In froth flotation, an activator is a chemical compound that alters the surface of a target mineral so it can attach to collector molecules. This allows the mineral to become hydrophobic and float to the surface in the froth layer. Metallurgists use activators when the natural surface chemistry of an ore particle repels standard collectors, making it impossible to recover without chemical intervention.
We need to increase the copper sulfate activator in the rougher circuit to get better zinc recovery.
Related terms
Flotation
A mineral separation method that uses chemical reagents and air bubbles to lift specific target minerals to the surface of a liquid bath.
Depressant
A chemical reagent used in froth flotation to prevent certain minerals from floating.
Concentrator
A facility or machine that separates valuable minerals from waste rock.