When the temperature is higher than 120 ° C, CuS, NiS can be further oxidized to sulfate.
(6) some of the oxygen ions in the leaching solution can have a catalytic process, such as copper sulfate, may catalyze sphalerite, cadmium sulfide leaching:
ZnS+CuSO 4 =ZnSO 4 +CuS
CuS+2O 2 =CuSO 4
The oxidation rate of the finely divided copper sulfide produced by the reaction is quite large. When hot-pressing oxygen immersion copper blue, the oxidation rate of hydrochloric acid or perchloric acid is higher than that of hydrochloric acid, and its catalytic effect is:
In addition, Fe 2+ , Cu 2+ , Zn 2+ , Ni 2+ , etc. can accelerate the hot-pressure oxygen immersion rate of elemental sulfur.
The hot-pressure oxygen immersion reaction rate of sulfide minerals is related to factors such as reagent concentration, oxygen concentration, phase boundary area, temperature, thickness of the diffusion layer, and catalysis.
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