Open-Circuit HPGR with Edge Recycle

This option obviates the need for fine screening of the HPGR product and instead uses a dividing chute below the HPGR to separate the highly reduced centre product from the coarser “edge” material, as typically practised on test units and at a few commercial operations. The centre product is delivered to downstream processing, while the edge material is returned to HPGR feed.

This arrangement would typically be used where energy efficiency was not of paramount importance, such as heap-leach applicatio.