mills with the rod mill and ball mill laboratory work indices. Note, in Figure. 1, that the rod mill product slope is less than 0.5 due to an extra amount of nes present being ﬁ ﬁ ner than 650 μm. These ﬁ nes proceed to the ball mill improving the ball mill efﬁ ciency. Also, the plotted rod mill P80 value, as shown in Figure 1, is 2900 ...

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Get Price >The F80 is the feed to the primary ball mill. The T80 (is the P80 of the primary ball mill and the F80 to the secondary ball mill circuit) is measured at the pipe departing the primary ball mill. The P80 is the product of the secondary ball mill circuit and is measured at the hydrocyclone overflow.

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Get Price >of the Bond ball mill grindability test. For all model based methods, a reliable method to calculate mill power draw for a given mill is required for the calculation of power draw. Morrell (1996) proposed a mathematical model for autogenous, semi-autogenous and ball mills which is based on the motion of grinding charge inside the mill.

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Get Price >1 Page MINE TO MILL OPTMISATION AT PADDINGTON CEEC. In most metal mining operations, insitu ore is separated from waste rock and is subjected to a series of . more dilute cyclone feed density were thought to be contributing factors to the finer P80 during the second survey. was used to estimate Run of Mine particle size distribution (ROM PSD) because it was expected to.

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Get Price >Let the ball mill P80=150 um (constant), how … Does making the ball mill close circuit, reduce its P80. (e.g letting the hydrocyclone produce an overflow of 130 um). this would mean, most of …

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Get Price >in the Bond ball mill instrumented with a torque-measuring device. Different closing screen sizes were used in the locked-cycle work to produce different size distributions of the mill hold-up, and the operating conditions were changed in the one-size-fraction experiments to obtain different power

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Get Price >The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum and finally the type of circuit open/closed ...

Get Price >Dec 12, 2016· Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size …

Get Price >Mill (grinding) - Wikipedia, the free encyclopedia. Ball mills are characterized by their smaller (comparatively) diameter and longer length, and often have a length, W is the work index measured in a laboratory ball mill (kilowatt-hours per metric or short ton); P80 is the.

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