Capacity of roller mill for cement grinding

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Abstract


Engineering for the cement industry is part of the heavy industry. The cement industry is the main supplier of raw materials for the production of concrete and reinforced concrete. For grinding cement, two types of mills are used - ball and roller. Recent decades have proven the great effectiveness of a vertical roller mill for grinding raw materials. Its effectiveness, combined with the implementation of drying, grinding and separation in one unit, gives it an undeniable advantage over a ball mill. This explains the significant increase in the share of roller mills in the cement mill market. The grinding process in such mills occurs due to abrasion, respectively, in the process of work wear of the rubbing parts of the mill occurs. The work evaluated the performance of a mill with smooth disk rolls. During the study, the cause of the destruction of the sectors of the mill produced by FLSmidth, operating in the Russian Federation, was identified. The study revealed the causes of the destruction of the details of the roller mill: with the simultaneous impact of the workload and the displacement of the sectors resulting from intensive wear, the total equivalent stresses exceed the value of the endurance limit under cyclic loading. Therefore, the accumulation of fatigue damage to the material, the formation and growth of cracks, which adversely affects the performance of the mill. A number of measures have been proposed to increase the operability of mills of this design.


About the authors

Nadezhda V. Kalyagina

Bauman Moscow State Technical University (National Research University of Technology)

Author for correspondence.
Email: kornilova-av@rudn.ru
5 2-ya Baumanskaya, bldg 1, Moscow, 105005, Russian Federation

Associate Professor of Department of Applied Mechanics of Faculty of Robotics and Complex Automation of BMSTU; Candidate of Physico-Mathematical Sciences, PhD

Ivan I. Karpukhin

ZAO «Prochnost»

Email: kornilova-av@rudn.ru
8а Ryazanskii Ave, Moscow, 109428, Russian Federation

CEO

Anna V. Kornilova

Peoples’ Friendship University of Russia (RUDN University)

Email: kornilova-av@rudn.ru
6 Miklukho-Maklaya St, Moscow, 117198, Russian Federation

Professor of the Construction Department of the Academy of Engineering of RUDN University; Doctor of Technical Sciences

Igor N. Silverstov

ZAO «Prochnost»

Email: kornilova-av@rudn.ru
8а Ryazanskii Ave, Moscow, 109428, Russian Federation

chief engineer; Candidate of Technical Sciences

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Copyright (c) 2020 Kalyagina N.V., Karpukhin I.I., Kornilova A.V., Silverstov I.N.

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