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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">ekip</journal-id><journal-title-group><journal-title xml:lang="ru">Экология и промышленность России</journal-title><trans-title-group xml:lang="en"><trans-title>Ecology and Industry of Russia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0395</issn><issn pub-type="epub">2413-6042</issn><publisher><publisher-name>ООО "Калвис"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18412/1816-0395-2026-5-16-19</article-id><article-id custom-type="elpub" pub-id-type="custom">ekip-3188</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>НАУЧНЫЕ РАЗРАБОТКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SCIENTIFIC DEVELOPMENTS</subject></subj-group></article-categories><title-group><article-title>К вопросу получения кристаллов сульфата железа из титаномагнетитового концентрата</article-title><trans-title-group xml:lang="en"><trans-title>On the Issue of Obtaining Iron Sulfate Crystals from Titanomagnetite Concentrate</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>Ефремов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Efremov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, заместитель директора по научной работе</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Deputy Director for Research</p></bio><email xlink:type="simple">podpiska@kalvis.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>Горячев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Goryachev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, научный сотрудник</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Research Scientist</p></bio><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дубровина</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Dubrovina</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер</p></bio><bio xml:lang="en"><p>Engineer</p></bio><email xlink:type="simple">ctls@kalvis.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>Дядик</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dyadik</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. экон. наук, первый заместитель генерального директора</p></bio><bio xml:lang="en"><p>Cand. Sci. (Economics), First Deputy Director General</p></bio><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макаров</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarov</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р техн. наук, директор</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Director</p></bio><email xlink:type="simple">ctls@kalvis.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт проблем промышленной экологии Севера Федеральный исследовательский центр Кольский научный центр РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Industrial Ecology Problems of the North, Federal Research Center, Kola Science Center, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Лаборатория природоподобных технологий и техносферной безопасности Арктики Центра наноматериаловедения Федеральный исследовательский центр Кольский научный центр РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Laboratory of Nature-Like Technologies and Technosphere Safety of the Arctic, Center for Nanomaterials Science, Federal Research Center, Kola Science Center, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Федеральный исследовательский центр Кольский научный центр РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Center, Kola Science Center of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>02</day><month>06</month><year>2026</year></pub-date><volume>30</volume><issue>5</issue><fpage>16</fpage><lpage>19</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ООО "Калвис", 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">ООО "Калвис"</copyright-holder><copyright-holder xml:lang="en">ООО "Калвис"</copyright-holder><license xlink:href="https://www.ecology-kalvis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.ecology-kalvis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.ecology-kalvis.ru/jour/article/view/3188">https://www.ecology-kalvis.ru/jour/article/view/3188</self-uri><abstract><p>С целью переработки титаномагнетитового концентрата (Хибинский массив) подобраны оптимальные технологические режимы: температура 80 °С, СH2SO4 50 %, соотношение Т:Ж — 1:3, интенсивность перемешивания 400 мин-1, продолжительность 180 мин. Из продуктивных растворов получен сульфат железа, из которого был приготовлен коагулянт для удаления взвешенных веществ. Установлено, что эффективность удаления взвешенных веществ при использовании коагулянта составила 97,3 %. Предложена технологическая схема переработки концентрата с получением кристаллов сульфата железа.</p></abstract><trans-abstract xml:lang="en"><p>In order to process titanomagnetite concentrate (Khibiny massif), optimal technological regimes were selected: temperature 80 °C, СH2SO4 concentration 50%, solid-to-liquid ratio 1:3, stirring intensity 400 min-1, duration 180 min. Iron sulfate was obtained from productive solutions, from which a coagulant for the removal of suspended solids was prepared. It was established that the efficiency of suspended solids removal using the coagulant reached 97.3%. A technological scheme for concentrate processing with the production of iron sulfate crystals was proposed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>титаномагнетитовый концентрат</kwd><kwd>сернокислотное выщелачивание</kwd><kwd>сульфат железа</kwd><kwd>коагуляция</kwd><kwd>взвешенные вещества</kwd></kwd-group><kwd-group xml:lang="en"><kwd>titanomagnetite concentrate</kwd><kwd>sulfuric acid leaching</kwd><kwd>iron sulfate</kwd><kwd>coagulation</kwd><kwd>suspended solids</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках НИР FMEZ-2025-0065 "Разработка и оптимизация технологических схем переработки титаномагнетитового концентрата, выделяемого из хвостов апатитовой флотации с получением товарных продуктов".</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of research project FMEZ-2025-0065 "Development and optimization of technological schemes for processing titanium-magnetite concentrate extracted from tailings of apatite flotation to produce commercial products".</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">Shaikh L., Pandit A., Ranade V. 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