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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">10.17073/0368-0797-2020-10-815-822</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1996</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>Этапы совершенствования сварных конструкций пятисопловых фурменных головок в конвертерном цехе ПАО «Днепровский металлургический комбинат»</article-title><trans-title-group xml:lang="en"><trans-title>Development of welded structure of 5-nozzle lance heads in converter shop of PJSC “Dneprovsky metallurgical combine”</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>Пантейков</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Panteikov</surname><given-names>S. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент кафедры металлургии черных металлов</p><p>51918, Украина, Днепропетровская обл., Каменское, Днепростроевская ул., 2</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair of Ferrous Metallurgy</p><p>Dnipropetrovsk Region</p></bio><email xlink:type="simple">ser_pant_in@ukr.net</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Днепровский государственный технический университет</institution><country>Украина</country></aff><aff xml:lang="en"><institution>Dniprovsk State Technical University</institution><country>Ukraine</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>10</day><month>12</month><year>2020</year></pub-date><volume>63</volume><issue>10</issue><fpage>815</fpage><lpage>822</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пантейков С.П., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Пантейков С.П.</copyright-holder><copyright-holder xml:lang="en">Panteikov S.P.</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/1996">https://fermet.misis.ru/jour/article/view/1996</self-uri><abstract><p>Для верхних дутьевых фурм 250-т кислородных конвертеров ПАО «Днепровский металлургический комбинат» предложен ряд сварных конструкций пятисопловых фурменных головок с повышенной стойкостью. Проведенный комплекс промышленных исследований их работы позволил установить, что наибольшей стойкостью обладают устройства, в которых предусмотрено охлаждение зон засоплового пространства наконечника. Достаточно действенными также оказались меры по повышению значений средних скоростей охладителя в сварных конструкциях фурменных головок и увеличению их жесткости. Перенос сварочных швов из меди, удерживающих сопловые вкладыши в медном наконечнике, с его наружной поверхности на внутреннюю оказался неэффективным с точки зрения повышения стойкости фурменной головки. Средняя стойкость головок увеличилась всего на семь плавок – с 78 до 85. Это позволяет утверждать о необходимости полного устранения в головке сварочных швов из меди (как наружных, подвергающихся высокотемпературному и механическому воздействию, так и внутренних), удерживающих сопловые вкладыши в отверстиях сварных наконечника и коллектора фурменной головки. Таким образом, все проведенные мероприятия (перенос сварочных швов с наружной поверхности наконечника на его внутреннюю поверхность, улучшение охлаждения наконечника и его засопловых зон, в которые попадают также участки медных сварочных швов вокруг сопел, а также повышение жесткости сварной конструкции дутьевой головки) привели хоть и к положительным, но сравнительно невысоким результатам. Полученные данные свидетельствуют о том, что сварочные швы, выполненные из меди вокруг сопловых вкладышей, которые удерживаются за счет этого в наконечнике (также и в коллекторе) головки, являются тем лимитирующим звеном, которое не дает значительно поднять стойкость сварных фурменных головок, от использования которых необходимо срочно отказаться.</p></abstract><trans-abstract xml:lang="en"><p>For the upper blasting lances of 250-tons oxygen converters at PJSC «DMС» (Kamenskoe, Ukraine) the author has proposed a number of welded structures of 5-nozzle lance heads with increased resistance. A set of industrial studies of their operation made it possible to establish that the devices which provide cooling of the areas back from the nozzle zone of the tip have the highest resistance. Measures to increase the values of the average cooler speeds in welded structures of the lance heads and their rigidity also turned out to be quite effective. The transfer of copper welds holding the nozzle inserts in the copper tip from its outer surface to the inner proved to be ineffective from the point of increasing resistance of the lance head (the average resistance of the heads increased by only 7 heats – from 78 to 85 heats). This allows us to assert the need for complete elimination of copper welds in the head (both external, exposed to high-temperature and mechanical stresses, and internal) that hold nozzle inserts in the holes of the welded tip and lance head collector. Thus, in spite of all the measures taken to transfer the welds from the outer surface of the tip to its inner surface, to improve cooling of the tip and its back from the nozzle zones, which also include sections of copper welds around the nozzles, as well as to increase the rigidity of the blast welded structure heads, this led, although to positive, but still to relatively low results. The data obtained indicate that welds made of copper around the nozzle inserts, which are held by this in the tip (also in the collector) of the head, are the limiting link that does not significantly increase the resistance of welded lance heads, and it is urgently necessary to back off its use.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>фурменная головка</kwd><kwd>стойкость</kwd><kwd>верхняя фурма</kwd><kwd>сопловый вкладыш</kwd><kwd>наконечник</kwd><kwd>коллектор</kwd><kwd>сварочный шов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>lance head</kwd><kwd>resistance</kwd><kwd>top lance</kwd><kwd>nozzle insert</kwd><kwd>tip</kwd><kwd>collector</kwd><kwd>weld</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">Ming L. Rong Z. Research on coherent jet oxygen lance in BOF steelmaking process // Metallurgical Research &amp; Technology. 2019. Vol. 116. No. 5. 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(In Russ.).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
