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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">10.17073/2500-0632-2025-06-419</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-984</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>Application of polystyrene sulfonates for the depression of magnesium-containing silicates in copper-nickel ore flotation</article-title><trans-title-group xml:lang="ru"><trans-title>Применение полиcтиролсульфонатов для депрессии магнийсодержащих силикатов при флотации медно-никелевых руд</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7955-5273</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лавриненко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lavrinenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анатолий Афанасьевич Лавриненко – доктор технических наук, главный научный сотрудник, заведующий лабораторией</p><p>г. Москва</p></bio><bio xml:lang="en"><p>Anatoly A. Lavrinenko – Dr. Sci. (Eng.), Chief Researcher, Head of the Laboratory</p><p>Moscow</p></bio><email xlink:type="simple">lavrin_a@mail.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/0000-0002-7968-3144</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гольберг</surname><given-names>Г. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Golberg</surname><given-names>G. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Григорий Юрьевич Гольберг – доктор технических наук, ведущий научный сотрудник</p><p>г. Москва</p><p>Scopus ID 41761734500</p></bio><bio xml:lang="en"><p>Grigory Yu. Golberg – Dr. Sci. (Eng.), Leading Researcher</p><p>Moscow</p></bio><email xlink:type="simple">gr_yu_g@mail.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/0000-0002-5980-8472</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецова</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsova</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Николаевна Кузнецова – кандидат технических наук, старший научный сотрудник</p><p>г. Москва</p><p>Scopus ID 57201564209</p></bio><bio xml:lang="en"><p>Irina N. Kuznetsova – Cand. Sci. (Eng.), Senior Researcher</p><p>Moscow</p><p>Scopus ID 57201564209</p></bio><email xlink:type="simple">iren-kuznetsova@mail.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/0000-0002-5655-1747</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лусинян</surname><given-names>О. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Lusinyan</surname><given-names>O. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Оганес Георгиевич Лусинян – кандидат технических наук, ведущий инженер</p><p>г. Москва</p><p>Scopus ID 57201648662</p></bio><bio xml:lang="en"><p>Oganes G. Lusinyan – Cand. Sci. (Eng.), Lead Engineer</p><p>Moscow</p><p>Scopus ID 57201648662</p></bio><email xlink:type="simple">lusinyan.oganes@yandex.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/0000-0003-4348-8854</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тверской</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tverskoy</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Аркадьевич Тверской – доктор химических наук, профессор</p><p>г. Москва</p><p>Scopus ID 6604012434</p><p>ResearcherID H-8042-2017</p></bio><bio xml:lang="en"><p>Vladimir A. Tverskoy – Dr. Sci. (Chem.), Professor</p><p>Moscow</p><p>Scopus ID 6604012434</p><p>ResearcherID H-8042-2017</p></bio><email xlink:type="simple">tverskoj@mirea.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт проблем комплексного освоения недр имени академика Н. В. Мельникова РАН<country>Россия</country></aff><aff xml:lang="en">Research Institute of Comprehensive Exploitation of Mineral Resources of the Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">МИРЭА – Российский технологический университет, Институт тонких химических технологий имени М. В. Ломоносова<country>Россия</country></aff><aff xml:lang="en">MIREA – Russian Technological University, Lomonosov Institute of Fine Chemical Technologies<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>13</day><month>10</month><year>2025</year></pub-date><volume>10</volume><issue>3</issue><fpage>280</fpage><lpage>288</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Lavrinenko A.A., Golberg G.Y., Kuznetsova I.N., Lusinyan O.G., Tverskoy V.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Лавриненко А.А., Гольберг Г.Ю., Кузнецова И.Н., Лусинян О.Г., Тверской В.А.</copyright-holder><copyright-holder xml:lang="en">Lavrinenko A.A., Golberg G.Y., Kuznetsova I.N., Lusinyan O.G., Tverskoy V.A.</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/984">https://mst.misis.ru/jour/article/view/984</self-uri><abstract><p>It is very urgent to increase the efficiency of depressing magnesium-containing silicates (MS) in the course of the flotation of copper-nickel ores to reduce the content of magnesium in the concentrate, which causes a significant increase in energy consumption in pyrometallurgical processing of the concentrate. The use of polymer reagents containing sulfo groups seems to be a promising area of research. However, only lignosulfonates have been studied so far in this field. The question of the effectiveness of the depressing effect of other polymer sulfonates including polystyrene sulfonates (PSS), and their comparison with polysaccharides used in industrial conditions remains unclear. The purpose of this work is to study the depressing effect of PSS on the performance of bulk flotation of copper-nickel ores. Research objectives: to experimentally compare the effectiveness of the depressing effect of PSS and a reagent from the polysaccharide class on MS; to determine the modes of PSS use to reduce the magnesium content in the concentrate without significantly reducing the recovery of copper and nickel into the bulk concentrate; to establish the effect of molecular weight and the method of obtaining PSS samples on the effectiveness of their depressing effect. Laboratory experimental studies were carried out on the bulk flotation of copper-nickel ores from the Kola Peninsula, containing 15.7% of magnesium, 0.44% of nickel and 0.25% of copper. The effect of the following polymer anionic reagents on the flotation was studied: PSSs with molecular weight ranging from 89,000 to 208,000 g/mol; polyanionic cellulose (PAC-N) was used for comparison. To increase the effectiveness of these reagents, magnesium chloride was previously added. It was found that the lowest magnesium content in the concentrate of 14.7% was achieved using a composition of magnesium chloride and PSS against 16.7% without the depressants. It was shown that PSS provides a higher recovery of copper (by 7%) and nickel (by 8%) into the concentrate than when using PAC-N, since PSS, unlike polysaccharides, does not form chelate complexes with these metals. It was also shown that for PSS samples, the molecular weight within these limits has virtually no effect on the studied ore flotation performance. New scientific knowledge has been obtained about the effect of the consumption and properties of PSS on the flotation performance. It has been shown that the practical use of this class of reagents is advisable for the flotation of copper-nickel ores with a high magnesium content in cases where it is necessary to achieve the maximum possible decreasing the content of this element in the concentrate without significantly reducing the recovery of copper and nickel.</p></abstract><trans-abstract xml:lang="ru"><p>Весьма актуальной является задача повышения эффективности депрессии магнийсодержащих силикатов (МС) при флотации медно-никелевых руд для снижения содержания в концентрате магния, вызывающего существенное увеличение энергозатрат на пирометаллургическую переработку концентрата. Перспективным направлением представляется применение полимерных реагентов, содержащих сульфогруппы. Однако до настоящего времени изучено действие только лигносульфонатов. Остаётся неясным вопрос об эффективности депрессирующего действия других полимерных сульфонатов, включая полистиролсульфонаты (ПСС), и в их сравнении с полисахаридами, применяемыми в промышленных условиях. Цель настоящей работы: изучение депрессирующего действия ПСС на эффективность коллективной флотации медно-никелевой руды. Задачи исследований: экспериментальное сравнение эффективности депрессирующего действия ПСС и реагента из класса полисахаридов на МС; определение режимов применения ПСС, обеспечивающих снижение содержания магния в пенном продукте без существенного снижения извлечения меди и никеля в коллективный концентрат; установление влияния молекулярной массы и способа получения образцов ПСС на эффективность их депрессирующего действия. Выполнены лабораторные экспериментальные исследования по коллективной флотации медно-никелевой руды Кольского полуострова, содержащей 15,7 % магния, 0,44 % никеля и 0,25 % меди. Изучено влияние на флотацию полимерных анионоактивных реагентов: ПСС со значениями молекулярной массы от 89 000 до 208 000 г/моль; для сравнения применяли полианионную целлюлозу (ПАЦ-Н). Для повышения эффективности действия этих реагентов предварительно добавляли хлорид магния. Установлено, что наименьшее содержание магния в концентрате достигается применением композиции хлорида магния и ПСС и составляет 14,7 % против 16,7 % без депрессоров. Показано, что ПСС обеспечивает более высокое извлечение меди (на 7 %) и никеля (на 8 %) в концентрат, чем в случае применения ПАЦ-Н, так как ПСС, в отличие от полисахаридов, не образует хелатные комплексы с указанными металлами. Также показано, что для образцов ПСС значение молекулярной массы в указанных пределах практически не влияет на показатели флотации исследованной руды. Получены новые научные знания о влиянии расхода и свойств ПСС на показатели флотации и показано, что практическое применение этого класса реагентов целесообразно при флотации медно-никелевых руд с высоким содержанием магния в тех случаях, когда требуется достигнуть максимально возможного снижения содержания этого элемента в концентрате без существенного снижения извлечения меди и никеля.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>флотация</kwd><kwd>медно-никелевая руда</kwd><kwd>депрессия магнийсодержащих силикатов</kwd><kwd>полистиролсульфонаты</kwd><kwd>катионы магния</kwd><kwd>полианионная целлюлоза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>flotation</kwd><kwd>copper-nickel ore</kwd><kwd>depression of magnesium-containing silicates</kwd><kwd>polystyrene sulfonates</kwd><kwd>magnesium cations</kwd><kwd>polyanionic cellulose</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">Боярко Г. 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