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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ МИСИС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2017-4-21-29</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-556</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>Металлургия цветных металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Metallurgy of Non-Ferrous Metals</subject></subj-group></article-categories><title-group><article-title>ПЕРЕРАБОТКА CЕРЕБРИСТОЙ ПЕНЫ ВАКУУМНОЙ ДИСТИЛЛЯЦИЕЙ</article-title><trans-title-group xml:lang="en"><trans-title>SILVER CRUST PROCESSING BY VACUUM</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>Королев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Korolev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>гл. инженер </p></bio><bio xml:lang="en"><p>Chief еngineer</p></bio><email xlink:type="simple">S.Krauhin@elem.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>Краюхин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Krayukhin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, начальник Исследовательского центра </p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Head of Research center</p></bio><email xlink:type="simple">S.Krauhin@elem.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>Мальцев</surname><given-names>Г. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Maltsev</surname><given-names>G. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>докт. техн. наук, ст. науч. сотр., гл. специалист Исследовательского центра </p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Senior scientific officer, Chief specialist, Research center</p></bio><email xlink:type="simple">mgi@elem.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>Филатов</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Filatov</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>докт. техн. наук, ст. науч. сотр., вед. специалист Исследовательского центра </p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Senior scientific officer, Leading specialist, Research center</p></bio><email xlink:type="simple">e.filatov@ihte.uran.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО «Уралэлектромедь»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC «Uralelectromed»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>05</day><month>09</month><year>2017</year></pub-date><volume>0</volume><issue>4</issue><fpage>21</fpage><lpage>29</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Королев А.А., Краюхин С.А., Мальцев Г.И., Филатов Е.С., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Королев А.А., Краюхин С.А., Мальцев Г.И., Филатов Е.С.</copyright-holder><copyright-holder xml:lang="en">Korolev A.A., Krayukhin S.A., Maltsev G.I., Filatov E.S.</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://cvmet.misis.ru/jour/article/view/556">https://cvmet.misis.ru/jour/article/view/556</self-uri><abstract><p>При очистке от примесей свинец обрабатывают цинком, образующим с драгоценными металлами тугоплавкие интерметаллические не растворимые в основном металле соединения – серебристую пену (СП). Выполнены лабораторные исследования по переработке СП, содержащей, %: 78–80 Pb, 15–17 Zn, 3–5 Ag, 0,0001–0,002 Au, методом вакуумной дистилляции (t = 800÷1200 °С, Р = 10–1÷10–3 мм рт. ст., τ = 2÷42 ч) с целью разделения цинка, свинца и драгоценных металлов. При t ~ 800 °С, Р = 10–1 мм рт. ст. получен цинковый конденсат состава, %: 99,85 Zn, 0,14 Pb. При t ~1000 °С, Р = 9·10–3 мм рт. ст. выделены концентраты цинка-свинца (15,7 Zn, 83,6 Pb, 0,02 Ag), свинца (86–87 Pb, 0,4–2,8 Zn, 0,04–0,12 Ag), серебра (50–67 Ag, 0,1–5,3 Pb, 0,04–0,2 Zn), а при t ~1200 °С, Р = 6,5·10–3 мм рт. ст. – концентраты свинца (91–97 Pb, 0,6–1,7 Zn, 0,01–1,2 Ag) и серебра (92 Ag, 1,4 Pb, 0,1 Zn). Показано, что увеличение глубины вакуума в системе более 0,1 мм рт. ст. не приводит к существенным изменениям показателей процесса вакуумной дистилляции серебристой пены. Количественная возгонка цинка происходит при температуре не более 800 °С в течение 1 ч. Об окончании процесса свидетельствует скачок давления в системе до Р = 1,5÷2,0 мм рт. ст. Ликвация СП с получением чернового свинца (~42 % от исходного количества Pb) и серебристой пены ликвированной (СПЛ) состава, %: 76,39 Pb, 16,56 Zn, 6,254 Ag, возможна в течение 2 ч в атмосфере инертного газа (Ar) при t = 700±10 °С без вакуума. Температура процесса слива свинца составляет 380±10 °С. Количественная возгонка свинца и цинка из СПЛ оптимальна (&gt;99 %) при t £ 1000 °С в течение 12 ч. Одновременно из нее же извлекается ~20 % серебра от исходного количества в СП. Определены значения скорости возгона цинка (800 °С), свинца и серебра (1000 °С), которые составили (расчет/опыт) v·10–4, г/(см2·с): 19,13/24,05 Zn, 6,25/8,6 Pb, 0,0068/0,0065 Ag. Полученные значения v могут быть использованы при проектировании оборудования для вакуумной дистилляции серебристой пены.</p><sec><title> </title><p> </p></sec><sec><title> </title><p> </p></sec></abstract><trans-abstract xml:lang="en"><p>When cleaned from impurities lead is treated with zinc reacting with precious metals to form refractory intermetallics that are not soluble in the base metal – a silver crust (SС). The laboratory studies for processing of SС containing, %: 78–80 Pb; 15–17 Zn; 3–5 Ag; 0,0001–0,002 Au by vacuum distillation (t = 800÷1200 °C, Р = 10–1÷10–3 mm Hg; τ = 2÷42 h) to separate zinc, lead and precious metals. At t ~ 800 °C, Р = 10–1 mm Hg, zinc condensate was obtained containing, %: 99,85 Zn, 0,14 Pb. At t ~1000 °C, Р = 9·10–3 mm Hg, zinc-lead concentrate (15,7 Zn; 83,6 Pb; 0,02 Ag), lead concentrate (86–87 Pb; 0,4–2,8 Zn; 0,04–0,12 Ag), silver concentrate (50–67 Ag; 0,1–5,3 Pb, 0,04–0,2 Zn). At t ~1200 °C, Р = 6,5·10–3 mm Hg, lead concentrate (91–97 Pb, 0,6–1,7 Zn; 0,01–1,2 Ag) and silver concentrate (92 Ag, 1,4 Pb, 0,1 Zn) were obtained. It is shown that the degree of vacuum in the system increased up to over 0,1 mm Hg causes no significant changes in the indicators of silver crust vacuum distillation. Quantitative sublimation of zinc takes place at a temperature not exceeding 800 °C for 1 h. The end of the process is indicated by a pressure surge in the system up to Р = 1,5÷2,0 mm Hg. SC liquation producing crude lead (~42 % of the original quantity of Pb) and liquated silver crust (LSC) containing, %: 76,39 Pb; 16,56 Zn; 6,254 Ag, is possible for 2 h in an inert gas atmosphere (Ar) at t = 700±10 °C without vacuum. Temperature of lead draining is 380±10 °C. Quantitative sublimation of lead and zinc from LSC is optimal (&gt;99 %) at t £ 1000 °C for 12 h, At the same time ~20 % silver of the original quantity in SC is extracted from the composition. Velocities of zinc (800 °C), lead and silver (1000 °C) sublimation are identified (calculation/experience) and equal to v·10–4 g/(cm2·s): 19,13/24,05 Zn; 6,25/8,6 Pb; 0,0068/0,0065 Ag. These v values can be used to design the equipment for vacuum distillation of silver crust.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>серебристая пена</kwd><kwd>вакуумная дистилляция</kwd><kwd>цинк</kwd><kwd>свинец</kwd><kwd>серебро</kwd></kwd-group><kwd-group xml:lang="en"><kwd>silver crust</kwd><kwd>vacuum distillation</kwd><kwd>zinc</kwd><kwd>lead</kwd><kwd>silver</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">Erez B.-Y., V. Yitzhak, Brink Edwin C. M., Ron B. A new Ghassulian metallurgical assemblage from Bet Shemesh (Israel) and the earliest leaded copper in the Levant. J. Archaeolog. Sci.: Reports. 2016. Vol. 9. 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