Automated SAG Mill Speed Control Using On-contact ...
LDL = purple, Toe = yellow. Outlet fill level = blue, Inlet fill level = red, Shell fill level = green. • Three plots show mill filling slowly over 1.5 hour period (left to right). • Fill levels increase as expected and LDL begins to drop as mill becomes full. • Toe is relatively constant due to no change in speed over this period of time.