Manganese Ore Pre-concentration and Waste Discarding: Gravity, Magnetic Separation and XRT Sorting

Pre-concentration and waste discarding is an effective way to improve manganese ore grade and reduce subsequent grinding and separation load. Three typical pre-separation technologies are gravity separation, magnetic separation and XRT intelligent sorting.

Gravity separation makes use of density difference between manganese mineral and gangue. It is suitable for coarse-grained manganese ore, with low operation cost and stable equipment, but limited separation precision for fine particles. Magnetic separation relies on magnetic difference. It works well for manganese ore with obvious magnetic property difference and can remove magnetic gangue efficiently.

XRT intelligent sorting identifies minerals by X-ray transmission and image recognition, separating ore and waste rock at lump ore stage. It has strong adaptability to complex ore, and realizes dry separation without water consumption. It is very suitable for water-deficient mining areas.

These pre-separation methods can be used independently or in combination. Coarse XRT sorting discards large waste rock firstly, then gravity or magnetic separation further upgrades manganese feedstock. Proper pre-waste removal reduces the tonnage entering grinding system and cuts the overall beneficiation cost.