A rotating disc electrochemical dual autoclave for the study of electrochemistry and leaching at high temperature and pressure Conference Paper uri icon

abstract

  • A study of the pressure acid leaching of chalcopyrite was performed using a unique rotating disc electrochemical dual autoclave. The autoclave permits electrochemical and leaching experiments to be conducted up to 200°C using a chalcopyrite rotating disc electrode. The paper describes in detail the design of the dual autoclave, which consists of a separate pre-heater and reactor. This eliminates heat-up effects, and allows either leaching or electrochemical investigations to be commenced at the correct temperature. The mixed potential measurements and voltammograms of chalcopyrite at 150°C indicate that pressure acid leaching in a solution containing 0.1 M iron(III) will occur quite rapidly. In comparison, when using 120 psi partial pressure of oxygen, the mixed potential is in the so-called prewave region, and hence slow leaching would be expected. Copyright The Electrochemical Society.

publication date

  • 2006-01-01