Automatic Control of Rod Mill - Ball Mill a Circuit
Stewart W. Daniel Executive Vice-President, Milltronics Limited, Peterborough, Ontario.
Increasing labour costs, the trend to larger mills, the processing of lower grade ores and a diminishing supply of well-trained and experienced mill operators contribute to the necessity of automating a grinding circuit. With sophisticated process control techniques, supervision of the mill line is reduced to an occasional inspection by the shift supervisor. Process operating decisions and/or adjustments are quickly and accurately performed by the electronic devices to be described. When the variables in the grinding circuit are stabilized using the sensors and controllers as discussed, the over-all grinding circuit is maintained at its optimum grinding load level, with ample protection against under and overloading.