Study of Selectively Pressure Leaching for Concentration Containing NiS

The affecting factors,including oxygen partial pressure,reaction temperature and time,and pH level at the end point of reaction,during the process of pressure leaching for the concentration containing NiS, were studied in the present paper.It was found that(1)the selectively leaching of Cu,Ni,Co can be real- ized;(2)precious metals can be enriched in leaching slag,which opens up a new way for extraction of pre- cious metals;(3)the kinetics of pressure leaching was studied,and the apparent activation energy for the reac- tion was calculated.