Metso Autogenous and Semiautogenous mills

The feed size for these mills is limited to the maximum size that can be practically conveyed and introduced into the large mill feed chutes. And the product of the large AG/SAG grinding is either a finished size ready of processing, or an immediate size for further grinding in a ball mill, pebble mill, or a VERTIMILL® or a stirred media detritor (SMD).

Simplifying wet grinding with Metso AG/SAG mills
AG/SAG mills are often the optimum solution for wet grinding (achieved in a slurry 50 to 80 percent solids). AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill. All because of the range of mill sizes available, AG/SAG milling extends itself to many applications.

Circuit Design
While the optimum circuit design should be determined during testing of the ore, common flow sheets include:

• AG – SS (Single Stage)
• AG in closed circuit with a crusher
• AG with a crusher and a ball mill
• SAG – SS (Single Stage)
• SAG with ball mill/VERTIMILL®