Control System of Electromagnetic Mill Load

The paper presents control system of a working chamber load of an electromagnetic mill. The mill works in a dry grinding and classification circuit with pneumatic transport. Structure of the circuit is presented in the paper as well as the measurement system. Data acquisition uses direct and indirect measurements. The most challenging are the indirect measurement of the chamber fulfillment and the grinding media load which require special methodology. The proposed approach is explained and exemplary data are presented in the paper. Structure of the control system is described together with the implementation at a semi-industrial plant.