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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">10.17073/0368-0797-2020-2-122-128</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1853</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>Термодинамическое моделирование силикотермического процесса восстановления хрома</article-title><trans-title-group xml:lang="en"><trans-title>Thermodynamic simulation of silicothermic chromium reduction process</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>Салина</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Salina</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., старший научный сотрудник</p><p>620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Senior Researcher</p><p>Ekaterinburg</p></bio><email xlink:type="simple">valentina_salina@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>Жучков</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhuchkov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор, главный научный сотрудник</p><p>620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Chief Researcher</p><p>Ekaterinburg</p></bio><email xlink:type="simple">ntm2000@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>Заякин</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zayakin</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., заведующий лабораторией стали и ферросплавов</p><p>620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Head of the Laboratory of Steel and Ferroalloys</p><p>Ekaterinburg</p></bio><email xlink:type="simple">zferro@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт металлургии УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Metallurgy, UB RAS</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>122</fpage><lpage>128</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Салина В.А., Жучков В.И., Заякин О.В., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Салина В.А., Жучков В.И., Заякин О.В.</copyright-holder><copyright-holder xml:lang="en">Salina V.A., Zhuchkov V.I., Zayakin O.V.</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/1853">https://fermet.misis.ru/jour/article/view/1853</self-uri><abstract><p>Проведено термодинамическое моделирование процесса восстановления хрома из оксидной системы состава, % (по массе): 25,0 – 37,5 CaO, 25,0 – 12,5 SiO2 , 25 Cr2O3 , 5 FeO, 14 MgO, 3 MnO, 3 Al2O3 . В качестве восстановителя использовали кремний ферросилиция марок ФС20, ФС45, ФС65, количество которого составило 110 % 2 от стехиометрически необходимого для восстановления железа, марганца и хрома. Для моделирования использовали программный комплекс HSC Chemistry 6.12, разработанный Outokumpu (Финляндия). Расчеты выполнены с применением модуля «Equilibrium Compositions» в исходной среде азота при общем давлении 0,1 МПа в интервале температур 1500 – 1700 °С с шагом 50 °С. В базу данных программного комплекса введены термодинамические характеристики химического соединения CrO (II). Скорректированы существующие в базе данных термодинамические константы соединения CaCr2O4 . Результаты расчетов представлены в виде графических зависимостей изменения степени восстановления хрома η Cr от температуры t, основности шлака (СаО)/(SiO2) и концентрации кремния в ферросилиции [Si]ФС. Показано, что повышение температуры процесса от 1500 до 1700 °С при (СаО)/(SiO2) = 2 снижает ηCr при применении восстановителя ФС20, ФС45 и ФС65 на 1,87, 6,04 и 7,38 % соответственно. Установлено, что увеличение (СаО)/(SiO2) от 1 до 3 при t = 1600 °С приводит кФС повышению ηCr на 17,3, 14,2 и 12,5 % при использовании ФС20, ФС45 и ФС65 соответственно. Повышение концентрации кремния от 20 до 65 % в ферросилиции [Si]ФС способствует увеличению ηCr на 9,5, 5,9 и 4,2 % при основности шлака, равной 1, 2 и 3 соответственно и температуре 1600 °С. Определен химический состав металла. Результаты термодинамического моделирования могут быть использованы для расчета степени восстановления хрома из шлаков восстановительного периода процесса аргоно-кислородного рафинирования при получении нержавеющей стали.</p></abstract><trans-abstract xml:lang="en"><p>Thermodynamic modeling of chromium reduction from the oxide system of the following composition was carried out, (wt %): 25.0 – 37.5 CaO, 25.0 – 12.5 SiO2 , 25 CrO3 , 5 FeO; 14 MgO, 3 MnO, 3 Al2O3 . Silicon of ferrosilicon of FeSi20, FeSi45, FeSi65 grades was used as a reducing agent in amount of 110 % of stoichiometrically needed for iron, manganese and chromium reduction. Modeling was performed on HSC Chemistry 6.12 software package developed by Outokumpu (Finland). Calculations were performed using “Equilibrium Compositions” module in the initial nitrogen medium at total pressure of 0.1 MPa and in temperature range of 1500 – 1700 °С with step of 50 °С. The thermodynamic characteristics of chemical compound CrO (II) was introduced into the database. Thermodynamic constants of CaCr2O4 compound presented in a database have been adjusted. Calculation results were presented in form of graphic dependences of change in degree of chromium reduction ηCr on temperature t, slag basicity (CaO)/(SiO2), and silicon concentration in ferrosilicon [Si]FeSi . It was shown that increase in the process temperature from 1500 to 1700 °C at (CaO)/(SiO2) = 2 reduces ηCr by 1.87, 6.04 and 7.38 % when using FeSi20, FeSi45 and FeSi65 reducing agents respectively. It was found that increase in (CaO)/(SiO2) from 1 to 3 at temperature of 1600 °C leads to an increase of ηCr 2 by 17.3, 14.2 and 12.5 % using FeSi20, FeSi45, and FeSi65 respectively. Increase in silicon concentration from 20 to 65 % in [Si]FeSi ferrosilicon facilitates an increase of ηCr by 9.5, 5.9 and 4.2 % at slag basicity of 1, 2 and 3 respectively and at temperature of 1600 °C. Chemical composition of metal was determined. Results of thermodynamic modeling can be used to calculate degree of chromium reduction from recovery period slags of the argon-oxygen refining process in stainless steel production.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>термодинамическое моделирование</kwd><kwd>оксидная система</kwd><kwd>восстановление</kwd><kwd>температура</kwd><kwd>основность шлака</kwd><kwd>ферросилиций</kwd><kwd>состав металла</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermodynamic simulation</kwd><kwd>oxide system</kwd><kwd>reduction</kwd><kwd>temperature</kwd><kwd>slag basicity</kwd><kwd>ferrosilicon</kwd><kwd>metal composition</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена по Государственному заданию ИМЕТ УрО РАН и по проекту № 18-5-2345-56 Комплексной программы Уральского отделения РАН.</funding-statement><funding-statement xml:lang="en">The work was performed according to the state assignment for IMET UB RAS and under the project No. 18-5-2345-56 of the Comprehensive Program of Ural Branch of RAS.</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">Неменов А.М. 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