Optimizing of dry autogenous grinding compared to conventional wet grinding

Autogenous grinding in closed circuit has been caried out dry and wet in a highly instrumented setup. The piurpose was to investigate the effect of low fine particle content in the mill charge upon the power draw of the mill. The intent was to improve dry ginding performance towards wett grinding performance as a result of good classification. Particle shape was influenced by the energy used per ton. Low energy gave unregular partilicle while higher energy tended to give more rounded particles.