SAG Mill

AG/SAG is short for autogenous mill and semi-autogenous mill, it combines with two functions of crushing and grinding, uses the ground material itself as the grinding media and this is the biggest difference compared with ball mill, through the mutual impact and grinding action to gradually reduce the material size.

Diameter: 4000 mm-9000 mm Power: up to 9000KW


Prominer can provide the service work as below

Mineralogical analysis
SAG mill model selection & manufacturing
On-site erection & commissioning and operation training
Customization and OEM service by following the drawing from client


Our equipment with the main advantages as below

Heavy duty design
Adopt endurable and abrasion-proof material for gear, pinion, trunnion, bushing and liner for long life working.
Reliable and continuous running
Optimizing the mill structure and its liner shape to ensure stable performance and higher grinding efficiency.
Energy-saving and high-efficiency
Advanced design for saving the power consumption and improve the grinding efficiency.
Large Scale Production
SAG mill diameter reaches 9000mm.
Easy operation and maintenance
Equipped with feeding trolley, slow drive, jack up system, relining machine, bolt hammer, hydraulic wrench for ensure easily operation and maintenance.
Automation control system
PLC system with touch screen display to realize the automation control. With operation data supervision system.


SAG or AG mill are mainly used in the large scale minerals processing plant include gold ore, copper ore, cobalt ore, nickel ore, graphite, lithium ore, spodumene, coal, silver ore, iron ore, lead and zinc ore.

Project Cases

SAG mill for magnetite LIMS magnetic separation

Single stage SAG Mill was beneficial in reducing CAPEX, when tonnage increased, the SAG Mill can feed downstream ball milling to boost capacity.

SAG mill for gold CIL plant

The particle size of the materials to be ground by SAG mill is 300 ~ 400mm, and the minimum product size of SAG mill to be discharged can reach 0.1 mm.

SAG Mill for gold flotation plant

In order to improve the processing capacity of the mill, a small amount of steel balls be added appropriately, usually occupying 2-3% of the volume of the mill (that is semi-autogenous grinding).

SAG Mill for cooper flotation plant

SAG mills play an important role in copper ore mining by efficiently breaking down large chunks of material into manageable sizes while also using less energy.

SAG Mill for lithium ore flotation

Ground lithium ore in sodium hydroxide or sodium carbonate, after agitation and washing, the fatty acid is added as a collector to directly float the spodumene.

SAG mill for nickel ore grinding

The specific extraction of nickel concentrates taken depend on whether the nickel ore is a sulfide or a laterite.

SAG mill for bauxite grinding

Grinding of bauxite as feed to alumina refineries is undertaken in a variety of grinding circuit types utilizing a range of mill types such as  Rod/Ball Mills, AG/SAG Circuits.

SAG Mill for cobalt flotation plant

The new cobalt recovery technique is a beneficiation process which uses a combination of fine grinding and froth flotation.

Related Equipment

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