CHINA MINE ENGINEERING

This paper discusses the advantages and problems of semi-autogenous grinding process(SAG) in treating extremely hard ore, and puts forward that the vertical mill, a fine grinding equipment, is introduced into the traditional semi-autogenous grinding process, forming SABCV semi-autogenous grinding process. This process can not only overcome the low efficiency of traditional ball mill in treating fine ore, reduce the energy consumption per unit ore, but also avoid over-crushing and improve the grinding efficiency. The goal of grinding an extremely hard ore from P₈₀ 120mm to P₈₀ 53μm has been achieved, and good economic indexes have been obtained, which provides a new approach for studying the communition process of extremely hard ore.