Soyuztsvetmetavtomatika JSC, Moscow, Russia:

I. V. Sokolov, Responsible for Process Control System Deployment at the Engineering Department, e-mail: Sokolov@scma.ru

National University of Science and Technology MISiS, Moscow, Russia:

V. V. Morozov, Professor, Doctor of Technical Sciences, e-mail: dchmggu@mail.ru

Saint Petersburg Mining University, Saint Petersburg, Russia:
V. V. Vasiliev, Dean of the Faculty for Postgraduate and Doctoral Studies, Candidate of Technical Sciences, e-mail: Vasilev_VV@pers.spmi.ru
E. A. Lebedik, Assistant Lecturer at the Department of Process and Plant Automation, Candidate of Technical Sciences, e-mail: Lebedik_EA@pers.spmi.ru

This paper examines the problem of monitoring of and control over tube mills, which lies in the fact that such mills combine two successive grinding functions – actual grinding of the initial product (1^st chamber) and its regrinding to the required size (2^nd chamber). It is concluded that each chamber of the tube mill should be controlled separately but synchronously, so that not only the load and process parameters were controlled, but also the two chambers (zones) in their interaction. The paper substantiates that the problem of separate but synchronous control of the chambers (zones) of a tube mill can be solved with the help of a vibroacoustic mill charge analyzer VAZM-1M developed by Soyuztsvetmetavtomatika JSC. The analyzer monitors and controls the mill load based on the correlation between the volume load of the mill (feed material, grinding media, soda solution) and the noise level (based on vibration and/or acoustics). The paper describes the actual performance of the VAZM-1M analyzer when it was used in a single-chamber mill and a two-chamber mill at the facilities of BazelCement-Pikalevo LLC and RUSAL Krasnoturyinsk JSC.

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