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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">10.17073/0368-0797-2021-5-360-362</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2104</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>К термодинамике восстановления железа из оксидов</article-title><trans-title-group xml:lang="en"><trans-title>On thermodynamics of iron reduction from oxides</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>Бердников</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Berdnikov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Иванович Бердников, кандидат технических наук, доцент, старший научный сотрудник</p><p>454018, Челябинск, ул. Косарева, 63, офис 486</p></bio><bio xml:lang="en"><p>Viktor I. Berdnikov, Cand. Sci. (Eng.), Assist. Prof., Senior Researcher</p><p>63 Kosareva Str., Chelyabinsk 454018</p></bio><email xlink:type="simple">berdnikov-chel@mail.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>Гудим</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gudim</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Александрович Гудим, доктор технических наук, профессор</p><p>454080, Челябинск, пр. Ленина, 76</p></bio><bio xml:lang="en"><p>Yurii A. Gudim, Dr. Sci. (Eng.), Prof.</p><p>76 Lenina Ave., Chelyabinsk 454080</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО Промышленная компания «Технология металлов»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>LLC Industrial Company “Technology of Metals”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><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>2021</year></pub-date><pub-date pub-type="epub"><day>03</day><month>06</month><year>2021</year></pub-date><volume>64</volume><issue>5</issue><fpage>360</fpage><lpage>362</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бердников В.И., Гудим Ю.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Бердников В.И., Гудим Ю.А.</copyright-holder><copyright-holder xml:lang="en">Berdnikov V.I., Gudim Y.A.</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/2104">https://fermet.misis.ru/jour/article/view/2104</self-uri><abstract><p>Выполнено компьютерное моделирование химического процесса прямого восстановления железа в агрегатах, работающих по технологии «Мидрекс». Проведен анализ четырех вариантов такой технологии, различающихся типом исходного сырья и температурой рабочего процесса. Установлено, что при повышении температуры процесса снижается потребный расход природного газа и полностью устраняется метан в отходящем газе. Также отмечено, что при постоянной температуре процесса концентрации всех компонентов системы находятся в линейной зависимости от величины расхода восстановительного газа. Это обстоятельство позволило записать единое балансовое уравнение для всех вариантов изучаемого химического процесса.</p></abstract><trans-abstract xml:lang="en"><p>A computer simulation of the chemical process of direct iron reduction in aggregates was performed with the use of MIDREX technology. The analysis of four variants of this technology, which differ in the type of raw material and temperature of the working process, was carried out. It was determined that when the process temperature increased, the required consumption of natural gas decreased, and methane in the waste gas was completely eliminated. It was also noted that at a constant process temperature, the concentrations of all components of the system were linearly dependent on flow rate of the reducing gas. This circumstance allowed us to write a single balance equation for all variants of the studied chemical process.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>химические реакции</kwd><kwd>оксиды железа</kwd><kwd>термодинамическая система</kwd><kwd>моделирование процесса</kwd><kwd>прямое восстановление железа</kwd><kwd>Мидрекс-процесс</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chemical reactions</kwd><kwd>iron oxides</kwd><kwd>thermodynamic system</kwd><kwd>process modeling</kwd><kwd>direct reduction of iron</kwd><kwd>MIDREX process</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">Ünal H., Turgut E., Atapek S., Alkan A. Direct reduction of ferrous oxides to form an iron-rich alternative charge material // High Temperature Materials and Processes. 2015. Vol. 34. No. 8. 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