''método para a lixiviação de um sulfeto metálico''

摘要

A method (10) for the leaching of a metal sulfide, the method characterised by the steps of: combining a metal sulfide (12) with water to form a slurry (13); directing the slurry (13) to an autoclave (14) for acid leaching at elevated temperature and pressure; adding an oxidant (16) to the autoclave (14); and adding a metal powder (18) to the autoclave (14), whereby the addition of the metal powder (18) reduces a residual acid concentration in a pregnant leach solution (20) that exits the autoclave (14).