposium-IMPS. 10–12 October 2012, Bodrum. Bodrum; 2012, р. 613-618.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Borges G.F. Efeito preg-robbing em minerais auríferos por compostos carbonáceos: estado da arte. Ouro Preto: Escola de Minas, Universidade Federal de Ouro Preto, 2021. 48 р.</mixed-citation><mixed-citation xml:lang="en">Borges G.F. Efeito preg-robbing em minerais auríferos por compostos carbonáceos: estado da arte. Ouro Preto: Escola de Minas, Universidade Federal de Ouro Preto; 2021, 48 р.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Mabwe N.R. Potential pre-treatment and processing routes for recovery of gold from complex (refractory) gold ores. A review // Proceedings of the 2nd African International Conference on Industrial Engineering and Operations Management (Harare, 7–10 December 2020). Harare, 2020. P. 1708–1715.</mixed-citation><mixed-citation xml:lang="en">Mabwe N.R. Potential pre-treatment and processing routes for recovery of gold from complex (refractory) gold ores. A review. In: Proceedings of the 2nd African International Conference on Industrial Engineering and Operations Management. 7–10 December 2020, Harare. Harare; 2020, p. 1708-1715.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Cetin M.C., Altun N.E., Atalay M.Ü., Büyüktanır K. Bottle roll testing for cyanidation of gold ores: problems related to standardized procedures on difficult-to-process ores // Proceedings of the 3rd World Congress on Mechanical, Chemical, and Material Engineering (Rome, 8–10 June 2017). Rome, 2017. P. 148. https://doi.org/10.11159/mmme17.148.</mixed-citation><mixed-citation xml:lang="en">Cetin M.C., Altun N.E., Atalay M.Ü., Büyüktanır K. Bottle roll testing for cyanidation of gold ores: problems related to standardized procedures on difficult-to-process ores. In: Proceedings of the 3rd World Congress on Mechanical, Chemical, and Material Engineering. 8–10 June 2017, Rome. Rome; 2017, p. 148. https://doi.org/10.11159/mmme17.148.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Dunne R., LeVier M., Acar S., Kappes R. Keynote address: Newmont’s contribution to gold technology // World Gold Conference (Johannesburg, 2009). Johannesburg: Southern African Institute of Mining and Metallurgy, 2009. P. 221–230.</mixed-citation><mixed-citation xml:lang="en">Dunne R., LeVier M., Acar S., Kappes R. Keynote address: Newmont’s contribution to gold technology. In:  World Gold Conference. 2009, Johannesburg. Johannesburg: Southern African Institute of Mining and Metallurgy; 2009, p. 221-230.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Бывальцев А.В., Войлошников Г.И., Хмельницкая О.Д., Богородский Е.В. Проблемы переработки углистых сорбционноактивных золотых руд // Теория и технология металлургического производства. 2024. Т. 51. № 4. С. 18–23. EDN: PTZFQB.</mixed-citation><mixed-citation xml:lang="en">Byvaltsev A.V., Voiloshnikov G.I., Khmelnitskaya O.D., Bogorodskiy E.V. Problems of processing carbonaceous sorption-active gold ores. The theory and process engineering of metallurgical production. 2024;51(4):18-23. (In Russ.). EDN: PTZFQB.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Asamoah R.K., Amankwah R.K., Addai-Mensah J. Cyanidation of refractory gold ores: A Review // 3rd UMaT Biennial International Mining and Mineral Conference (Tarkwa, Juli 2014). Tarkwa, 2014. P. 204–212. https://doi.org/10.13140/2.1.4772.6407.</mixed-citation><mixed-citation xml:lang="en">Asamoah R.K., Amankwah R.K., Addai-Mensah J. Cyanidation of refractory gold ores: A Review. In: 3rd UMaT Biennial International Mining and Mineral Conference. Juli 2014, Tarkwa. Tarkwa; 2014, p. 204-212. https://doi.org/10.13140/2.1.4772.6407.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Mustapha A., Asamoah R.K., Ofori-Sarpong G., Amankwah R.K. Preg-robbing characteristics of gold ores in Ghana // 3rd UMaT Biennial International Mining and Mineral Conference (Tarkwa, Juli 2014). Tarkwa, 2014. P. 192–196.</mixed-citation><mixed-citation xml:lang="en">Mustapha A., Asamoah R.K., Ofori-Sarpong G., Amankwah R.K. Preg-robbing characteristics of gold ores in Ghana. In: 3rd UMaT Biennial International Mining and Mineral Conference. Juli 2014, Tarkwa. Tarkwa; 2014, p. 192-196.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Ahtiainen R., Lundström M., Liipo J. Preg-robbing verification and prevention in gold chloride-bromide leaching // Minerals Engineering. 2018. Vol. 128. P. 153–159. https://doi.org/10.1016/j.mineng.2018.08.037.</mixed-citation><mixed-citation xml:lang="en">Ahtiainen R., Lundström M., Liipo J. Preg-robbing verification and prevention in gold chloride-bromide leaching. Minerals Engineering. 2018;128:153-159. https://doi.org/10.1016/j.mineng.2018.08.037.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Бывальцев А.В., Войлошников Г.И., Хмельницкая О.Д. Методика подготовки углеродсодержащих хвостов цианирования к анализу // iPolytech Journal. 2025. Т. 29. № 1. С. 123–132. https://doi.org/10.21285/1814-3520-2025-1-123-132. EDN: IOWITS.</mixed-citation><mixed-citation xml:lang="en">Byvaltsev A.V., Voiloshnikov G.I., Khmelnitskaya O.D. A procedure for preparing carbonaceous cyanidation tailings for gold fire assay. iPolytech Journal. 2025;29(1):123-132. (In Russ.).  https://doi.org/10.21285/1814-3520-2025-1-123-132.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Helm M.M., Vaughan J.P., Staunton W.P. Evaluation of preg-robbing in Goldstrike carbonaceous ore using Raman spectroscopy // Proceedings of the 50th Conference of Metallurgists (Мontreal, 2–5 Оctober 2011). Montreal, 2011. P. 595–606.</mixed-citation><mixed-citation xml:lang="en">Helm M.M., Vaughan J.P., Staunton W.P. Evaluation of preg-robbing in Goldstrike carbonaceous ore using Raman spectroscopy. In: Proceedings of the 50th Conference of Metallurgists. 2–5 Оctober 2011, Мontreal. Montreal; 2011, р. 595-606.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Лодейщиков В.В. Технология извлечения золота и серебра из упорных руд. В 2-х т.; т. 2. Иркутск: Иргиредмет, 1999. 786 с.</mixed-citation><mixed-citation xml:lang="en">Lodeishchikov V.V. Technology of gold and silver extraction from refractory ores. Irkutsk: Irgiredmet; 1999,786 p. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Зеленов В.И. Методика исследований золото- и серебросодержащих руд. 3-е изд., перераб. и доп. М.: Недра, 1989. 302 с.</mixed-citation><mixed-citation xml:lang="en">Zelenov V.I. Methodology for studying gold- and silver-bearing ores. Moscow: Nedra; 1989, 302 р. (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Stephen R.S., Anuar W.N.S., Ismail S., Jabit N.A. Characterisation and diagnostic leaching of gold-bearing mineral ore, east coast peninsular Malaysia // Malaysian Journal of Microscopy. 2021. Vol. 17. Iss. 2. P. 139–153. https://doi.org/10.1016/S0892-6875(00)00156-4.</mixed-citation><mixed-citation xml:lang="en">Stephen R.S., Anuar W.N.S., Ismail S., Jabit N.A. Characterisation and diagnostic leaching of gold-bearing mineral ore, east coast peninsular Malaysia. Malaysian Journal of Microscopy. 2021;17(2):139-153.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Guner M.K., Bulut G., Hassanzadeh A., Lode S., Aasly K. Automated mineralogy and diagnostic leaching studies on bulk sulfide flotation concentrate of a refractory gold ore // Minerals. 2023. Vol. 13. Iss. 10. Р. 1243. https://doi.org/10.3390/min13101243.</mixed-citation><mixed-citation xml:lang="en">Guner M.K., Bulut G., Hassanzadeh A., Lode S., Aasly K. Automated mineralogy and diagnostic leaching studies on bulk sulfide flotation concentrate of a refractory gold ore. Minerals. 2023;13(10):1243. https://doi.org/10.3390/min13101243.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Henley K.J., Clarke N.C., Sauter P. Evaluation of a diagnostic leaching technique for gold in native gold and gold ± silver tellurides // Minerals Engineering. 2001. Vol. 14. Iss. 1. P. 1–12. https://doi.org/10.1016/S0892-6875(00)00156-4.</mixed-citation><mixed-citation xml:lang="en">Henley K.J., Clarke N.C., Sauter P. Evaluation of a diagnostic leaching technique for gold in native gold and gold ± silver tellurides. Minerals Engineering. 2001;14(1):1-12. https://doi.org/10.1016/S0892-6875(00)00156-4.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Celep O., Alp I., Deveci H. Application of diagnostic leaching technique for refractory gold ores // D.P.Ü. Fen Bilimleri Enstitüsü Dergisi. 2008. No. 16. P. 81–90.</mixed-citation><mixed-citation xml:lang="en">Celep O., Alp I., Deveci H. Application of diagnostic leaching technique for refractory gold ores. D.P.Ü. Fen Bilimleri Enstitüsü Dergisi. 2008;16:81-90.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Бекпулатов Ж.М., Худайбердиев Ф.Т. Изучение вещественного состава и разработка технологии переработки золотосодержащей пробы руды одного из месторождений Республики Узбекистан // Инновационная наука. 2017. Т. 3. № 4. С. 20–23. EDN: YLZMAH.</mixed-citation><mixed-citation xml:lang="en">Bekpulatov Zh.M., Khudaiberdiev F.T. Studying material composition and development of processing technology for a gold-bearing ore sample from one of the Uzbekistan Republic deposits. Innovatsionnaya nauka. 2017;3(4):20 23. (In Russ.). EDN: YLZMAH.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Шумилова Л.В. Технологическое тестирование упорных золотосодержащих руд (на примере месторождения Кокпатас) // Вестник Читинского государственного университета. 2009. № 3. С. 42–47. EDN: KYAPVT.</mixed-citation><mixed-citation xml:lang="en">Shumilova L.V. Refractory auriferous ore technological testing (by the example of Kokpatas deposit). Chita State University Journal. 2009;3:42-47. (In Russ.). EDN: KYAPVT</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>
