Re-engineering of ball mill at Novotroitsk Plant of Chromium Compounds

Novotroitsk Plant of Chromium Compounds (NPCC) specializes in the processing of chromite and dolomite ores. Operating experience showed that the loss of operability of the ball mill installed in this workshop leads to unplanned downtime due to the failure of drive elements, which account for 11.3 % of the rated operating time of the workshop. To improve the reliability of technological equipment, it was proposed to replace the existing electric drive with a modern geared motor, which transmits rotation to the mill drum through a gear coupling. As a result of the new drive engineering, it was possible to simplify its design and reduce the labor intensity of maintenance and repair. Additional capital expenditures do not exceed RUB 3.4 million and pay off in less than 3 months.