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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">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2020-2-116-121</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1851</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>ФИЗИКО-ХИМИЧЕСКИЕ ОСНОВЫ МЕТАЛЛУРГИЧЕСКИХ ПРОЦЕССОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICO-CHEMICAL BASICS OF METALLURGICAL PROCESSES</subject></subj-group></article-categories><title-group><article-title>Распространение твердофазного восстановления железа в слое ильменитового концентрата</article-title><trans-title-group xml:lang="en"><trans-title>Distribution of solid-phase reduction of iron in a layer of ilmenite 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>Смирнов</surname><given-names>К. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>K. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры «Пирометаллургические процессы»</p><p>454080, Челябинск, пр. Ленина, 76</p></bio><bio xml:lang="en"><p>Postgraduate of the Chair “Pyrometallurgical Processes”</p><p>Chelyabinsk</p></bio><email xlink:type="simple">smirnovk@susu.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>Гамов</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gamov</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент, заведующий кафедрой «Пирометаллургические процессы»</p><p>454080, Челябинск, пр. Ленина, 76</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor, Head of the Chair “Pyrometallurgical Processes”</p><p>Chelyabinsk</p></bio><email xlink:type="simple">gamovpa@susu.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>Рощин</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Roshchin</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор, главный научный сотрудник кафедры «Пирометаллургические процессы»</p><p>454080, Челябинск, пр. Ленина, 76</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Chief Researcher of the Chair “Pyrometallurgical Processes”</p><p>Chelyabinsk</p></bio><email xlink:type="simple">roshchinve@susu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Южно-Уральский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>South Ural State 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>29</day><month>04</month><year>2020</year></pub-date><volume>63</volume><issue>2</issue><fpage>116</fpage><lpage>121</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Смирнов К.И., Гамов П.А., Рощин В.Е., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Смирнов К.И., Гамов П.А., Рощин В.Е.</copyright-holder><copyright-holder xml:lang="en">Smirnov K.I., Gamov P.A., Roshchin V.E.</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://fermet.misis.ru/jour/article/view/1851">https://fermet.misis.ru/jour/article/view/1851</self-uri><abstract><p>Переработка титансодержащих руд с извлечением всех основных полезных элементов является актуальной задачей с точки зрения рационального использования полезных ископаемых. Показано, что ни одна из существующих схем переработки не позволяет извлекать из титансодержащих железных руд одновременно все основные полезные элементы – железо, титан и ванадий. Эту задачу можно решить с использованием селективного извлечения этих элементов на основе новых представлений об электронном механизме восстановления. Экспериментально исследовано распространение процесса твердофазного селективного восстановления железа в глубь слоя зерен ильменитового концентрата от поверхности его контакта с порошком углеродсодержащего материала. Представлены результаты определения количества выделившейся металлической фазы по мере отдаления от границы контакта концентрат – восстановитель. На основе представленных результатов о количестве выделившейся металлической фазы сделан вывод о диффузионных процессах в слое контактирующих только между собой зерен концентрата, лимитирующих процесс восстановления железа. Вблизи плоскости контакта твердого восстановителя со слоем зерен концентрата скорость процессов восстановления железа преобладает над скоростью выделения из ильменита фаз с повышенным содержанием железа. В глубине слоя ильменитового концентрата процессу восстановления железа предшествует выделение из зерен концентрата железосодержащей силикатной фазы, в которой железо восстанавливается раньше, чем в зернах ильменита. Выделение железосодержащей силикатной фазы способствует спеканию зерен ильменита. Сделано заключение, что в слое концентрата, контактирующем со слоем твердого восстановителя, при отсутствии контакта каждого зерна ильменита с твердым восстановителем точечный контакт зерен и наличие в слое пустот между зернами не препятствуют распространению процесса восстановления в слое контактирующих только между собой зерен.</p></abstract><trans-abstract xml:lang="en"><p>Processing of titanium-containing ores with extraction of all the major elements is an urgent task of minerals rational use. It is shown that none of the existing processing schemes allows extracting of all the major useful elements at the same time from titanium-containing iron ores, i.e. – iron, titanium and vanadium. This problem can be solved using selective extraction of these elements based on new ideas about electronic reduction mechanism. Propagation of the process of solid-phase selective reduction of iron with the powder of carbon-containing material deep into the layer of grains of ilmenite concentrate from the surface of its contact was experimentally studied. The results of determining the amount of metal phase released as it moves away from the concentrate – reducing agent contact boundary are presented. Based on the results concerning amount of precipitated metal phase, a conclusion was made about diffusion processes in a layer of concentrate grains contacting only between themselves, limiting process of iron reduction. It is shown that near the plane of contact of solid reducing agent with the layer of concentrate grains, the rate of iron reduction is higher than the rate of high iron content phase precipitation from ilmenite. In depth of ilmenite concentrate layer, process of iron reduction is preceded by formation of iron-containing silicate phase from concentrate grains, where iron is reduced earlier than in ilmenite grains. Formation of iron-containing silicate phase contributes ilmenite grains sintering. It was concluded that in the concentrate layer in contact with solid reducing agent layer in absence of contact of each ilmenite grain with solid reducing agent, the point contact of grains and presence of voids between them in the layer do not prevent propagation of reduction process in the layer of grains contacting with each other only.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ильменит</kwd><kwd>титаномагнетит</kwd><kwd>предварительное восстановление</kwd><kwd>карботермическое восстановление</kwd><kwd>распространение процесса восстановления</kwd><kwd>металлическая фаза</kwd><kwd>комплексный оксид</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ilmenite</kwd><kwd>titanomagnetite</kwd><kwd>preliminary reduction</kwd><kwd>carbothermal reduction</kwd><kwd>distribution of reduction process</kwd><kwd>metal phase</kwd><kwd>complex oxide</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">Li K.Q., Ni W., Zhu M., Zheng M.J., Li Y. 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