Modelling of the Performance of AG/SAG Mills

2018-2-20 · A new ag/sag mill model has been developed which is based on the dynamics of the grinding charge as well as its size distribution and composition. The effects of changes in such operating conditions as feedsize distribution and ball charge level are inherently described within the model as is the effect of changes to the height and shape of the ...

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The Effect of Ball Size Diameter on Milling Performance, that ball mills have very low efficiencies in terms of the utilization of the generated energy curves appeared to have a broader distribution, indicating more.Effect of Slurry Solids Concentration and Ball Loading on Mill, 2 Mar 2014 Keywords: RTD, Holdup, Ball mill, Ball load, Slurry The shape of RTD curves depends on the combined ...

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2016-6-15 · respect with SAG mills being increasingly less sensitive as the ball charge is increased (Morrel S and Valery W, 2001). 2.2. EFFECT OF FEED SIZE DISTRIBUTION ON SAG MILLING The qualitative eﬀect of changes in particle size distributions (PSD) on the SAG mill performance can be addressed by using the grind curves.

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2013-5-6 · Choosing a SAG Mill To Achieve Design Performance John Starkey1, Principal Consulting Engineer Sami Hindstrom2, Manager, Grinding Travis Orser2, Project Manager, Grinding 1 Starkey & Associates Grinding Design and Process Engineering 336 …

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2020-3-19 · by the mill. Figure 3 - Cone crusher performance curves Following the upgrades in the SAG mill circuit, sampling and modeling of the ball mill circuit identified a bi-modal hardness characteristic of the ore. Evaluation with both MetCom and JK SimMet® lead to changes in the ball make up size from 75 mm to a 50:50 mix of 75 mm and 38 mm.

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Figure 10 SAG mill performance curves for the South Deep mill . running at 60, 70 & 75% critical speed. I-231 . Table 2 Summary of Performance Peaks . Mill Speed Power Peak Throughput Peak Grind Peak.

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2020-6-15 · An indirect consequence of this analysis is the observation that Bond‘s approach, based on feed and product D80 passing sizes, is probably a good estimate for grinding power consumption only in the particular cases. For example, when a rod mill is operated in open circuit or a ball mill is operated in closed circuit with classifier (under normal conditions of circulating load) in which the ...

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2015-12-16 · circuit or the overall performance of an autogenous-semiautogenous (AG-SAG)/ball mill circuit, but they are of limited value in evaluating AG-SAG and ball mill sections separately. This problem arises due to the difficulty of describing particle size distributions with different shapes by one number, the eighty percent passing size. This

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2016-6-6 · SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e.,

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