2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2021.1.10 pmi-14123 https://pmi.spmi.ru/pmi/article/view/14123 Металлургия и обогащение Metallurgy and concentration Dynamic simulation of industrial-scale gibbsite crystallization circuit Динамическое моделирование промышленного цикла кристаллизации гиббсита Golubev Vladimir O. Голубев В. О. Golubev Vladimir O. Vladimir.Golubev2@rusal.com 0000-0003-0319-4536 РУСАЛ Инженерно-технологический центр (Санкт-Петербург, Россия) RUSAL Engineering & Research Center (St. Petersburg, Russia) Litvinova Tatyana E. Литвинова Т. Е. Litvinova Tatyana E. viritsa@mail.ru 0000-0002-0133-3400 Санкт-Петербургский горный университет (Санкт-Петербург, Россия) Saint Petersburg Mining University (Saint-Petersburg, Russia) 26 04 2021 2021 247 88 101 22 10 2020 02 03 2021 26 04 2021 © 2021 В. О. Голубев, Т. Е. Литвинова © 2021 Vladimir O. Golubev, Tatyana E. Litvinova 2021 В. О. Голубев, Т. Е. Литвинова Vladimir O. Golubev, Tatyana E. Litvinova Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/14123

Модель популяционного баланса критически важна для улучшения способа массовой кристаллизации гидроксида алюминия и повышения качества управления промышленными нитками декомпозиции. В работе представлена обновленная модель популяционного баланса, которая может использоваться для моделирования декомпозиции в промышленном масштабе. Процессы рождения с распространением и разрушением частиц рассмотрены в качестве неотъемлемых составляющих декомпозиции наряду с вторичным зародышеобразованием, ростом и агломерацией частиц. Принципиальным отличием предложенной системы уравнений стала возможность воспроизведения ею колебательного процесса, возникающего в циклах декомпозиции в результате циклического изменения качества затравочной поверхности. Показана возможность возникновения в такой системе автоколебаний без внешнего воздействия. Улучшенная модель настроена и проверена с помощью архивных промышленных данных. Продемонстрировано точное совпадение рассчитанной динамики изменения фракционного состава гидроксида алюминия с практическими данными при моделировании промышленного цикла декомпозиции с оборотом затравки.

Population balance model is crucial for improving the method of aluminum hydroxide massive crystallization and enhancing the quality of control over industrial precipitation trains. This paper presents the updated population balance model, which can be used for simulation of industrial-scale precipitation. Processes of birth-and-spread and particle breakage are considered integral parts of the precipitation process along with secondary nucleation, growth and agglomeration of particles. The conceptual difference of the proposed system of equations is its ability to reproduce the oscillatory process that occurs in precipitation circuits as a result of cyclic changes in the quality of the seed surface. It is demonstrated that self-oscillations can occur in the system without any external influence. The updated model is adjusted and verified using historical industrial data. The simulation of seed-recycle precipitation circuit showed an exact correspondence between the calculated dynamic pattern of changes in particle size distribution of aluminum hydroxide and the actual data.

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