Abstract
The dissolution of chalcopyrite in acidic potassium dichromate solution has been investigated with respect to the effects of sulphuric acid and potassium dichromate concentrations, by changing stirring speed, leaching temperature and particle size. It was determined that dissolution rate increased with increasing sulphuric acid concentration, potassium dichromate concentration and temperature. A particle size below 75 μm was required to leach > 80% copper in 150 min at 90 °C. The kinetic study showed that the dissolution of chalcopyrite is represented by shrinking core model with diffusion through a porous product layer of sulphur. The activation energy ( E a) for the dissolution reaction was calculated as 24 kJ/mol. Pyrite dissolution from the concentrate was significant in potassium dichromate solutions because of its high oxidation potential.
Sign-in/Register to access full text options 
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.
