A traditional gravity separation technique used primarily for tin ore. Workers place crushed ore in a shallow, inclined wooden frame and agitate it with a shovel under flowing water, allowing the heavier valuable minerals to settle while the lighter waste washes away.
Heard on the job
The crushed ore is too fine for the jig, so we'll have to tramble it to get a clean concentrate.
Related terms
Vanning
The manual process of washing crushed ore on a shovel to evaluate its mineral content.
Tossing
A traditional mineral processing technique that separates heavy ore from lighter waste by violent agitation in water.
Tying
An old mineral processing method where crushed ore is washed in a sloping trough.