Stirred Milling VERTIMILL® Grinding Mills & Stirred Media Detritor

Stirred Milling Metso is the industry leader... Metso has • The most mature stirred milling technologies • The largest installed base in terms of quantity of units and installed power • Continuous development program The stirred milling technologies currently available can be divided into two sub-categories: gravity-induced and fluidized. Gravity-induced stirred mills initiate a ball charge motion via rotational movement of a screw to provide a size reduction mechanism. In contrast, fluidized stirred mills use a rotational movement to fluidize a media-slurry mixture, resulting in a size reduction...

Why Vertical Stirred Mills? With any technology consideration, you want a solution that has the lowest total cost of ownership while meeting the product requirements. Vertically stirred mills have many advantages that make them the lowest total cost of ownership. These advantages include: Lower Capital Cost • Less Floor Space Required • Simple, Smaller Foundation • Faster Installation Lower Operating Cost • Energy Efficient Grinding • Reduced Media Consumption • Lower Maintenance Additional Advantages: • Quiet Operation • High Availability • Greater Operational Safety • Easy to Control and Optimize...

Typical Grinding Ranges Mill Type Ball Mill Ball Mills and stirred mills are applied across a wide range of applications, but for each ore there is optimum efficient range. The figure to the left shows the typical application ranges for ball mills and stirred mill. The Vertimill is always more efficient than a ball mill with energy savings ranging from 30% to greater than 50%. The transition point from the Vertimill to an SMD varies depending on the ore properties but generally is in the range of 20 to 40 microns. A detailed test program can be carried out to determine the optimum energy efficient...

Energy Efficiency Stirred Mills have been proven to provide energy savings compared with traditional ball mills. The finer the product required, the more efficient stirred mills will be than a ball mill. The attrition grinding action, vertical arrangement, and the finer media size distribution contribute to make stirred mills more energy efficient grinding machines. The Vertimill energy savings range from 30% to greater than 50% compared with traditional ball mills and the SMD energy savings are far greater than 50% of ball mill energy in fine grinds. Media Savings Media consumption is directly...

Vertimill Functional Description The Vertimill is typically arranged in closed circuit and fed by the cyclone underflow. The motor power turns the Vertimill screw at constant speed to stir the grinding balls and slurry. As the particles are ground, they rise to the top of the mill and overflows into the separating tank. A change in the rotational direction of the slurry when it transitions from the mill to the separating tank causes turbulence which facilitates a settling of the coarser material. Product from the mill exits the tank through a stand pipe and then to the cyclone sump. The slightly...

SMD Functional Description The feed slurry enters through a feed spout in the top cover which directs the feed into the bottom of the vortex (bottom of the mill) without any inlet head. Grinding media is added either by the automatic Media Addition System through one of the unused feed ports or manually through the media feed chute. Final product leaves the SMD through the media retention screens, situated around the top of the body and is collected in an external launder and is then pumped, or flows under gravity, to the next stage in the process. In operating a SMD, there is no set combination...

Expect results Expect results is our promise to our customers and the essence of our strategy. It is the attitude we share globally.Our business is to deliver results to our customers,to help them reach their goals. Metso Minerals Industries, Inc., 2715 Pleasant Valley Road, York PA, 17402 USA, tel +1 717 849 7213, fax +1 717 849 7252, www.metso.com