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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 custom-type="edn" pub-id-type="custom">RWLRDI</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-16511</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/16511</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геотехнология и инженерная геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geotechnical Engineering and Engineering Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Impact of dry and wet magnetic separator process parameters on iron oxide removal from Egyptian feldspar ore</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Влияние параметров сухого и мокрого магнитного обогащения на удаление оксида железа из египетской полевошпатовой руды</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Yassin</surname>
            <given-names>Khaled E.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Ясин</surname>
              <given-names>Халед Э.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Yassin</surname>
              <given-names>Khaled E.</given-names>
            </name>
          </name-alternatives>
          <email>khaled_yassin@yahoo.com</email>
          <contrib-id contrib-id-type="orcid">0000-0001-9807-3184</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Центральный металлургический научно-исследовательский и опытно-конструкторский институт (Хелуан, Египет)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Central Metallurgical Research and Development Institute (Helwan, Egypt)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>El-Sayed</surname>
            <given-names>Hassan R.E.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Эль-Сайед</surname>
              <given-names>Хассан Р.Э.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>El-Sayed</surname>
              <given-names>Hassan R.E.</given-names>
            </name>
          </name-alternatives>
          <email>prof_s_elsaidy@yahoo.com</email>
          <contrib-id contrib-id-type="orcid">0000-0003-4561-6696</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
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          <aff>
            <institution xml:lang="ru">Центральный металлургический научно-исследовательский и опытно-конструкторский институт (Хелуан, Египет)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Central Metallurgical Research and Development Institute (Helwan, Egypt)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Elbendari</surname>
            <given-names>Abdalla M.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Эльбендари</surname>
              <given-names>Абдалла М.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Elbendari</surname>
              <given-names>Abdalla M.</given-names>
            </name>
          </name-alternatives>
          <email>Abdullah_elbendary@yahoo.com</email>
          <contrib-id contrib-id-type="orcid">0000-0003-1882-7885</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Центральный металлургический научно-исследовательский и опытно-конструкторский институт (Хелуан, Египет)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Central Metallurgical Research and Development Institute (Helwan, Egypt)</institution>
          </aff>
        </aff-alternatives>
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      <pub-date pub-type="epub" iso-8601-date="2025-04-04">
        <day>04</day>
        <month>04</month>
        <year>2025</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2025</year>
      </pub-date>
      <volume>274</volume>
      <fpage>154</fpage>
      <lpage>166</lpage>
      <history>
        <date date-type="received" iso-8601-date="2024-06-04">
          <day>04</day>
          <month>06</month>
          <year>2024</year>
        </date>
        <date date-type="accepted" iso-8601-date="2025-01-28">
          <day>28</day>
          <month>01</month>
          <year>2025</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2025-08-25">
          <day>25</day>
          <month>08</month>
          <year>2025</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2025 Халед Э. Ясин, Хассан Р.Э. Эль-Сайед, Абдалла М. Эльбендари</copyright-statement>
        <copyright-statement xml:lang="en">© 2025 Khaled E. Yassin, Hassan R.E. El-Sayed, Abdalla M. Elbendari</copyright-statement>
        <copyright-year>2025</copyright-year>
        <copyright-holder xml:lang="ru">Халед Э. Ясин, Хассан Р.Э. Эль-Сайед, Абдалла М. Эльбендари</copyright-holder>
        <copyright-holder xml:lang="en">Khaled E. Yassin, Hassan R.E. El-Sayed, Abdalla M. Elbendari</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/16511">https://pmi.spmi.ru/pmi/article/view/16511</self-uri>
      <abstract xml:lang="ru">
        <p>Спрос на полевой шпат в качестве сырья для производства керамических изделий постоянно растет. Полевой шпат широко распространен в земной коре и обычно встречается вместе с другими силикатными минералами, а также оксидами титана и железа. В статье исследуются пути снижения содержания оксида железа в полевошпатовой руде из региона Вади-Зириб и достижения оптимального сорта полевошпатового концентрата для применения в промышленности. Исследование включало методы сухого и мокрого магнитного обогащения с последующим выщелачиванием щавелевой и лимонной кислотами для минимизации примесей железа и улучшения оптических свойств. Факторы, влияющие на сухое магнитное обогащение, для фракции полевого шпата –250+45 мкм оптимизированы с использованием факторного плана Бокса – Бенкена. Получен немагнитный концентрат с 0,29 % Fe2O3 и выходом полевого шпата 92,19 %. Оптимизировано мокрое магнитное обогащение для мелких фракций полевого шпата –45 мкм и получен концентрат с содержанием Fe2O3 0,27 %. Кислотное выщелачивание немагнитных полевошпатовых концентратов с применением щавелевой кислоты оказалось более эффективным для снижения содержания оксида железа в сухих (до 0,19 %) и влажных (до 0,12 %) немагнитных полевошпатовых концентратах. Оптические свойства выщелоченных концентратов по сравнению с исходным образцом были улучшены, поскольку белизна повысилась до 90 %.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The demand for feldspar as a raw material in the ceramic industry is continuously increasing. Feldspar is abundant in the Earth's crust and typically found alongside other silicate minerals, as well as titanium and iron oxides. This study aims to reduce the iron oxide content in feldspar ore from the Wadi Zirib region and achieve an optimal grade of feldspar concentrate for various industrial uses. The research involved dry and wet magnetic separation techniques followed by leaching with oxalic and citric acids to minimize iron impurities and enhance optical properties. The factors affecting the dry magnetic separation, for feldspar size of –250+45 µm, were optimized using the Box – Behnken factorial design and a non-magnetic concentrate with 0.29 % Fe2O3 and an 92.19 % feldspar yield was obtained. The wet magnetic separation for feldspar fines of size –45 µm was optimized and a concentrate with 0.27 % Fe2O3 was achieved. The acid leaching was conducted on the non-magnetic feldspar concentrates using oxalic and citric acid. Oxalic acid was more successful in reducing iron oxide of dry (to 0.19 %) and wet (to 0.12 %) non-magnetic feldspar concentrates. The optical properties of the leached concentrates were improved compared to the original sample, as the whiteness improved up to 90 %.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>Вади-Зириб</kwd>
        <kwd>роликовый магнитный сепаратор</kwd>
        <kwd>мокрый магнитный сепаратор с высокой интенсивностью магнитного поля</kwd>
        <kwd>кислотное выщелачивание</kwd>
        <kwd>щавелевая кислота</kwd>
        <kwd>лимонная кислота</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>Wadi Zirib</kwd>
        <kwd>roll magnetic separator</kwd>
        <kwd>wet high intensity magnetic separator</kwd>
        <kwd>acid leaching</kwd>
        <kwd>oxalic acid</kwd>
        <kwd>citric acid</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">Исследование выполнено при поддержке Управления по финансированию науки, технологий и инноваций Министерства высшего образования и научных исследований Египта, грант № 45915.</funding-statement>
        <funding-statement xml:lang="en">The research was conducted with support of the Science, Technology and Innovation Funding Authority, Ministry of Higher Education and Scientific Research, Egypt, grant N 45915.</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body/>
  <back>
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