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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ МИСИС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2020-1-19-26</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-1064</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 редких и благородных металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Metallurgy of Rare and Precious Metals</subject></subj-group></article-categories><title-group><article-title>Особенности цементации золота электролизными цинковыми порошками в режиме перколяции</article-title><trans-title-group xml:lang="en"><trans-title>Features of gold cementation in percolation mode by electrolytic zinc powders</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>Наумов</surname><given-names>К. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Naumov</surname><given-names>K. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Инженер кафедры металлургии цветных металлов </p><p>620002, г. Екатеринбург, ул. Мира, 19</p></bio><bio xml:lang="en"><p>Engineer of the Department of metallurgy of non-ferrous metals </p><p>620002, Russia, Yekaterinburg, Mira str., 19</p></bio><email xlink:type="simple">naumov.konstantin@urfu.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>Лобанов</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Lobanov</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры металлургии цветных металлов </p><p>г. Екатеринбург</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), associate prof. of the Department of metallurgy of non-ferrous metals </p><p>Yekaterinburg</p></bio><email xlink:type="simple">lobanov-vl@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уральский федеральный университет им. первого Президента России Б.Н. Ельцина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>18</day><month>02</month><year>2020</year></pub-date><volume>0</volume><issue>1</issue><fpage>19</fpage><lpage>26</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Наумов К.Д., Лобанов В.Г., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Наумов К.Д., Лобанов В.Г.</copyright-holder><copyright-holder xml:lang="en">Naumov K.D., Lobanov V.G.</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://cvmet.misis.ru/jour/article/view/1064">https://cvmet.misis.ru/jour/article/view/1064</self-uri><abstract><p>Изучены физико-химические особенности дендритных цинковых порошков и их влияние на показатели цементационного осаждения золота из цианистых растворов. В лабораторных условиях получены 3 цинковых порошка методом электроэкстракции при различных условиях, различающиеся по крупности и площади удельной поверхности. Свойства полученных цинковых порошков и порошка, применяемого для цементации золота в настоящее время, оценены методами SEM (Jeol JSM-6390LA), BET (Gemini VII 2390) и лазерной дифракцией (Sympatec HELOS &amp; RODOS). Показано, что электролизные порошки обладают высокой удельной площадью поверхности (в 1,3–2,6 раз больше) и низкой насыпной плотностью (в 3,1–3,8 раз меньше) относительно цинкового порошка, используемого сейчас для цементации золота. Обнаружено, что за счет особых физических свойств электролизные порошки имеют низкое гидравлическое сопротивление, что дает возможность отказаться от внесения инертных добавок при цементации, увеличить производительность агрегатов и уменьшить нагрузку на оборудование. Отказ от применения инертных добавок дополнительно обеспечит повышение содержания золота в получаемом цементате. Дендритная форма полученных цинковых порошков компенсирует высокую крупность, что позволяет осаждать золото с высокой эффективностью. При длительном цикле цементации участок эффективного осаждения золота (извлечение более 97 %) у электролизного порошка оказался короче, чем у мелкодисперсного, используемого в данное время. Однако на практике цикл цементации всегда ограничен пропускной способностью мелкодисперсного порошка, и полностью реализовать потенциал цинка не представляется возможным. В разгружаемом цементате, как правило, содержится 25–35 % неизрасходованного цинка. Проведенные исследования показывают эффективность применения электролизного цинкового порошка для цементации золота из цианистых растворов.</p></abstract><trans-abstract xml:lang="en"><p>The study covers physicochemical features of dendritic zinc powders and their effect on gold cementation from cyanide solutions. Three zinc powders were obtained in a laboratory environment by electroextraction at different conditions, and these powders featured various particle size and specific surface area. The properties of zinc powders obtained and powder currently used for gold cementation were evaluated using SEM (Jeol JSM-6390LA), BET (Gemini VII 2390) and laser diffraction (Sympatec HELOS &amp; RODOS) methods. It is shown that electrolytic powders have high specific surface area (1.3–2.6 times more) and a low bulk density (3.1–3.8 times less), relative to zinc powder currently used for gold cementation. It was found that due to specific physical properties electrolytic powders have low hydraulic resistance, which eliminates the need for inert additives introduced during cementation, increases unit capacity and reduces the load on equipment. Inert additives elimination will additionally increase the gold content in the resulting product. The dendritic morfology of zinc powders obtained compensates high particle size resulting in the high efficiency of gold precipitation. At the long cementation cycle the effective gold deposition area (with gold extraction of more than 97 %) turned out to be shorter for electrolytic powder compared to fine powder currently used. However, in practice, the cementation cycle is always limited by fine powder throughput and it is not possible to achieve the full zinc potential. The resulting cementation product usually contains 25–35 % of unused zinc. These studies show the effectiveness of using electrolytic zinc powder for gold cementation from cyanide solutions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>золото</kwd><kwd>цинк</kwd><kwd>дендритный порошок</kwd><kwd>цементация</kwd><kwd>электроэкстракция</kwd><kwd>Меррилл-Кроу</kwd><kwd>перлит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold</kwd><kwd>zinc</kwd><kwd>dendritic powder</kwd><kwd>cementation</kwd><kwd>electroextraction</kwd><kwd>Merrill-Crowe</kwd><kwd>perlite</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">Marsden J.O., House C.I. The chemistry of gold extraction. 2-nd ed. Colrado: Society for mining, metallurgy, and exploration, 2006.</mixed-citation><mixed-citation xml:lang="en">Marsden J.O., House C.I. The chemistry of gold extraction. 2-nd ed. 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