Ключевые слова

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.2022.91

pmi-15908

https://pmi.spmi.ru/pmi/article/view/15908

Металлургия и обогащение

Metallurgy and concentration

Monitoring of grinding condition in drum mills based on resulting shaft torque

Мониторинг состояния измельчения в барабанных мельницах по результирующему моменту на валу

Zhukovskiy

Yuriy L.

Жуковский

Ю. Л.

Zhukovskiy

Yuriy L.

s215035@stud.spmi.ru

0000-0003-0312-0019

Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia)

Korolev

Nikolay A.

Королев

Н. А.

Korolev

Nikolay A.

s215035@stud.spmi.ru

0000-0002-0583-9695

Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia)

Malkova

Yana M.

Малькова

Я. М.

Malkova

Yana M.

s215035@stud.spmi.ru

0000-0002-7834-0799

Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia)

03 11 2022

2022

256 686 700 20 06 2022 10 10 2022 03 11 2022

2022

Ю. Л. Жуковский, Н. А. Королев, Я. М. Малькова

Yuriy L. Zhukovskiy, Nikolay A. Korolev, Yana M. Malkova

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/15908

Измельчение является самым энергоемким процессом среди всех этапов подготовки сырья и определяет протекание последующих стадий обогащения руды. В соответствии с нагрузочными характеристиками, формируемыми в результате разрушения руды в мельнице, определяется уровень потребления электроэнергии. Скорость барабана мельницы – один из технологических параметров, за счет которого можно осуществлять управление механизмами разрушения руды при выборе скоростного режима работы регулируемого электропривода мельницы. Представленное исследование повышения энергоэффективности за счет использования электропривода мельницы основано на комплексном моделировании технологической части – процесса измельчения и электромеханической части – электропривода процесса измельчения. За счет оценки нагрузочного момента с помощью его разложения в спектр осуществляется идентификация состояния мельницы по смене знаков частотных составляющих спектра момента, а при исследовании электромагнитного момента электропривода осуществляется мониторинг процесса измельчения. Оценка и выбор эффективного режима работы электропривода проводится на основе полученного спектра электромагнитного момента. Результаты исследований показали, что при увеличении скорости барабана мельницы – повышении энергии удара, значения нагрузочных моментов сопоставимы для заданных параметров моделирования. По полученным спектрам можно идентифицировать состояние мельничной загрузки – скорость и уровень заполнения. Представленный подход позволяет оценить влияние изменения технологических показателей процесса измельчения на показатели электромеханической системы. Изменение скоростного режима работы позволит повысить производительность измельчения за счет сокращения времени измельчения руды и не приведет к повышению энергозатрат. Интеграция цифровых моделей технологического процесса и системы автоматизированного электропривода позволяет сформировать основу для построения комплексных способов мониторинга и оценки энергетической эффективности всей технологической цепочки обогащения руды.

Grinding is the most energy-intensive process among all stages of raw material preparation and determines the course of subsequent ore beneficiation stages. Level of electricity consumption is determined in accordance with load characteristics forming as a result of ore destruction in the mill. Mill drum speed is one of process variables due to which it is possible to control ore destruction mechanisms when choosing speed operation mode of adjustable electric mill drive. This study on increasing energy efficiency due to using mill electric drive is based on integrated modelling of process equipment – grinding process and electromechanic equipment – electric drive of grinding process. Evaluating load torque by means of its decomposition into a spectrum, mill condition is identified by changing signs of frequency components of torque spectrum; and when studying electromagnetic torque of electric drive, grinding process is monitored. Evaluation and selection of efficient operation mode of electric drive is based on the obtained spectrum of electromagnetic torque. Research results showed that with increasing mill drum speed – increasing impact energy, load torque values are comparable for the assigned simulation parameters. From the spectra obtained, it is possible to identify mill load condition – speed and fill level. This approach allows evaluating the impact of changes in process variables of grinding process on parameters of electromechanical system. Changing speed operation mode will increase grinding productivity by reducing the time of ore grinding and will not lead to growth of energy consumption. Integration of digital models of the technological process and automated electric drive system allows forming the basis for developing integrated methods of monitoring and evaluation of energy efficiency of the entire technological chain of ore beneficiation.

Ключевые слова барабанные мельницы процесс измельчения DEM-моделирование электропривод имитационная модель идентификация режима работы энергетическая эффективность спектральный анализ

Keywords drum mills grinding process DEM-modelling electric drive simulation model operation mode identification energy efficiency spectral analysis

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