Sulfidization using Sodium hydrosulfide (NaSH) or Sodium sulfide (Na2S) can be used to recover oxide minerals.
Make An EnquiryAt low dose rates (below 500 g/t), Sodium hydrosulfide (NaSH) can be used as to depress Zn sulfide (e.g. sphalerite) and Fe sulfide (e.g. pyrite, pyrrhotite) minerals.
At medium dose rates, it can be used as an activator for oxidised and tarnished minerals. The choice of whether to use Sodium sulfide (Na2S) or NaSH depends on the pH required in flotation, as Na2S is more alkaline. Users should test to verify which works best.
At high dose rates (above 500g/t), NaSH can be used to depress all sulfides (reverse flotation), allowing gangue to float and be removed.
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