ipolytechiPolytech JournaliPolytech Journal2782-40042782-6341Irkutsk National Research Technical University10.21285/1814-3520-2022-2-336-347ipolytech-611Research ArticleМЕТАЛЛУРГИЯMETALLURGYФазовые равновесия в системе Hg–Al при вакуумной дистилляцииPhase equilibria in Hg-Al system during vacuum distillationhttps://orcid.org/0000-0002-0338-9774КоролевА. А.KorolevA. A.

Алексей Анатольевич Королев, кандидат технических наук, главный инженер

624091

Успенский просп., 1

Верхняя Пышма

Aleksey A. Korolev, Cand. Sci. (Eng.), Chief Engineer

624091

1, Uspensky Ave.

Verkhnyaya Pyshma

A.Korolev@elem.ruhttps://orcid.org/0000-0001-5265-1006ШунинВ. А.ShuninV. A.

Владимир Александрович Шунин, заместитель начальника

Исследовательский центр

624091

Успенский просп., 1

Верхняя Пышма

Vladimir A. Shunin, Deputy Head

Research Center

624091

1, Uspensky Ave.

Verkhnyaya Pyshma

V.Shunin@elem.ruhttps://orcid.org/0000-0002-9525-6476ТимофеевК. Л.TimofeevK. L.

Константин Леонидович Тимофеев, доктор технических наук, доцент, начальник технического отдела

624091

Успенский просп., 1

Верхняя Пышма

Konstantin L. Timofeev, Dr. Sci. (Eng.), Associate Professor

Department of Metallurgy

624091

1, Uspensky Ave.

Verkhnyaya Pyshma

K.Timofeev@elem.ruhttps://orcid.org/0000-0002-0750-0070МальцевГ. И.MaltsevG. I.

Геннадий Иванович Мальцев, доктор технических наук, старший научный сотрудник, главный специалист

624091

Успенский просп., 1

Gennady I. Maltsev, Dr. Sci. (Eng.), Senior Researcher, Chief Specialist 

624091

1, Uspensky Ave.

Verkhnyaya Pyshma

mgi@elem.ruhttps://orcid.org/0000-0001-6697-1596ВоинковР. С.VoinkovR. S.

Роман Сергеевич Воинков, кандидат технических наук, начальник

Исследовательский центр

624091

Успенский просп., 1

Верхняя Пышма

Roman S. Voinkov, Cand. Sci. (Eng.), Head

Research Center

624091

1, Uspensky Ave.

Verkhnyaya Pyshma

R.Voinkov@elem.ruАкционерное общество «Уралэлектромедь»РоссияJSC “Uralelectromed”Russian FederationАкционерное общество «Уралэлектромедь»; Технический университет Уральской горно-металлургической компанииРоссияJSC “Uralelectromed”; Technical University of the Ural Mining and Metallurgical CompanyRussian Federation202206072022262336347Copyright © Королев А.А., Шунин В.А., Тимофеев К.Л., Мальцев Г.И., Воинков Р.С., 20222022Королев А.А., Шунин В.А., Тимофеев К.Л., Мальцев Г.И., Воинков Р.С.Korolev A.A., Shunin V.A., Timofeev K.L., Maltsev G.I., Voinkov R.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ipolytech.elpub.ru/jour/article/view/611

   Целью работы является расчет равновесных состояний «газ–жидкость», включая зависимости состава фаз от температуры (Т-х) и давления (Р-х) для Hg–Al сплава при вакуумной перегонке. Объектами исследования являлись Hg–Al сплавы состава, моль %: 20–80 Hg; 80–20 Al, образование которых возможно в процессе переработки медеэлектролитного шлама при получении товарного концентрата  селена. Для расчета коэффициентов активности компонентов Hg–Al сплава использована упрощенная версия объемной модели молекулярного взаимодействия типа simple мolecular interaction volume model. Для предварительного выбора температуры и давления системы, оценки эффективности разделения компонентов используют фазовые диаграммы температуры (Т-х) и давления (Р-х). Новизна выполненных исследований обусловлена расчетом коэффициентов активности с использованием выбранной упрощенной версии модели. В интервале температур 823–1073 К рассчитаны давления насыщенного пара для Hg (p*Hg) и Al (p*Al). Высокие значения соотношения p*Hg / p*Al ≥ 3 . 1010 и коэффициента разделения logβHg ≥ 10 создают теоретические предпосылки для селективного выделения этих металлов вакуумной дистилляцией, когда ртуть концентрируется в газовой фазе (βHg > 1), а алюминий – в жидкой. Для границы раздела фаз «жидкость–газ» Hg-Al сплава определены значения изменения энергии Гиббса, энтальпии и энтропии: ΔGE/m = 1–3 кДж/моль; +-ΔGE/m = 0,03–0,17 Дж/моль. К. Практическая значимость состоит в сокращении количества установочных опытов при переработке Hg–Al композиций для оптимизации значений температуры и давления процесса вакуумной дистилляции.

   In this work, gas-liquid equilibrium states are calculated, including phase composition dependences on temperature (T-x) and pressure (P-x) for the Hg-Al alloy during vacuum distillation. The objects of research comprised Hg-Al alloys having the following composition, mole %: 20–80 Hg; 80–20 Al, whose formation may occur during the processing of copper anode slime upon producing commercial selenium concentrate. A simplified molecular interaction volume model was used to calculate the activity coefficients of the components in the Hg-Al alloy. Phase diagrams of temperature (T-x) and pressure (P-x) are used for the preliminary selection of temperature and pressure in the system, as well as for the evaluation of the separation efficiency of components. The novelty of the research stems from calculating activity coefficients using the selected simplified model. Saturated vapour pressures for Hg (p*Hg) and Al (p*Al) were calculated in the temperature range of 823–1073 K. The high values of the p*Hg / p*Al ≥ 3 . 1010 ratio and separation coefficient llogβHg ≥ 10 provide theoretical premises for selective extraction of these metals by vacuum distillation, where mercury is concentrated in the gas phase (βHg > 1) and aluminium in the liquid phase. The values of excess Gibb’s energy, enthalpy and entropy changes for the liquid-gas interface of Hg-Al alloy were determined: ΔGE/m = 1–3 кJ/mol;  = 1-3 kJ/mol; +-ΔGE/m = 0,03–0,17 kJ/mol. The practical significance of the research lies in minimising the number of initial experiments during the processing of Hg-Al compositions for optimising the temperature and pressure in the vacuum distillation process.

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The authors declare that there are no conflicts of interest present.