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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.31897/PMI.2021.3.4</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-14693</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/14693</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Горное дело</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Mining</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Analysis of the screw press mouthpiece parameters for 3D extrusion of peat pieces of tubular type</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Анализ параметров мундштука шнекового пресса для 3D-экструзии торфяных кусков трубчатого типа</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Mikhailov</surname>
            <given-names>Aleksandr V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Михайлов</surname>
              <given-names>А. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Mikhailov</surname>
              <given-names>Aleksandr V.</given-names>
            </name>
          </name-alternatives>
          <email>epc68@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-0516-7737</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint Petersburg Mining University (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Fedorov</surname>
            <given-names>Aleksandr S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Федоров</surname>
              <given-names>А. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Fedorov</surname>
              <given-names>Aleksandr S.</given-names>
            </name>
          </name-alternatives>
          <email>413x4ndr_fd5@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-9300-7353</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint Petersburg Mining University (Saint Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2021-09-20">
        <day>20</day>
        <month>09</month>
        <year>2021</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2021</year>
      </pub-date>
      <volume>249</volume>
      <fpage>351</fpage>
      <lpage>365</lpage>
      <history>
        <date date-type="received" iso-8601-date="2021-02-20">
          <day>20</day>
          <month>02</month>
          <year>2021</year>
        </date>
        <date date-type="accepted" iso-8601-date="2021-05-21">
          <day>21</day>
          <month>05</month>
          <year>2021</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2021-09-20">
          <day>20</day>
          <month>09</month>
          <year>2021</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2021 А. В. Михайлов, А. С. Федоров</copyright-statement>
        <copyright-statement xml:lang="en">© 2021 Aleksandr V. Mikhailov, Aleksandr S. Fedorov</copyright-statement>
        <copyright-year>2021</copyright-year>
        <copyright-holder xml:lang="ru">А. В. Михайлов, А. С. Федоров</copyright-holder>
        <copyright-holder xml:lang="en">Aleksandr V. Mikhailov, Aleksandr S. Fedorov</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/14693">https://pmi.spmi.ru/pmi/article/view/14693</self-uri>
      <abstract xml:lang="ru">
        <p>Приведены результаты теоретических и экспериментальных исследований по созданию составного мундштука шнекового пресса для 3D-формования торфяных кусков трубчатого типа в полевых условиях для интенсификации процесса полевой сушки материала в комплексно механизированном карьере. Основная цель исследования заключалась в обосновании геометрических и конструктивных параметров составного мундштука шнекового пресса стилочной машины по производству торфяной окускованной продукции трубчатого типа. Параметры мундштука выбираются на основе геометрических характеристик торфяных кусков. Увеличение влагоотдачи при сушке торфяной окускованной продукции обеспечивается формованием торфяного куска в форме толстостенной трубы из композита торфяного сырья низкой и высокой степеней разложения в соотношении 1:3. Аддитивное производство торфяных композитов полимер-волокно методом экструзии позволяет изготавливать продукцию с улучшенными механическими свойствами в сравнении с неармированным сырьем. Вертикальное расположение торфяного трубчатого куска на поле для сушки позволяет увеличить загрузку площади поля на 10 %, увеличить конвективный теплоподвод к куску и сократить коэффициент контакта куска с полем в три раза в сравнении со стилкой кусков в виде горизонтальной ленты. На основе проведенного анализа формы и размеров окускованной продукции разработана конструкция составного мундштука шнекового пресса, состоящего из двух условных зон формования различной конфигурации. В статье проведен параметрический анализ объемной производительности шнекового пресса с составным мундштуком трубчатого типа, определена энергоемкость механической переработки, выполнена оценка степени механической переработки торфяного сырья с оптимизацией параметров шнека для производства окускованной продукции трубчатого типа.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The results of theoretical and experimental studies on the creation of a screw press composite mouthpiece screw press for 3D-forming of peat pieces of a tubular type in the field for intensifying the process of field drying of material in a complex mechanized pit are presented. The main purpose of the study was to substantiate the geometric and design parameters of the screw press composite mouthpiece of the spread machine for the production of peat-agglomerated products of the tubular type. The parameters of the mouthpiece are selected based on the geometric characteristics of the peat pieces. An increase in moisture loss during drying of peat-agglomerated products is provided by forming a peat piece in the form of a thick-walled pipe made of a peat raw materials composed of low and high decomposition degrees in a ratio of 1:3. Additive production of polymer-fiber peat composites by extrusion allows to produce products with improved mechanical properties in comparison with non-reinforced raw materials. The vertical arrangement of the peat tubular piece on the drying field allows to increase the loading of the field area by 10 %, increase the convective heat supply to the piece and reduce the contact coefficient of the piece with the field by three times in comparison with the peat spreading of the pieces in the form of a horizontal tape. Based on the analysis of the shape and size of the agglomerated products, the design of a screw press composite mouthpiece consisting of two conditional molding zones of various configurations has been developed. The article presents a parametric analysis of the volumetric productivity of a screw press with a composite mouthpiece of a tubular type, the energy intensity of mechanical processing is determined, the degree of mechanical processing of peat raw materials is estimated with the optimization of the screw parameters for the production of agglomerated products of a tubular type.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>экскавированное торфяное сырье</kwd>
        <kwd>стилочная машина</kwd>
        <kwd>шнековый пресс</kwd>
        <kwd>составной мундштук</kwd>
        <kwd>композит полимер-волокно</kwd>
        <kwd>3D-формование</kwd>
        <kwd>стилка</kwd>
        <kwd>сушка</kwd>
        <kwd>окускованная продукция</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>excavated peat raw materials</kwd>
        <kwd>spread machine</kwd>
        <kwd>screw press</kwd>
        <kwd>composite mouthpiece</kwd>
        <kwd>composite polymer-fiber</kwd>
        <kwd>3D-forming</kwd>
        <kwd>peat spreading</kwd>
        <kwd>drying</kwd>
        <kwd>agglomerated products</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
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