Abstract
The potential of a Nigerian lead ore in form of galena and anglesite containing 72.82 wt% Pb, 19.95 wt % S, 3.07 wt% Au and 2.77 wt% As, as major elements was treated by sulfamic acid (H3NSO3) solution. The influence of acid concentration, reaction temperature, stirring speed and particle size on the extent of ore dissolution were properly determined. From the results obtained, the dissolution of lead ore increases with increasing H3NSO3 concentration, reaction temperature, stirring speed and decreasing particle size. At a set of experimental conditions (0.75 mol/L H3NSO3, − 70 + 90 µm, 320 rpm, 70 °C), 68.2% of the initial 10 g/L ore reacted within 120 min. The calculated apparent activation energy of 28.35 kJ/mol with reaction order of 0.758 confirmed and supported the proposed diffusion controlled mechanism for the dissolution process appeared to be first-order relation. The leach liquor at optimal conditions as analyzed by atomic absorption spectrophotometry were found to contain 2861 mg/L (68.2%) Pb2+, 270 mg/L (6.44%) Fe2+ and 185 mg/L (5.34%) Zn2+ as major species.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
