Semi autogenous mill or SAG mills as they are often called, canperform grinding operations equivalent to two or three stages ofcrushing and screening. SAG mills are characterized by theirlarge diameter and short length as compared to ball mills. Theinside of the mill is lined with lifting plates to lift thematerial inside the mill, where it then falls off the plates ontothe rest of the ore charge. SAG mills are often used asindustrial grinding mill of modern concentrators, which candirectly produce particle size of finished products or preparefeed materials for the downstream grinding sections.

Introduction of Semi Autogenous Grinding Mill

Like ball mill and rod mill, SAG mill also belongs to horizontalplaced cylinder grinding equipment, the working principle isbasically the same, which by means of processed material itself(or add a small amount of medium) in the simple body ofcontinuous impact, rolling grinding and make the materialcrushing. The filling rate of steel ball in the shell of thesemi-autogenous mill is a main item to distinguish SAG mill andautogenous mill. In order to eliminate the impact of theaccumulation of rock, the autogenous mill allows to add about 3%of the ball (Φ80 ~ Φ120), SAG mill steel ball filling isgenerally 8% ~ 12%, even up to 15%.

Advantages of Semi Autogenous Grinding Mill

Reduce Lifetime Costs

The full range of specifications and wide range of applicationsenable SAG mills to perform grinding operations with fewerconfigurations than conventional mills. This helps to reduce theinvestment and maintenance costs of the SAG mill circuit.

Wide Application

The scope of application is wide due to complete specificationsof SAG mill. The semi-autogenous mill can be equivalent to two orthree stage crushing and screening, rod mill, and part or all ofthe ball mill grinding operation effect.

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Unique grinding expert system can comprehensively monitor thereal-time operation of the SAG mill, grinding status, andmaterial parameters. Through computer control system, make theman-machine interaction effectively, save manpower and improveaccuracy and capacity.

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