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    A new autogenous and semiautogenous mill model for scaleup, design and optimisation Article in Minerals Engineering 17(3):437445 · March 2004 with 276 Reads DOI: 10.1016/j.mineng.2003.10.013

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    Photo of Autogenous Mill at a copper mine. Autogenous Mills operate, mechanically, similar to the ball mill. They differ in the media they use to break or grind the ore. Autogenous Mills use large particles of ore instead of steel or other balls for grinding media. Autogenous mills use large pieces of ore as grinding

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    Autogenous welds, which use no filler metal. Autogenous grinding mills, in which ore grinds itself through tumbling impacts. Autogenous models for the origins of cellular features, such as membranebound organelles or flagella. Autogenous pyrometallurgy, in which the feedstock contains enough combustible material to fuel its own heating.

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    Autogenous welds, which use no filler metal. Autogenous grinding mills, in which ore grinds itself through tumbling impacts. Autogenous models for the origins of cellular features, such as membranebound organelles or flagella. Autogenous pyrometallurgy, in which the feedstock contains enough combustible material to fuel its own heating.

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    In considering autogenous grinding, a study of and testing of the ore for suitability as grinding media is a definite requirement. Autogenous grinding mills are more sensitive to changes in grinding characteristics and other factors affecting milling than rod and ball mills.

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    semi autogenous grinding mill (SAG mill) is an operational unit where many problems may lurk. A suitable overview of historical data should prove useful, indeed (Remes et al. 2006) . This study considers a novel process monitoring overview for Performance Audit of a SemiAutogenous Grinding Mill Circuit

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    PILOT AND LABORATORY TEST PROCEDURES 1 Introduction The attractive feature of semiautogenous grinding mills is that they can be fed directly with coarse ROM (run of mine) ore with 80 per cent passing sizes often in excess of 150 mm. This obviates the need for complex multistage crushing and screening plants prior to milling, although a

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    Table of Contents Autogenous Grinding CircuitsSAG vs Ball Mill AdvantagesAG & SAG Mill Grinding Compared – Which is BestTesting for Product Size Size reduction is the most expensive operation in most mills. Crushing and grinding usually require the greatest portion of capital costs and often make up 6070 percent of total mill operating costs as shown in Figure 1.

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    Advanced Simulation for SemiAutogenous Mill S ystems: A Simplified Models Approach 147 description it is necessary to consider the relationship between the feed stream and mill charge level. This relationship is known as the transport rate and is probably the least developed aspect in models proposed so far (Apelt et al., 2002 a,b).

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    The MacPerson Autogenous Grindability Test determines the MacPherson Correlated Autogenous Work Index*. This can be used in conjunction with the Bond Rod and Ball Mill Work Indices to determine power requirements, and to suggest circuit configurations for autogenous grinding (AG) and semiautogenous grinding (SAG) circuits.

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    A Method of C alculating Autogenous/ SemiAutogenous Grinding Mill Specifi c Energies Using a Combination of Bond Work Indices and Julius Kruttschnitt Parameters, then Applying Effi ciency Factors D Burgess1 ABSTRACT Since the days of mandatory high cost pilot plant testing in 6 ft × 2 ft SAG mills autogenous

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    Over the years the design and operation of single stage autogenous and semi autogenous grinding mills has been a rather hit and miss affair, with some great successes and some dismal failures, with the majority of installation somewhere between. Yet the simplicity, low capital and seemingly simple operation make this a circuit of choice for many.

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    Simplifying wet grinding with AG/SAG mills AG/SAG mills are often the optimum solution for wet grinding (achieved in a slurry 50 to 80 percent solids). AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill.

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