Abstract
Aiming at addressing the load behavior of iron ore particles in a ball mill, a design of experimental method was used to define a series of discrete element method simulation conditions with two fa...
Highlights
Iron ore is the primary source for iron- and steelmaking industries, which use the tumbling mills for further comminuting to get the required particle size distribution
The bulk toe of particles appears to be invariant to the mill speed as well as the lifter height so that the influence can be neglected
The average sphericity calculated from the 20 particles is approximately 0.776, which means quite irregular comparing with the sphere so that the simplifications and assumptions of irregular particle as simple spherical shape are unrealistic
Summary
Iron ore is the primary source for iron- and steelmaking industries, which use the tumbling mills for further comminuting to get the required particle size distribution. Establishing power equation of tumbling mill has been investigated intensively for many years. Many researchers assumed that the en-masse mass was located below the line joining the toe and shoulder and the power equation was established on the basis of torque–arm principle.[1,2] The method provided a concise assumption that incorporated all active charge into a point. The size between mill center and this point was the key feature to determine the mill power, while this size was intimately related to the load behavior of the charge.[3] Currently, the key location features (impact toe, bulk toe, shoulder, and head position) were extensively adopted to represent the charge behavior, which provided an elegant description to determine the load behavior quantitatively.[4,5]
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