International Sugar Journal

Addressing constraints in the factory rate-control system* [Full subscriber]

Abstract         Although there are extraction benefits in maintaining a constant first-mill speed, there are inevitably capacity constraints that prevent that speed from being continuously maintained.  This paper presents modifications to a conventional cane-rate control system that have been implemented at Tully to address the constraints.  In order to maximise cane rate, it is generally desirable to operate at a relatively high first-mill speed.  With feeding station constraints, a high first-mill speed may result in occasions when the feeding station is unable to deliver sufficient cane to sustain the desired prepared cane level in the first-mill chute.  During these occasions, best…

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