HPGR vs. SAG mill
The HPGR is the most energy-efficient comminution device currently available to the minerals processing plant designer, and the focus must be on the development of both machine and flowsheet to maximise the proportion of total comminution performed by the HPGR.
HPGR technology holds the promise of significant improvements in comminution energy efficiency in hard-rock applications when compared to SAG-based circuits. Properly designed HPGR-based circuits offer the potential of significant savings in comminution energy requirements and overall operating costs when compared to SAG-based circuits. Further energy savings are envisioned as progressively more of the comminution load is performed by HPGR, culminating in the generation of final ground product by air classification of HPGR product and the elimination of ball milling.
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