Integrated mining, processing and waste disposal systems for reduced energy and operating costs at Xstrata Nickel's Sudbury Operations

Abstract

The preconcentration of metal bearing ore through the rejection of coarse, barren waste material is not a new concept. However, the approach has not found wide application in the industry due to several common misconceptions about the principles and potential benefits of the approach. The University of British Columbia (UBC) has been involved in a strategic research programme into mine–mill integration and more specifically ore preconcentration since 1999. From the research it has been concluded that ore preconcentration, either by sorting, or other coarse particle separation methods such as dense media separation, is particularly indicated for improving the economics of heterogenous sulphide mineral deposits through the rejection and disposal of barren waste before milling. These benefits can be maximised through the integration of the technologies into the underground environment. This paper presents the outcome of a comprehensive study by UBC into the application and benefits of the concept at Xstrata Nickel's Sudbury Operations.