08/09/2015
Typical flow sheet designs for Iron Ore beneficiation of hard rock and friable ores.
High grade concentrates and high recovery of iron ore can be achieved using effective feed preparation systems (typically controlled crushing, screening, milling, classification and slimes removal) in combination with cost effective, efficient metallurgical separation.
Hard rock hematite deposits often require a combination of milling, screening and on occasion, fine classification to prepare a finely sized (-1.0mm), liberated feed for beneficiation by gravity separation. This is typically followed by re-grinding of the tailings to liberate more hematite for further iron unit recovery by magnetic separation.
WHIMS are also often employed to recover fine hematite from spiral circuit tailings. The inclusion of medium intensity magnetic drum separation (MIMS) in combination with jigging may be considered for the beneficiation of the 6-1mm fraction of some friable ore bodies.
The following diagram demonstrates some typical flowsheet designs for Iron Ore beneficiation of hard rock and friable ores.