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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">firesmi</journal-id><journal-title-group><journal-title xml:lang="ru">Пожаровзрывобезопасность/Fire and Explosion Safety</journal-title><trans-title-group xml:lang="en"><trans-title>Pozharovzryvobezopasnost/Fire and Explosion Safety</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-7493</issn><issn pub-type="epub">2587-6201</issn><publisher><publisher-name>ФГБОУ ВО «Национальный исследовательский Московский государственный строительный университет»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/0869-7493.2024.33.04.5-12</article-id><article-id custom-type="elpub" pub-id-type="custom">firesmi-1402</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>ПРОЦЕССЫ ГОРЕНИЯ, ДЕТОНАЦИИ И ВЗРЫВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COMBUSTION, DETONATION AND EXPLOSION PROCESSES</subject></subj-group></article-categories><title-group><article-title>Исследование взрывоопасности аэровзвеси свинца</article-title><trans-title-group xml:lang="en"><trans-title>Explosion hazard study of lead dust/air mixture</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2586-8597</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полетаев</surname><given-names>Н. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Poletaev</surname><given-names>N. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ПОЛЕТАЕВ Николай Львович, д-р техн. наук, ведущий научный сотрудник</p><p>143903, Московская обл., г. Балашиха, мкр. ВНИИПО, 12</p><p>РИНЦ AuthorID: 1093620</p></bio><bio xml:lang="en"><p>Nikolay L. POLETAEV, Dr. Sci. (Eng.), Leading Researcher</p><p>VNIIPO, 12, Balashikha, Moscow Region, 143903</p><p>RSCI AuthorID: 1093620</p></bio><email xlink:type="simple">nlpvniipo@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9000-7115</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сазонов</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sazonov</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>САЗОНОВ Михаил Сергеевич, кандидат техн. наук, старший научный сотрудник</p><p>650002, Кемеровская область — Кузбасс, Кемеровский г.о., г. Кемерово, ул. Институтская, 3, помещ. 1</p><p>РИНЦ AuthorID: 543411</p></bio><bio xml:lang="en"><p>Mikhail S. SAZONOV, Cand. Sci. (Eng.), Senior Researcher</p><p>Institutskaya, 3, room 1, Kemerovo, Kemerovo Region — Kuzbass, 650002</p><p>RSCI AuthorID: 543411</p></bio><email xlink:type="simple">m.sazonov@nc-vostnii.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-3812-9747</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коптев</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Koptev</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>КОПТЕВ Михаил Юрьевич, и.о. заведующего лабораторией борьбы с пылью и пылевзрывозащиты</p><p>650002, Кемеровская область — Кузбасс, Кемеровский г.о., г. Кемерово, ул. Институтская, 3, помещ. 1</p><p>РИНЦ AuthorID: 893607</p></bio><bio xml:lang="en"><p>Mikhail Yu. KOPTEV, Senior Researcher</p><p>Institutskaya, 3, room 1, Kemerovo, Kemerovo Region — Kuzbass, 650002</p><p>RSCI AuthorID: 893607</p></bio><email xlink:type="simple">m.koptev@nc-vostnii.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский ордена «Знак Почета» научно-исследовательский институт противопожарной обороны Министерства Российской Федерации по делам гражданской обороны, чрезвычайным ситуациям и ликвидации последствий стихийных бедствий</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute for Fire Protection of Ministry of Russian Federation for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Акционерное общество «Научный центр ВостНИИ по промышленной и экологической безопасности в горной отрасли»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Joint-Stock Company “Scientific Center of VOSTNII on Industrial and Environmental Safety in the Mining Industry”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>08</month><year>2024</year></pub-date><volume>33</volume><issue>4</issue><fpage>5</fpage><lpage>12</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Полетаев Н.Л., Сазонов М.С., Коптев М.Ю., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Полетаев Н.Л., Сазонов М.С., Коптев М.Ю.</copyright-holder><copyright-holder xml:lang="en">Poletaev N.L., Sazonov M.S., Koptev M.Y.</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://www.fire-smi.ru/jour/article/view/1402">https://www.fire-smi.ru/jour/article/view/1402</self-uri><abstract><sec><title>Введение</title><p>Введение. Пыль свинца в состоянии аэровзвеси имеет температуру самовоспламенения 710 °С и расчетное максимальное избыточное давление взрыва 400 кПа. В то же время аэровзвесь свинцовой пыли не взрывается при тестировании в 20-л камере с источником зажигания, имеющим энергию 2,5 кДж. Данные обстоятельства затрудняют ответ на вопрос о взрывоопасности свинцовой пыли в нормальных условиях обращения. В настоящей работе получены аргументы в пользу взрывобезопасности этой пыли при температуре 25 °С.</p><p>Свинцовая пыль и метод ее исследования. Пыль свинцового концентрата (d50 = 8,5 мкм, d90 = 36,6 мкм) с содержанием свинца не менее 99 % (масс.) исследована в 20-л взрывной камере Сивека с источником зажигания повышенной энергии (10 кДж).</p></sec><sec><title>Результаты</title><p>Результаты. Взрывоопасность свинцовой пыли проявилась в диапазоне концентраций пыли от нижнего предела (500 г/м3) до верхнего предела (1500 г/м3). Во всем указанном диапазоне появление взрыва свинцовой пыли от опыта к опыту носило случайный характер. Максимальное избыточное давление взрыва составило ≈ 150 кПа, индекс взрыва Kst ≈ 2 бар ∙ м/с. В опытах со взрывом пыли восходящая ветвь зависимости давления в камере P от времени t имела две точки перегиба, в первой из которых достигался минимум, а во второй — максимум производной dP/dt.</p></sec><sec><title>Обсуждение и выводы</title><p>Обсуждение и выводы. Результаты исследования свинцовой пыли имеют особенности, характерные для дисперсного материала, взрывобезопасного при нормальных условиях обращения: Kst &lt; 45 бар ∙ м/с (Proust, Accorsi, Dupont, 2007); случайный характер проявления взрывоопасности в широком диапазоне концент­раций пыли и двухэтапный характер развития взрыва (Полетаев, Сазонов, Коптев, 2024). Таким образом, вероятнее всего, исследованная пыль свинца взрывобезопасна. Наблюдение случаев ее взрыва обусловлено эффектом «overdrive» — предварительным нагревом аэровзвеси в опытах с использованием энерго­емкого источника зажигания.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Lead dust/air mixture has an ignition temperature of 710 °C and an estimated maximum explosion pressure of 400 kPa. At the same time, the lead dust/air mixture does not explode in a 20-litre chamber with an ignition source having energy of 2.5 kJ. These circumstances make it difficult to answer the question about the explosiveness of lead dust under normal handling conditions. In this paper, arguments in favour of explosion safety of this dust at a temperature of 25 °C are obtained.</p><p>Lead dust and method of its study. Lead concentrate dust (d50 = 8.5 microns, d90 = 36.6 microns) with lead content of at least 99 % (wt.) was studied in a 20-liter Sivek explosion chamber with an ignition source of increased energy (10 kJ).</p></sec><sec><title>Results</title><p>Results. The explosion hazard of lead dust was manifested in the range of dust concentrations from the lower limit (500 g/m3) to the upper limit (1,500 g/m3). In the whole specified range, the occurrence of lead dust explosion from experiment to experiment was random. The maximum explosion pressure was 150 kPa, the explosion index Kst was 2 bar ∙ m/s. The explosion pressure dependence on time P(t) had two inflection points, in the first of which the minimum dP/dt was reached, and in the second point the maximum dP/dt was reached.</p><p>Discussion and conclusions. The results of the study of lead dust have features characteristic of a dispersed material that is explosion-proof under normal handling conditions: Kst &lt; 45 bar ∙ m/s (Proust, Accorsi, Dupont, 2007); the random nature of the explosion in a wide range of dust concentrations and the two-stage explosion (Poletaev, Sazonov, Koptev, 2024). Thus, it is most likely that the investigated lead dust is explosion-proof. The cases of its explosion are due to the “overdrive” effect — airborne dust preheating in experiments using an energy-intensive ignition source.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>пыль свинца</kwd><kwd>взрыв</kwd><kwd>20-л камера Сивека</kwd><kwd>признаки перегрева</kwd><kwd>температура самовоспламенения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>lead dust</kwd><kwd>explosion</kwd><kwd>20-L Sivek chamber</kwd><kwd>overheating marks</kwd><kwd>ignition temperature</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">Jacobson M., Cooper A.R., Nagy J. Explosibility of metal powders. US Bureau of Mines. Report of investigations 6516. 1962. 25 p.</mixed-citation><mixed-citation xml:lang="en">Jacobson M., Cooper A.R., Nagy J. Explosibility of Metal Powders. US Bureau of Mines. 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DOI: 10.1002/prs.12249</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>
