Calculation of the power draw of dry multicompartment ball mills 229 In order to design a ball mill and to calculate the specific energy of grinding it is necessary to have equations law which relates mill power and mill size and mill operating conditions
Chat OnlineBall Mill Grinding Capacity Calculator Ball Mill MotorPower The basic parameters used in ball mill design power calculations percent of critical speed Critical calculation for ratating ball millPioneer Cement Mill Notebook Scribd Mill Speed Critical Speed Mill Speed No matter how large or small a mill ball mill
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 distribution of 80 passing ¼ inch 6350 microns
Design Method of Ball Mill by Discrete Element Method The physical constants used in these calculations are given in Table 1 In a discrete element method simulation of the inside of a ball mill the coefficient of friction of the balls is the most important factor and it has been
grinding circuit design at kubak using spi and bond Starkey and Bond Ball Mill Work Index testing to determine the grinding energy SPI minutes in Table 2 were converted to specific SAG energy by calculation using the 1600 HP at a mill speed of 75 of critical and that this would be sufficient to
Please find below two calculators for sizing mills using the Bond and Rowland methods Ball mill sizing Calculator for ball mills in a single stage circuit Rod ball mill sizing Calculator for rod mills as first stage of the circuit and ball mills as second stage of the circuit
Ball Mill Design For primary grinding the ratio could vary between 11and 181 For fine regrinding in open circuit the ratio ranges from 131 to 151 Some ball mills are separated in to compartments by grates The grates hold back particles above a certain size for additional grinding
Once you know the ideal speed of rotation for your mill jars you will need to design your mill around this critical parameter With most ball mill designs you have two areas of speed reduction to tweak from the motor drive shaft to the drive pulley and from the roller bar to the milling jar
Ball mill power draw predicted from the Denver slide rule kW 0 200 400 600 Calculated ballmill power draw from the m odel derived kW Data compared Line yx Fig 2 Comparison of the ball mill power draw from the Denver slide rule and the proposed model Dashed line corresponds to yx
DESIGN AND FABRICATION OF MINI BALL MILL METHODOLOGY To ensure the stability of the mini ball mill a ball mill base is design and fabricate to withstand the weight of the rotating jar motor and gears After a few hours stop the mini ball mill and the powder can be
Ball Mill Application and Design Ball mills are simple in design consisting of horizontal slow rotating vessels half filled with grinding media of to 15The particles to be milled are trapped between the grinding media or balls and are reduced in size by the actions of impact and attrition Live Chat
testing measures the macro and micro ore hardness by means of a SAG mill test and a standard Bond Ball Mill Work Index test on SAG ground ore Ore feed is prepared from a minimum of 10 kg of split diamond drill core samples by stage crushing the ore in a jaw crusher to 80 product passing 19 mm
Ball mills are used for dry and wet grinding of different materials such as cement materials cement lime and ceramic materials PSP Engineering has continuously reﬁ ned the design of its ball mills Mill internals Two chamber mills are used for grinding cement slag and similar materials
the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 813 Power drawn by ball semiautogenous and autogenous mills A simplified picture of the mill load is shown in Figure 83 Ad this can be used to establish the essential features of a model for mill
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In this work the design of a cannonball mill type attritor is presented for the production of mechanical alloys at laboratory level They had the following initial specifications of design a 2
Ball mill design calculation Ball Mill DesignPower Calculation 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
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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 openclosed
Mar 31 2008 · Best Answer A ball mill is a horizontal cylinder partly filled with steel balls or occasionally other shapes that rotates on its axis imparting a tumbling and cascading action to the balls Material fed through the mill is crushed by impact and ground by attrition between the balls
handbook foundation ball mill Results 1 44 of 44 Posts Related to vertical roller ball mill handbook pdf vertical roller mill pdf how to design a mill foundation design calculation sample Read more
base are up to 40ft in diameter and ball mills are up to 26ft in diameter The measured gross power draws from these mills are plotted against the model predictions in Figure 1 As indicated by this data base the accuracy of the model 1 standard deviation is 46 How to Use the Model Inputs to the model are made in three windows viz
Figure 5 High–low wave ball mill liner Materials The selection of the material of construction is a function of the application abrasivity of ore size of mill corrosion environment size of balls mill speed etc liner design and material of construction are integral and cannot be chosen in isolation
Enter the width of a mill shell liner Note this is not the width of a lifter You may use the Mill Liner Effective Width calculation to determine this value The mill critical speed will be calculated based on the diameter above less twice this shell liner width Mill Actual RPM Enter the measured mill rotation in revolutions per minute
Metallurgical ContentBall Mill TRUNNION BEARINGSTrunnion BRONZE BUSHINGSTRUNNION BASE AND CAPBall Mill LUBRICANT JACKSBall Mill PINION SHAFT BEARINGS The first part of the mill that we will look at is the TRUNNION BEARING This is a HYDROSTATIC BEARING which is a slow moving bearing that carries a heavy load Usually it is constructed from Babbitt’s metal
A Bond Ball Mill Work Index test may be required for the design of a new mineral processing plant Where possible it is carried out on a sample of ore that is typical of the proposed feed to the plant The BBMWI is then used in the design calculations of the new grinding circuit