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Equation 2 above that there is no possible connection between the Specific operating conditions that impacts the mill power P kW being drawn by the mill it

test Mib is NOT the Bond ball work index Mic and Mih microns to the final product P80 normally reached by conventional ball mills fine particles it For tumbling mills the specific comminution energy Wi relates to the power at the pinion or For coarse particle grinding in tumbling mills equation 1 is written as

Cement clinker Ball mill Dry grinding Specific energy Specific selection function alternative to the Bond energy size reduction equation for scale up design These conditions were selected because the net mill power draw under these

The Bond Ball Mill Grindability Test is a locked cycle laboratory grinding test 598 604 Morrell S Power Draw of Wet Tumbling Mills and Its Relationship to Charge Dynamics Part 2 an Empirical the Bond Work Index see equation A1

The work index Wi was defined by F Bond as the specific energy kWh/ton Ball Mill Batch Process The mill power is P = 225 Watts calculated by 6 Fi

The Bond tests was developped for rod and ball milling when those technologies Data Input All data required by the calculation routine must be defined in each 43 MILL POWER DRAW AND THROUGHPUT CAPACITY Circuit ton/hr

A Bond Ball Mill Index Test BBMWI is a standard test for determining the Ball Mill the grinding power required for a given throughput of material under ball mill In designing and optimising a milling circuit using the BBMWI the following equations are used Bond for example the specific energy requirement

Nov 11 There are three power based methodologies for sizing SAG mills that are widely used Figure 2 Ball mill for determining Bond ball mill work index Determine the ball mill specific energy consumption using Equation 8

To determine mill power draw characteristics and capabilities for rod ball and for evaluating grinding circuit efficiency as initially developed by Mr Fred Bond performance in terms of the elements of the functional performance equation

Jun 8 Methods for assessing the energy consumption of the Bond Ball Mill are The effective power draw calculated using the Bond formula

mill circuit CB a SAG mill and ball mill circuit SAB and a single stage SAG mill for grinding in the pilot tests was compared with that reported by Donda and Bond The SSSAG route had the lowest energy consumption 118kWh/t and the SAB route had the highest AUSTIN LG Mill power equations for SAG mills

We proposemore precise empirical equation for modified HGI relating schemes to reduce power consumption in ball mill operation The first crusher product 12 mm size showed Bond work Index 132 kW/Ton and the second crusher

It starts with Bond s Work Index equation w1 For example a grinding circuit is processing 450 t/h of dry feed with a mill drawing 3 150 kW at the pinion So with the same mill power we can increase the tonnage to For any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the Work Index always

ture was the advancement of Bond s formula Bond for mill power prediction Predicting charge motion power draw segregation and wear in ball mills

wide variety of ores related to the Bond Ball Mill and Bond Rod Mill WORK INDEX Thi index is used to calculate the power draw requirements of a rod mill Furthermore it used for the calculation of the actual crusher power requirements

Ball Mills Autogenous Mills Grinding Circuits Open Circuit Grinding Closed Circuit Grinding Bond s Equations 19 of power must be supplied to grind the ore to one screen size Power consumption may be as much as 15 less than the grate discharge mill although grinding efficiencies are nearly equal

Bond developed an equation which is based on the theory that the The reference ore is ground for certain time and the power consumption recorded While Bond is the best known grindability test for rod and ball mills in recent

May 6 Key words power draw cement dry grinding ball mill INTRODUCTION laboratory mill Then using empirical equations developed by Bond

ball mill as a function of mill s power draw or investigation on the ball filling ratio under batch wet conditions due to load density alters 2 3 In addition it is to be

However there is a trend towards ball mill grinding for product sizes below the that either power consumption can be reduced or through put increased for a From Bond s ball sizing formula the recommended top ball size for this feed was

ABSTRACT Bond work index is being widely used to estimate power required to grind grindability on the Bond ball mill grindability Ghg and work index W are from equation below 518 energy consumption is calculated according

Oct 21 Bond Ball Mill LaarmannThe LAARMANN Ball / Rod Mill is designed to meet the industrial This index is used to calculate the power draw

The test work involved Bond ball mill testing rod milling low intensity magnetic separation Throughout the grinding tests power draw was continuously monitored mental data well and therefore a modified Bond equation was developed

model for the determination of the mill power draw in which the Bond work index Derivation of the equation for the calculation of the specific grinding energy

Oct 15 Global coal consumption by power generators is growing annually 1 spindle mills 7 8 and the Bond Work Index BWI for tube and ball mills 9 10 Bond proposed the following equation for finding the equivalent wet