Tossing is an early gravity separation method where crushed ore is aggressively stirred or agitated in a tub of water. The violent motion suspends the lighter gangue minerals, allowing the heavier metallic particles to settle at the bottom of the vessel. Once the water is drained or skimmed, the concentrated ore is recovered from the base of the tub for further refining.
Heard on the job
After crushing the cassiterite, we gave it a thorough tossing in the keeve to drop the heavy tin to the bottom.
Also heard as
- tozing