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Get PriceFollowing a successful commissioning and start-up, we believe that two grinding lines at Las Bambas, Perú, each consisting of one SAG Mill and one Ball Mill (this mill combination is uniquely specific to Las Bambas ore types), are operating at design throughput of close to 140,000 tpd and within the range predicted by DJB from a managed multi-sample geometallurgical testing program (i.e., no

Get PriceJan 01, 1989· International Journal of Mineral Processing, 25 (1989) 41-46 41 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands Calculation of Energy Required for Grinding in a Ball Mill N.M. MAGDALINOVIC University of Belgrade, Technical Faculty at Bor, 19210 Bor (S.F.R. Yugoslavia) (Received June 9, 1987; accepted after revision March 7, 1988) ABSTRACT Magdalinovid, N.M., 1989.

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Get PriceBall Mill Application and Design. Ball mills are used the size reducing or milling of hard materials such as minerals, glass, advanced ceramics, metal oxides, solar cell and semiconductor materials, nutraceuticals and pharmaceuticals materials down to 1 micron or less. The residence time in ball mills .

Get PriceMay 01, 1980· Figure 3 presents a log-log plot of feed-size breakage rate function values, k 1, plotted against measured P/H values for: (a) the dry ball milling of dolomite in a 25.4 29.2 cm mill with different ball loads and mill speeds (Herbst and Fuerstenau, 1973); and (b) the dry ball milling of limestone in different sizes of mill .

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Get Pricedard Circuit, assume 2.44 m diameter overflow mills, and use a rod mill F80 of 16,000 µm and a rod mill P80 of 1,000 µm. Note that—in order for no correction factor for ball mill product fineness to apply—the ball mill circuit P80 should be no less than approximately 70 µm (Bond, 1962). This

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Get PriceBall Mill Design/Power Calculation Ball Mill Power/Design Calculation Example #2. In Example it was determined that a 1400 HP wet grinding ball mill was required to grind 100 TPH of material with a Bond Work Index of 15 (guess what mineral type it is) from 80% passing ¼ inch to 80% passing 100 mesh in closed circuit.

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Get Pricemake-up ball diameter of about 1.7 inches, that is, a mixture weighted. toward 1.5 inches. (3) An increase of 12% in capacity was predicted with the optimum make-. up ball charge with respect to a

Get PriceThe starting point for ball mill media and solids charging generally starts as follows: 50% media charge. Assuming 26% void space between spherical balls (non-spherical, irregularly shaped and mixed-size media will increase or decrease the free space) 50% x 26% = 13% free space. Add to this another 10%-15% above the ball charge for total of 23%

Get Price911 metallurgist ball mill - 911 for the smaller size where large balls are not used. electric steel, although more expensive than hard iron, has and any size can be charged into a equipped with but in most cases the cost per ton of ore ground is the lowest. mm24 grinding opearting tonage.

Get PriceBall mill design calculation pdf ball mill design calculation pdf ball mill designpower calculationun 19 ball mill powerdesign calculation example 2 in example noit was determined that a hp wet grinding ball mill was required to grind 100 tph of material with a bond work index of .

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Get Price2.6.1 Ball size distribution in tumbling mills 37 2.6.2 Milling performance of a ball size distribution 40 2.7 Summary 41 Chapter 3 Experimental equipment and programme 43 3.1 Laboratory grinding mill configuration 43 3.2 Preparation of mono-size grinding media 44 3.3 Feed material preparation 46

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Get PriceSAG MILL GRINDING DESIGN Signiﬁcant differences between macro and micro grindability relationships, and the true magnitude of SAG hardness variability have been discovered for SAG mill and ball mill design measurements. 1. Principal Consulting Engineer, Starkey & Associates Inc, 212-151 Randall Street, Oakville ON L6J 1P5, Canada.

Get PriceJan 01, 2016· Figure 10.1 shows the difference in energy efficiency between a laboratory ball mill and a stirred mill grinding a gold ore using 6 mm diameter alumina balls as media. At a fine grind size there is a clear advantage in energy consumption for a stirred mill over the tumbling mill. However, as the grind size coarsens, the difference in specific energy required to achieve the grind lessens.

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