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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2020-2-92-103</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-226</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="en"><subject>BENEFICIATION AND PROCESSING OF NATURAL AND TECHNOGENIC RAW MATERIALS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОБОГАЩЕНИЕ, ПЕРЕРАБОТКА МИНЕРАЛЬНОГО И ТЕХНОГЕННОГО СЫРЬЯ</subject></subj-group></article-categories><title-group><article-title>Assessment of Gravity Dressability of Gold Ore - GRG Test</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка гравитационной обогатимости золотосодержащей руды - GRG</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>Суримбаев</surname><given-names>Б. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Surimbayev</surname><given-names>B. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Каналы</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kanaly</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Болотова</surname><given-names>Л. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bolotova</surname><given-names>L. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шалгымбаев</surname><given-names>С. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Shalgymbayev</surname><given-names>S. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алматы</p></bio><bio xml:lang="en"><p>Almaty</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Филиал Республиканского государственного предприятия «Национальный центр по комплексной переработке минерального сырья Республики Казахстан» Государственное научно-производственное объединение промышленной экологии «Казмеханобр» (Филиал РГП «НЦ КПМС РК» ГНПОПЭ «Казмеханобр»)<country>Казахстан</country></aff><aff xml:lang="en">State Scientific and Production Concern for Industrial Ecology "Kazmekhanobr" (Branch of Republican State Enterprise "National Center for Integrated Processing of Mineral Resources of the Republic of Kazakhstan”)<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>28</day><month>07</month><year>2020</year></pub-date><volume>5</volume><issue>2</issue><fpage>92</fpage><lpage>103</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Surimbayev B.N., Kanaly E.S., Bolotova L.S., Shalgymbayev S.T., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Суримбаев Б.Н., Каналы Е.С., Болотова Л.С., Шалгымбаев С.Т.</copyright-holder><copyright-holder xml:lang="en">Surimbayev B.N., Kanaly E.S., Bolotova L.S., Shalgymbayev S.T.</copyright-holder><license 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://mst.misis.ru/jour/article/view/226">https://mst.misis.ru/jour/article/view/226</self-uri><abstract><p>Gravity methods are widely used for processing of gold ores. But many aspects of these processing techniques require improvement. In the study, methods of fire assay, gravimetric, chemical, mineralogical analyses of gold ores were used. In terms of sulfide sulfur content and degree of sulfur oxidation, the gold ore is assigned to the low-sulfide type of ore in the primary zone. Mineralogical analysis showed the ore-bearing rock is represented by phyllite. Gold in the ore occurs mainly in the form of free large and fine particles. The fine gold is closely associated with pyrite. GRG test was carried out for assessing gravity dressability of the gold ore. The total gold recovery is more than 41 %. The highest gold recoveries were achieved at the first stage at 100 % of -1.6 mm ore grain size, and at the third stage at 80 % of -0.071 mm ore grain size. This indicates that both relatively large gold and fine free gold particles are present in the ore. This is also confirmed by mineralogical analysis. The GRG test results showed that the gold ore can be effectively concentrated using centrifugal concentrators. The level of gold recovery by gravity at the multi-stage ore grinding is quite high. When developing the ore concentration process flow sheet, gravity separation in centrifugal concentrators should be included.</p></abstract><trans-abstract xml:lang="ru"><p>Гравитационные методы широко применяются при переработке золотосодержащих руд. Но многие аспекты этого направления обогащения требуют совершенствования. В работе использованы методы пробирно-гравиметрического, химического, минералогического анализов золотосодержащей руды. Золотосодержащая руда по содержанию сульфидной серы и степени окисления серы отнесена к убого-сульфидному типу руды первичной зоны. По данным минералогического анализа, руда представлена глинисто-слюдистыми сланцами. Золото в рудах находится в виде свободных крупных и мелких зерен, преобладает золото свободное. Мелкое золото тесно ассоциируется с пиритом. Для оценки гравитационной обогатимости золотосодержащей руды проведен GRG-тест. Суммарное извлечение золота составляет более 41 %. Наиболее высокие показатели извлечения золота получены на первой стадии при крупности 100 % класса −1,6 мм и третьей стадии при крупности 80 % класса −0,071 мм. Это указывает на то, что в руде присутствуют и относительно крупные золотины, и мелкие свободные, что подтверждается минералогическим анализом. Результаты GRG-теста показали, что золотосодержащая руда эффективно обогащается на центробежных концентраторах. Уровень извлечения золота гравитацией при стадиальном измельчении руды достаточно высок. При разработке технологической схемы обогащения руды необходимо предусмотреть гравитационное обогащение на центробежных концентраторах.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гравитационные методы обогащения</kwd><kwd>GRG-тест</kwd><kwd>золотосодержащая руда</kwd><kwd>оценка гравитационной обогатимости руды</kwd><kwd>обогащение золота</kwd><kwd>центробежные концентраторы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gravity separation methods</kwd><kwd>GRG test</kwd><kwd>gold ore</kwd><kwd>assessment of gravity dressability of gold ore</kwd><kwd>gold ore concentration</kwd><kwd>centrifugal concentrators</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">Wills B. A., Finch J. A. Gravity Concentration. Wills’ Mineral Processing Technology. Elsevier; 2016. P. 223–244. DOI: 10.1016/B978-0-08-097053-0.00010-8.</mixed-citation><mixed-citation xml:lang="en">Wills B. 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