How is sodium hydrosulfide applied in zinc ore flotation?

sodium hydrosulfide reacts with oxide films on mineral surfaces, converting them into sulfide films to improve floatability by altering the surface’s chemical composition and properties.

In zinc ore flotation, it suppresses associated sulfide minerals to upgrade zinc concentrate grade, forming a hydrophilic layer on these minerals to prevent them from floating.

Sodium hydrosulfide adjusts the ionic strength of the pulp, influencing the zeta potential of mineral surfaces, which in turn affects mineral floatability and flotation behavior by altering surface charge distribution.