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Mechanistic modeling and simulation of a batch vertical stirred mill
Minerals Engineering ( IF 4.8 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.mineng.2020.106487
A.L.R. Oliveira , V.A. Rodriguez , R.M. de Carvalho , M.S. Powell , L.M. Tavares

Abstract Vertical stirred mills are now widely used in the minerals industry and the increasing variety of models from different manufacturers and number of new units installed worldwide are evidence of the growing interest in them. With so many options available, it becomes ever more difficult at the design stage of a plant to choose the most appropriate mill for a given application. The present work takes advantage of a mechanistic mill model originally developed for ball mills and the discrete element method (DEM) to simulate breakage in a vertical stirred mill. Data from a batch mill, in which two materials were tested (copper ore and limestone), served as the basis for fitting selected material parameters, whereas the remainder were used as default. Mill power has then been predicted using the discrete element method and deviations smaller than 3.5% were found between predictions and measurements. On the basis of these, the model has demonstrated to provide valid predictions from comparisons to size distributions at a fixed grinding time for different stirred speeds and percentages of solids.

中文翻译:

间歇式立式搅拌磨机的力学建模与仿真

摘要 立式搅拌磨机现在广泛用于矿物工业,来自不同制造商的型号越来越多,世界范围内安装的新设备数量越来越多,这证明了对立式搅拌机的兴趣越来越大。由于有如此多的选择,在工厂的设计阶段为给定的应用选择最合适的磨机变得越来越困难。目前的工作利用最初为球磨机开发的机械磨机模型和离散元方法 (DEM) 来模拟立式搅拌磨机中的破碎。来自批量磨机的数据,其中测试了两种材料(铜矿石和石灰石),用作拟合选定材料参数的基础,而其余的用作默认值。然后使用离散元方法预测轧机功率,发现预测和测量之间的偏差小于 3.5%。在这些基础上,该模型已证明可以通过比较固定研磨时间下不同搅拌速度和固体百分比的粒度分布来提供有效的预测。
更新日期:2020-09-01
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