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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">10.17073/0368-0797-2017-2-116-123</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1019</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>МЕТАЛЛУРГИЧЕСКИЕ ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METALLURGICAL TECHNOLOGIES</subject></subj-group></article-categories><title-group><article-title>ИЗМЕНЕНИЕ ЭКВИВАЛЕНТНОЙ ПОРОЗНОСТИ СЛОЯ ОКАТЫШЕЙ ПО ДЛИНЕ ОБЖИГОВОЙ КОНВЕЙЕРНОЙ МАШИНЫ</article-title><trans-title-group xml:lang="en"><trans-title>CHANGE OF EQUIVALENT LAYER POROSITY OF PELLETS ALONG THE LENGTH OF BURNING CONVEYOR MACHINE</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>Юрьев</surname><given-names>Б. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Yur’ev</surname><given-names>B. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры теплофизики и информатики в металлургии</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Physics and Informatics in Metallurgy”</p></bio><email xlink:type="simple">yurev-b@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>Гольцев</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gol’tsev</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры теплофизики и информатики в металлургии</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Physics and Informatics in Metallurgy”</p></bio><email xlink:type="simple">v.a.qoltsev@urfu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уральский федеральный университет имени первого Президента России Б.Н. Ельцина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B.N.  Yeltsin</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>01</day><month>03</month><year>2017</year></pub-date><volume>60</volume><issue>2</issue><fpage>116</fpage><lpage>123</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Юрьев Б.П., Гольцев В.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Юрьев Б.П., Гольцев В.А.</copyright-holder><copyright-holder xml:lang="en">Yur’ev B.P., Gol’tsev V.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/1019">https://fermet.misis.ru/jour/article/view/1019</self-uri><abstract><p>Рассмотрены сложности в определении величины газодинамического сопротивления слоя окатышей в процессе термообработки на обжиговой машине конвейерного типа, связанные со значительными изменениями структуры слоя из-за его усадки в процессе сушки, низкой прочности сырых окатышей, сегрегации по высоте слоя, спекания и оплавления окатышей. В результате газодинамическое сопротивление слоя окатышей на конвейерных машинах значительно превышает величину сопротивления, которую получают при лабораторных исследованиях газодинамики слоя окатышей. Учитывая влияние большого количества факторов на структуру обжигаемого слоя окатышей, учесть которые можно только в их совокупном действии, введено понятие эквивалентной порозности. В результате расчета величины эквивалентной порозности по имеющимся в литературе данным и данным, полученным при отработке технологии обжига окатышей в высоком слое на конвейерных машинах Качканарского ГОКа, выявлена закономерность ее распределения по длине конвейерной машины. Установлено, что наиболее существенно порозность слоя снижается из-за усадки слоя в зоне сушки и растрескивания окатышей на выходе из нее. Проведенный анализ расчетных выражений для определения газодинамических характеристик слоя из окатышей позволил получить зависимости, которые с достаточной степенью точности можно использовать для расчета газодинамических характеристик слоя на конвейерных машинах с учетом различной порозности. Полученные в работе результаты могут быть использованы при определении газодинамических и тепловых режимов, обеспечивающих работу обжиговых конвейерных машин с низкими удельными расходами топлива и высоким качеством обожженного продукта.</p></abstract><trans-abstract xml:lang="en"><p>Difficulties in determining the flow resistance of layer of pellets in the burning conveyor type machines during the heat treatment, associated with significant changes in the layer structure due to its shrinkage during the drying process, the low strength of raw pellets, adjustment layer segregation, sintering and melting of pellets, were considered. As a result, flow resistance of pellets layer on conveyor machines greatly exceeds the resistance value which is obtained in laboratory tests of gas dynamics of pellet layer. According to the impact of many factors on the structure of a burnt pellets layer, which can be taken into account only in their cumulative effect, the authors have introduced the concept of an equivalent porosity. As a result of calculating the amount of equivalent porosity with the available literature data and the data obtained in working out the pellets burning technology in a high layer on Kachkanar conveyor machines, a pattern of its distribution along the length of the conveyor machine was revealed. It was established that most significantly the porosity of the layer reduce due to layer shrinkage in the drying zone and cracking of pellets at the outlet of it. The analysis of estimated expressions to determine the gas-dynamic characteristics of the pellets layer helped to get the dependencies that with a sufficient degree of accuracy can be used to calculate the gas-dynamic characteristics of the layer on the conveyor machines considering different porosity. The obtained results can be used in determining the gas dynamic and thermal conditions, providing work of burning conveyor machines with low specific fuel consumption and high quality of the calcined product.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коэффициент газодинамического сопротивления</kwd><kwd>эквивалентная порозность</kwd><kwd>железорудные окатыши</kwd><kwd>режим</kwd><kwd>обжиговая конвейерная машина</kwd><kwd>зона</kwd><kwd>термическая обработка</kwd><kwd>параметры</kwd><kwd>расход топлива</kwd><kwd>качество</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Government of the Russian Federation (Act 211</kwd><kwd>contract no. 02.А03.21.0006)</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Правительство Российской Федерации (постановление №  211, контракт №  02.А03.21.0006)</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">Liu H., Jonsson L. 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