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## Rod mill power calculation

As such, when the product is sticky, rod mills are preferred over ball mills. Rod mills have an industrial yield that is less than that of a ball mill, which explains the fact that balls have a much larger grinding surface than rods. The power needed to operate a rod mill could exceed 30% of the power used in a ball mill

• Calculation Of Power For Ball Mills And Grinding- EXODUS

This ball mill and rod mill power draw model is based on a torque model and empirical measurements made by the nordberg equipment company for use by its sales representatives to size grinding mills slight differences in the equations used allow rod mills ,Calculation Of Power For Ball Mills And Grinding

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• how to calculate the resisdence time of rod mills

Bar and Wire Rod Mills - Ingeteam. In a Long Product Hot Rolling Mill (Bar and Wire Rod Mill), there will exist at least a Master Control System. MSC also realized standard calculations such as: to tasks with very small cycle times, and therefore requiring their own hardware

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• How to Measure Grinding Efficiency

Apr 20, 2018 The power per tonne for rod milling is determined from the rod mill feed rate and the power per tonne for ball milling is determined from the ball mill feed rate. Note the efficiency factor of 1.22 lines up with the 1.2 factor recommended for selecting rod mills for rod milling circuit when feed is produced with closed circuit crushing

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• Bond Work Index Formula-Equation

Jul 15, 2013 In the standard ball mill and rod mill grindability tests the specific crack lengths of the product Crp and of the feed Crf are found from their Erp, P, Erf, and F values. Where Y is the cumulative fraction of the feed retained on the mesh size tested the centimeters of new crack length produced per mill revolution are found from:

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• O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

Decision-making on selection of SAG mills increasingly uses the methods of sizing the milling power based on laboratory tests on grindability of minerals. This article considers one of such methods allowing determination of mill characteristics based on the Bond work indexes of crushing, rod

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• Rod mills, how they function - Mine

The rods grind the ore by tumbling within the the mill, similar to the grinding balls in a ball mill. To prevent the conditions leading to rod charge tangling, the length to diameter ratio is maintained at 1.4 to 1.6. Rod mills accept feed up to about 50 mm (2 in.) and produce a product in the size range of 3000 to 270 mm (–4 to –35 mesh)

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• rod and ball mill charge

Feb 08, 2016 Module2 - Rod and Ball Mill Power Draw - Free download as PDF File (pdf), , mill shell 4 The density of a rod charge may vary slightly from 375 lbs per. ... How to Calculate Charge Volume in Ball or Rod Mill Mining and The charge volume of a ball or rod mill is expressed as the percentage of the volume within the. Live Chat. Ball Mills vs Rod

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• AMIT 135: Lesson 6 Grinding Circuit – Mining Mill

The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a rod mill, ball mill or pebble mill. AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill

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• Cutting Power for Face Milling | MITSUBISHI MATERIALS

What is the cutting power required for milling tool steel at a cutting speed of 80m/min. With depth of cut 2mm, cutting width 80mm, and table feed 280mm/min by Φ250 cutter with 12 inserts. Machine coefficient 80%. （Answer） First, calculate the spindle speed in order to obtain feed per tooth. n=1000vc πDC=(1000 80) (3.14 250)=

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• How To Calculate Charge Volume In Ball Or Rod Mill

How To Calculate Charge Volume In Ball Or Rod Mill. Calculation for filling of grinding media charge calculating volume of grinding media charge to calculate grinding media charge for continuous type ball mill m 0000676 x d2 x l example to calculate grinding media charge for a 180 cm dia x 180 cm long batch type ball mill with duralox 50

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• Design, Construction and Performance Analysis of a 5

calculation approaches used in ball and rod mill design processes due to its simplicity and workability. The first approach, which is specific power calculation, determines the power required to grind an ore from a given feed size to a specific product size. The second approach, the shaft power calculation, determines the power required for a

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• Application of Operating Work Indices in Autogenous

Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations   ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have a large effect on profitability. Mill operators have long used operating work indices to evaluate grinding circuit

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• GMSG GUIDELINE: DETERMINING THE BOND

Bond Test WI’s (kWh/t): Rod Mill: Ball Mill: 9.5 kWh/t.8 9 kWh/t . Bond Standard Circuit Work Index: Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19,300 m (although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16,000 m) to a rod

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• Rod Mill Design Calculations

Apr 05, 2018 In selecting rod mills based upon power calculated from grindability tests, the following procedure has been recommended: When calculating rod mill power for a rod-milling-only application, use an inefficiency factor of 1.4 when the feed is... When calculating rod mill power for a

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• Ball Mill Design/Power Calculation

Jun 19, 2015 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

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