A new predictive model of lifter bar wear in mills

How to account for operating condition variability when predicting liner operating life with DEM – A case study

“…In contrast, sliding does not occur for much of collisions that are more normal to the surface, however, these are unlikely to contribute greatly to surface abrasion. Rezaeizadeh et al (2010) extended this model by removing the density factor and using pressure rather than normal force to allow the wear to be represented as height loss perpendicular to the mill liner surface. Alternatively, Kalala et al (2005b) found that impact energy was more important than abrasion for lifter wear for the specific ball mill that they studied.…”

“…Cleary et al (2010) used a four component wear model to predict wear on the liner of a HICOM mill, including the full evolution of the liner profile over its life time, and obtained very good agreement using an abrasion measure as the best wear predictor. Rezaeizadeh et al (2010) and Powell et al (2011) also used a similar approach for prediction of abrasive wear in tumbling mills. This has also recently been applied to predicting wear in compression crushers such as jaw, cone, and roll crushers and hammer mills .…”

“…The first involves explicit estimation based on laboratory measured material properties. This approach was used by Radziszewski and Tarasiewicz (1993) and Rezaeizadeh et al (2010) but this is subject to many measurement and data uncertainties. An alternative approach, proposed by Cleary et al (2010) is to calibrate the maximum wear depth against measured data.…”

“…Kalala et al (2005b) performed a comparison of wear from a two dimensional DEM model of an industrial scale ball mill. Rezaeizadeh et al (2010) considered the wear of a rail shaped lifter in a SAG mill using data from a full size mill compared to a DEM slice model of a pilot scale mill obtaining reasonable agreement on the evolution of the height and width of the liner. Cleary et al (2010) used a four component wear model to predict wear on the liner of a HICOM mill, including the full evolution of the liner profile over its life time, and obtained very good agreement using an abrasion measure as the wear predictor.…”

Discrete element method simulations of load behavior with mono-sized iron ore particles in a ball mill

“…6 Lifter plays a vital role in protecting the mill shell from wear due to its strong influence on the load behavior of charge behavior as well as the grinding efficiency. A portion of cataracting is used for increasing the impact energy for particle breakage, while a portion of cascading is used for the abrasion and attrition.…”