Sumitomo Metal Mining launched mixed sulfide production in a commercial process in 2005 at Coral Bay Nickel Corporation in the Philippines. The mixed sulfide produced was processed at the Niihama Nickel Refinery of Sumitomo by using the MCLE (Matte Chlorine Leach Electrowinning) process. The use of mixed sulfide as a feed strongly affected the MCLE process which was originally for nickel matte. A basic study on the most effective chlorine leach conditions for the mixed sulfide was carried out, i.e. grain size, ORP, the effect of copper ion concentration in the solution and technical knowledge was acquired.
展开▼
