Abstract:In recent years, with the needs of mine large-scale,upsizing,environmental protection and other needs, SAG mill has gradually become the mainstream grinding equipment of processing plant, but because of the grinding characteristics of SAG mill , the sensitivity of head ore properties is higher than that of conventional grinding and high pressure roller grinding and other systems, so how SAG mill to reach the production target, keep the production capacity and increase the production capacity is an important part of mine enterprise exploration and practice. This paper analyzes and improves the reasons for the failure of 7.5m×3.2m SAG mill in a processing plant, puts forward a variety of methods to improve the production capacity of SAG mill, and carries on the corresponding evaluation for reference when similar mines enterprise facing this problem.