Effective Removal of Barrier Layer on the Surface of Low-Nickel Matte in an FeCl3-HCl-H2O Solution

Using ferric chloride as an oxidant, here, we investigated the leaching effect of low-nickel matte in a flow field produced by mechanical agitation. The factors affecting reaction, such stirring speed, time, particle size, and inert abrasive quartz sand, were studied. X-ray diffraction (XRD), fluorescence spectroscopy (XRF), laser size analyzer, optical microscopy (OM), scanning electron (SEM) with energy dispersive detector (EDS), Raman spectrometer used to characterize materials before after reaction. contents main metal ions Ni, Cu, Co solution analyzed inductively coupled plasma atomic emission (ICP-AES). control variable method, optimal experimental conditions follows: 2 mol/L FeCl3—0.5 HCl-H2O system sand (mass ratio is 1:5) at 90 °C for 8 h. results showed that blocking solid product sulfur layer was effectively removed continuous realized. efficiencies 98.9%, 99.3%, 98.1%, respectively.